Journal of Photochemistry and Photobiology A-chemistry最新文献

{"title":"Asymmetric fluorinated 2,3-bis(5-arylthiophen-2-yl)quinoxalines: Synthesis and photophysical properties","authors":"Alexandra E. Kopotilova ,&nbsp;Marya A. Ivan’kina ,&nbsp;Ekaterina S. Starnovskaya ,&nbsp;Tatyana N. Moshkina ,&nbsp;Denis A. Gazizov ,&nbsp;Ilya N. Ganebnykh ,&nbsp;Emiliya V. Nosova ,&nbsp;Valery N. Charushin","doi":"10.1016/j.jphotochem.2024.116161","DOIUrl":"10.1016/j.jphotochem.2024.116161","url":null,"abstract":"<div><div>A series of novel 6-fluoro- and 6-trifluoromethyl-2,3-bis(5-arylthiophen-2-yl)quinoxalines was synthesized via Pd-catalyzed cross-coupling reactions. Their photophysical properties were studied in solutions of fluorophores in toluene, THF, and MeCN, as well as in the solid state. These V-shaped quinoxalines exhibited a low-energy absorption band ranging from 394 to 457 nm and emitted light in the broad region from green to orange in toluene. Notably, the absorption and emission bands of 6-CF₃-substituted quinoxalines shifted towards the red region compared to their 6-fluoro analogues. While solvent polarity had negligible effects on the absorption band, it significantly influenced the emission band, causing a pronounced red-shift and attenuating its intensity. The obtained properties were compared with those of related structures, and structure-photophysical property relationships were examined. Furthermore, the effect of external stimuli, including acidity, the presence of water, and nitroaromatic compounds, on the absorption and emission behaviors was evaluated. Finally, electronic-structure calculations based on quantum-chemical methods were conducted to provide insights into the experimental findings.</div></div>","PeriodicalId":16782,"journal":{"name":"Journal of Photochemistry and Photobiology A-chemistry","volume":"461 ","pages":"Article 116161"},"PeriodicalIF":4.1,"publicationDate":"2024-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142704257","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":"CO2 photo-reduction with polyoxometalates-porphyrin based COF: A deep dive into spectroscopy and thermal behavior","authors":"Taghrid S. Alomar ,&nbsp;Babar Ali Tayyab ,&nbsp;Muhammad Nadeem ,&nbsp;Najla AlMasoud ,&nbsp;Amal A. Al-wallan ,&nbsp;Hafiz Muhammad Asif ,&nbsp;Zeinhom M. El-Bahy","doi":"10.1016/j.jphotochem.2024.116171","DOIUrl":"10.1016/j.jphotochem.2024.116171","url":null,"abstract":"<div><div>The reduction of carbon dioxide (CO₂) to valuable fuels is crucial for mitigating the climate change and developing the sustainable energy sources. This study explored the use of photo catalyst namely ZnADCOF@MnTP containing metalloporphyrin and χ-Anderson polyoxometalates (POMs) for CO₂ reduction. This is clearly demonstrated that ZnADCOF@MnTP exhibited significant changes in its environment after interaction with CO₂, as evidenced by shift in spectra of FT-IR (Fourier Transform infrared spectroscopy), UV–visible (Ultra-violet visible spectroscopy), and Raman spectra, along with TGA (Thermogravimetric analysis), and DSC (Differential scanning calorimetric) analysis. These changes indicate the formation of new carbon containing species, and modifications in its oxidation state. ZnADCOF@MnTP showed a remarkable reduction in thermal stability upon interaction with CO₂, which is due to its enhanced photocatalytic activity, and also indicated that adsorption, has been occurred. CO₂ adsorption and desorption capacities for ZnADCOF@MnTP has also been studied to analyze the adsorption and desorption capacities of the ZnADCOF@MnTP for fresh and regenerated catalyst. The maximum amount of CO₂ that has been adsorbed, by ZnADCOF@MnTP is found to be 2.045 (mmol/g) and desorbed capacity is found to be 30 %. GC–MS spectra showed the reduction of CO₂ to methanol and formic acid with 0.16 %, and 0.09 % relative concentration which inferred that the ZnADCOF@MnTP is more selective for photoreduction of CO₂ to methanol as compared to formic acid.