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Probing the interaction of 3-mercaptophenylboronic acid with carbohydrates using quantum dots
IF 4.1 3区 化学
Journal of Photochemistry and Photobiology A-chemistry Pub Date : 2025-02-10 DOI: 10.1016/j.jphotochem.2025.116340
João V.A. de Lima, Francisco P.T. de Melo, Adriana Fontes , Paulo E. Cabral Filho
{"title":"Probing the interaction of 3-mercaptophenylboronic acid with carbohydrates using quantum dots","authors":"João V.A. de Lima,&nbsp;Francisco P.T. de Melo,&nbsp;Adriana Fontes ,&nbsp;Paulo E. Cabral Filho","doi":"10.1016/j.jphotochem.2025.116340","DOIUrl":"10.1016/j.jphotochem.2025.116340","url":null,"abstract":"<div><div>A fluorescent probe based on quantum dots (QDs) and 3-mercaptophenylboronic acid (MPBA) was applied to study the interaction of MPBA with different carbohydrates. Cadmium telluride (CdTe) QDs functionalized/stabilized with mercaptosuccinic acid (MSA) were conjugated to MPBA using a direct strategy based on the affinity of thiol groups for the nanocrystal semiconductor surface. The conjugation was confirmed through flow cytometry by analyzing the nanosystem interaction with sialic acid (SA) from erythrocyte membranes. The ability of the conjugate to distinguish SA levels was also evaluated using erythrocytes freshly collected (0 days) and stored for different periods (8, 15, and 21 days). Then, the interaction of the QDs-MPBA conjugate, at various pHs, with carbohydrates (glucose, sucrose, xylose, and galactose) was investigated using emission spectroscopy. The capacity of the nanosystem to detect galactose using a fluorescence microplate reader (FMR) was also evaluated. The QDs-MPBA conjugate was able to quantitatively recognize and differentiate SA levels from erythrocyte membranes. Galactose resulted in the highest conjugate fluorescence suppression, enabling its detection. According to the Stern–Volmer model, the quenching was primarily dynamic. Using the FMR, limit of detection (LOD) and limit of quantification (LOQ) for galactose were estimated as 51 and 170 mM, respectively. The conjugate was also able to detect galactose in spiked plasma samples. Therefore, this study demonstrates the potential of the QDs-MPBA nanosystem for optical detection of galactose and for distinguishing SA content in erythrocyte membranes.</div></div>","PeriodicalId":16782,"journal":{"name":"Journal of Photochemistry and Photobiology A-chemistry","volume":"464 ","pages":"Article 116340"},"PeriodicalIF":4.1,"publicationDate":"2025-02-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143420279","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Temperature control of the two-photon brightness and excited state properties of diimide dibenzene sulfonic-acid perylene monomers/aggregates in a binary water-dimethyl sulfoxide solvent mixture
IF 4.1 3区 化学
Journal of Photochemistry and Photobiology A-chemistry Pub Date : 2025-02-10 DOI: 10.1016/j.jphotochem.2025.116338
Danyellen D.M. Galindo, Rafael de Q. Garcia, Bruno M. Bassi, Cleber R. Mendonça, Leonardo De Boni
{"title":"Temperature control of the two-photon brightness and excited state properties of diimide dibenzene sulfonic-acid perylene monomers/aggregates in a binary water-dimethyl sulfoxide solvent mixture","authors":"Danyellen D.M. Galindo,&nbsp;Rafael de Q. Garcia,&nbsp;Bruno M. Bassi,&nbsp;Cleber R. Mendonça,&nbsp;Leonardo De Boni","doi":"10.1016/j.jphotochem.2025.116338","DOIUrl":"10.1016/j.jphotochem.2025.116338","url":null,"abstract":"<div><div>Perylene Diimides (PDIs) are known for their high emission quantum yields and have been used in organic semiconductor and fluorescent probe applications. However, their insolubility in polar solvents, such as water, limits their biological by causing fluorescence-quenching aggregation. To address this, we explored modifications to the PDI structure to enhance solubility. This study focuses on the photophysical properties of Perylene Diimide Dibenzene Sulfonic Acid (PDI BzSA) in different solvent mixtures of Dimethyl Sulfoxide (DMSO) and water. We observed changes from isolated molecules in DMSO to predominantly aggregated forms in water. Using nonlinear optical and ultrafast time-resolved methods, we explored