Journal of Photochemistry and Photobiology A-chemistry最新文献_第6页

Growth of dendritic CuS nanostructures for photoacoustic image guided Chemo-Photothermal therapy 用于光声图像引导化疗-热疗的树枝状 CuS 纳米结构的生长

IF 4.1 3区化学 Q2 CHEMISTRY, PHYSICAL

Journal of Photochemistry and Photobiology A-chemistry

Pub Date : 2024-10-15 DOI: 10.1016/j.jphotochem.2024.116084

A. Gangwar , Sonali Gupta , Jagriti Gupta , Bijaideep Dutta , Neha Dubey , Sandeep B. Shelar , N. Singh , S.K. Biswas , P.A. Hassan , K.C. Barick

Herein, we report a unique method for design and development of carboxyl enriched dendritic CuS nanostructures (CuS NSs) for photoacoustic image guided chemo-photothermal therapy. The dendritic network was grown on the surface of CuS nanoparticles via layer-by-layer assembly of amino acid. XRD and TEM studies established the formation of crystalline well-spherical nanosized hexagonal covellite (CuS) phase. The successful growth of dendritic structure was apparent from the rise in surface charge, hydrodynamic diameter and characteristic vibrational band intensity of peptide bonds. The developed different generations of dendritic CuS NSs (D⁰-CuS NSs, D¹-CuS NSs, D²-CuS NSs and D³-CuS NSs) displayed wide-ranging absorption band in near infrared (NIR) zone and exhibited good photothermal heating efficacy upon irradiation of 980 nm laser light. From in-vitro cellular studies, it has been found that the NIR irradiation effectively enhanced the photothermal toxicity of D³-CuS NSs towards cancer cells. Moreover, these negatively charged water-dispersible D³-CuS NSs were conjugated with positively charged anticancer drug, doxorubicin hydrochloride (DOX) through electrostatic interaction. The DOX loaded D³-CuS NSs (DOX@D³-CuS NSs) revealed pH dependent drug release behaviour and their considerable uptake in breast cancer cells (MCF-7). Further, DOX@D³-CuS NSs exhibited a much higher toxicity towards cancer cells upon NIR light over individual counterparts suggesting their strong ability for chemo-photothermal therapy. Moreover, these biocompatible CuS NSs have shown excellent concentration dependent photoacoustic properties at pulse laser excitation (850 nm) and thus, they can be found potential application in chemo-photothermal therapy.

在此，我们报告了一种设计和开发富含羧基的树枝状 CuS 纳米结构（CuS NSs）的独特方法，用于光声图像引导的化学光热疗法。树枝状网络是通过逐层组装氨基酸在 CuS 纳米粒子表面生长出来的。XRD 和 TEM 研究证实形成了结晶性良好的球形纳米六方珂罗版石（CuS）相。从表面电荷、流体力学直径和肽键特征振带强度的增加可以明显看出树枝状结构的成功生长。开发出的不同代树枝状 CuS NSs（D0-CuS NSs、D1-CuS NSs、D2-CuS NSs 和 D3-CuS NSs）在近红外（NIR）区显示出广泛的吸收带，并在 980 纳米激光照射下表现出良好的光热加热功效。体外细胞研究发现，近红外辐照可有效增强 D3-CuS NSs 对癌细胞的光热毒性。此外，这些带负电荷的水分散性 D3-CuS NSs 通过静电作用与带正电荷的抗癌药物盐酸多柔比星（DOX）共轭。载入 DOX 的 D3-CuS NSs（DOX@D3-CuS NSs）显示出依赖于 pH 值的药物释放行为及其在乳腺癌细胞（MCF-7）中的大量吸收。此外，在近红外光下，DOX@D3-CuS NSs 对癌细胞的毒性远高于单独的同类产品，这表明它们具有很强的化学光热治疗能力。此外，这些具有生物相容性的 CuS NSs 在脉冲激光激发（850 纳米）下表现出卓越的浓度依赖性光声特性，因此，它们在化疗光热疗法中具有潜在的应用前景。

