Journal of Photochemistry and Photobiology A-chemistry最新文献

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Enhanced g-C3N4 photocatalytic removal of tetracycline under visible light: Synergistic effect of N vacancies and Ni, Zr co-doping

IF 4.1 3区化学 Q2 CHEMISTRY, PHYSICAL

Journal of Photochemistry and Photobiology A-chemistry

Pub Date : 2025-01-28 DOI: 10.1016/j.jphotochem.2025.116308

Peng Wang , Haitao Ren , Xinheng Yu , Jianmin Luo , Bin Liu , Abdukader Abdukayum

Inhibiting the recombination of photo-generated charge carriers is crucial for improving the photocatalytic performance of materials. In this study, we ingeniously proposed a Ni, Zr co-doped graphite carbon nitride catalyst (CNNZ-x) with rich N vacancies (Vs). The analysis of the system shows that Ni, Zr co-doping and N Vs provide multiple channels for electron transfer, greatly promoting the efficient separation of photogenerated charges, promoting the generation of active species, and accelerating the degradation of TC. As a result, the optimized CNNZ1.2 almost completely removes TC within 30 min under visible light (λ ≥ 420 nm), with a corresponding first-order rate constant (k) of 0.2097 min⁻¹, which is 9.71 times higher than pure CN (k = 0.0216 min⁻¹). This TC removal performance is significantly higher than other CN-based photocatalysts reported in the literature. Furthermore, the CNNZ1.2 exhibits good cycling stability and adaptability under real-water conditions. The intermediates and three removal pathways of TC were analyzed by LC-MS and Fukui function. The E. coli culture experiment showed that the TC solution treated with CNNZ1.2 photocatalysis is almost non-toxic and does not cause secondary pollution to the water environment. These findings provide new insights into the design of CN-based photocatalysts and their efficient purification of antibiotic pollutants.

{"title":"Enhanced g-C3N4 photocatalytic removal of tetracycline under visible light: Synergistic effect of N vacancies and Ni, Zr co-doping","authors":"Peng Wang , Haitao Ren , Xinheng Yu , Jianmin Luo , Bin Liu , Abdukader Abdukayum","doi":"10.1016/j.jphotochem.2025.116308","DOIUrl":"10.1016/j.jphotochem.2025.116308","url":null,"abstract":"<div><div>Inhibiting the recombination of photo-generated charge carriers is crucial for improving the photocatalytic performance of materials. In this study, we ingeniously proposed a Ni, Zr co-doped graphite carbon nitride catalyst (CNNZ-x) with rich N vacancies (Vs). The analysis of the system shows that Ni, Zr co-doping and N Vs provide multiple channels for electron transfer, greatly promoting the efficient separation of photogenerated charges, promoting the generation of active species, and accelerating the degradation of TC. As a result, the optimized CNNZ1.2 almost completely removes TC within 30 min under visible light (λ ≥ 420 nm), with a corresponding first-order rate constant (<em>k</em>) of 0.2097 min<sup>−1</sup>, which is 9.71 times higher than pure CN (<em>k</em> = 0.0216 min<sup>−1</sup>). This TC removal performance is significantly higher than other CN-based photocatalysts reported in the literature. Furthermore, the CNNZ1.2 exhibits good cycling stability and adaptability under real-water conditions. The intermediates and three removal pathways of TC were analyzed by LC-MS and Fukui function. The <em>E. coli</em> culture experiment showed that the TC solution treated with CNNZ1.2 photocatalysis is almost non-toxic and does not cause secondary pollution to the water environment. These findings provide new insights into the design of CN-based photocatalysts and their efficient purification of antibiotic pollutants.</div></div>","PeriodicalId":16782,"journal":{"name":"Journal of Photochemistry and Photobiology A-chemistry","volume":"464 ","pages":"Article 116308"},"PeriodicalIF":4.1,"publicationDate":"2025-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143157978","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

Effect of Mg0.71Zn0.29O electron transport layer on violet/blue emission of CsPbCl3 LED

