CHEMICAL ENGINEERING JOURNAL
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2024
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IF 13.3
Rui Li,Shuangjun Li,Luyang Zuo,Xiangping Xiao,Huitao Fan,Bo Li,Liya Wang
The spatial segmentation of photogenerated carriers is crucial for achieving efficient photocatalytic H 2 production (PHP) rates in photocatalyst. Design studies of crystalline catalyst facets and selective morphology control can facilitate the development of catalysts that expose more advantageous active facets. Herein, Cu 2 WS 4 /ZnIn 2 S 4 composites are constructed by growing ZnIn 2 S 4 nanosheets in situ on Cu 2 WS 4 with largely exposed {0 0 1} surface. Experiments and density functional theory calculations demonstrate that the electrons of ZnIn 2 S 4 flowed to the {0 0 1} surface of Cu 2 WS 4 , and the holes vectorially migrated to the {1 0 1} surface, during the reaction process, resulting in efficient spatial separation of the photogenerated carriers. The Cu 2 WS 4 /ZnIn 2 S 4 achieves a PHP rate of 23.67 mmol g −1 h −1 , 13.44-fold increase compared with pure ZnIn 2 S 4 . This report combines the advantages of the high-energy activity of the Cu 2 WS 4 {0 0 1} surface to morphologically control the ratio of the {0 0 1}/{1 0 1} surfaces so that ZnIn 2 S 4 can contact a larger area of the {0 0 1} surface. Furthermore, under the influence of crystallographic effects on the {0 0 1} and {1 0 1} surfaces, electrons and holes of ZnIn 2 S 4 are transferred to different crystalline facets, promoting the redox reaction. This paper provides effective ideas for the rational design of photocatalysts with efficient carrier space separation.
研究领域:
材料科学
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催化化学
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能源科学
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DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2019
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IF 6.361
Huinan Che,Guangbo Che,Pengjie Zhou,Chunbo Liu,Hongjun Dong
It is very challenging to fabricate novel, high-efficiency photocatalysts with an enhanced visible light absorption capacity, high charge carrier separation efficiency, and large specific surface area . For this purpose, a yeast-derived carbon (YC) sphere was added as a charge carrier bridge to the 2D-2D Cu 2 WS 4 /g-C 3 N 4 heterojunction through a facile hydrothermal method . The YC sphere, as a bridge for electrons, is not only advantageous in inhibiting rapid recombination by electrons, but also remarkably enhances the visible light absorption capacity. Moreover, the YC sphere can also increase the specific surface area and surface roughness , which can enhance the adsorption of pollutant molecules and provide abundant active sites for photocatalytic reactions. The g-C 3 N 4 /YC/Cu 2 WS 4 heterojunction showed the best photocatalytic activity for reducing hexavalent chromium Cr(VI) and decomposing tetracycline (TC) under visible light. Meanwhile, the acute toxicity of Daphnia magna (D. magna) gradually decreases with the conversion of Cr(VI) to Cr(III) in solution. In addition, the possible intermediate products and the photocatalytic reaction mechanism are revealed in depth. This work provides a general example for improving the photocatalytic activity of 2D-2D based heterojunctions by introducing a biomass material.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
Small
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2024
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IF 13
Shiyan Fu,Yong Li,Li Shen,Yonglai Chen,Jingxuan Lu,Yonghong Ran,Yazhen Zhao,Hong Tang,Longfei Tan,Qinyang Lin,Yuhui Hao
Unavoidable damage to normal tissues and tumor microenvironment (TME) resistance make it challenging to eradicate breast carcinoma through radiotherapy. Therefore, it is urgent to develop radiotherapy sensitizers that can effectively reduce radiation doses and reverse the suppressive TME. Here, a novel biomimetic PEGylated Cu 2 WS 4 nanozyme (CWP) with multiple enzymatic activities is synthesized by the sacrificing template method to have physical radiosensitization and biocatalyzer-responsive effects on the TME. Experiment results show that CWP can improve the damage efficiency of radiotherapy on breast cancer cell 4T1 through its large X-ray attenuation coefficient of tungsten and nucleus-penetrating capacity. CWP also exhibit strong Fenton-like reactions that produced abundant ROS and GSH oxidase-like activity decreasing GSH. This destruction of redox balance further promotes the effectiveness of radiotherapy. Transcriptome sequencing reveals that CWP induced ferroptosis by regulating the KEAP1/NRF2/HMOX1/GPX4 molecules. Therefore, owing to its multiple enzymatic activities, high-atomic W elements, nucleus-penetrating, and ferroptosis-inducing capacities, CWP effectively improves the efficiency of radiotherapy for breast carcinoma in vitro and in vivo. Furthermore, CWP-mediated radiosensitization can trigger immunogenic cell death (ICD) to improve the anti-PD-L1 treatments to inhibit the growth of primary and distant tumors effectively. These results indicate that CWP is a multifunctional nano-sensitizers for radiotherapy and immunotherapy.