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引用次数: 0

Synthesis, Characterization of KNb0.99Eu0.01O3 and improved Photo-catalytic H2-Production on Ag/La2NiO4/ KNb0.99Eu0.01O3 hetero-junction KNb0.99Eu0.01O3 的合成、表征以及 Ag/La2NiO4/ KNb0.99Eu0.01O3 异质结的光催化 H2 产率改进

IF 4.1 3区化学 Q2 CHEMISTRY, PHYSICAL

Journal of Photochemistry and Photobiology A-chemistry

Pub Date : 2024-10-15 DOI: 10.1016/j.jphotochem.2024.116094

R. Mekersi , S. Boumaza , A. Bahdaouia , S. Benallal , A. Boudjemaa , M. Trari

The perovskite KNb_0.99Eu_0.01O₃ prepared by nitrate combustion is applied as a hydrogen photocathode in heterojunction with La₂NiO₄ under visible light. The XRD pattern confirms the formation of KNb_0.99Eu_0.01O₃ structure with orthorhombic single phase. The SEM images present grains between 0.2 and 0.4 µm while the optical band gap (3.14 eV) is calculated from the diffuse reflectance. Under illumination, the cyclic voltammetry (CV) and the capacitance measurements in Na₂SO₄ electrolyte show an increased current below ∼ -0.7 V vs. Ag/AgCl and p-type behavior with a conduction band (CB = −1.95 V) cathodically positioned with respect to H₂ level, thus leading to H₂ photo-production. The hetero-system La₂NiO₄/KNb_0.99Eu_0.01O₃ shows a much higher activity than KNb_0.99Eu_0.01O₃ where efficient H₂-photoevolution occurs with concomitant oxidation of S₂O₃²⁻, as reducing agent. So, the co-junction of La₂NiO₄ with KNb_0.99Eu_0.01O₃ facilitates the charge transfer and increases the reaction efficiency. At neutral pH, the H₂ evolution rate for the photocatalysts KNb_0.99Eu_0.01O₃ and La₂NiO₄/ KNb_0.99Eu_0.01O₃ are 11.15 and 57 µmol g⁻¹ min⁻¹; respectively. Further enhancement is observed with Ag-loaded La₂NiO₄/KNb_0.99Eu_0.01O₃, reaching a maximum hydrogen production rate of 67 µmol g⁻¹ min⁻¹, attributed to the lower overpotential introduced by Ag. These findings highlight the potential of the ternary system Ag/La₂NiO /KNb_0.99Eu_0.01O₃ as an efficient photocathode for H₂ generation.

通过硝酸盐燃烧制备的过氧化物 KNb0.99Eu0.01O3 与 La2NiO4 异质结在可见光下用作氢气光电阴极。XRD 图谱证实了 KNb0.99Eu0.01O3 结构为正交单相。扫描电子显微镜图像显示出 0.2 至 0.4 微米之间的晶粒，而光带隙（3.14 eV）是通过漫反射计算得出的。在照明条件下，Na2SO4 电解液中的循环伏安法（CV）和电容测量结果表明，相对于 Ag/AgCl 而言，电流在 ∼ -0.7 V 以下时会增大，并且具有 p 型行为，导带（CB = -1.95 V）相对于 H2 水平阴极定位，从而导致 H2 光生。异质系统 La2NiO4/KNb0.99Eu0.01O3 的活性远高于 KNb0.99Eu0.01O3，在异质系统中，H2-光解与作为还原剂的 S2O32- 的氧化同时发生。因此，La2NiO4 与 KNb0.99Eu0.01O3 的共结合促进了电荷转移，提高了反应效率。在中性 pH 值下，KNb0.99Eu0.01O3 和 La2NiO4/ KNb0.99Eu0.01O3 光催化剂的 H2 演化率分别为 11.15 和 57 µmol g-1 min-1。Ag 负载的 La2NiO4/KNb0.99Eu0.01O3 的产氢率进一步提高，达到 67 µmol g-1 min-1 的最大产氢率，这归功于 Ag 带来的较低过电位。这些发现凸显了 Ag/La2NiO /KNb0.99Eu0.01O3 三元体系作为高效光阴极产生氢气的潜力。

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引用次数: 0

Induced of axial chirality in near-infrared-absorbing ball-shaped ruthenium complexes 诱导近红外吸收球形钌络合物的轴向手性