IF 4.1 3区化学 Q2 CHEMISTRY, PHYSICAL

Journal of Photochemistry and Photobiology A-chemistry

Pub Date : 2025-01-28 DOI: 10.1016/j.jphotochem.2025.116309

Weifang Zhang, Shenwei Wang, Zhengmao Wen, Qingxue Zhao, Lixin Yi

In this study, the electron transport layer Mg_0.71Zn_0.29O was deposited using magnetron sputtering in a violet/blue CsPbCl₃ light-emitting diode (LED) device. Apart from facilitating electron transfer, a crucial aspect was hole blocking. The high crystallinity of Mg_0.71Zn_0.29O not only maintained the grain size of CsPbCl₃ films but also enhanced their crystalline quality. The crystal quality of the luminescent layer played a vital role in the performance of the subsequent devices. The valence band top and conduction band bottom energies of Mg_0.71Zn_0.29O were determined to be −9.87 eV and −4.45 eV respectively, which matched with the luminescent layer energy level. Energy level matching is the key to manufacturing efficient LED. Ultimately, an optimal thickness of 9 nm for Mg_0.71Zn_0.29O resulted in the highest electroluminescence (EL) intensity at a driving voltage of 8 V. Devices incorporating Mg_0.71Zn_0.29O exhibited significantly enhanced EL compared to those without it. This improvement was attributed to the effective inhibition of hole injection into the electron transport layer by the lower valence band level of Mg_0.71Zn_0.29O, thereby increasing carrier recombination likelihood. The violet/blue EL spectrum position of the device was 409 nm, the full width at half maximum was only 9.7 nm, and it had excellent luminescence monochromaticity.

{"title":"Effect of Mg0.71Zn0.29O electron transport layer on violet/blue emission of CsPbCl3 LED","authors":"Weifang Zhang, Shenwei Wang, Zhengmao Wen, Qingxue Zhao, Lixin Yi","doi":"10.1016/j.jphotochem.2025.116309","DOIUrl":"10.1016/j.jphotochem.2025.116309","url":null,"abstract":"<div><div>In this study, the electron transport layer Mg<sub>0.71</sub>Zn<sub>0.29</sub>O was deposited using magnetron sputtering in a violet/blue CsPbCl<sub>3</sub> light-emitting diode (LED) device. Apart from facilitating electron transfer, a crucial aspect was hole blocking. The high crystallinity of Mg<sub>0.71</sub>Zn<sub>0.29</sub>O not only maintained the grain size of CsPbCl<sub>3</sub> films but also enhanced their crystalline quality. The crystal quality of the luminescent layer played a vital role in the performance of the subsequent devices. The valence band top and conduction band bottom energies of Mg<sub>0.71</sub>Zn<sub>0.29</sub>O were determined to be −9.87 eV and −4.45 eV respectively, which matched with the luminescent layer energy level. Energy level matching is the key to manufacturing efficient LED. Ultimately, an optimal thickness of 9 nm for Mg<sub>0.71</sub>Zn<sub>0.29</sub>O resulted in the highest electroluminescence (EL) intensity at a driving voltage of 8 V. Devices incorporating Mg<sub>0.71</sub>Zn<sub>0.29</sub>O exhibited significantly enhanced EL compared to those without it. This improvement was attributed to the effective inhibition of hole injection into the electron transport layer by the lower valence band level of Mg<sub>0.71</sub>Zn<sub>0.29</sub>O, thereby increasing carrier recombination likelihood. The violet/blue EL spectrum position of the device was 409 nm, the full width at half maximum was only 9.7 nm, and it had excellent luminescence monochromaticity.</div></div>","PeriodicalId":16782,"journal":{"name":"Journal of Photochemistry and Photobiology A-chemistry","volume":"463 ","pages":"Article 116309"},"PeriodicalIF":4.1,"publicationDate":"2025-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143142930","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 near-infrared-activatable polyvinyl alcohol/chitosan composite hydrogel for efficient synergistic bacteria-killing

IF 4.1 3区化学 Q2 CHEMISTRY, PHYSICAL

Journal of Photochemistry and Photobiology A-chemistry

Pub Date : 2025-01-28 DOI: 10.1016/j.jphotochem.2025.116310

Jinzhao Shu , Zhiguo Hou , Yuqi Zhang , Xueyi Dong , Yue Zhang , Qiangwei Liu , Shijun Kang , Mingliang Liu , Sen Wang , Bin Yang , Jiasheng Qian

In this paper, PVA/CS/CuS-based antibacterial hydrogel was prepared by a simple method. The CuS-based particles were characterized using zeta potentiometers, X-ray diffraction, X-ray photoelectron spectroscopy, transmission electron microscopy, and scanning electron microscopy. These analyses verified the successful synthesis of CuS@PDA and CuS@PDA@Ag particles. The composite hydrogel exhibited good photothermal effect and antibacterial activity, with silver doping significantly improving its photocatalytic performance. Under 808 nm near-infrared light irradiation, the hydrogel exhibited excellent photothermal conversion ability, with the maximum temperatures of the three hydrogels being 59.2 °C, 61.5 °C, and 64.8 °C, respectively. After 10-minute irradiation, the composite hydrogel exhibited obvious antibacterial activity due to the synergistic effect of hyperthermia and reactive oxygen species, resulting in a bactericidal efficiency of 96.2 % against E. coli and 98.4 % against S. aureus.

