Journal of Photochemistry and Photobiology A-chemistry最新文献_第3页

Co single atom loaded carbon nitride porous nanotube catalysts for efficient photothermal catalysis for H2O2 production Co单原子负载氮化碳多孔纳米管催化剂用于光热催化生产H2O2

IF 4.7 3区化学 Q2 CHEMISTRY, PHYSICAL

Journal of Photochemistry and Photobiology A-chemistry

Pub Date : 2026-09-01 Epub Date: 2026-03-08 DOI: 10.1016/j.jphotochem.2026.117183

Yuxin Wang , Bingbing Huang , Tingting Huang , Xing Liu

To develop the efficient catalytic active sites for the reduction of O₂ to H₂O₂ while ensuring their inertness to H₂O₂ decomposition is crucial for the photothermal catalytic synthesis of H₂O₂ process, but still faces challenges. Herein, Co single-atom-loaded carbon nitride porous nanotubes (Co_SA/CN-PNTs) were prepared by self-assembled polymerization and calcined annealing. The Co single atom is not only Co single atom can not only form CoN bond with N in CN as an electron transport bridge, but also act as an active center in the photothermal catalytic O₂ reduction for H₂O₂ synthesis. The porous tubular structure not only contributes to the enhancement of light absorption and utilization, but also facilitates the adsorption of O₂ as well as the formation of the key intermediate *OOH on the Co sites. Notably, the thermal effect generated by Co_SA/CN-PNT during photocatalysis contributes to the rapidity of the reaction and ensures that the rapidly adsorbed O₂ on its surface inhibits the decomposition of H₂O₂. The results showed that the H₂O₂ generation rates of Co_SA/CN-PNT reached 148.6 μmol L⁻¹ h⁻¹ and 169.6 μmol L⁻¹ h⁻¹ under visible light and solar radiation irradiation, respectively, which were 15 times and 16 times higher than those of the pristine CN material by a factor of 15.1 and 13.9, respectively. Therefore, this work improves the construction and understanding of the structure-efficacy relationship of catalysts at the atomic level by exploring the role of single atoms in the coordination shell layer and developing catalytic centers with unique single atoms.

开发高效的催化活性位点，既能将O2还原为H2O2，又能保证其对H2O2分解的惰性，是光热催化合成H2O2过程的关键，但仍面临挑战。本文采用自组装聚合和煅烧退火法制备了Co单原子负载氮化碳多孔纳米管（CoSA/CN-PNTs）。Co单原子不仅可以与CN中的N形成CoN键作为电子传递桥，还可以作为光热催化O2还原H2O2合成的活性中心。多孔管状结构不仅有助于增强光的吸收和利用，而且有利于O2的吸附以及Co位点上关键中间体*OOH的形成。值得注意的是，CoSA/CN-PNT在光催化过程中产生的热效应有助于反应的快速进行，并确保其表面快速吸附的O2抑制H2O2的分解。结果表明，在可见光和太阳辐射照射下，CoSA/CN- pnt的H₂O₂生成速率分别达到148.6 μmol L−1 H−1和169.6 μmol L−1 H−1，分别是原始CN材料的15倍和16倍，分别提高了15.1和13.9倍。因此，本工作通过探索单原子在配位壳层中的作用，开发具有独特单原子的催化中心，在原子水平上提高了对催化剂结构-功效关系的构建和理解。

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引用次数: 0

Multi-ion sensing profiling using imidazole-based sensory probe 基于咪唑传感探针的多离子传感剖面

IF 4.7 3区化学 Q2 CHEMISTRY, PHYSICAL

Journal of Photochemistry and Photobiology A-chemistry

Pub Date : 2026-09-01 Epub Date: 2026-02-25 DOI: 10.1016/j.jphotochem.2026.117149

Neha Garg , Shalu Thakur , Armaandeep Kaur , Abhijit Dan , Savita Chaudhary , Aman Bhalla