IF 4.1 3区化学 Q2 CHEMISTRY, PHYSICAL

Journal of Photochemistry and Photobiology A-chemistry

Pub Date : 2024-10-12 DOI: 10.1016/j.jphotochem.2024.116089

Yoshitaka Shinokubo , Ryo Arai , Tatsuya Nishimura , Katsuhiro Maeda , Hajime Maeda , Masahito Segi , Taniyuki Furuyama

Ball-shaped metal complexes that absorb in the near-infrared (NIR) region can be synthesized in a single step. Although stereogenic-at-metal complexes have been obtained, the induction of axial chirality has not yet been demonstrated. In this study, NIR-absorbing ball-shaped ruthenium complexes with axial chirality were facilely synthesized using asymmetric diiminoisoindoline derivatives. Despite lacking a discrete point chiral moiety, these complexes exhibited molecular chirality. The incorporation of bulky substituents facilitated enantiomeric differentiation. High-performance liquid chromatography (HPLC) with a chiral column enabled the isolation of the pure enantiomers as stable compounds. The absolute configurations of these isomers were revealed using vibrational circular dichroism (VCD) spectroscopy. The characteristic peaks originating from ligand vibrations exhibited distinct mirror images, and the experimental spectra were well reproduced by theoretical calculations. This methodology has broad applicability for the development of chiral ball-shaped metal complexes as NIR materials.

在近红外（NIR）区域具有吸收能力的球形金属络合物可以一步合成。虽然已经获得了具有立体性的金属络合物，但轴向手性的诱导尚未得到证实。本研究利用不对称的二亚氨基异吲哚啉衍生物轻松合成了具有轴向手性的近红外吸收球形钌配合物。尽管缺乏离散的点手性分子，但这些配合物显示出分子手性。大块取代基的加入促进了对映体的区分。使用手性色谱柱的高效液相色谱法（HPLC）可以分离出稳定的纯对映体化合物。利用振动圆二色性光谱（VCD）揭示了这些异构体的绝对构型。配体振动产生的特征峰呈现出明显的镜像，理论计算也很好地再现了实验光谱。这种方法对于开发作为近红外材料的手性球形金属配合物具有广泛的适用性。

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引用次数: 0

Far-red active squaraine dye-sensitized photoanode for dye-sensitized solar cells with a copper (II/I) electrolyte 用于铜 (II/I) 电解质染料敏化太阳能电池的远红活性方碱染料敏化光阳极

IF 4.1 3区化学 Q2 CHEMISTRY, PHYSICAL

Journal of Photochemistry and Photobiology A-chemistry

Pub Date : 2024-10-12 DOI: 10.1016/j.jphotochem.2024.116086

Indrajeet S. Nawghare , Shivdeep Suresh Deshmukh , Krati Joshi , Sailaja Krishnamurty , Kothandam Krishnamoorthy , Jayaraj Nithyanandhan

In dye-sensitized solar cells (DSSC), controlling the dye-aggregation on TiO₂ and charge recombination between electrons present in TiO₂ and electrolyte can be achieved by wrapping the long alkyl groups around the dye structure and further introducing bulky donor on the dye is a potential approach to enhance both the open-circuit potential and short-circuit current parameters. Additionally, bulky donor containing dye structures modulates the photophysical and electrochemical properties of the sensitizer which helps reducing the over potentials required for the dye regeneration process by utilizing a multidentate ligand containing [Cu(tme)]^2+/+ and I⁻/I₃⁻ redox electrolytes. Hagfeldt donor appended far-red NIR active unsymmetrical squaraine dye (SQ-HF) has been designed, synthesized, and characterized. SQ-HF dye showed an intense absorption at 676 nm (ε 1.7 × 10⁵ M⁻¹cm⁻¹). Photophysical and electrochemical studies indicated that the LUMO and HOMO energy levels of the SQ-HF dye were suited for charge injection (from the LUMO of the dye to the conduction band of TiO₂) and dye-regeneration processes, respectively. The DSSC device efficiency of 5.15 % (J_SC of 10.83 mA/cm² and V_OC of 0.690 V) has been achieved for SQ-HF dye by utilizing a literature reported [Cu(tme)]^2+/+ and 4.11 % (J_SC of 8.74 mA/cm² and V_OC of 0.702 V) in I⁻/I₃⁻ redox shuttles, respectively.