</div></div>","PeriodicalId":16782,"journal":{"name":"Journal of Photochemistry and Photobiology A-chemistry","volume":"461 ","pages":"Article 116171"},"PeriodicalIF":4.1,"publicationDate":"2024-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142703216","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":"Quinolino[1,2-a]quinolinium bromide and isoquinolino[2,1-a]quinolinium bromide derivatives as DNA ligands and photocytotoxic agents","authors":"Polina S. Perevozchikova,&nbsp;Ekaterina Y. Chernikova,&nbsp;Yuri V. Fedorov,&nbsp;Olga A. Fedorova","doi":"10.1016/j.jphotochem.2024.116163","DOIUrl":"10.1016/j.jphotochem.2024.116163","url":null,"abstract":"<div><div>Photopharmacology is one of the promising fields of research that allows activating various biochemical processes using light. This article describes the photoirradiation of styrylquinoline and styrylisoquinoline derivatives in aqueous solution and in MeCN resulting in the formation of the corresponding substituted quinolino[1,2-a]quinolinium or isoquinolino[2,1-a]quinolinium compounds. The obtained quinolinium derivatives bind to DNA by intercalation, whereas styrylquinoline and styrylisoquinoline form aggregates in DNA template as shown by photometric and fluorimetric titrations as well as by CD-spectroscopic analyses. The quinolinium ligands-DNA complexes can also be established <em>in situ</em> upon irradiation of styrylquinoline and styrylisoquinoline derivatives and the formation of intercalators directly in the presence of DNA. In addition to the DNA-binding properties, the tested quinolino[1,2-a]quinolinium and isoquinolino[2,1-a]quinolinium derivatives also operate as photosensitizers. They induce DNA damage at relatively low concentrations, even under anaerobic conditions, and therefore can be considered a potential platform for the development of type I PDT agents.</div></div>","PeriodicalId":16782,"journal":{"name":"Journal of Photochemistry and Photobiology A-chemistry","volume":"461 ","pages":"Article 116163"},"PeriodicalIF":4.1,"publicationDate":"2024-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142748734","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":"LaSrO3 perovskite quantum dots as a fluorescent probe for the detection of bilirubin and epinephrine via FRET and IFE mechanisms","authors":"Kartik Pankajbhai Makwana ,&nbsp;Madhura Pradeep Deshpande ,&nbsp;Naved I. Malek ,&nbsp;Tae Jung Park ,&nbsp;Suresh Kumar Kailasa","doi":"10.1016/j.jphotochem.2024.116172","DOIUrl":"10.1016/j.jphotochem.2024.116172","url":null,"abstract":"<div><div>In this study, blue-emitting LaSrO₃ perovskite quantum dots (PQDs) were synthesized using a microwave-assisted sol–gel method. The as-prepared LaSrO₃ PQDs acted as a nano-fluorescent probe for detection of two biomarkers: bilirubin (BR) and epinephrine (EP). The fluorescence spectra of LaSrO₃ PQDs showed λ_Em/Ex at 421/336 nm, displaying quantum yield of 36.91 %. Based on the remarkable fluorescence properties of LaSrO₃ PQDs, fluorescence sensing studies were performed for biomarkers assay. The emission spectral results of LaSrO₃ PQDs displayed remarkable fluorescence quenching by BR and EP via Förster resonance energy transfer and inner filter effect, respectively. The detection limits were 10.48 and 17.04 nM for BR and EP, respectively. The fluorescence quenching mechanisms were discussed in detail by various analytical techniques (fluorescence, UV–visible absorption, transmission electron microscopy, Fourier transform infrared, and zeta potential). In addition, LaSrO₃ PQDs-based fluorescence sensing approach was successfully applied to quantitative assays of EP in pharmaceutical samples and of BR in biofluids with satisfactory recovery results.