研究领域:
纳米技术
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肿瘤学
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放射生物学
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免疫治疗
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分子生物学
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生物医学工程
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产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2020
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IF 10.652
Runren Jiang,Guanghua Lu,Matthew Nkoom,Zhenhua Yan,Donghai Wu,Jianchao Liu,Tianjian Dang
Developing excellent photocatalysts to mineralize pollutants and reduce toxicity is an urgent problem in current environment purification research. Here, we synthesized a novel 2D/2D Cu 2 WS 4 /BiOCl Z-scheme system by a facile solvent mixing method and characterized the samples by various analytical methods. Compared with 3D/2D, the close contact surface of the 2D/2D catalyst endows it with extremely fast charge transfer and a large number of active sites, a Z-scheme system process strong electronic interaction and efficient charge separation, resulting in the high photocatalytic performance of the 2D/2D Cu 2 WS 4 /BiOCl Z-scheme system. As expected, The 15% 2D/2D Z-scheme Cu 2 WS 4 /BiOCl possessed the highest rate constant 1.14 × 10 −1 min −1 in the degradation of benzophenone-1 (BP1), which are 8, 5 and 4 times greater than that of BiOCl (1.36 × 10 −2 min −1 ), Cu 2 WS 4 (2.27 × 10 −2 min −1 ) and 15% 3D/2D Cu 2 WS 4 /BiOCl (2.6 × 10 −2 min −1 ), respectively. Meanwhile, the practicability of Cu 2 WS 4 /BiOCl was studied by the influence of relevant real water matrix on photocatalytic degradation of BP1. In addition, the result of density functional theory calculations demonstrated that the 2D/2D Cu 2 WS 4 /BiOCl system has faster charge transferability and closer integration than that of the 3D/2D system, which further confirms that the close 2D interface is conducive to charge transfer at the interface. Nine potential degradation products were identified as intermediates, and extremely significant toxicity reduction during the degradation process was confirmed by an ECOSAR prediction and zebrafish acute toxicity test . Compared with gene expression, the hatching rate and survival rate of zebrafish embryo are more sensitive and considered to be better choices for toxicity assessment.
研究领域:
环境科学
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材料科学
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毒理学
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产品关联
DOI
高影响因子
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
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2026
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IF 4.4
Congyang Zou,Jie Tian,Yujie Wang,Ruijie Liu,Minjie Yang
WO 3 /Cu 2 WS 4 heterojunction photocatalyst is fabricated by a solvothermal route. • WO 3 /Cu 2 WS 4 displays strong visible-light photocatalytic activity for gaseous styrene degradation. • Optimized composite delivers better degradation efficiency and reaction kinetics than pure components. • Z-scheme charge transfer mechanism is put forward to interpret the elevated photocatalytic activity. In this work, a Z -scheme heterojunction photocatalyst WO 3 /Cu 2 WS 4 was prepared by loading Cu 2 WS 4 particles on the surface of bulk WO 3 . Under simulated visible light irradiation, the catalyst exhibited excellent photocatalytic oxidation performance toward styrene (200 mg/m 3 ). The optimal WO 3 /CWS-20% composite achieved the highest photocatalytic oxidation efficiency for styrene, with a degradation rate of 97.2% and a corresponding rate constant of 0.03651 min −1 , which was 2.8 and 3.2 times higher than those of pure WO 3 and Cu 2 WS 4 , respectively. Moreover, the material possessed good stability, maintaining 83.4% of its degradation efficiency after four consecutive cycles. The electron transfer and catalytic mechanisms of the catalyst were further investigated via photoelectrochemical measurements. The results indicate that the constructed Z -scheme heterojunction can effectively separate photogenerated charge carriers and facilitate the generation of reactive species such as hydroxyl radicals (·OH) and superoxide anion radicals (·O 2 − ). This work offers a novel strategy for designing high-efficiency heterojunction photocatalysts for the degradation of VOCs under sunlight irradiation. Download: Download high-res image (80KB) Download: Download full-size image
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DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2025
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IF 9.7
Xueying Wang,Jun Luo,Qiaozhi Yan,Yu Shen,Zhuo Liu,Shuai Lu,Changyu Lu,Weilong Shi
The photothermal effect, interfacial bond and internal electric field can effectively regulate the charge transfer of the heterojunction, improving the photocatalytic activity of the catalyst. Herein, we prepared the 1D/2D core–shell CuBi 2 O 4 @Cu 2 WS 4 heterojunction with the photothermal effect of “1 + 1 > 2”, which can effectively degrade tetracycline (TC) and levofloxacin (LVF) through the photothermal synergistic peroxydisulfate (PDS) activation process. Density functional theory (DFT) calculation femtosecond transient (fs-TAS) spectral and temperature control experiment analysis showed that the photothermal effect, S-Cu–O bonding and the internal electric field promoted the transport of photogenerated carriers. Visible light irradiation enables a degradation rate of 81.8 % for TC and 67.6 % for LVF in the photothermal-PDS system using Cu 2 WS 4 /CuBi 2 O 4 , which is 43.8 % and 26.9 % higher than that at 10℃, respectively. In addition, the vulnerable sites of TC molecules were determined by calculating the Fukui index. The ecological risk of TC degradation products was predicted based on the Ecological Structure Activity Relationships (ECOSAR) model, and the bean sprout cultivation experiment further verified the lower environmental risk of TC degradation products. This study provides a novel and feasible strategy for designing and developing photocatalysts for photothermal synergy PDS advanced oxidation process and organic pollutant degradation.
研究领域:
环境科学
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材料科学
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产品关联
DOI
PubMed
高影响因子
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