the effects of temperature and solvent composition on the photophysical parameters. Key findings include the solvent environment effect on the excited state and linear optical properties of the monomer, modeled phenomenologically, as well as the aggregation process. We found that the fluorescence quantum yield increased in a 50 % water-DMSO mixture, with quenching at greater water content due to aggregation. Despite the changes in fluorescence yield, two-photon absorption (2PA) cross-sections were minimally impacted by aggregation. Additionally, we demonstrated that temperature can be used to control the two-photon brightness significantly. Ultrafast transient absorption (TA) studies revealed distinct relaxation pathways for monomers and aggregates, with aggregates exhibiting charge transfer features in their excited state absorption spectra. TA anisotropy indicated that aggregates stack in a slightly twisted configuration due to the non-planar sulfonic acid groups.</div></div>","PeriodicalId":16782,"journal":{"name":"Journal of Photochemistry and Photobiology A-chemistry","volume":"464 ","pages":"Article 116338"},"PeriodicalIF":4.1,"publicationDate":"2025-02-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143394647","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Multi-array wax paper-based platform for the colorimetric determination of metal ions in human biofluids: Smart wearable optical sensor (SWOS) towards bioanalysis
IF 4.1 3区 化学
Journal of Photochemistry and Photobiology A-chemistry Pub Date : 2025-02-08 DOI: 10.1016/j.jphotochem.2025.116335
Farnaz Bahavarnia , Mohammad Hasanzadeh
{"title":"Multi-array wax paper-based platform for the colorimetric determination of metal ions in human biofluids: Smart wearable optical sensor (SWOS) towards bioanalysis","authors":"Farnaz Bahavarnia ,&nbsp;Mohammad Hasanzadeh","doi":"10.1016/j.jphotochem.2025.116335","DOIUrl":"10.1016/j.jphotochem.2025.116335","url":null,"abstract":"<div><div>Metal ions are needed to keep the human body healthy, as their presence has or can affect vital biological functions in humans and their existence is essential for survival. Current methods for metal ion analysis struggle with challenges such as low sensitivity, lack of selectivity and complex procedures. Therefore, clinicians urgently need an efficient analysis method/technique. In the present study, a new chemosensing method was proposed for the sensitive recognition of Co(II), Cu (II), and Pb (II) ions. In this method, a chemical reaction occurs between metal ions and triangular silver nanoparticles (TA-AgNPs) which served as optical prob, resulting in a color change detected by an engineered colorimetric method. UV–visible spectrophotometry also confirms the reaction, as the interaction between metal ions and TA-AgNPs causes a significant change in the absorption spectrum. This enables the rapid and reliable measurement of these important metal ions with a detection limit of less than 10 nM to 300 mM in human body fluids. Finally, Co(II), Cu (II), and Pb (II) cations were determined by a novel microfluidic chemosensor which engineered by multi-array wax paper-based method. Therefore, a novel portable photo-sensor was developed for the sensitive and specific monitoring of Co(II), Cu (II), and Pb (II) cations in human real samples. In the presence of metal ions, constructed microfluidic paper-based colorimetric devices (<em>μ</em>PCDs) work based on color alternation of the sensing probe, such that the blue color of the TA-AgNPrs solution was changed to light orange in the presence of Co(II), and Cu(II) was changed to yellow, Pb(II) was changed to light blue which confirmed suitable application of the engineered platform for the rapid identification of ions. Therefore, an innovative method was suggested for the <em>in-situ</em> and <em>on-demand</em> opto-analysis of metal ions in human urine samples which is expected to help improve environmental health and safety in the workplace.</div></div>","PeriodicalId":16782,"journal":{"name":"Journal of Photochemistry and Photobiology A-chemistry","volume":"464 ","pages":"Article 116335"},"PeriodicalIF":4.1,"publicationDate":"2025-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143394646","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