</div></div>","PeriodicalId":16782,"journal":{"name":"Journal of Photochemistry and Photobiology A-chemistry","volume":"461 ","pages":"Article 116172"},"PeriodicalIF":4.1,"publicationDate":"2024-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142703215","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":"The role of conformation states in the heterogeneity of fluorescence decay times in FAD in water–alcohol mixtures","authors":"Denis A. Volkov ,&nbsp;Ioanna A. Gorbunova ,&nbsp;Dmitrii V. Yashkov ,&nbsp;Maxim E. Sasin ,&nbsp;Maria G. Khrenova ,&nbsp;Oleg S. Vasyutinskii","doi":"10.1016/j.jphotochem.2024.116155","DOIUrl":"10.1016/j.jphotochem.2024.116155","url":null,"abstract":"<div><div>We present the results of experimental and theoretical studies of excited state dynamics of flavin adenine dinucleotide (FAD) in water–methanol and water–ethanol mixtures as a function of alcohol concentration. The experimental studies have been carried out by recording time-resolved polarized fluorescence in FAD after excitation with short laser pulses using the time-correlated single photon counting method. The results obtained have shown that in aqueous solution fluorescence decay in FAD could be presented as a sum of four exponents with decay times of 20 ps, 210 ps, 2.70 ns, and 3.85 ns. Addition of methanol, or ethanol only insignificantly affected the decay time values, however caused dramatic changes in the contributions of the exponents to the fluorescence decay signal. Molecular dynamics (MD) simulations and QM/MM calculations in water–methanol and water–ethanol mixtures have been carried out and revealed the existence of three distinct conformation groups of FAD: Stack I, Stack III, and Open, which differ by mutual positions of the adenine and isoalloxazine rings and interaction between them. A model has been developed for elucidation of the excited state dynamics in FAD and of the nature of the heterogeneity of the recorded fluorescence decay times. The model classifies several relaxation channels in FAD after excitation by short laser pulses and suggests that the sub-nanosecond decay times of 20 ps and 210 ps both reflect fast fluorescence quenching due to electron transfer reactions in the vicinity of a conical intersection in the Stack III and Stack I conformations of FAD. The Stack I conformation is mostly stabilized by intramolecular forces due to <span><math><mi>π</mi></math></span>-stacking interactions between the adenine and isoalloxazine rings and internal hydrogen bonds, while the Stack III conformation is stabilized to a large extent by hydrogen bonds with external water molecules. It was also suggested that the nanosecond decay times of 2.70 and 3.85 ns were governed mostly by relatively weak non-radiative decay channels from the bottom of the lowest excited electronic state either via direct relaxation to the ground state, or via tunneling to a redox-pair excited state through potential barrier. The decay time of 2.70 ns was shown to refer mainly to folded conformations and the decay time of 3.85 ns to open conformations.</div></div>","PeriodicalId":16782,"journal":{"name":"Journal of Photochemistry and Photobiology A-chemistry","volume":"461 ","pages":"Article 116155"},"PeriodicalIF":4.1,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142703223","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":"La3+ doped ZnFe2O4 synthesized via green chemistry approach using Uncaria gambir Roxb: A study on structural, optical, magnetic, and photocatalytic properties","authors":"Zulhadjri ,&nbsp;Nurul Pratiwi ,&nbsp;Yulia Eka Putri ,&nbsp;Rahmayeni ,&nbsp;Nandang Mufti ,&nbsp;Ramli ,&nbsp;Vienna Saraswaty ,&nbsp;Suriati Sufian","doi":"10.1016/j.jphotochem.2024.116168","DOIUrl":"10.1016/j.jphotochem.2024.116168","url":null,"abstract":"<div><div>Lanthanum-doped zinc ferrite (ZFLa) nanoparticles were synthesized via a hydrothermal method, utilizing <em>Uncaria gambir Roxb</em> leaf extract as a capping and stabilizing agent. X-ray diffraction (XRD) and Le Bail refinement confirmed a cubic spinel structure formation with an <em>Fd-3m</em> space group. Fourier-transform infrared spectroscopy (FTIR) analysis indicated a shift of the vibration mode of the tetrahedral site to a higher frequency with increasing lanthanum concentration. Raman spectroscopy revealed an additional peak in the A_1g mode at 605 cm⁻¹ for ZnFe₁_.