One-Pot Synthesis of Anatase, Rutile-Decorated Hydrogen Titanate Nanorods by Yttrium Doping for Solar H2 Production
One-Pot Synthesis of Anatase, Rutile-Decorated Hydrogen Titanate Nanorods by Yttrium Doping for Solar H2 Production
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DOI：
10.1021/acsomega.0c02855
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发表时间：
2020-08
期刊：
影响因子：
4.1
通讯作者：
Sovann Khan;H. Ikari;Norihiro Suzuki;K. Nakata;C. Terashima;A. Fujishima;Ken‐ichi Katsumata;V. Rodríguez-González
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文献类型：
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作者：
Sovann Khan;H. Ikari;Norihiro Suzuki;K. Nakata;C. Terashima;A. Fujishima;Ken‐ichi Katsumata;V. Rodríguez-González
采用微波辅助水热法制备了钇掺杂的钛酸氢纳米棒。Y掺杂的HTN表现出更好的光催化活性，为H2的演变和染料分解。H2生产从甲醇-水溶液在UV-可见光下7小时，提高了5.5倍，1重量%的Y-掺杂。Y3+离子的掺杂使HTN的带隙减小了约0.28 eV，并诱导了新的金红石和金红石相。Y掺杂的高介电常数归因于增强的光吸收（更小的带隙）和有效的电荷分离（异质结）。为了优化H2的产生，进行了一系列实验来检查掺杂浓度和非贵金属表面金属（例如，Ni、Cu、Co）负载。本工作中的Y掺杂是通过一锅法制备HTN/金红石/金红石异质结构来合成高活性HTN的一种新的和有前途的方法。
We have prepared yttrium (Y)-doped hydrogen titanate nanorods (HTN) by a microwave-assisted hydrothermal method. Y-doped HTN showed much improved photocatalytic activities for both H2 evolution and dye decomposition. H2 production from a methanol–water solution under UV–visible light for 7 h was enhanced by a factor of 5.5 with 1 wt % Y-doping. Doping with Y3+ ions reduced the band gap of HTN by ∼0.28 eV and induced new phases of anatase and rutile. High photocatalysis by Y-doping was attributed to enhanced light absorption (smaller band gap) and effective charge separation (heterojunction). To optimize H2 production, a series of experiments examining effects of doping concentrations and non-noble surface metal (e.g., Ni, Cu, Co) loading were carefully performed. Y-doping in this work is a new and promising approach for synthesizing highly active HTN by producing the HTN/rutile/anatase heterostructure within the one-pot method.