{"title":"A near-infrared-activatable polyvinyl alcohol/chitosan composite hydrogel for efficient synergistic bacteria-killing","authors":"Jinzhao Shu , Zhiguo Hou , Yuqi Zhang , Xueyi Dong , Yue Zhang , Qiangwei Liu , Shijun Kang , Mingliang Liu , Sen Wang , Bin Yang , Jiasheng Qian","doi":"10.1016/j.jphotochem.2025.116310","DOIUrl":"10.1016/j.jphotochem.2025.116310","url":null,"abstract":"<div><div>In this paper, PVA/CS/CuS-based antibacterial hydrogel was prepared by a simple method. The CuS-based particles were characterized using zeta potentiometers, X-ray diffraction, X-ray photoelectron spectroscopy, transmission electron microscopy, and scanning electron microscopy. These analyses verified the successful synthesis of CuS@PDA and CuS@PDA@Ag particles. The composite hydrogel exhibited good photothermal effect and antibacterial activity, with silver doping significantly improving its photocatalytic performance. Under 808 nm near-infrared light irradiation, the hydrogel exhibited excellent photothermal conversion ability, with the maximum temperatures of the three hydrogels being 59.2 °C, 61.5 °C, and 64.8 °C, respectively. After 10-minute irradiation, the composite hydrogel exhibited obvious antibacterial activity due to the synergistic effect of hyperthermia and reactive oxygen species, resulting in a bactericidal efficiency of 96.2 % against <em>E. coli</em> and 98.4 % against <em>S. aureus.</em></div></div>","PeriodicalId":16782,"journal":{"name":"Journal of Photochemistry and Photobiology A-chemistry","volume":"463 ","pages":"Article 116310"},"PeriodicalIF":4.1,"publicationDate":"2025-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143142539","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

Ce2O3 and TiO2 p-n heterojunction for enhanced degradation of p-nitrophenol under visible light

IF 4.1 3区化学 Q2 CHEMISTRY, PHYSICAL

Journal of Photochemistry and Photobiology A-chemistry

Pub Date : 2025-01-27 DOI: 10.1016/j.jphotochem.2025.116284

Antoine Farcy , Maxine Mathy , Louise Lejeune , Pierre Eloy , Sophie Hermans , Patrick Drogui , Julien G. Mahy

A sol–gel method is used to synthesize TiO₂, using few organic products. In order to increase the photocatalytic activity in the near visible range (395 nm), cerium is used as a dopant at various concentrations ranging from 0.03 mol% to 4.40 mol%. The addition of cerium leads to the formation of p-n heterojunctions between Ce₂O₃ and TiO₂, multiplying by 2 (under UV–visible light) or 2.6 (under visible light) the photocatalytic efficiency of the composite material with the best dopant amount, i.e. 0.06 mol% of cerium. X-ray diffraction showed the formation of TiO₂ in its anatase form, while nitrogen adsorption/desorption isotherms showed changes in specific surface area as a function of the percentage of cerium added. The presence of cerium (III) in the sample is confirmed by XPS and the amount is determined quantitatively by ICP. DRUS analysis highlights the difference in bandgap caused by the Ce₂O₃ incorporated into the sample. In order to compare the different photocatalysts obtained, the degradation of p-nitrophenol is tested in their presence in water under UV light as well as a wavelength close to the visible range, i.e. 395 nm. Finally, based on the results obtained by electron paramagnetic resonance, a photoactivation mechanism of the mixed oxide is proposed.