₉La₀_.₁O₄ (ZFLa10), suggesting the formation of an inverse spinel structure due to a complex cation distribution at the tetrahedral sites. Scanning electron microscopy (SEM) showed that all samples exhibited spherical grains at the nanoscale, with particle size decreasing as lanthanum concentration increased. UV–Vis diffuse reflectance spectroscopy (DRS) indicated band gap energies within the visible light range (1.84 to 1.86 eV). Brunauer-Emmett-Teller (BET) analysis confirms the increased surface area and pore diameter due to the introduction of La³⁺ ions, the specific surface area and pore diameter were 96.76 m²/g and 8.78 nm for ZFLa0, and 106.21 m²/g and 10.49 nm for ZFLa10, respectively. The adsorption percentage increased from 17.59 % for ZFLa0 to 55.56 % for ZFLa10. Photocatalytic investigations demonstrated that all catalysts exhibited good activity in degrading Direct Red 81 dye, with ZFLa10 showing the highest photocatalytic activity under direct sunlight, achieving up to 99.68 % degradation of the dye. Stability tests demonstrated remarkable durability, with ZFLa10 maintaining 90.20 % degradation efficiency after five cycles, establishing it as an excellent photocatalyst candidate.</div></div>","PeriodicalId":16782,"journal":{"name":"Journal of Photochemistry and Photobiology A-chemistry","volume":"461 ","pages":"Article 116168"},"PeriodicalIF":4.1,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142703214","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":"Sky-blue tri-cyclometalated heteroleptic iridium (III) phosphors: Influence of ancillary ligand","authors":"Ruijuan Yao ,&nbsp;Xiaoxiao Hu ,&nbsp;Qingzhe Meng ,&nbsp;Jiuyan Li ,&nbsp;Di Liu ,&nbsp;Yanfang Zhu ,&nbsp;Yuzhen Zhao ,&nbsp;Zemin He","doi":"10.1016/j.jphotochem.2024.116170","DOIUrl":"10.1016/j.jphotochem.2024.116170","url":null,"abstract":"<div><div>Two sky-blue tri-cyclometalated heteroleptic iridium complexes with the Ir(C^N)₂(C₁^N₁) framework, namely M₁ and M₂, were developed with (3,5-bis(trifluoromethyl)phenyl)pyridine (cf₃ppy) as the main cyclometalating ligand and 3-(1-benzyl-1H-1,2,3-triazol-4-yl)pyridine (pt) or 2′,6′-difluoro-2,3′-bipyridine (dfbpy) as the ancillary cyclometalating ligand. The effect of the C₁^N₁ ancillary ligand on the photophysical, thermal, electrochemical properties as well as the device performances were studied comparatively. It was revealed that the ancillary ligand pt favored to suppress the longer-wavelength vibronic band intensity and thus enhanced the blue color purity of the tris-cyclometalated iridium complex M₁. Sky-blue phosphorescent organic light-emitting diodes (OLEDs) were fabricated with these iridium phosphors as doped emitter. The M₁-based OLED exhibited better performance with improved color purity and reduced intensity at long-wavelength vibronic band, and a maximum current efficiency and external quantum efficiency of 28.2 cd/A and 12.5 %. This study provides a valid molecular design strategy to control the intensity of the shoulder vibronic sub-band for optimized color purity of cyclometalated iridium phosphors.