Journal of Photochemistry and Photobiology A-chemistry最新文献

{"title":"Photocatalytic generation of reactive oxygen species in the presence of colloidal PbS quantum dots","authors":"Oleg Vladimirovich Ovchinnikov,&nbsp;Sergey Vladimirovich Aslanov,&nbsp;Tamara Sergeevna Kondratenko,&nbsp;Mikhail Serveevich Smirnov,&nbsp;Kirill Sergeevich Chirkov,&nbsp;Irina Gennadyevna Grevtseva,&nbsp;Dmitry Alekseevich Chentsov","doi":"10.1016/j.jphotochem.2025.116455","DOIUrl":"10.1016/j.jphotochem.2025.116455","url":null,"abstract":"<div><div>The regularities of the photocatalytic generation of reactive oxygen species by colloidal PbS quantum dots with an average size of 2.5 nm, passivated with thioglycolic, 2- and 3-mercaptopropionic acids, have been investigated. Using selective absorption-luminescence sensors, the generation of superoxide, hydrogen peroxide, and singlet oxygen was detected in presence of PbS quantum dots upon excitation with 780 nm radiation. The introduction of a hole acceptor led to an increase in the generation of superoxide and hydrogen peroxide. However, no significant change in the rate of singlet oxygen generation was observed. It was shown that the growth of a dielectric SiO₂ shell on the surface of PbS quantum dots suppresses the photocatalytic generation of superoxide and hydrogen peroxide. At the same time, sensitization of singlet oxygen was observed due to resonance energy transfer. The photocatalytic generation of superoxide and hydrogen peroxide occurs due to photoinduced charge carrier transfer. Based on the obtained data, an empirical model of photoprocesses leading to the generation of reactive oxygen species by PbS quantum dots is proposed.</div></div>","PeriodicalId":16782,"journal":{"name":"Journal of Photochemistry and Photobiology A-chemistry","volume":"467 ","pages":"Article 116455"},"PeriodicalIF":4.1,"publicationDate":"2025-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143874565","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}

{"title":"A novel N-doped porous carbon-supported g-C3N4 composite for enhanced photocatalytic CO2 conversion","authors":"Roopesh Mekkat ,&nbsp;Edith Mawunya Kutorglo ,&nbsp;Milena Setka ,&nbsp;Andrey. Prokhorov ,&nbsp;Miroslav Šoóš","doi":"10.1016/j.jphotochem.2025.116454","DOIUrl":"10.1016/j.jphotochem.2025.116454","url":null,"abstract":"<div><div>The solar light-driven CO₂ conversion into hydrocarbon fuels is regarded as one of the most crucial inventions to reduce CO₂ abundance in the atmosphere and fulfill energy needs. Graphitic carbon nitride (g-C₃N₄) has garnered considerable attention and emerges as a promising candidate for photocatalytic CO₂ reduction, owing to its visible light absorption, metal-free, and environmentally benign nature. However, its ability to effectively achieve this is currently hindered by several factors such as relatively low surface area, fast electron-hole recombination rate and limited CO₂ adsorption capacity, which also constrain its practical applicability. In this work, a novel photocatalyst was synthesized by incorporating a suitable amount of ZIF-8 derived N-doped porous carbon into g-C₃N₄ without affecting its light absorption capacity. The as-prepared samples were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FT-IR), nitrogen and CO₂ adsorption measurements, X-ray photoelectron spectroscopy (XPS), UV–Vis diffuse reflectance absorption spectra (UV-DRS), and photoluminescence spectroscopy (PL). Compared to g-C₃N₄, the optimized photocatalyst exhibited a 54-fold increase in surface area, a 3.5-fold enhancement in CO₂ adsorption capacity, a reduced optical bandgap, and significantly superior photocatalytic activity for CO₂ reduction, achieving CH₄ production at 70.87 μmol h⁻¹ g⁻¹ and C₂H₆ production at 35.31 μmol h⁻¹ g⁻¹. The enhanced activity of the composites is attributed to the synergistic effect of the N-doped carbon and g-C₃N₄. Thus, this approach offers a promising strategy for the future development of C₃N₄-based catalysts for efficient solar to fuel conversion.</div></div>","PeriodicalId":16782,"journal":{"name":"Journal of Photochemistry and Photobiology A-chemistry","volume":"467 ","pages":"Article 116454"},"PeriodicalIF":4.1,"publicationDate":"2025-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143877048","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}