{"title":"Ce2O3 and TiO2 p-n heterojunction for enhanced degradation of p-nitrophenol under visible light","authors":"Antoine Farcy , Maxine Mathy , Louise Lejeune , Pierre Eloy , Sophie Hermans , Patrick Drogui , Julien G. Mahy","doi":"10.1016/j.jphotochem.2025.116284","DOIUrl":"10.1016/j.jphotochem.2025.116284","url":null,"abstract":"<div><div>A sol–gel method is used to synthesize TiO<sub>2</sub>, using few organic products. In order to increase the photocatalytic activity in the near visible range (395 nm), cerium is used as a dopant at various concentrations ranging from 0.03 mol% to 4.40 mol%. The addition of cerium leads to the formation of p-n heterojunctions between Ce<sub>2</sub>O<sub>3</sub> and TiO<sub>2</sub>, multiplying by 2 (under UV–visible light) or 2.6 (under visible light) the photocatalytic efficiency of the composite material with the best dopant amount, i.e. 0.06 mol% of cerium. X-ray diffraction showed the formation of TiO<sub>2</sub> in its anatase form, while nitrogen adsorption/desorption isotherms showed changes in specific surface area as a function of the percentage of cerium added. The presence of cerium (III) in the sample is confirmed by XPS and the amount is determined quantitatively by ICP. DRUS analysis highlights the difference in bandgap caused by the Ce<sub>2</sub>O<sub>3</sub> incorporated into the sample. In order to compare the different photocatalysts obtained, the degradation of p-nitrophenol is tested in their presence in water under UV light as well as a wavelength close to the visible range, i.e. 395 nm. Finally, based on the results obtained by electron paramagnetic resonance, a photoactivation mechanism of the mixed oxide is proposed.</div></div>","PeriodicalId":16782,"journal":{"name":"Journal of Photochemistry and Photobiology A-chemistry","volume":"463 ","pages":"Article 116284"},"PeriodicalIF":4.1,"publicationDate":"2025-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143142932","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

Photoluminescent property, mechanistic and crystallographic studies on novel (Z)-5,6-dihydrodibenzo[b,f]azocine AIEgens

IF 4.1 3区化学 Q2 CHEMISTRY, PHYSICAL

Journal of Photochemistry and Photobiology A-chemistry

Pub Date : 2025-01-27 DOI: 10.1016/j.jphotochem.2025.116293

Wen-Chao Xiong , Yan-Xue Li , Hao-Yuan Zhang , Shan-Shan Gong , Shouzhi Pu , Rongwei Shi , Qi Sun

A series of four novel (Z)-5,6-dihydrodibenzo[b,f]azocine AIEgens (DHDBA-1–4) featuring a flexible non-aromatic eight-membered ring fused with two rigid aromatic rings were designed and synthesized. All of these π-conjugated polycyclics exhibited typical AIE properties with excellent solid-state fluorescence quantum yields ranging from 33.2 % to 67.6 %. Theoretical calculations revealed that DHDBA-1–4 adopt a unique tub conformation in solutions and their excitations have both locally excited (LE) and charge transfer (CT) characters. As exemplified by DHDBA-1, the low molar absorption coefficient and energetically accessible S₀/S₁ minimum energy conical intersection (MECI) were identified as the two major causes for the poor photoluminescent properties of DHDBA compounds in solution phase. In solid state, DHDBA compounds was found to adopt more planar conformations. The more effective excitation and prohibition of structural deformation that leads to S₀/S₁ surface crossing open the radiative decay channel. Crystallographic analysis illustrated that the flexibility of the central dihydroazocine core enables the DHDBA compounds to exist in multiple conformations in crystal lattice. The absence of π–π stacking and presence of abundant weak intermolecular interactions in the single crystals well explain their high solid-state fluorescence quantum yields.