Imperilling impact of heavy metal toxicity possessed serious threat to the wellbeing of our ecosystem. By utilizing the fluorescence abilities of 2,4,5-Tris phenylselanyl-1H-imidazole (3b) based probe, we developed high performing sensory probe for the accurate estimation of multiple metal ions. Under optimal conditions, our probe effectively detected Fe³⁺ and Cu²⁺ ions, distinguishing them from a wide array of other metals using UV–vis. and fluorescence measurements with wide linear ranges of 5 to 1000 μM. The respective limit of detection values are 0.40 μM and 0.23 μM for Fe³⁺ and Cu²⁺ ions respectively. Moreover, the complex of probe 3b with Fe³⁺/Cu²⁺ ions serve as a turn-on sensor for the detection of Ce³⁺ ions with LOD values of 0.14 μM and 0.31 μM in presence of Fe³⁺ and Cu²⁺ ions respectively. We performed a density functional theory (DFT) based computational study to gain crucial insights into how (3b) complexes with Fe³⁺ and Cu²⁺ ions. A logic gate was also designed to determine its potential in detection of Fe³⁺, Cu²⁺ and Ce³⁺ ions in an ‘off-on’ mode. This research provides a fresh perspective for creating innovative chemo-sensors. These sensors hold significant promise for selective and sensitive detection of multiple metal ions.

重金属毒性的危害已严重威胁到我们生态系统的健康。利用2,4,5-三苯基selanyl- 1h -咪唑（3b）探针的荧光特性，我们开发了一种用于多种金属离子精确估计的高性能传感探针。在最佳条件下，我们的探针有效地检测到Fe3+和Cu2+离子，并使用UV-vis将它们与各种其他金属区分开来。荧光测量，线性范围宽5 ~ 1000 μM。Fe3+和Cu2+离子的检出限分别为0.40 μM和0.23 μM。此外，探针3b与Fe3+/Cu2+离子的配合物可作为Ce3+的导通传感器，在Fe3+和Cu2+离子存在时，其LOD值分别为0.14 μM和0.31 μM。我们进行了基于密度泛函理论（DFT）的计算研究，以获得（3b）与Fe3+和Cu2+离子配合物的关键见解。还设计了一个逻辑门，以确定其在“开关”模式下检测Fe3+， Cu2+和Ce3+离子的潜力。本研究为化学传感器的创新提供了新的视角。这些传感器在选择性和敏感检测多种金属离子方面具有重要的前景。

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引用次数: 0

Degradation of widely used antiglaucoma drugs mediated by photo-generated reactive oxygen species 光生成活性氧介导的广泛应用的抗青光眼药物的降解

IF 4.7 3区化学 Q2 CHEMISTRY, PHYSICAL

Journal of Photochemistry and Photobiology A-chemistry

Pub Date : 2026-09-01 Epub Date: 2026-03-03 DOI: 10.1016/j.jphotochem.2026.117158

Charis Parramón Jurado , Cecilia Liaudat , Marcela Altamirano , Cecilia Challier , Susana Criado

Reactive oxygen species (ROS) are produced as by-products of oxygen metabolism and play an essential role in biological systems. In the eye, ROS can also be generated through the photosensitizing action of natural pigments like riboflavin. Disruption of the balance between ROS production and the antioxidant defense system leads to oxidative stress, which contributes to the development and progression of ocular diseases such as glaucoma. Under these conditions, oxidative degradation may occur in ophthalmic drugs used to treat glaucoma, potentially reducing their therapeutic efficacy and generating toxic products.

This study investigates the ROS-mediated degradation of widely used antiglaucoma drugs dorzolamide (DZ), ethoxzolamide (ET) and brimonidine tartrate (BT) in the presence of riboflavin and rose bengal as photosensitizers. Photochemical and spectroscopic analyses confirmed that these drugs interact with the electronically excited states of riboflavin and with various photo-generated ROS from these states, undergoing oxidative degradation via Type I and Type II mechanisms. The antiglaucoma drugs also exhibited pro-oxidant capacity, being able to generate O₂(¹Δ_g) upon direct irradiation and self-degrading under these conditions.

Furthermore, the potential cytotoxic effects of the degradation products were evaluated using human MRC-5 cells. The results showed that neither the drugs nor their oxidation products were significantly cytotoxic under the current experimental conditions.

