Synthesis of Y2Ti2O5S2 by thermal sulfidation for photocatalytic water oxidation and reduction under visible light irradiation
Synthesis of Y2Ti2O5S2 by thermal sulfidation for photocatalytic water oxidation and reduction under visible light irradiation
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热硫化合成Y2Ti2O5S2用于可见光照射下光催化水氧化还原
DOI：
10.1007/s11164-020-04329-y
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发表时间：
2021
影响因子：
3.3
通讯作者：
Domen Kazunari
中科院分区：
文献类型：
--
作者：
Pan Zhenhua;Yoshida Hiroaki;Lin Lihua;Xiao Qi;Nakabayashi Mamiko;Shibata Naoya;Takata Tsuyoshi;Hisatomi Takashi;Domen Kazunari
y2ti2o5s2的吸收边波长为640 nm，在可见光下作为光催化剂全面分解水。目前，这种材料是用固态反应合成的，需要几天的时间，并产生几十微米大小的颗粒。本工作展示了一种基于H2S流下热硫化的替代合成方法，以获得更小的颗粒。在1423 K下加热几个小时后，前驱体混合物被转化为y2ti2o5s2，尽管所得材料含有一些Y2O2S和TiSxas杂质。y2ti2o5s2初生颗粒呈片状，部分暴露（001）面为基面，而大部分颗粒聚集形成1 ~ 2µm大小的二次颗粒。在Rh、iro2或CoOx负载后，该材料分别在牺牲光催化h2o2演化反应中表现出活性。
Y2Ti2O5S2has an absorption edge wavelength of 640 nm and functions as a photocatalyst for overall water splitting under visible light. At present, this material is synthesized using a solid-state reaction that requires several days and generates particles tens of micrometers in size. The present work demonstrates an alternative synthesis method based on thermal sulfidation under a H2S flow to obtain smaller particles. Using this new process, a precursor mixture was converted into Y2Ti2O5S2after several hours of heating at 1423 K, although the resulting material contained some Y2O2S and TiSxas impurities. The primary Y2Ti2O5S2particles were plate-like and some exposed (001) facets as the basal plane, while the majority aggregated to form secondary particles 1–2 µm in size. After loading with Rh, or with either IrO2or CoOx, this material was active during sacrificial photocatalytic H2and O2evolution reactions, respectively.