{"title":"Photoluminescent property, mechanistic and crystallographic studies on novel (Z)-5,6-dihydrodibenzo[b,f]azocine AIEgens","authors":"Wen-Chao Xiong , Yan-Xue Li , Hao-Yuan Zhang , Shan-Shan Gong , Shouzhi Pu , Rongwei Shi , Qi Sun","doi":"10.1016/j.jphotochem.2025.116293","DOIUrl":"10.1016/j.jphotochem.2025.116293","url":null,"abstract":"<div><div>A series of four novel (<em>Z</em>)-5,6-dihydrodibenzo[<em>b</em>,<em>f</em>]azocine AIEgens (<strong>DHDBA-1</strong>–<strong>4</strong>) featuring a flexible non-aromatic eight-membered ring fused with two rigid aromatic rings were designed and synthesized. All of these π-conjugated polycyclics exhibited typical AIE properties with excellent solid-state fluorescence quantum yields ranging from 33.2 % to 67.6 %. Theoretical calculations revealed that <strong>DHDBA-1</strong>–<strong>4</strong> adopt a unique tub conformation in solutions and their excitations have both locally excited (LE) and charge transfer (CT) characters. As exemplified by <strong>DHDBA-1</strong>, the low molar absorption coefficient and energetically accessible S<sub>0</sub>/S<sub>1</sub> minimum energy conical intersection (MECI) were identified as the two major causes for the poor photoluminescent properties of DHDBA compounds in solution phase. In solid state, DHDBA compounds was found to adopt more planar conformations. The more effective excitation and prohibition of structural deformation that leads to S<sub>0</sub>/S<sub>1</sub> surface crossing open the radiative decay channel. Crystallographic analysis illustrated that the flexibility of the central dihydroazocine core enables the DHDBA compounds to exist in multiple conformations in crystal lattice. The absence of π–π stacking and presence of abundant weak intermolecular interactions in the single crystals well explain their high solid-state fluorescence quantum yields.</div></div>","PeriodicalId":16782,"journal":{"name":"Journal of Photochemistry and Photobiology A-chemistry","volume":"463 ","pages":"Article 116293"},"PeriodicalIF":4.1,"publicationDate":"2025-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143142925","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 sensitive colorimetric and “OFF-ON” fluorescent sensor for cyanide ions based on ESIPT-AIE mechanism from a fluorene-hydroxybenzaldehyde Schiff base

IF 4.1 3区化学 Q2 CHEMISTRY, PHYSICAL

Journal of Photochemistry and Photobiology A-chemistry

Pub Date : 2025-01-27 DOI: 10.1016/j.jphotochem.2025.116295

Hossein Reza Darabi, Amin Ghaemi, Kioumars Aghapoor, Farshid Mohsenzadeh, Hani Sayahi, Ramo Nazarian

(E)-2-(((9H-Fluoren-2-yl)imino)methyl)phenol (FIP) is an ortho-hydroxy aromatic imine Schiff base that exhibits intramolecular hydrogen bonding. Its spectral characteristics, including absorption and fluorescence, were analyzed in solvents of varying polarities. FIP exhibited selective recognition of cyanide ions (CN⁻) in a DMF/H₂O buffer (7:3) at pH 7, showing significant changes in both absorption and “OFF-ON” fluorescent emission in the presence of competing anions. ¹H NMR and FT-IR studies indicate that the interaction with CN⁻ and OH⁻ involves a deprotonation process, leading to the formation of the keto tautomer of FIP, which plays a crucial role in the OFF-ON emission response: the ESIPT-ICT process is activated by OH⁻, while the ESIPT-AIE process is triggered by CN⁻. Notably, FIP exhibits high sensitivity for CN⁻ in fluorescent detection, with a limit of detection (LOD) of 6.5 nM, significantly lower than the absorbance detection (LOD = 97 nM). The sensor’s key attributes include selectivity, rapid response time, a large Stokes shift, and the ability to monitor CN⁻ levels in tap water, making it a user-friendly option for on-site applications.

{"title":"A sensitive colorimetric and “OFF-ON” fluorescent sensor for cyanide ions based on ESIPT-AIE mechanism from a fluorene-hydroxybenzaldehyde Schiff base","authors":"Hossein Reza Darabi, Amin Ghaemi, Kioumars Aghapoor, Farshid Mohsenzadeh, Hani Sayahi, Ramo Nazarian","doi":"10.1016/j.jphotochem.2025.116295","DOIUrl":"10.1016/j.jphotochem.2025.116295","url":null,"abstract":"<div><div>(E)-2-(((9H-Fluoren-2-yl)imino)methyl)phenol (<strong>FIP</strong>) is an <em>ortho</em>-hydroxy aromatic imine Schiff base that exhibits intramolecular hydrogen bonding. Its spectral characteristics, including absorption and fluorescence, were analyzed in solvents of varying polarities. <strong>FIP</strong> exhibited selective recognition of cyanide ions (CN<sup>−</sup>) in a DMF/H<sub>2</sub>O buffer (7:3) at pH 7, showing significant changes in both absorption and “OFF-ON” fluorescent emission in the presence of competing anions. <sup>1</sup>H NMR and FT-IR studies indicate that the interaction with CN<sup>−</sup> and OH<sup>−</sup> involves a deprotonation process, leading to the formation of the keto tautomer of <strong>FIP</strong>, which plays a crucial role in the OFF-ON emission response: the ESIPT-ICT process is activated by OH<sup>−</sup>, while the ESIPT-AIE process is triggered by CN<sup>−</sup>. Notably, <strong>FIP</strong> exhibits high sensitivity for CN<sup>−</sup> in fluorescent detection, with a limit of detection (LOD) of 6.5 nM, significantly lower than the absorbance detection (LOD = 97 nM). The sensor’s key attributes include selectivity, rapid response time, a large Stokes shift, and the ability to monitor CN<sup>−</sup> levels in tap water, making it a user-friendly option for on-site applications.</div></div>","PeriodicalId":16782,"journal":{"name":"Journal of Photochemistry and Photobiology A-chemistry","volume":"463 ","pages":"Article 116295"},"PeriodicalIF":4.1,"publicationDate":"2025-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143142931","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