These findings emphasize the importance of considering oxidative stability when formulating ophthalmic drugs, offering valuable insights into their behavior under oxidative stress scenarios.

活性氧（ROS）是氧代谢的副产物，在生物系统中起着至关重要的作用。在眼睛中，ROS也可以通过核黄素等天然色素的光敏作用产生。ROS生成和抗氧化防御系统之间的平衡被破坏导致氧化应激，这有助于青光眼等眼部疾病的发生和进展。在这些条件下，用于治疗青光眼的眼科药物可能发生氧化降解，可能降低其治疗效果并产生有毒产物。本研究研究了在核黄素和玫瑰红作为光敏剂存在下，ros介导的抗青光眼药物多唑胺（DZ）、乙氧唑胺（ET）和酒石酸溴胺（BT）的降解。光化学和光谱分析证实，这些药物与核黄素的电子激发态以及由这些状态产生的各种光生ROS相互作用，通过I型和II型机制进行氧化降解。抗青光眼药物也表现出促氧化能力，能够在直接照射下产生O2(1Δg)，并在这些条件下自降解。此外，利用人MRC-5细胞评估了降解产物的潜在细胞毒性作用。结果表明，在目前的实验条件下，药物及其氧化产物均没有明显的细胞毒性。这些发现强调了在制定眼科药物时考虑氧化稳定性的重要性，为它们在氧化应激情景下的行为提供了有价值的见解。

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引用次数: 0

Transformation of crystal violet in water under the influence of UV and e-beam radiation 紫外光和电子束辐射作用下结晶紫在水中的转变

IF 4.7 3区化学 Q2 CHEMISTRY, PHYSICAL

Journal of Photochemistry and Photobiology A-chemistry

Pub Date : 2026-07-01 Epub Date: 2026-02-07 DOI: 10.1016/j.jphotochem.2026.117089

О.N. Tchaikovskaya , E.N. Bocharnikova , V.I. Solomonov , A.V. Spirina , A.S. Makarova , M. Gomez , M.D. Murcia

This paper presents the spectral study results for the photolysis and radiolysis of a cationic dye, namely crystal violet (CV), dissolved in water, under the influence of ultraviolet (UV) radiation and a pulsed electron beam (e-beam) with an electron energy of 170 keV. UV irradiation was performed using KrCl (222 nm) and XeBr (282 nm) excilamps. The influence of H₂O₂ and Na₂S₂O₈ additives, CV concentration, solution volume, and combined UV irradiation on the dye degradation kinetics was studied. Under 222-nm irradiation in the presence of H₂O₂, the degradation followed pseudo-first-order kinetics with a rate constant of 0.16 ± 0.01 min⁻¹. Dual-wavelength UV irradiation with both KrCl and XeBr excilamps exhibited a synergistic effect. When exposed to e-beam irradiation with a pulse number of up to 1600 pulses and a repetition rate of 1 Hz, CV decolorization was recorded even without the addition of oxidizing agents. E-beam irradiation caused the accumulation and subsequent destruction of intermediate products absorbing in the range of 350–450 nm. The toxicity of aqueous CV solutions subjected to e-beam irradiation was assessed with the use of a phytotest method. A comparative analysis of UV and e-beam irradiation showed that the latter provided a comparable or higher CV conversion efficiency compared to 10-min UV treatment. The findings confirmed the prospects of using KrCl/H₂O₂ and e-beam irradiation methods for dye removal from wastewater.

本文介绍了溶解于水中的阳离子染料结晶紫（CV）在紫外线（UV）辐射和电子能量为170 keV的脉冲电子束（e-beam）作用下光解和辐射解的光谱研究结果。用KrCl （222 nm）和XeBr （282 nm）进行紫外照射。研究了H2O2和Na2S2O8添加剂、CV浓度、溶液体积和紫外联合照射对染料降解动力学的影响。在H2O2存在的222nm照射下，降解符合准一级动力学，速率常数为0.16±0.01 min−1。KrCl和XeBr双波长紫外光辐照表现出协同效应。当暴露在脉冲数高达1600脉冲和重复频率为1hz的电子束照射下时，即使没有添加氧化剂，也记录了CV脱色。电子束辐照引起350 ~ 450 nm吸收的中间产物的积累和随后的破坏。使用植物试验方法评估了电子束辐照下CV水溶液的毒性。紫外线和电子束照射的比较分析表明，与10分钟的紫外线处理相比，电子束照射提供了相当或更高的CV转换效率。研究结果证实了利用KrCl/H2O2和电子束辐照法脱除废水染料的前景。