在染料敏化太阳能电池（DSSC）中，控制二氧化钛上的染料聚集以及二氧化钛中的电子与电解质之间的电荷重组，可以通过在染料结构上缠绕长烷基并在染料上进一步引入大块供体来实现，这是一种提高开路电位和短路电流参数的潜在方法。此外，含有大块供体的染料结构还能调节敏化剂的光物理和电化学性质，通过利用含有[Cu(tme)]2+/+和 I-/I3- 氧化还原电解质的多叉配体，有助于降低染料再生过程所需的过电位。我们设计、合成并表征了哈格菲尔德供体附加远红外线近红外活性不对称鳞片染料（SQ-HF）。SQ-HF 染料在 676 纳米波长处有强烈吸收（ε 1.7 × 105 M-1cm-1）。光物理和电化学研究表明，SQ-HF 染料的 LUMO 和 HOMO 能级分别适合电荷注入（从染料的 LUMO 到 TiO2 的导带）和染料再生过程。通过利用文献报道的[Cu(tme)]2+/+和 I-/I3- 氧化还原穿梭器，SQ-HF 染料的 DSSC 器件效率分别达到了 5.15%（JSC 为 10.83 mA/cm2，VOC 为 0.690 V）和 4.11%（JSC 为 8.74 mA/cm2，VOC 为 0.702 V）。

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引用次数: 0

Thionation of conjugated porphyrin with enhanced photodynamic and photothermal effects for cancer therapy 硫离子化共轭卟啉，增强癌症治疗的光动力和光热效应

IF 4.1 3区化学 Q2 CHEMISTRY, PHYSICAL

Journal of Photochemistry and Photobiology A-chemistry

Pub Date : 2024-10-12 DOI: 10.1016/j.jphotochem.2024.116085

Simiao Tong , Yifan Cheng , Hongjie Liu , Yudong Pang , Xiao Lin , Zhiyuan Hu , Fengshou Wu

Phototherapy has emerged as a promising modality for cancer treatment in recent years, owing to its precise temporal control and minimally invasive nature. Here, two new organic porphyrin molecules, denoted as ONP and SNP, were designed and synthesized with an acceptor–donor–acceptor (A-D-A) architecture. The donor–acceptor (D-A) pairs in molecules facilitated the intermolecular charge transfer (ICT), thereby amplifying near-infrared (NIR) absorbance and promoting nonradiative heat generation. Notably, the substitution of oxygen atoms with sulfur in naphthalimides (NI) led to significant change of their photophysical and photochemical properties. Specifically, the sulfur atoms exhibited pronounced spin–orbit coupling (SOC) effect, leading to efficient photoinduced intersystem crossing (ISC) processes, thus facilitating the generation of reactive oxygen species (ROS). Upon self-assembly, the formed nanomaterials (ONP NPs and SNP NPs) exhibited spherical morphology with average size about 150 nm. The biocompatibility and photocytotoxicity of nanoparticles against Hepa1-6 cells were evaluated using the CCK-8 assay. Additionally, the synergistic effects (photodynamic therapy and photothermal therapy) of SNP NPs were confirmed through diverse in vitro experiment under 690 nm laser irradiation. The generation of intracellular ROS by SNP NPs was confirmed with DCFH-DA as probe. This study provides an ingenious strategy for developing organic nanomaterials with high treatment efficiency through synergistic photodynamic/photothermal effects.

近年来，光疗因其精确的时间控制和微创性而成为一种前景广阔的癌症治疗方式。本文设计并合成了两种新型有机卟啉分子，分别称为 ONP 和 SNP，具有受体-供体-受体（A-D-A）结构。分子中的供体-受体（D-A）对促进了分子间电荷转移（ICT），从而放大了近红外（NIR）吸收率并促进了非辐射热的产生。值得注意的是，用硫取代萘二甲酰亚胺（NI）中的氧原子会显著改变其光物理性质和光化学性质。具体来说，硫原子表现出明显的自旋轨道耦合（SOC）效应，导致高效的光诱导系统间交叉（ISC）过程，从而促进了活性氧（ROS）的生成。自组装后形成的纳米材料（ONP NPs 和 SNP NPs）呈现球形形态，平均尺寸约为 150 nm。利用 CCK-8 试验评估了纳米颗粒的生物相容性和对 Hepa1-6 细胞的光细胞毒性。此外，在 690 纳米激光照射下进行的多种体外实验证实了 SNP NPs 的协同效应（光动力疗法和光热疗法）。用 DCFH-DA 作为探针证实了 SNP NPs 在细胞内产生的 ROS。这项研究为通过光动力/光热协同效应开发高效治疗的有机纳米材料提供了一种巧妙的策略。