8-Hydroxyquinoline based novel fluorogenic sensor for Sensitive and selective Cd2+ detection and its Applications: Soil, Foodstuffs, smartphone and living cell
IF 4.1 3区 化学
Journal of Photochemistry and Photobiology A-chemistry Pub Date : 2025-02-08 DOI: 10.1016/j.jphotochem.2025.116336
Meliha Kutluca Alici
{"title":"8-Hydroxyquinoline based novel fluorogenic sensor for Sensitive and selective Cd2+ detection and its Applications: Soil, Foodstuffs, smartphone and living cell","authors":"Meliha Kutluca Alici","doi":"10.1016/j.jphotochem.2025.116336","DOIUrl":"10.1016/j.jphotochem.2025.116336","url":null,"abstract":"<div><div>Cadmium is extensively utilized in various fields, mostly in industry and agriculture. Cadmium contamination of food, water, and soil can lead to major issues, like metabolic diseases and environmental degradation. The detection of cadmium is important due to these problems. In this study, an uncomplicated, efficient, and reversible fluorogenic sensor, <strong>HQM</strong> (2-amino-3-(((8-hydroxyquinolin-7-yl)methylene)amino)maleonitrile), composed of 7-formyl-8-hydroxyquinoline linked to diaminomalonitrile, was created for the determination of Cd<sup>2+</sup>. the sensor exhibited high selectivity for Cd<sup>2+</sup> among various metal ions. The detection limit of <strong>HQM</strong> for Cd<sup>2+</sup> was calculated as 0.25 µM. Application experiments on soil, foodstuffs, and living cells demonstrated the effective in-situ detection capabilities of <strong>HQM</strong> for Cd<sup>2+</sup>, indicating its promising potential for simple, rapid, and in-situ monitoring of Cd<sup>2+</sup> in solutions.</div></div>","PeriodicalId":16782,"journal":{"name":"Journal of Photochemistry and Photobiology A-chemistry","volume":"464 ","pages":"Article 116336"},"PeriodicalIF":4.1,"publicationDate":"2025-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143394648","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Synthesis, characterization, photocatalytic activity of selenium vacancy in BiSeX and BiSeX/GO (X = Cl、Br、I) photocatalysts
IF 4.1 3区 化学
Journal of Photochemistry and Photobiology A-chemistry Pub Date : 2025-02-07 DOI: 10.1016/j.jphotochem.2025.116330
Yu-Yun Lin, Hong-Han Huang, Shiuh-Tsuen Huang, Fu-Yu Liu, Jia-Hao Lin, Chiing-Chang Chen
{"title":"Synthesis, characterization, photocatalytic activity of selenium vacancy in BiSeX and BiSeX/GO (X = Cl、Br、I) photocatalysts","authors":"Yu-Yun Lin,&nbsp;Hong-Han Huang,&nbsp;Shiuh-Tsuen Huang,&nbsp;Fu-Yu Liu,&nbsp;Jia-Hao Lin,&nbsp;Chiing-Chang Chen","doi":"10.1016/j.jphotochem.2025.116330","DOIUrl":"10.1016/j.jphotochem.2025.116330","url":null,"abstract":"<div><div>BiSeX (X = Cl, Br, I) belongs to the V–VI–VII compounds, known for their high dielectric constants, ferroelectric properties, excellent photoconductivity, and well-suited valence bands. In this study, we successfully synthesized a series of BiSeX compounds through a simple hydrothermal method. We then combined varying amounts of graphene oxide (GO) with BiSeX in an autoclave, heating the mixture at 100 °C for 4 h to create the binary composite photocatalyst BiSeX/GO. The resulting products were extensively characterized using XRD, SEM-EDS, DR-UV, GC, BET, PL, UV–Vis-NIR, and HR-XPS techniques. To assess the photocatalytic efficiency of BiSeX and BiSeX/GO, these catalysts were tested for the degradation of the organic pollutant crystal violet (CV), yielding significant outcomes. BiSeCl/GO-25 wt% demonstrated exceptional effectiveness in degrading CV dyes, achieving a maximum reaction rate constant (<em>k</em>) of 0.0465 h<sup>−1</sup>. Additionally, the photocatalytic conversion of carbon dioxide into chemical fuels offers a promising strategy to tackle escalating environmental issues and holds potential for renewable energy development. Our research revealed that selenium vacancies in BiSeX act as adsorption sites, significantly enhancing electron transfer at the interface, resulting in high activity and selectivity for the carbon dioxide reduction reaction.</div></div>","PeriodicalId":16782,"journal":{"name":"Journal of Photochemistry and Photobiology A-chemistry","volume":"464 ","pages":"Article 116330"},"PeriodicalIF":4.1,"publicationDate":"2025-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143402611","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A novel S-scheme heterojunction magnetic photocatalyst for enhanced degradation of naphthalene in various aqueous solutions and soil