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引用次数: 0

Rationally designed bifunctional covalent organic polymers for broad-spectrum-driven photothermal catalytic Cr(VI) reduction and iodine capture 合理设计用于广谱驱动光热催化Cr（VI）还原和碘捕获的双功能共价有机聚合物

IF 4.7 3区化学 Q2 CHEMISTRY, PHYSICAL

Journal of Photochemistry and Photobiology A-chemistry

Pub Date : 2026-07-01 Epub Date: 2026-02-01 DOI: 10.1016/j.jphotochem.2026.117078

Gu-Yu Zhu, Heng Su, Yu-Hui Luo, Xin Wang, Xue-Meng Jia, Dong-En Zhang

In this work, two new covalent organic polymers (COPs), namely TAPA-CTP and TAPD-CTP, were successfully synthesized using a one-pot solvothermal method (CTP-6-CHO = hexa(4-formyl-phenoxy)cyclotriphosphazene, TAPA = tris(4-aminophenyl)amine, TAPD = N,N,N′,N′-tetrakis(4-aminophenyl)-1,4-phenylenediamine). Both TAPA-CTP and TAPD-CTP exhibit broad spectral absorption across the ultraviolet-visible-near infrared region, enabling efficient solar energy utilization. Under simulated sunlight, the surface temperatures of TAPA-CTP and TAPD-CTP powder rapidly reached 229.0 °C and 263.5 °C within 60 s, respectively. The temperatures of TAPA-CTP and TAPD-CTP dispersions (0.33 mg mL⁻¹) can also rise from room temperature to 55.1 °C and 61.5 °C under simulated sunlight, achieving photothermal conversion efficiencies of 45.3% and 65.4%, respectively. Furthermore, TAPA-CTP and TAPD-CTP show promise for photothermal-assisted photocatalytic reduction of hexavalent chromium (Cr(VI)). In particular, TAPD-CTP showed 96.0% removal of Cr(VI) in 8 min with no sacrificial agents, giving a high reaction rate constant of 0.402 min⁻¹. In addition, owing to the abundant nitrogen sites and conjugated groups in their frameworks, both TAPA-CTP and TAPD-CTP exhibit outstanding iodine adsorption capacities of 2.51 and 3.87 g g⁻¹, respectively. This study provides valuable insights into the design and synthesis of metal-free functional materials for the efficient removal of hazardous pollutants.

本文采用一锅溶剂热法成功合成了两种新型共价有机聚合物（CTP-6-CHO =六（4-甲氧基）环三磷腈，TAPA =三（4-氨基苯基）胺，TAPD = N，N,N′，N′-四（4-氨基苯基）-1,4-苯二胺）。TAPA-CTP和TAPD-CTP在紫外-可见-近红外区域均表现出广谱吸收，实现了对太阳能的高效利用。在模拟阳光下，TAPA-CTP和TAPD-CTP粉末的表面温度分别在60 s内迅速达到229.0℃和263.5℃。在模拟光照下，TAPA-CTP和TAPA-CTP分散体（0.33 mg mL−1）的温度也可以从室温升高到55.1°C和61.5°C，光热转换效率分别为45.3%和65.4%。此外，TAPA-CTP和TAPD-CTP在光热辅助光催化还原六价铬（Cr(VI)）方面表现出良好的前景。其中，在没有牺牲剂的情况下，TAPD-CTP在8 min内对Cr（VI）的去除率达到96.0%，反应速率常数为0.402 min−1。此外，由于其框架中含有丰富的氮位点和共轭基团，TAPA-CTP和TAPD-CTP均表现出出色的碘吸附能力，分别为2.51和3.87 g g−1。该研究为设计和合成无金属功能材料以有效去除有害污染物提供了有价值的见解。