Highly efficient photocatalytic inactivation of flowing bioaerosol by using visible light-assisted titanium-based composite: Application and mechanism

IF 4.1 3区化学 Q2 CHEMISTRY, PHYSICAL

Journal of Photochemistry and Photobiology A-chemistry

Pub Date : 2025-01-25 DOI: 10.1016/j.jphotochem.2025.116287

Xiaoxuan Liu , Dafei Yu , Yujun Wang , Na Li , Kuo Wang , Yingnan Yang , Na Liu

Some pathogenic microorganisms can survive and spread as bioaerosols which is a serious threat to human health. Hence, a visible light-assisted photocatalytic inactivation system for bioaerosol inactivation was constructed based on the novel P/Ag/Ag₂O/Ag₃PO₄/TiO₂ (PAgT) composite photocatalyst. The highest inactivation efficiency for 10⁸ CFU/m³ Escherichia coli bioaerosol could reach 99.3 % within just 14.1 s under visible light irradiation. The effect of various operational conditions on photocatalytic inactivation efficiency were investigated, including light intensity, bioaerosol concentration and residence time. Furthermore, during the bioaerosol inactivation process, the changes of cell morphology and intracellular reactive oxygen species were clarified. The oxidizing substances h⁺, O₂⁻ and OH produced on the surface of the photocatalyst under the irradiation of visible light were the direct cause of cell oxidizing damage. It disrupted cell membrane permeability and cause an increase in intracellular reactive oxygen species, ultimately leading to cell death. The system possessed an irreversible and efficient photocatalytic bioaerosol sterilization ability toward different airborne pathogenic bacteria, including Gram-positive and Gram-negative bacteria. In addition, the PAgT photocatalytic system demonstrated good cyclability and stability for bioaerosol inactivation, providing a promising strategy to reduce the airborne pathogenic microbial contamination, especially for indoor or occupied space.

{"title":"Highly efficient photocatalytic inactivation of flowing bioaerosol by using visible light-assisted titanium-based composite: Application and mechanism","authors":"Xiaoxuan Liu , Dafei Yu , Yujun Wang , Na Li , Kuo Wang , Yingnan Yang , Na Liu","doi":"10.1016/j.jphotochem.2025.116287","DOIUrl":"10.1016/j.jphotochem.2025.116287","url":null,"abstract":"<div><div>Some pathogenic microorganisms can survive and spread as bioaerosols which is a serious threat to human health. Hence, a visible light-assisted photocatalytic inactivation system for bioaerosol inactivation was constructed based on the novel P/Ag/Ag<sub>2</sub>O/Ag<sub>3</sub>PO<sub>4</sub>/TiO<sub>2</sub> (PAgT) composite photocatalyst. The highest inactivation efficiency for 10<sup>8</sup> CFU/m<sup>3</sup> <em>Escherichia coli</em> bioaerosol could reach 99.3 % within just 14.1 s under visible light irradiation. The effect of various operational conditions on photocatalytic inactivation efficiency were investigated, including light intensity, bioaerosol concentration and residence time. Furthermore, during the bioaerosol inactivation process, the changes of cell morphology and intracellular reactive oxygen species were clarified. The oxidizing substances h<sup>+</sup>, <img>O<sub>2</sub><sup>−</sup> and <img>OH produced on the surface of the photocatalyst under the irradiation of visible light were the direct cause of cell oxidizing damage. It disrupted cell membrane permeability and cause an increase in intracellular reactive oxygen species, ultimately leading to cell death. The system possessed an irreversible and efficient photocatalytic bioaerosol sterilization ability toward different airborne pathogenic bacteria, including Gram-positive and Gram-negative bacteria. In addition, the PAgT photocatalytic system demonstrated good cyclability and stability for bioaerosol inactivation, providing a promising strategy to reduce the airborne pathogenic microbial contamination, especially for indoor or occupied space.</div></div>","PeriodicalId":16782,"journal":{"name":"Journal of Photochemistry and Photobiology A-chemistry","volume":"463 ","pages":"Article 116287"},"PeriodicalIF":4.1,"publicationDate":"2025-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143142536","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