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引用次数: 0

A novel merocyanine photoacid for visible light-controlled pH modulation 用于可见光控制 pH 值调节的新型美拉尼光酸

IF 4.1 3区化学 Q2 CHEMISTRY, PHYSICAL

Journal of Photochemistry and Photobiology A-chemistry

Pub Date : 2024-10-12 DOI: 10.1016/j.jphotochem.2024.116081

Rajib Choudhury , Trevor Martin , Natalie Buie , Brian Walker , Jocelyn Dong

Merocyanine-based photoacids generate high proton concentrations under visible light irradiation. In the past decade, it has been established that these photoacids offer significant advantages over photoacid generators (PAGs) and hydroxyaryl photoacids, enabling better spatiotemporal control of proton transfer reactions in bulk media. In this study, we modified the core structure of the first generation of meroyanine photoacids. We developed a novel photoacid with color tuning capabilities and high solubility in polar organic solvents. Specifically, by incorporating a cationic benzoindolium moiety as an acceptor, we have altered the photoacid’s light absorption properties. Unlike the first generation of indolium-based merocyanine photoacids, this photoacid can now be activated with green light (λ_max = 525 nm) as well as blue (λ_max = 450 nm) and ultraviolet (λ_max = 365 nm) lights. Furthermore, the novel photoacid exhibits high photo stability, photo-acidity (Π = 3.28 ± 0.08) and moderate reverse reaction rate (k = 1.08 × 10⁻³ ± 0.00017 s⁻¹) in solution. We envision that with improved color tuning capabilities, this class of photoacids will be a more versatile tool for controlling proton-induced reactions in different systems, including biological reactions.

基于 Merocyanine 的光酸可在可见光照射下产生高浓度的质子。在过去的十年中，这些光酸与光酸发生器（PAGs）和羟基芳基光酸相比具有显著的优势，能够更好地对大量介质中的质子转移反应进行时空控制。在这项研究中，我们修改了第一代美罗亚尼光酸的核心结构。我们开发出了一种新型光酸，它具有颜色调节能力和在极性有机溶剂中的高溶解性。具体来说，通过加入阳离子苯并吲哚鎓分子作为受体，我们改变了光酸的光吸收特性。与第一代基于吲哚的美蓝光酸不同，这种光酸现在可以用绿光（λmax = 525 nm）以及蓝光（λmax = 450 nm）和紫外光（λmax = 365 nm）激活。此外，这种新型光酸在溶液中具有很高的光稳定性、光酸度（Π = 3.28 ± 0.08）和适中的反向反应速率（k = 1.08 × 10-3 ± 0.00017 s-1）。我们设想，随着颜色调节能力的提高，这类光酸将成为控制不同系统（包括生物反应）中质子诱导反应的一种用途更广的工具。

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引用次数: 0

Exploring nitro-Tröger’s bases for ct-DNA and HSA sensing: An experimental and theoretical study 探索硝基特罗格碱基的ct-DNA和HSA传感：实验和理论研究

IF 4.1 3区化学 Q2 CHEMISTRY, PHYSICAL

Journal of Photochemistry and Photobiology A-chemistry

Pub Date : 2024-10-11 DOI: 10.1016/j.jphotochem.2024.116082

Eduam Oliveira Boeira , Victória Goulart Isoppo , Bruno Bercini de Araújo , Isadora Tisoco , Lilian Camargo da Luz , Otávio Augusto Chaves , Paulo Fernando Bruno Gonçalves , Bernardo Almeida Iglesias , Angélica Venturini Moro , Fabiano Severo Rodembusch

In this study, we present Tröger’s base analogs synthesized through condensation between p-formaldehyde and methyl-nitro-anilines in good yields. Tröger’s bases exhibit absorption peaks around 350 nm attributed to allowed ππ* electronic transitions. The fluorescence emission at 380 nm showed no correlation with the position of the nitro group. Spectroscopic analyses employing UV–Vis absorption, steady-state fluorescence emission, and molecular docking calculations revealed that these Tröger’s bases interact effectively with ct-DNA and human serum albumin (HSA). These findings suggest that this class of compounds might serve as promising optical sensors for biomacromolecules.