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引用次数: 0

Design of rare-earth-free Ba3Gd2WO9:Mn4+ phosphor with excellent responsiveness to phytochrome PFR for the indoor plant cultivation 室内植物栽培中对光敏色素PFR具有良好响应性的无稀土Ba3Gd2WO9:Mn4+荧光粉的设计

IF 4.7 3区化学 Q2 CHEMISTRY, PHYSICAL

Journal of Photochemistry and Photobiology A-chemistry

Pub Date : 2026-07-01 Epub Date: 2026-01-26 DOI: 10.1016/j.jphotochem.2026.117060

Zhengrong Xia , Jing Wang , Yan Xu , Wang Zhao , Weiwei Zhou , Mingjun Song

The development of high-performance and non-rare-earth deep-red-emitting phosphor is of great significance for indoor plant cultivation. In this research, a novel kind of double perovskite Ba₃Gd₂WO₉:Mn⁴⁺ phosphor is synthesized through high-temperature solid-state method. Its electronic band and crystal structure, as well as luminescence properties were systematically investigated. X-ray diffraction and Rietveld refinement confirmed the formation of a pure phase and successful incorporation of Mn⁴⁺ into the Ba₃Gd₂WO₉ lattice. Under NUV excitation, the emission spectra exhibited an intense far-red emission peak at 690 nm, attributed to the (Wu et al., 2019) ²E_g → ⁴A_2g transition of Mn⁴⁺. The optimal doping concentration of Mn⁴⁺ is 0.004, and the primary quenching mechanism was identified to be electric dipole-dipole interactions between Mn⁴⁺ ions. Crystal field analysis revealed that Mn⁴⁺ is located in a strong octahedral field in Ba₃Gd₂WO₉, with a D_q/B value of 2.48. Finally, far-red LED device was fabricated using Ba₃Gd₂WO₉:0.004Mn⁴⁺ phosphor, and its electroluminescent spectrum showed a large overlap with the absorption spectrum of phytochrome P_FR, indicating its potential application for indoor plant growth illumination.

开发高性能、非稀土深红光荧光粉对室内植物栽培具有重要意义。本研究采用高温固相法合成了一种新型双钙钛矿Ba3Gd2WO9:Mn4+荧光粉。系统地研究了其电子能带、晶体结构和发光性能。x射线衍射和Rietveld细化证实了纯相的形成和Mn4+成功结合到Ba3Gd2WO9晶格中。在NUV激发下，发射光谱在690 nm处呈现出强烈的远红发射峰，这是由于（Wu et al., 2019） Mn4+发生2Eg→4A2g跃迁。Mn4+的最佳掺杂浓度为0.004，主要猝灭机制为Mn4+离子之间的电偶极-偶极相互作用。晶体场分析表明，Mn4+在Ba3Gd2WO9中处于强八面体场，Dq/B值为2.48。最后，利用Ba3Gd2WO9:0.004Mn4+荧光粉制备了远红色LED器件，其电致发光光谱与光敏色素PFR的吸收光谱有较大的重叠，表明其在室内植物生长照明方面具有潜在的应用前景。

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引用次数: 0

Predicting power conversion efficiency in donor-acceptor pairs for organic solar cells using machine learning ensemble models 利用机器学习集成模型预测有机太阳能电池供体-受体对的功率转换效率

IF 4.7 3区化学 Q2 CHEMISTRY, PHYSICAL

Journal of Photochemistry and Photobiology A-chemistry

Pub Date : 2026-07-01 Epub Date: 2026-01-27 DOI: 10.1016/j.jphotochem.2026.117066