IF 4.1 3区 化学
Journal of Photochemistry and Photobiology A-chemistry Pub Date : 2025-02-07 DOI: 10.1016/j.jphotochem.2025.116314
Moones Honarmand , Ahmad Aryafar , Seyede Sajedeh Rezaei , Atena Naeimi
{"title":"A novel S-scheme heterojunction magnetic photocatalyst for enhanced degradation of naphthalene in various aqueous solutions and soil","authors":"Moones Honarmand ,&nbsp;Ahmad Aryafar ,&nbsp;Seyede Sajedeh Rezaei ,&nbsp;Atena Naeimi","doi":"10.1016/j.jphotochem.2025.116314","DOIUrl":"10.1016/j.jphotochem.2025.116314","url":null,"abstract":"<div><div>The presence of polycyclic aromatic hydrocarbons in the environment has caused global concerns due to their adverse effects on living organisms. Photocatalysts have emerged as a suitable solution for this problem. The present study introduces an innovative approach in which a magnetic ternary heterojunction photocatalyst based on spinel zinc ferrite (ZnFe<sub>2</sub>O<sub>4</sub>), tri-cobalt tetraoxide (Co<sub>3</sub>O<sub>4</sub>), and bentonite was synthesized. The photocatalytic degradation of naphthalene was carried out by ZnFe<sub>2</sub>O<sub>4</sub>-bentonite-Co<sub>3</sub>O<sub>4</sub> under solar irradiation. The effects of six operating conditions including photolysis, adsorption, type of catalyst, dosage of photocatalyst, initial naphthalene concentration, and initial pH value were checked experimentally. Under optimized conditions, the ZnFe<sub>2</sub>O<sub>4</sub>-bentonite-Co<sub>3</sub>O<sub>4</sub> heterojunction photocatalyst could altogether remove naphthalene. In addition, a high potential was observed in the practical application of the ZnFe<sub>2</sub>O<sub>4</sub>-bentonite-Co<sub>3</sub>O<sub>4</sub> system for the degradation of naphthalene in tap water, seawater, wastewater and soil contaminated with naphthalene. The impact of irrigation on the growth of wheat plants was evaluated. It was proved that the ZnFe<sub>2</sub>O<sub>4</sub>-bentonite-Co<sub>3</sub>O<sub>4</sub> system could degrade naphthalene into non-toxic intermediates, and the seed germination rate was even higher using treated water compared to distilled water. Quench experiments determined that all the active species participated in the photodegradation of naphthalene over ZnFe<sub>2</sub>O<sub>4</sub>-bentonite-Co<sub>3</sub>O<sub>4</sub>, and based on the findings, the S-scheme mechanism was proposed. The reusability of ZnFe<sub>2</sub>O<sub>4</sub>-bentonite-Co<sub>3</sub>O<sub>4</sub> magnetic photocatalyst was examined and approximately 16% decrease in naphthalene degradation efficiency was observed after three consecutive runs. Overall, this study opened a new perspective for the practical application of magnetic heterojunction photocatalysts in the degradation of persistent organic pollutants in aqueous solutions and soil.</div></div>","PeriodicalId":16782,"journal":{"name":"Journal of Photochemistry and Photobiology A-chemistry","volume":"464 ","pages":"Article 116314"},"PeriodicalIF":4.1,"publicationDate":"2025-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143388402","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The application of TiO2@UiO-66-(OH)2 composites for the photocatalytic degradation of gaseous formaldehyde under visible light
IF 4.1 3区 化学
Journal of Photochemistry and Photobiology A-chemistry Pub Date : 2025-02-06 DOI: 10.1016/j.jphotochem.2025.116328
Mengyao Hua, Siyi Wang, Meng Cheng, Guangming Liang, Lei Xu, Yafen Zhou