{"title":"Delignification of wood and infiltration with alumina/polyvinylpyrrolidone nanofiber-reinforced nanocomposite toward photoluminescent smart window for detection and filtration of ultraviolet radiation","authors":"Salhah D. Al-Qahtani ,&nbsp;Ghadah M. Al-Senani ,&nbsp;Maryam Aldoghaim","doi":"10.1016/j.jphotochem.2025.116456","DOIUrl":"10.1016/j.jphotochem.2025.116456","url":null,"abstract":"<div><div>Novel photoluminescent hardwood that can change color under ultraviolet illumination was developed. Transparent wood templates with afterglow and photochromic properties were developed by infiltrating a mixture of electrospun alumina/polyvinylpyrrolidone nanofiber-reinforced polystyrene nanocomposite and rare-earth aluminate (REA) into a delignified hardwood. The REA pigment has excellent thermal stability and photostability. Avoiding aggregation of the pigment nanoparticles (NPs) while dispersing the REA nanopigment in an alumina nanofiber-reinforced pre-polymerized polystyrene is significant for the development of a transparent photoluminescent wood. The photoluminescence spectra and colorimetric data showed that the transparent wood switches to green under UV illumination. The REA pigment was synthesized by the solid-state method, whereas the REA nanopowder was developed by the top-down technology. A spinnable solution of polyvinylpyrrolidone/aluminum chloride was developed by the sol–gel method. EAN was then calcinated to provide alumina fibers with diameters of 50–200 nm. The pigment nanoparticles displayed diameters of 8–15 nm. The transparent wood that emitted light upon excitation at 375 nm displayed a strong emission peak at 518 nm. Improved water resistance and UV protection were observed with increasing the phosphor concentration.</div></div>","PeriodicalId":16782,"journal":{"name":"Journal of Photochemistry and Photobiology A-chemistry","volume":"467 ","pages":"Article 116456"},"PeriodicalIF":4.1,"publicationDate":"2025-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143868682","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}

{"title":"Improved piezo-photocatalytic performance of ultra-thin BaTiO3 nanosheets with exposed {001} facets","authors":"Nan Zhao ,&nbsp;Li Sun ,&nbsp;Jianjiao Xin ,&nbsp;Zhuanfang Zhang ,&nbsp;Xiuwen Wang","doi":"10.1016/j.jphotochem.2025.116445","DOIUrl":"10.1016/j.jphotochem.2025.116445","url":null,"abstract":"<div><div>The photocatalytic efficiency of the catalyst is significantly influenced by the separation distance between photogenerated electrons and holes. In this study, ultrathin tetragonal BaTiO₃ nanosheets with a thickness of approximately 20 nm and exposed {001} facets were successfully synthesized via hydrothermal method. Subsequent photocatalytic degradation experiments revealed that the ultrathin nanosheet structure possesses enhanced deformability, significantly increased specific surface area, and improved light transmittance. Driven by out-of-plane piezoelectric fields perpendicular to the {001} facets, charge carriers migrate shorter distances toward the nanosheet surfaces to participate in catalytic reactions, effectively suppressing carrier recombination. Surface oxygen vacancies further facilitate charge separation. Under simultaneous ultrasonic and light irradiation, the BaTiO₃ nanosheets achieved 93.9 % methylene blue degradation within 60 min, outperforming both BaTiO₃ nanowires and nanoparticles. This microstructural optimization enhances the material’s piezo-photocatalytic performance, offering a novel strategy for catalytic enhancement. While the exposed {001} facets may reduce carrier migration distances, further investigation is required to elucidate the anisotropic charge transport mechanisms.</div></div>","PeriodicalId":16782,"journal":{"name":"Journal of Photochemistry and Photobiology A-chemistry","volume":"467 ","pages":"Article 116445"},"PeriodicalIF":4.1,"publicationDate":"2025-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143864874","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}

{"title":"Facile photochemical construction of surface oxygen vacancies on polar BiOIO3 for enhanced CO2 photoreduction performance","authors":"Yumin Li ,&nbsp;Ying Lv ,&nbsp;Lei Wang ,&nbsp;Bo Wang ,&nbsp;Xuelian Chen ,&nbsp;Ge Zhang","doi":"10.1016/j.jphotochem.2025.116442","DOIUrl":"10.1016/j.jphotochem.2025.116442","url":null,"abstract":"<div><div>With the increase in global carbon emissions, environmental problems are becoming increasingly severe. Photocatalytic CO₂ reduction, as a green technology, holds promise for converting CO₂ into fuels and achieving carbon cycling, thus attracting much attention. The novel BiOIO₃ has a suitable band structure, high separation efficiency of photogenerated carriers, and strong CO₂ adsorption and activation capabilities, showing significant advantages in the field of photocatalytic CO₂ reduction. In this study, a defect engineering modification strategy for BiOIO₃ was carried out by means of ultraviolet light irradiation at room temperature and pressure. This achieved flexible regulation of the band structure of photo-induced oxygen vacancy containing BiOIO₃ and enhanced its photocatalytic CO₂ reduction performance. Through a series of experimental characterizations and DFT theoretical calculations, the formation mechanism of photo-induced oxygen vacancies and the electron transfer behavior of oxygen vacancies in the photocatalytic CO₂ reduction reaction were revealed. It was demonstrated that photo-induced oxygen vacancies can effectively improve the utilization efficiency of carriers and enhance CO₂ adsorption and activation. The research findings provide a new perspective for defect engineering in the design and application of energy conversion materials.</div></div>","PeriodicalId":16782,"journal":{"name":"Journal of Photochemistry and Photobiology A-chemistry","volume":"467 ","pages":"Article 116442"},"PeriodicalIF":4.1,"publicationDate":"2025-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143887726","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}