Kapil Dev Mahato

Machine learning (ML) has emerged as a powerful approach for accelerating the design of efficient organic solar cells (OSCs) by correlating molecular features with device performance. However, predictive modeling of power conversion efficiency (PCE) remains challenging due to the small size and heterogeneity of available experimental datasets. In this study, we propose a robust and data-efficient ensemble learning framework for accurately predicting PCE in donor-acceptor (D-A) molecular pairs. A dataset of 319 experimentally derived D-A combinations, containing key electronic and molecular descriptors, was employed to develop five regression models: Fine Tree (FT), Medium Tree (MT), Coarse Tree (CT), Bagged Tree (BGT), and Boosted Tree (BST). Among the models examined, the BST ensemble outperformed the others, achieving an R² of 88.75%, a minimum MAE of 0.522, and an RMSE of 0.725 for validation, as well as an R² of 85.26%, a minimum MAE of 0.549, and an RMSE of 0.734 for testing. The proposed framework integrates SMILES-derived molecular fingerprints with ensemble learning to capture complex, nonlinear interactions between donor and acceptor features, enabling the reliable estimation of efficiency even with limited data. This work highlights that data-driven ensemble approaches can serve as accurate and computationally economical methods for estimating the physical/chemical properties of OSC. The outcomes are expected to enable researchers to conduct rapid screening and develop next-generation OSC materials.

机器学习（ML）已经成为通过将分子特征与器件性能相关联来加速高效有机太阳能电池（OSCs）设计的有力方法。然而，由于可用实验数据集的规模小和异质性，功率转换效率（PCE）的预测建模仍然具有挑战性。在这项研究中，我们提出了一个强大的、数据高效的集成学习框架，用于准确预测供体-受体（D-A）分子对的PCE。利用319个实验衍生的D-A组合数据集，包含关键的电子和分子描述符，建立了5种回归模型：细树（FT）、中树（MT）、粗树（CT）、袋装树（BGT）和提升树（BST）。在检验的模型中，BST集成优于其他模型，验证的R2为88.75%，最小MAE为0.522，RMSE为0.725；测试的R2为85.26%，最小MAE为0.549，RMSE为0.734。提出的框架将smile衍生的分子指纹与集成学习相结合，以捕获供体和受体特征之间复杂的非线性相互作用，即使在有限的数据下也能可靠地估计效率。这项工作强调了数据驱动的集成方法可以作为准确和计算经济的方法来估计盐含量的物理/化学性质。研究结果有望使研究人员能够进行快速筛选和开发下一代OSC材料。

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引用次数: 0

Rb3BiBr6 single crystals featured with suppressed self-trapped excitons emission at room temperature for efficient photocatalytic H2 evolution in aqueous HBr solution Rb3BiBr6单晶在室温下具有抑制自捕获激子发射的特性，用于HBr水溶液中有效的光催化析氢

IF 4.7 3区化学 Q2 CHEMISTRY, PHYSICAL

Journal of Photochemistry and Photobiology A-chemistry

Pub Date : 2026-07-01 Epub Date: 2026-01-26 DOI: 10.1016/j.jphotochem.2026.117062

Qingkun Kong , Shuhui Hu , Zongxin Huang , Yanhu Wang , Siping Liu

Bi-based perovskite as a new-type photocatalytic material holds promise to implement the solar-H₂ conversion, but the strong self-trapped excitons emission of Bi-based perovskite exhibit interior recombination of photo-generated carriers due to electron-phonon coupling. Herein, Rb₃BiBr₆ single crystals (SCs) which is composed of multiple pieces are synthesized, demonstrating efficient photocatalytic hydrogen evolution reaction in aqueous HBr solution, at room temperature and without the use of noble metal or metal oxide. At low temperature, Rb₃BiBr₆ SCs exhibit dual PL emission at 440 nm (free excitons) and 570 nm (self-trapped excitons), respectively. At room temperature, self-trapped excitons emission can be suppressed and Rb₃BiBr₆ SCs only show free excitons emission at 440 nm due to the reduce of electron-phonon coupling. Femtosecond transient absorption measurements reveal that Rb₃BiBr₆ SCs exhibit ultrafast hot-carrier relaxation (∼1 ps), revealing the efficient separation of electrons and holes. This work proposes a facile and versatile tactic to construct a low-cost Rb₃BiBr₆ for efficient photocatalytic hydrogen evolution reaction.