{"title":"The application of TiO2@UiO-66-(OH)2 composites for the photocatalytic degradation of gaseous formaldehyde under visible light","authors":"Mengyao Hua,&nbsp;Siyi Wang,&nbsp;Meng Cheng,&nbsp;Guangming Liang,&nbsp;Lei Xu,&nbsp;Yafen Zhou","doi":"10.1016/j.jphotochem.2025.116328","DOIUrl":"10.1016/j.jphotochem.2025.116328","url":null,"abstract":"<div><div>Photocatalysts TiO<sub>2</sub>@UiO-66-(OH)<sub>2</sub> was successfully synthesized via an impregnation method for removal of formaldehyde under high pressure mercury lamp irradiation, and the photocatalysts were characterized by using a variety of analytical techniques. The characterized results indicated that TiO<sub>2</sub> was attached to the surface of UiO-66-(OH)<sub>2</sub>, and there was a strong electronic interaction between the elements of TiO<sub>2</sub> and UiO-66-(OH)<sub>2</sub> in the composite. The synergistic combination of high adsorption capacity of UiO-66-(OH)<sub>2</sub>, high dispersion of TiO<sub>2</sub> and efficient interfacial charge transfer between UiO-66-(OH)<sub>2</sub> and TiO<sub>2</sub> have a significant impact on the enhanced photocatalytic performance for formaldehyde removal. And the hydroxyl radicals (⋅OH) and superoxide radicals (⋅O<sub>2</sub><sup>−</sup>) also play a major role in removal of formaldehyde. The formaldehyde removal rate of 20TiO<sub>2</sub>@UO (1 g 0.15 m<sup>3</sup>) is 83.01 % within 5.5 h, if the removal time is extended to 24 h, the formaldehyde removal rate can reach 91.49 %, and the continuous photocatalytic reaction showed that the composite is a highly stable catalyst. This could provide a useful method for highly efficient formaldehyde in indoor air purification.</div></div>","PeriodicalId":16782,"journal":{"name":"Journal of Photochemistry and Photobiology A-chemistry","volume":"464 ","pages":"Article 116328"},"PeriodicalIF":4.1,"publicationDate":"2025-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143402610","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A new application for simultaneous phosphorus compounds removal and antibiotics degradation over magnesium-based layered double hydroxides
IF 4.1 3区 化学
Journal of Photochemistry and Photobiology A-chemistry Pub Date : 2025-02-06 DOI: 10.1016/j.jphotochem.2025.116329
Yanhui Zhang, Hao Zhou, Yisha Zheng, Wenlong Xiang
{"title":"A new application for simultaneous phosphorus compounds removal and antibiotics degradation over magnesium-based layered double hydroxides","authors":"Yanhui Zhang,&nbsp;Hao Zhou,&nbsp;Yisha Zheng,&nbsp;Wenlong Xiang","doi":"10.1016/j.jphotochem.2025.116329","DOIUrl":"10.1016/j.jphotochem.2025.116329","url":null,"abstract":"<div><div>Magnesium-based layered double hydroxides (MgM-LDHs, M = Al, Ga, In) were synthesized by one-step coprecipitation method, which is a simple and mass-production method. The catalytic performance of MgAl-LDHs, MgGa-LDHs and MgIn-LDHs in the photocatalytic degradation of antibiotics (ciprofloxacin and tetracycline hydrochloride) was systematically investigated. The results showed that the photocatalytic activities of MgAl-LDHs, MgGa-LDHs and MgIn-LDHs were comparable, but MgAl-LDHs exhibited superior degradation efficiency of antibiotics. Through control experiments, the possible mechanism of photocatalytic degradation of antibiotics by MgAl-LDHs was elucidated. Furthermore, it was observed that the adsorption of phosphorus compounds by MgAl-LDHs significantly enhances its photocatalytic activity in degrading ciprofloxacin. This finding suggests that incorporating phosphorus compounds into MgAl-LDHs can improve their efficacy in water pollution control. Overall, our work extends the application scope of MgM-LDHs (M = Al, Ga, In) and underscore the significance of active participation in water pollution control research to mitigate adverse effects on human health.</div></div>","PeriodicalId":16782,"journal":{"name":"Journal of Photochemistry and Photobiology A-chemistry","volume":"464 ","pages":"Article 116329"},"PeriodicalIF":4.1,"publicationDate":"2025-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143373008","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Factors affecting photocatalytic oxygen evolution over SrTiO3
IF 4.1 3区 化学
Journal of Photochemistry and Photobiology A-chemistry Pub Date : 2025-02-01 DOI: 10.1016/j.jphotochem.2025.116319
Suzuko Yamazaki , Haruka Munesada , Narumi Mori , Yoshihisa Sakata