Functionalized sulfonic acid groups enhance solubility and stability of graphene quantum dots for efficient photosynthesis of lettuce

IF 4.1 3区化学 Q2 CHEMISTRY, PHYSICAL

Journal of Photochemistry and Photobiology A-chemistry

Pub Date : 2025-01-23 DOI: 10.1016/j.jphotochem.2025.116280

Junjie Yuan , Zongli Yang , Jiayi Zou , Zhongqiu Wu , Zhaolong Wang , Liang Wang , Wenlong Shen , Quan Zhang , Hui Xu

Graphene quantum dots exhibit outstanding fluorescence properties, low cytotoxicity, and exceptional biocompatibility when interacting with plant cells, showcasing significant potential for photosynthesis of plants, such as lettuce. However, the poor dispersion and stability in aqueous solutions have hindered its photosynthetic efficiency. To address this issue, this work demonstrated the sulfonic acid group functionalized graphene quantum dots (SAG-GQDs), in which the sulfonic acid group prominently increased hydrophilicity, thus leading to an enhanced dispersion and stability of SAG-GQDs for efficient lettuce photosynthesis. Results indicated that the functionalized SAG-GQDs with spraying concentration of 3600 mg/L displayed the best photosynthetic efficiency for lettuce growth, including net photosynthetic rate of 8.6 μmol CO₂ m⁻² s⁻¹, increased leaf fresh weight of 36%, and nutritional 14 mg/g soluble sugar with biocompatibility availability. Our work suggests the feasibility of functionalized sulfonic acid group in regulating dispersion and stability of graphene quantum dots for promoting photosynthetic efficiency of lettuce plants.

{"title":"Functionalized sulfonic acid groups enhance solubility and stability of graphene quantum dots for efficient photosynthesis of lettuce","authors":"Junjie Yuan , Zongli Yang , Jiayi Zou , Zhongqiu Wu , Zhaolong Wang , Liang Wang , Wenlong Shen , Quan Zhang , Hui Xu","doi":"10.1016/j.jphotochem.2025.116280","DOIUrl":"10.1016/j.jphotochem.2025.116280","url":null,"abstract":"<div><div>Graphene quantum dots exhibit outstanding fluorescence properties, low cytotoxicity, and exceptional biocompatibility when interacting with plant cells, showcasing significant potential for photosynthesis of plants, such as lettuce. However, the poor dispersion and stability in aqueous solutions have hindered its photosynthetic efficiency. To address this issue, this work demonstrated the sulfonic acid group functionalized graphene quantum dots (SAG-GQDs), in which the sulfonic acid group prominently increased hydrophilicity, thus leading to an enhanced dispersion and stability of SAG-GQDs for efficient lettuce photosynthesis. Results indicated that the functionalized SAG-GQDs with spraying concentration of 3600 mg/L displayed the best photosynthetic efficiency for lettuce growth, including net photosynthetic rate of 8.6 μmol CO<sub>2</sub> m<sup>−2</sup> s<sup>−1</sup>, increased leaf fresh weight of 36%, and nutritional 14 mg/g soluble sugar with biocompatibility availability. Our work suggests the feasibility of functionalized sulfonic acid group in regulating dispersion and stability of graphene quantum dots for promoting photosynthetic efficiency of lettuce plants.</div></div>","PeriodicalId":16782,"journal":{"name":"Journal of Photochemistry and Photobiology A-chemistry","volume":"463 ","pages":"Article 116280"},"PeriodicalIF":4.1,"publicationDate":"2025-01-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143142540","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, photophysical properties and fluorescent application of novel [1,2,4]triazolo[1,5-a]pyrimidin-7(4H)-one derivatives