铋基钙钛矿作为一种新型光催化材料有望实现太阳能- h2转化，但铋基钙钛矿的强自困激子发射由于电子-声子耦合而表现出光生载流子的内部复合。本文合成了由多片组成的Rb3BiBr6单晶（SCs），在室温、不使用贵金属或金属氧化物的条件下，在HBr水溶液中进行了高效的光催化析氢反应。在低温下，Rb3BiBr6 SCs分别在440 nm（自由激子）和570 nm（自捕获激子）处表现出双PL发射。在室温下，由于电子-声子耦合的减少，Rb3BiBr6 SCs仅在440 nm处显示出自由激子发射。飞秒瞬态吸收测量表明，Rb3BiBr6 SCs表现出超快的热载子弛豫（~ 1 ps），显示出电子和空穴的有效分离。这项工作提出了一种简单而通用的策略来构建低成本的Rb3BiBr6，用于高效的光催化析氢反应。

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引用次数: 0

Synergistic photothermal antibacterial of peroxidase-like Cu2O/g-C3N4/palygorskite composite 类过氧化物酶Cu2O/g-C3N4/坡缕石复合材料的协同光热抗菌作用

IF 4.7 3区化学 Q2 CHEMISTRY, PHYSICAL

Journal of Photochemistry and Photobiology A-chemistry

Pub Date : 2026-07-01 Epub Date: 2026-02-07 DOI: 10.1016/j.jphotochem.2026.117102

Cuicui Liang , Na Huang , Fei Zha , Xiaohua Tang , Xiaojun Guo , Yue Chang

Cu₂O/g-C₃N₄/palygorskite composites (Cu₂O/g-C₃N₄/PAL) were prepared via a pyrolysis-adsorption-pyrolysis method. Electrochemical impedance spectroscopy, UV–vis DRS, and PL spectroscopy determination indicates that incorporation of palygorskite with g-C₃N₄ and Cu₂O increases the electron density on the Cu₂O surface to promote efficient charge separation and transfer. The photothermal conversion efficiency of 20%Cu₂O/g-C₃N₄/PAL (20%, mass of Cu₂O/g-C₃N₄ in Cu₂O/g-C₃N₄/PAL) is 18.17%. Quenching experiments and steady-state kinetic analysis prove Cu₂O/g-C₃N₄/PAL is a peroxidase-like enzyme with good ·O₂⁻ generation capacity to enhance the H₂O₂ decomposition efficiency into reactive oxygen species. DFT calculation of the surface merit functions shows g-C₃N₄ reduces the recombination of photogenerated electron-hole pairs. Thus, under near-infrared light irradiation at 35 °C in low concentrated H₂O₂, the antibacterial rates of 20%Cu₂O/g-C₃N₄/PAL against Staphylococcus aureus and Pseudomonas aeruginosa are 99.99% and 98.97%, respectively. EPR detection and oxidation of glutathione propose antibacterial mechanism catalyzed by Cu₂O/g-C₃N₄/PAL has a triple-action including photothermal sterilization, photo-enzyme catalytic decomposition of H₂O₂ to generate ROS, and the disruption to bacterial redox balance through glutathione depletion. The study offers a promising strategy for developing low-temperature, synergistic antibacterial platforms by integrating clay minerals with semiconductor heterojunctions, effectively addressing challenges such as bacterial resistance and the inefficiency of single-modal therapies.

采用热解-吸附-热解法制备了Cu2O/g-C3N4/坡缕石复合材料（Cu2O/g-C3N4/PAL）。电化学阻抗谱、UV-vis DRS和PL谱测定表明，坡缕石与g-C3N4和Cu2O的结合增加了Cu2O表面的电子密度，促进了有效的电荷分离和转移。20%Cu2O/g-C3N4/PAL的光热转换效率为18.17% （Cu2O/g-C3N4/PAL中Cu2O/g-C3N4质量为20%）。猝灭实验和稳态动力学分析证明Cu2O/g-C3N4/PAL是一种类似过氧化物酶的酶，具有良好的·O2 -生成能力，可以提高H2O2分解成活性氧的效率。表面优点函数的DFT计算表明，g-C3N4减少了光生电子-空穴对的复合。由此可见，在35℃低浓度H2O2近红外光照射下，20%Cu2O/g-C3N4/PAL对金黄色葡萄球菌和铜绿假单胞菌的抗菌率分别为99.99%和98.97%。EPR检测和氧化谷胱甘肽提出了Cu2O/g-C3N4/PAL催化的抗菌机制，具有光热杀菌、光酶催化H2O2分解生成ROS、谷胱甘肽耗竭破坏细菌氧化还原平衡的三重作用。该研究为开发低温协同抗菌平台提供了一种有前途的策略，通过将粘土矿物与半导体异质结结合，有效解决细菌耐药性和单模态治疗效率低下等挑战。