</div></div>","PeriodicalId":16782,"journal":{"name":"Journal of Photochemistry and Photobiology A-chemistry","volume":"461 ","pages":"Article 116170"},"PeriodicalIF":4.1,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142703213","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":"Acoustic cavitation assisted synthesis of PCDs@PVA composite film for UV shielding, intelligent pH detection, information encryption and food packing applications","authors":"D.H. Sandeep ,&nbsp;B.R. Radha Krushna ,&nbsp;S.C. Sharma ,&nbsp;Srikant Sahoo ,&nbsp;C. Sridhar ,&nbsp;Ambrose Rajkumar ,&nbsp;K. Manjunatha ,&nbsp;Sheng Yun Wu ,&nbsp;V.R. Hemanth Kumar ,&nbsp;A. Arulmozhi ,&nbsp;H. Nagabhushana","doi":"10.1016/j.jphotochem.2024.116162","DOIUrl":"10.1016/j.jphotochem.2024.116162","url":null,"abstract":"&lt;div&gt;&lt;div&gt;Excessive exposure to UV and high-energy blue light (HEBL) can severely damage the skin and eyes. Therefore, it is essential to protect our bodies from UV and HEBL radiation. We created PEG-derived carbon dots (PCDs) using the acoustic cavitation approach in order to completely block UV and HEBL. The influence of different experimental parameters such as sonication time, amplitude, and temperature on the PCDs is examined. The optimized PCDs are found to have an average diameter ranging from 5 to 9 nm, contingent upon the preparation circumstances, and to have a quantum yield (QY) of 14–16 %. The PCDs vivid colour and simultaneous UV and HEBL absorption properties allowed the PVA film containing 0.120 wt% of PCDs to demonstrate outstanding blocking efficiency, with 99.9 % blocking in HEBL and 100 % blocking in UV-C, UV-B, and UV-A. The photoluminescence (PL) behaviour of PCDs is greatly reduced by Fe&lt;sup&gt;3+&lt;/sup&gt; ions because of strong excited state electron transfer. This fluorescent “turn-off” behaviour towards Fe&lt;sup&gt;3+&lt;/sup&gt; is highly selective and sensitive with a limit of detection (LoD) of 0.366 μM. Paper-based sensors incorporating PCDs are developed for the rapid and accurate detection of Fe&lt;sup&gt;3+&lt;/sup&gt; in surface water, wastewater treatment plant effluent, and tap water, leveraging their excellent sensitivity and selectivity towards Fe&lt;sup&gt;3+&lt;/sup&gt;. The characteristics of ink-free patterned substrates are displayed by PCDs scattered across a PVA matrix, which makes them useful for the non-destructive acquisition and recognition of latent fingerprints (LFPs). A flexible, transparent film is produced when a LFP is exposed to a PCDs@PVA solution. In this film, a steady luminous fingerprint with specific ridge characteristics that aid in personal recognition is seen. This method shows promise for lifting and identifying long-exposed LFPs from various surfaces without causing damage. It is believed that the interfacial segregation of PCDs inside the PVA matrix during the film production process serves as a mechanism for LFP collection and visualization. The &lt;em&gt;YOLOv8x&lt;/em&gt; program, which utilizes deep convolutional neural networks, is employed to analyze the discernible features present in fingerprints (FPs). Notably, their exceptional flexibility, foldability, and sustainability create new opportunities for use in the anti-counterfeiting (AC) field. Because of its remarkable fluorescence stability, it may be a viable substitute for conventional fluorescent inks. Fresh green apples are observed over time after being coated with 0.120 wt% PCDs@PVA and PVA. Virtual assessments indicated that the 0.120 wt% PCDs@PVA film coating significantly reduced weight and moisture loss, effectively inhibiting fungal growth and spoilage for over 25 days at room temperature (RT). Overall, the results clearly show that the PCDs@PVA film is easy to make, flexible, safe for the environment, and resistant to photodegradation. Hemolysis, and blood clot","PeriodicalId":16782,"journal":{"name":"Journal of Photochemistry and Photobiology A-chemistry","volume":"461 ","pages":"Article 