{"title":"Factors affecting photocatalytic oxygen evolution over SrTiO3","authors":"Suzuko Yamazaki ,&nbsp;Haruka Munesada ,&nbsp;Narumi Mori ,&nbsp;Yoshihisa Sakata","doi":"10.1016/j.jphotochem.2025.116319","DOIUrl":"10.1016/j.jphotochem.2025.116319","url":null,"abstract":"<div><div>For efficient photocatalytic water splitting, it is needed to accelerate O<sub>2</sub> evolution process which is a rate-limiting step. We studied systematically to elucidate key factors for enhancing the O<sub>2</sub> evolution of Na<sup>+</sup>-doped SrTiO<sub>3</sub>. By using a commercially available SrTiO<sub>3</sub> (STO(C)), the optimal synthetic condition was determined. As substrates for the doping, we synthesized STO by hydrothermal methods (HT) under various temperatures. All particles of HT(180°C) were near-spherical but many cubic particles were obtained for HT(200 °C). The optimal Na<sup>+</sup>-doping amount for both HT samples was 4.0 atom% whereas 2.0 atom% for STO(C). Their O<sub>2</sub> evolution rates were compared in relation to their physical properties such as the crystallite size, the specific surface area, and the chemical composition of the surface. In X-ray photoelectron spectroscopy (XPS), the ratio of lattice oxygen to adsorbed oxygen on the surface is varied depending on the substrates and the Na<sup>+</sup>-doping amounts but is obtained to be 7: 3 for Na(2.0)-STO(C), Na(4.0)-HT(180 °C), and Na(4.0)-HT(200 °C). The O<sub>2</sub> evolution rate of Na(2.0)-STO(C) is higher than that of Na(4.0)-HT(200 °C) or Na(4.0)-HT(180°C) by a factor of 1.8 or 3.2, respectively. The highest O<sub>2</sub> evolution rate observed with Na(2.0)-STO(C) is attributable to the largest crystalline size (75.6 nm). Furthermore, it is likely that more oxygen vacancy is formed on Na(2.0)-STO(C) because the binding energies of the Ti2p and O<sub>lattice</sub> peaks in XPS shifted significantly to lower energies.</div></div>","PeriodicalId":16782,"journal":{"name":"Journal of Photochemistry and Photobiology A-chemistry","volume":"464 ","pages":"Article 116319"},"PeriodicalIF":4.1,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143158008","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Na5Gd(MoO4)4: Sm3+ – A red molybdate phosphor with exceptional thermal stability for plant growth lighting
IF 4.1 3区 化学
Journal of Photochemistry and Photobiology A-chemistry Pub Date : 2025-01-31 DOI: 10.1016/j.jphotochem.2025.116307
Haochang Ye , Wei Zhang , Xuxin Cheng , Zhengfa Hu , Xia Sheng , Wei Xie , Zuyong Feng , Lanwei Qiu , Guangting Xiong
{"title":"Na5Gd(MoO4)4: Sm3+ – A red molybdate phosphor with exceptional thermal stability for plant growth lighting","authors":"Haochang Ye ,&nbsp;Wei Zhang ,&nbsp;Xuxin Cheng ,&nbsp;Zhengfa Hu ,&nbsp;Xia Sheng ,&nbsp;Wei Xie ,&nbsp;Zuyong Feng ,&nbsp;Lanwei Qiu ,&nbsp;Guangting Xiong","doi":"10.1016/j.jphotochem.2025.116307","DOIUrl":"10.1016/j.jphotochem.2025.116307","url":null,"abstract":"<div><div>Na<sub>5</sub>Gd<sub>1−x</sub>(MoO<sub>4</sub>)<sub>4</sub>:xSm<sup>3+</sup> (x = 0–0.12) phosphors were synthesized via a high-temperature solid-state technique. Comprehensive analysis was performed on the phase purity, crystal structure, luminescence behavior, and thermal stability of the phosphors. Under excitation at 405 nm, due to the <sup>4</sup>G<sub>5/2</sub>-<sup>6</sup>H<sub>i</sub> (i = 5/2, 7/2, 9/2, and 11/2) transitions of Sm<sup>3+</sup> ions, the phosphors emit relatively intense red light. Remarkably, at 150 °C, the integrated emission intensity of Na<sub>5</sub>Gd<sub>0.92</sub>(MoO<sub>4</sub>)<sub>4</sub>:0.08Sm<sup>3+</sup> attains 96 % of its value at ambient temperature, demonstrating its excellent thermal stability. A LED light source is created using a commercial 405 nm LED chip and Na<sub>5</sub>Gd<sub>0.92</sub>(MoO<sub>4</sub>)<sub>4</sub>:0.08Sm<sup>3+</sup> phosphor, emitting a vibrant red light. Its electroluminescence spectrum overlaps with the absorption peaks of plant chlorophyll <em>a</em>/<em>b</em> and the phytochrome P<sub>R</sub>/P<sub>FR</sub> spectra, indicating its potential for use in plant growth lighting applications.</div></div>","PeriodicalId":16782,"journal":{"name":"Journal of Photochemistry and Photobiology A-chemistry","volume":"463 ","pages":"Article 116307"},"PeriodicalIF":4.1,"publicationDate":"2025-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143142471","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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