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引用次数: 0

Influence of anions on the photodegradation of antiviral drug: Comparative analysis of photocatalysts efficiency and a kinetic study 阴离子对抗病毒药物光降解的影响：光催化剂效率的比较分析及动力学研究

IF 4.7 3区化学 Q2 CHEMISTRY, PHYSICAL

Journal of Photochemistry and Photobiology A-chemistry

Pub Date : 2026-07-01 Epub Date: 2026-02-10 DOI: 10.1016/j.jphotochem.2026.117103

Humam Ahmed , Ewa Felis

The susceptibility to photodegradation of antiviral drug, isoprinosine (IPN), at ambient conditions in milli-Q and in tap water was studied in the presence of selected inorganic anions (SO₄⁻², Cl⁻, NO₃⁻, and CO₃⁻²), as the main components of inorganic environmental matrices as well as real surface water without additional ions were introduced, as surface water naturally contains dissolved inorganic species. The study was performed with 2.0 mg/L concentration of IPN with solar light irradiance (500 W/m²) using TiO₂-P25, ZnO, and SnO₂ as photocatalysts, with IPN quantified by HPLC at 260 nm. The photocatalytic degradation of IPN followed pseudo-first-order kinetics. In Milli-Q water, the highest degradation rate constant 0.0334 min⁻¹ (R² = 0.8875 min⁻¹) was recorded using 20.0 mg/L of pure TiO₂ in the presence of NO₃⁻ ion (50.0 mg/L), while in tap water, TiO₂ exhibited enhanced activity in the presence of SO₄⁻² ions (0.0481 min⁻¹, R² = 0.9862). Complete removal of IPN was achieved using pure TiO₂ in the presence of CO₃⁻² in both milli-Q and tap water. SnO₂ showed limited photocatalytic activity, 25%, 21%, and 29% after 2 h in the presence of Cl⁻, CO₃⁻², and SO₄⁻² ions, respectively in milli-Q water except NO₃⁻ ions. It is likely due to its wide band gap and charge carrier recombination. While in surface water, ZnO exhibited the highest degradation efficiency (kt = 0.0053 min⁻¹, R² = 0.9272). Mineralization assessment based on total organic carbon analysis revealed partial organic carbon removal, indicating the formation of transformation products under the investigated conditions.

本文研究了以无机阴离子（SO4−2、Cl−、NO3−和CO3−2）为主要成分的环境基质和不添加离子的真实地表水（地表水中天然含有溶解的无机物质）在毫米波和自来水中对光降解抗病毒药物异丙苷（IPN）的敏感性。以TiO2-P25、ZnO和SnO2为光催化剂，以2.0 mg/L浓度的IPN和太阳光照强度（500 W/m2）为条件，在260 nm处用高效液相色谱法测定IPN。光催化降解IPN遵循准一级动力学。在milliq水中，当NO3−离子（50.0 mg/L）存在时，当浓度为20.0 mg/L时，TiO2的降解速率常数最高，为0.0334 min−1 (R2 = 0.8875 min−1)；而在自来水中，当浓度为SO4−2时，TiO2的降解速率常数最高，为0.0481 min−1,R2 = 0.9862)。在ml - q和自来水中，在CO3−2存在的情况下，使用纯TiO2完全去除IPN。除NO3−离子外，在Cl−、CO3−2和SO4−2离子存在下，SnO2的光催化活性在2h后分别为25%、21%和29%。这可能是由于其宽带隙和载流子复合。而在地表水中，ZnO的降解效率最高（kt = 0.0053 min−1,R2 = 0.9272）。基于总有机碳分析的矿化评价显示部分有机碳去除，表明在研究条件下形成了转化产物。

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引用次数: 0