在本研究中，我们介绍了通过对甲醛和甲基硝基苯胺缩合合成的特罗格氏碱类似物，产量很高。特罗格氏碱在 350 nm 附近出现吸收峰，这归因于允许的 ππ* 电子转变。380 纳米波长处的荧光发射与硝基的位置无关。利用紫外可见吸收、稳态荧光发射和分子对接计算进行的光谱分析显示，这些特罗格氏碱能与ct-DNA 和人血清白蛋白（HSA）有效地相互作用。这些研究结果表明，这类化合物有可能成为有前途的生物大分子光学传感器。

引用次数: 0

Enhanced photocatalytic degradation of Bisphenol A under visible light by Cr-TiO2 nanoparticles Cr-TiO2 纳米粒子在可见光下增强双酚 A 的光催化降解能力

IF 4.1 3区化学 Q2 CHEMISTRY, PHYSICAL

Journal of Photochemistry and Photobiology A-chemistry

Pub Date : 2024-10-10 DOI: 10.1016/j.jphotochem.2024.116079

Angeles Mantilla , Enrique Samaniego Benitez , Isaac Montes Valenzuela , Guadalupe Romero Ortiz , Sandra Cipagauta Díaz , Luis Lartundo Rojas , Francisco Javier Tzompantzi Morales , Michelle Navarrete Magaña

In this study, Cr-TiO₂ nanoparticles were synthesized using the sol–gel method, with TiO₂ photocatalyst doped varying Cr concentration. The photocatalysts were assessed for their efficacy in degrading Bisphenol-A under visible light (40 W, 3000 lm, and λ = 400–700 nm, with two maximum peaks at 450 and 545 nm). Optical, morphological, and structural characterization were conducted. TiO₂ doped with 1 % Cr exhibited a remarkable 99 % reduction in BPA degradation within 4 h, compared to the 51.5 % degradation observed with bare TiO₂. This enhancement can be attributed to synergistic effects arising from increased surface area, reduced particle size, and the semi-spherical, uniform morphology of the nanoparticles. Photoluminescence analysis revealed that Cr ion incorporation slowed the recombination processes between photogenerated electron/hole pairs. XPS and Eg data facilitated the calculation of VB and CB values, indicating that the photocatalysts predominantly oxidize the BPA molecule through superoxide (

O_{2}^{∙ -}

) and hydroxyl (

{HO}^{∙}

) radicals.

本研究采用溶胶-凝胶法合成了铬-二氧化钛纳米粒子，并在二氧化钛光催化剂中掺入了不同浓度的铬。评估了光催化剂在可见光（40 W，3000 lm，λ = 400-700 nm，在 450 和 545 nm 处有两个最大峰值）下降解双酚 A 的功效。对其进行了光学、形态和结构表征。与裸 TiO2 的 51.5% 降解率相比，掺杂了 1% Cr 的 TiO2 在 4 小时内显著降低了 99% 的双酚 A 降解率。这种增强作用可归因于纳米颗粒表面积增大、粒径减小以及半球形均匀形态所产生的协同效应。光致发光分析表明，铬离子的加入减缓了光生电子/空穴对之间的重组过程。XPS 和 Eg 数据有助于计算 VB 和 CB 值，表明光催化剂主要通过超氧化物（O2∙-）和羟基（HO∙）自由基氧化双酚 A 分子。

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引用次数: 0

Photocatalytic H2 evolution over MnCoSe2 decorated red phosphorus with S-scheme charge transfer route 用 S 型电荷转移路线在 MnCoSe2 装饰的红磷上光催化 H2 演化