IF 4.1 3区化学 Q2 CHEMISTRY, PHYSICAL

Journal of Photochemistry and Photobiology A-chemistry

Pub Date : 2025-01-23 DOI: 10.1016/j.jphotochem.2025.116294

Suya Gan , Li-Xin Gao , Zitong Cao , Chun Zhang , Yiqiu Fu , Wen-Long Wang

To extend the application of our theoretical screening method for exploring novel fluorescent fragments, we identified [1,2,4]triazolo[1,5-a]pyrimidin-7(4H)-one as a potential fluorophore, whose optical properties are rarely investigated. In this work, nineteen of novel [1,2,4]triazolo[1,5-a]pyrimidin-7(4H)-one derivatives were designed, synthesized and the relationship between the structure and fluorescence property of [1,2,4]triazolo[1,5-a]pyrimidin-7(4H)-one derivatives was systematically elucidated. The representative compound 5b exhibited notable fluorescence intensity with good fluorescence quantum yield (Φ = 0.285) in PBS. More importantly, compound 5b selectively detected the Fe³⁺ ions through fluorescent quenching effect with rapid response, good anti-interference and low detection limit (LOD = 1.82 μM), and could be applied for encryption ink. This work provides an efficient way to explore novel fluorescent molecules.

引用次数: 0

Fluorometric detection of Hg2+ via metal displacement of BODIPY-Fe(III) complex in aqueous media

IF 4.1 3区化学 Q2 CHEMISTRY, PHYSICAL

Journal of Photochemistry and Photobiology A-chemistry

Pub Date : 2025-01-23 DOI: 10.1016/j.jphotochem.2025.116291

Pornthip Piyanuch , Jirapat Santatiwongchai , Sarawoot Impeng , Anyanee Kamkaew , Suttipong Wannapaiboon , Kantapat Chansaenpak

A selective and sensitive fluorogenic chemosensor based on Fe³⁺-BODIPY complex (BPH-Fe) was developed for the specific binding toward Hg²⁺ in aqueous system. This sensor reveals rapid recognition and simple detection of Hg²⁺ via metal displacement approach. The BPH-Fe complex showed excellently selective chelation to Hg²⁺ and was not affected by other interfering metal ions. This developed sensor exhibited the quenching of green fluorescence emission along with yellow to orange color change upon exposure to Hg²⁺ ion. The stoichiometric ratio of BPH-Fe complex to Hg²⁺ was established to be 1:1 by Job’s method. The detection limit of the sensor in the determination of Hg²⁺ was calculated as 1.8 ppb, which is lower than WHO and U.S. EPA allowable level (2 ppb). The X-ray absorption spectroscopy (XAS) probed at Hg L3-edge and Fe K-edge revealed the metal displacement of Fe³⁺ in BPH-Fe complex to form BPH-Hg²⁺ complex upon sensing process. Furthermore, BPH-Fe had been successfully employed to determine Hg²⁺ in living cancer cells.

{"title":"Fluorometric detection of Hg2+ via metal displacement of BODIPY-Fe(III) complex in aqueous media","authors":"Pornthip Piyanuch , Jirapat Santatiwongchai , Sarawoot Impeng , Anyanee Kamkaew , Suttipong Wannapaiboon , Kantapat Chansaenpak","doi":"10.1016/j.jphotochem.2025.116291","DOIUrl":"10.1016/j.jphotochem.2025.116291","url":null,"abstract":"<div><div>A selective and sensitive fluorogenic chemosensor based on Fe<sup>3+</sup>-BODIPY complex (<strong>BPH-Fe</strong>) was developed for the specific binding toward Hg<sup>2+</sup> in aqueous system. This sensor reveals rapid recognition and simple detection of Hg<sup>2+</sup> via metal displacement approach. The <strong>BPH-Fe</strong> complex showed excellently selective chelation to Hg<sup>2+</sup> and was not affected by other interfering metal ions. This developed sensor exhibited the quenching of green fluorescence emission along with yellow to orange color change upon exposure to Hg<sup>2+</sup> ion. The stoichiometric ratio of <strong>BPH-Fe</strong> complex to Hg<sup>2+</sup> was established to be 1:1 by Job’s method. The detection limit of the sensor in the determination of Hg<sup>2+</sup> was calculated as 1.8 ppb, which is lower than WHO and U.S. EPA allowable level (2 ppb). The X-ray absorption spectroscopy (XAS) probed at Hg L3-edge and Fe K-edge revealed the metal displacement of Fe<sup>3+</sup> in <strong>BPH-Fe</strong> complex to form <strong>BPH-Hg<sup>2+</sup></strong> complex upon sensing process. Furthermore, <strong>BPH-Fe</strong> had been successfully employed to determine Hg<sup>2+</sup> in living cancer cells.</div></div>","PeriodicalId":16782,"journal":{"name":"Journal of Photochemistry and Photobiology A-chemistry","volume":"463 ","pages":"Article 116291"},"PeriodicalIF":4.1,"publicationDate":"2025-01-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143142927","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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