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首页> 外文期刊>Applied Catalysis, B. Environmental: An International Journal Devoted to Catalytic Science and Its Applications >Photocatalytic hydrogen production over plasmonic AuCu/CaIn2S4 composites with different AuCu atomic arrangements
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Photocatalytic hydrogen production over plasmonic AuCu/CaIn2S4 composites with different AuCu atomic arrangements

机译：具有不同Aucu原子布置的Plasmonic Aucu / Cain2S4复合材料的光催化氢气生产

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摘要

Plasmonic AuCu bimetallic nanoparticles supported on monoclinic CaIn2S4 have been synthesized through the photoreduction method, by which AuCu bimetallic nanoparticles with different atomic arrangements were site-selectively photo-deposited at the edges of CaIn2S4 surface nanosteps. The obtained plasmonic composites were characterized by XRD, TEM, photoelectrochemical analysis, XPS, UV-vis and PL spectroscopy. The results showed that AuCu bimetallic nanoparticles with alloy structure showed better performance for light absorption, charge separation and photocatalytic activity compared to AuCu core-shell structure. Especially, alloyed Au0.4Cu0.1/CaIn2S4 composite exhibited the highest visible activity for hydrogen production from Na2S/Na2SO3 solution with a rate of 452.8 mu mol/h, over 2.2, 10.0, 63.8 and 76.7 times higher than that of core-shell Cu-0.1/Au-0.4/CaIn2S4, Au-0.3/CaIn2S4, Cu-0.3/CaIn2S4 and CaIn2S4, respectively. The enhanced photocatalytic performance of AuCu/CaIn2S4 composites could be mainly ascribed to the synergistic effect in AuCu bimetallic nanoparticles and the surface plasmon resonance effect of Au.
机译：通过光电方法合成了在单斜替尼CAIN2S4上的等离子体Aucu双金属纳米颗粒，通过光电方法合成，通过该方法，通过该方法，具有不同原子布置的Aucu Bimetallic纳米颗粒在Cain2S4表面纳米杆的边缘处选择性地光沉积。通过XRD，TEM，光电化学分析，XPS，UV-Vis和PL光谱表征获得的等离子体复合材料。结果表明，与Aucu核心壳结构相比，具有合金结构的Aucu Bimetallic纳米粒子表现出更好的光吸收，电荷分离和光催化活性。特别是，合金化AU0.4CU0.1 / CAIN2S4复合材料表现出来自NA2S / NA2SO3溶液的最高可见活性，其速率为452.8μmmol/ h，超过2.2,10.0,63.8和76.7倍高于核心 - 壳Cu-0.1 / Au-0.4 / cain2s4，Au-0.3 / cain2s4，Cu-0.3 / cain2s4和cain2s4。 Aucu / Cain2S4复合材料的增强的光催化性能主要归因于Aucu Bimetallic纳米颗粒和Au的表面等离子体共振效应的协同作用。

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