{"title":"Schiff-Base porous film for NO2 detection to Enable monitoring of solid propellant aging","authors":"Xueying Sun ,&nbsp;Lina Xie ,&nbsp;Wenlong Huo ,&nbsp;Kaifeng Lin ,&nbsp;Yulin Yang ,&nbsp;Xuhui Chi ,&nbsp;Chengyuan Zhao ,&nbsp;Fengtao Zhang ,&nbsp;Junzhuo Li ,&nbsp;Debin Xia ,&nbsp;Jian Zhang","doi":"10.1016/j.jphotochem.2025.116450","DOIUrl":"10.1016/j.jphotochem.2025.116450","url":null,"abstract":"<div><div>In this study, an organic molecular probe containing an imine (C=N) linkage was synthesized and embedded in a polymethylmethacrylate (PMMA)/polyethylene glycol (PEG) matrix to fabricate a porous optical film for NO₂ gas detection via solid-state UV spectroscopy. Upon exposure to NO₂, the film exhibited significant spectral changes, with a detection limit as low as 26.45 ppm. Mechanistic investigations revealed that NO₂ induced non-covalent interactions with the probe, triggering structural reorganization and enhanced π-conjugation. Density Functional Theory (DFT) calculations further supported these findings by confirming changes in electronic structure and energy levels. Additionally, preliminary tests demonstrated the feasibility of applying this probe film for the aging detection of NEPE propellants, offering a promising non-destructive approach for monitoring propellant health.</div></div>","PeriodicalId":16782,"journal":{"name":"Journal of Photochemistry and Photobiology A-chemistry","volume":"467 ","pages":"Article 116450"},"PeriodicalIF":4.1,"publicationDate":"2025-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143894775","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}

{"title":"Near-Infrared absorbing A–π–D–π–A small molecule Driven by simple intramolecular noncovalent Bonds for efficient organic solar cells with enhanced visible transmittance","authors":"Shabaz Alam ,&nbsp;Meng Qiang Li ,&nbsp;Seo-jin Ko ,&nbsp;Jaewon Lee","doi":"10.1016/j.jphotochem.2025.116449","DOIUrl":"10.1016/j.jphotochem.2025.116449","url":null,"abstract":"<div><div>Semitransparent organic solar cells are among the most promising solar cell technologies for applications in building-integrated photovoltaics (BIPV), agricultural greenhouses, and wearable energy harvesting, offering a balance between power conversion efficiency (PCE) and optical transparency. In this study, we designed and synthesized a cyclopentadithiophene (CPDT) core-based NIR absorbing NFA named CETIC for efficient organic solar cell with notably enhanced visible transparency. Employing a CPDT donor core with a 1-(dicyanomethylene)-3-indanone acceptor connected with a functional thiophene π-bridge potentially enhances the intramolecular interaction to achieve planar molecular geometry. The champion devices based on PM2:CETIC deliver an efficient PCE of 7.93 % with a Voc of 0.88 V, a Jsc of 15.52 mAcm², and a fill factor (FF) of 58 %. Our work reveals molecular design strategy by rationally establishing multiple strong noncovalent intramolecular interaction between donor and π-bridge to enhance the PCE and transparency for potential application in semitransparent organic solar cells.</div></div>","PeriodicalId":16782,"journal":{"name":"Journal of Photochemistry and Photobiology A-chemistry","volume":"467 ","pages":"Article 116449"},"PeriodicalIF":4.1,"publicationDate":"2025-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143860686","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}