116162"},"PeriodicalIF":4.1,"publicationDate":"2024-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142703222","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":"One–pot green synthesis of TiO2 nanoparticles using Inula Viscosa leaf extract as an efficient photocatalyst for organic dyes removal","authors":"Nassiba Moghni ,&nbsp;Hussein Khalaf ,&nbsp;Omar Menseri ,&nbsp;Hocine Boutoumi ,&nbsp;Racha Boudali ,&nbsp;Feriel Dif ,&nbsp;Youcef Boucheffa","doi":"10.1016/j.jphotochem.2024.116158","DOIUrl":"10.1016/j.jphotochem.2024.116158","url":null,"abstract":"<div><div>In this research, TiO₂ nanoparticles (TiO₂-NPs) were prepared via a green synthesis using <em>Inula Viscosa</em> aqueous extract, which has not been stated for the preparation of TiO₂-based nanomaterials. Different calcination temperatures (400, 500, and 600 °C) were used to examine their effect on the properties and the photoactivity of TiO₂. Multiple characterization methods were employed to assess the different features of the prepared materials. The detected phenolic compounds in the investigated plant through the phytochemical analysis acted as a capping agent that has a vital role in the development of nanosized TiO₂ oxide. According to the structural analysis, the obtained nanoparticles have a consistent distribution over the sample surface and are about 9–18 nm in size. Results also confirmed the occurrence of pure anatase phase TiO₂ nanoparticles at all calcination temperatures. The photoactivity was analyzed for the degradation of methylene blue and tartrazine organic dyes. TiO₂-NPs calcined at 500 °C exhibited the best photocatalytic performances where a complete removal efficiency (100 %) toward both pollutants was achieved in only 60 min of UV irradiation. As a photocatalyst, the synthesized TiO₂-NPs outperformed many of the greenly reported nanomaterials in literature.</div></div>","PeriodicalId":16782,"journal":{"name":"Journal of Photochemistry and Photobiology A-chemistry","volume":"461 ","pages":"Article 116158"},"PeriodicalIF":4.1,"publicationDate":"2024-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142704319","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":"Design and fabrication of double heterojunctions of WO3/BiVO4/Cu2O photoanode for photoelectrochemical water splitting","authors":"Shiyu Jia ,&nbsp;Yanling Fang ,&nbsp;Ziyang Liu ,&nbsp;Ke Tian ,&nbsp;Xiangbo Zhao ,&nbsp;Shouli Bai","doi":"10.1016/j.jphotochem.2024.116156","DOIUrl":"10.1016/j.jphotochem.2024.116156","url":null,"abstract":"<div><div>To overcome the shortcoming of photon-generated electrons and holes recombination for WO₃ photoanode in photoelectrochemical (PEC) water splitting, WO₃/BiVO₄/Cu₂O n-n-p double heterojunction photoanode was designed and prepared by a simple drop-casting method and electrodeposition, which can enhance the photoelectrochemical performance of the WO₃ photoanode due to the successful constructions of the type II heterojunctions. The ternary photoanode increased the photocurrent density from 0.50 mA·cm⁻² for WO₃ photoanode at 1.23 V (vs. RHE) to 5.00 mA·cm⁻² for WO₃/BiVO₄/Cu₂O photoanode. Compared with WO₃ photoanode, the visible light absorption range of the WO₃/BiVO₄/Cu₂O photoanode is expanded (verified in the UV–vis absorption curve) and the utilization efficiency of visible light is significantly improved. The mechanism of PEC process is also discussed in detail, which is attributed to the fact that the carrier separation efficiency is greatly improved by the migration of photogenerated electrons and holes in opposite directions at the double heterojunctions interface.</div></div>","PeriodicalId":16782,"journal":{"name":"Journal of Photochemistry and Photobiology A-chemistry","volume":"461 ","pages":"Article 116156"},"PeriodicalIF":4.1,"publicationDate":"2024-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142704251","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}