SiO2 loading combined with high temperature calcination of kesterite Cu2ZnSnS4 nanocrystals towards enhanced photocatalytic H2 evolution
SiO2 loading combined with high temperature calcination of kesterite Cu2ZnSnS4 nanocrystals towards enhanced photocatalytic H2 evolution
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SiO2 负载与锌黄锡矿 Cu2ZnSnS4 纳米晶体的高温煅烧相结合，可增强光催化析氢
DOI：
10.1016/j.ijhydene.2017.06.231
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发表时间：
2017-08
影响因子：
7.2
通讯作者：
Sixin Wu
中科院分区：
文献类型：
--
作者：
Ruifeng Chong;Xinshou Wang;Zhixian Chang;Wenhui Zhou;Sixin Wu
本文采用二氧化硅负载和高温焙烧的方法成功制备了高效光催化析氢催化剂Cu2ZnSnS4(CZTS)。X-射线衍射仪和拉曼光谱分析表明，CZTS是一种具有方锌矿结构的纯相。透射电子显微镜和高分辨电子显微镜表明，CZTS经焙烧后仍能保持纳米尺寸和方锌矿结构。二氧化硅负载是避免CZTS纳米晶在高温焙烧过程中团聚的一种有效方法。随着焙烧温度的升高，CZTS的结晶度增加，但没有明显的尺寸变化，表明CZTS的比表面积没有变化。所有CZTS/SiO_2催化剂均表现出优良的光催化析氢性能。特别是单位质量CZTS的光催化析氢速率显著提高，这主要是由于其分散性好、结晶度提高、高温焙烧时比表面积损失小所致。
In this paper, highly efficient Cu2ZnSnS4(CZTS) towards photocatalytic H2evolution was successfully fabricated by SiO2loading and high temperature calcination. X-ray diffraction (XRD) and Raman shifts revealed CZTS was pure phase with kesterite structure. Transmission electron microscope (TEM) and high resolution TEM showed CZTS could maintain nanoscale size and kesterite structure after being calcined. The SiO2loading was found to be an efficient approach to avoid the aggregation of CZTS nanocrystals during high temperature calcination. As the elevated calcination temperature, the crystallinity of CZTS increased without observable size change, which suggested the no change on the specific surface area. All CZTS/SiO2exhibited superior photocatalytic H2evolution. Especially, the photocatalytic H2evolution rates for per unit mass CZTS was significantly enhanced, which was mainly attributed to the good dispersion, the improved crystallinity and the less loss of specific surface area during high temperature calcination.
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