IF 4.1 3区化学 Q2 CHEMISTRY, PHYSICAL

Journal of Photochemistry and Photobiology A-chemistry

Pub Date : 2024-10-10 DOI: 10.1016/j.jphotochem.2024.116051

Jiale Wang , Jingzhuo Tian , Jun Fan , Haipeng Teng , Enzhou Liu

The improvement of charge separation and utilization efficiency plays a vital role in attaining efficient photocatalytic conversion processes. In this study, MnCoSe₂/RP heterojunctions were synthesized using the hydrothermal method and solvent evaporation method. The investigation indicates that the H₂ evolution rate (r_H2) of 3 wt% MnCoSe₂/RP can reach up to 2223.9 μmol·g⁻¹·h⁻¹ in 0.35 M Na₂S/0.25 M Na₂SO₃ solution, which is 9.3 and 19.5 times higher than those of the RP (214.8 μmol·g⁻¹·h⁻¹) and MnCoSe₂ (108.4 μmol·g⁻¹·h⁻¹), respectively, as well as better than that of 3 wt% MnSe₂/RP and 3 wt% CoSe₂/RP prepared under similar conditions. This enhancement is ascribed to the synergistic promoting effect exerted by Co and Mn, leading to fast photoelectric response, low charge transfer resistance, efficient electron-hole separation capability, and suitable H₂ evolution overpotential. Besides, it is found that the charge transfer between MnCoSe₂ and RP follow S-scheme route, which can maintain the active electrons and holes with good redox properties. Furthermore, the r_H2 can be further improved by adding appropriate amount of (NH₄)₂HPO₄, which can induce more H⁺ for H₂ evolution by HPO₄⁻ dissociation. Overall, this work shows that transition metal selenide can be a good candidate to form RP-based S-scheme photocatalyst for solar photocatalysis.

提高电荷分离和利用效率对于实现高效光催化转换过程至关重要。本研究采用水热法和溶剂蒸发法合成了 MnCoSe2/RP 异质结。研究表明，在 0.35 M Na2S/0.25 M Na2SO3 溶液中，3 wt% MnCoSe2/RP 的 H2 演化率（rH2）可达 2223.9 μmol-g-1-h-1，分别是 RP 和 MnCoSe2/RP 的 9.3 倍和 19.5 倍。5 倍，也优于在类似条件下制备的 3 wt% MnSe2/RP 和 3 wt% CoSe2/RP。这种增强归因于 Co 和 Mn 发挥的协同促进作用，导致了快速的光电响应、低电荷转移电阻、高效的电子-空穴分离能力和合适的 H2 演化过电位。此外，研究还发现 MnCoSe2 与 RP 之间的电荷转移遵循 S 型路线，可保持活性电子和空穴，具有良好的氧化还原特性。此外，通过添加适量的 (NH4)2HPO4，可进一步提高 rH2，从而诱导更多的 H+ 通过 HPO4- 解离进化出 H2。总之，这项研究表明，过渡金属硒可以很好地形成基于 RP 的 S 型光催化剂，用于太阳能光催化。

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引用次数: 0

A novel colorimetric-fluorometric probe for detectation of hydrogen sulfide and bisulfite 用于检测硫化氢和亚硫酸氢的新型比色-荧光探针

IF 4.1 3区化学 Q2 CHEMISTRY, PHYSICAL

Journal of Photochemistry and Photobiology A-chemistry

Pub Date : 2024-10-10 DOI: 10.1016/j.jphotochem.2024.116074

Jiajia Chen, Mengyao Yuan, Yanjin Wang, Miaoyu Wang, Kuoxi Xu

A novel fluorescent probe was developed for simultaneously detection of hydrogen sulfide and bisulfite. The probe underwent remarkable turn on fluorescence response and significantly different UV–vis spectral changes in the presence of hydrogen sulfide or bisulfite with different response rates. As a result, this probe could be a potential candidate for imaging of hydrogen sulfide and bisulfite in vivo.

开发了一种新型荧光探针，用于同时检测硫化氢和亚硫酸氢盐。在硫化氢或亚硫酸氢盐存在时，该探针的荧光响应明显开启，紫外-可见光谱的变化也明显不同，且响应速度不同。因此，该探针有可能成为体内硫化氢和亚硫酸氢盐成像的候选探针。

引用次数: 0