{"title":"Time-tunable white light emission in waterborne colloidal smart polymer-MXene quantum dots for high-level anticounterfeiting","authors":"Samaneh Isapour ,&nbsp;Milad Babazadeh-Mamaqani ,&nbsp;Hossein Roghani-Mamaqani ,&nbsp;Arman Motalebnejad-Mamaqani ,&nbsp;Amir Rezvani-Moghaddam ,&nbsp;Hossein Riazi ,&nbsp;Mehdi Salami-Kalajahi ,&nbsp;Masoud Soroush","doi":"10.1016/j.jphotochem.2025.116446","DOIUrl":"10.1016/j.jphotochem.2025.116446","url":null,"abstract":"<div><div>The aqueous dispersion of MXene quantum dots (MQDs) is a precursor for white light-emitting colloidal polymer particles. This study presents a method of synthesizing Ti₃C₂T<em>_x</em> MQDs with a uniform size distribution and customizable optical properties. The MQDs—doped with ethylenediamine, sulfuric acid, and thiourea that have nitrogen, sulfur, and both of nitrogen and sulfur groups, respectively—exhibit a high-intensity emission across the blue to red spectra. The incorporation of spiropyran-doped poly(methyl methacrylate) nanoparticles (SPPMMANPs) into the MQDs—via reverse ATRP and nanoprecipitation in MQDs aqueous dispersions—leads to dynamically adjustable white light emission, controlled by the fluorescence resonance energy transfer mechanism. The emission color changed from blue to white and then to red with increased concentrations of the organic phase and duration of UV irradiation. An ink made of the SPPMMANPs/thiourea-doped MQDs displays Commission Internationale de l’Eclairage (CIE) color coordinates of (0.3234, 0.3303), a color temperature of 5450 K, a color rendering index of 87, and the highest emission overlap with the sunlight visible range. These economical and waterborne inks with dynamically adjustable white light emission have applications in secured quick response codes, tracking and tracing systems, fingerprint decryption, digital watermarks, and white light-emitting diodes.</div></div>","PeriodicalId":16782,"journal":{"name":"Journal of Photochemistry and Photobiology A-chemistry","volume":"467 ","pages":"Article 116446"},"PeriodicalIF":4.1,"publicationDate":"2025-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143878952","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}

{"title":"Corrigendum to “Tactfully regulating the ESIPT mechanism in the Cyanine-n probe molecules by electron withdrawing substitutions” [J. Photochem. Photobiol. A: Chem. 467 (2025) 116425]","authors":"Min Yang,&nbsp;Xiaonan Wang,&nbsp;Hongyan Mu,&nbsp;Yifu Zhang,&nbsp;Hui Li","doi":"10.1016/j.jphotochem.2025.116443","DOIUrl":"10.1016/j.jphotochem.2025.116443","url":null,"abstract":"","PeriodicalId":16782,"journal":{"name":"Journal of Photochemistry and Photobiology A-chemistry","volume":"467 ","pages":"Article 116443"},"PeriodicalIF":4.1,"publicationDate":"2025-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143923384","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}

{"title":"Aggregation-induced emission of silver nanoclusters induced by Li+ for white light emitting diodes","authors":"Xiaoli Ji ,&nbsp;Juan Qiu ,&nbsp;Yunya He ,&nbsp;Na Zhang ,&nbsp;Xia Xin ,&nbsp;Xingwei Luo","doi":"10.1016/j.jphotochem.2025.116444","DOIUrl":"10.1016/j.jphotochem.2025.116444","url":null,"abstract":"<div><div>Because of the increasingly depleted global resources, light-emitting diodes (LEDs) have emerged as one of the most appealing lighting systems, among which metal nanoclusters (NCs) are regarded as one of the most promising phosphors for color conversion in LEDs. However, dispersed metal NCs often exhibit drawbacks such as low emission intensity, which can be remedied by aggregation-induced emission (AIE) induced by self-assembly strategy. In this study, based on a water-soluble silver NCs (((NH₄)₉[Ag₉(mba)₉], H₂mba = 2-mercaptobenzoic acid, hereafter referred to as Ag₉ NCs) with atomically precise structure, the precipitation of yellow nanorods with strong luminescence is generated under Li⁺ coordination for the first time. Compared to Ag₉ NCs, the Ag₉ NCs/LiNO₃ composites demonstrate significantly enhanced luminescence performance, realizing an increase in quantum yield from zero to substantial levels (7.8%) and achieving a large Stokes shift of 262 nm, which is much larger than the Stokes shift of Ag₉ NCs composite materials reported in most articles (160 nm). Furthermore, the fluorescence lifetime has been extended by 254 times, from 3.2 ns to 834.7 ns, the long lifetime and large Stokes shift imply that it is phosphorescence emission. Due to its exceptionally strong photoluminescence intensity, it can be mixed with the commercial phosphor for used as a white phosphor. The study shows that the superior optical qualities of Ag₉ NCs/LiNO₃ composites are of great application value in the manufacture of white LEDs, which opens a wider range of potential uses for Ag NC in the optical device industry.</div></div>","PeriodicalId":16782,"journal":{"name":"Journal of Photochemistry and Photobiology A-chemistry","volume":"467 ","pages":"Article 116444"},"PeriodicalIF":4.1,"publicationDate":"2025-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143847738","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}