An orthophosphate semiconductor with photooxidation properties under visible-light irradiation
An orthophosphate semiconductor with photooxidation properties under visible-light irradiation
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DOI：
10.1038/nmat2780
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发表时间：
2010-07-01
期刊：
影响因子：
41.2
通讯作者：
Withers, Ray L.
中科院分区：
文献类型：
--
作者：
Yi, Zhiguo;Ye, Jinhua;Withers, Ray L.
寻找在可见光照射下直接分解水的活性半导体光催化剂仍然是太阳能利用最具挑战性的任务之一（1-6）。在过去的30年里，对这种材料的研究主要集中在金属离子取代，如In（1-x）Ni（x）TaO（4）和（V-; Fe-或Mn-）TiO（2）（参考文献7，8），非金属离子取代如TiO（2-x）N（x）和Sm（2）Ti（2）O（5）S（2）（参考文献9，10）或如（Ga（1-x）Zn（x））（N（1-x）O（x））和ZnS-CuInS（2）-AgInS（2）（参考文献11，12）中的固溶体制造。在这里，我们报告了一个新的使用Ag（3）PO（4）半导体，它可以利用可见光氧化水以及分解水溶液中的有机污染物。这表明其作为用于水分解和废水清洁的光功能材料的潜力。更一般地说，它建议将p区元素和碱金属或碱土金属离子掺入到窄带隙的简单氧化物中，作为设计新的光电极或光催化剂的策略。
The search for active semiconductor photocatalysts that directly split water under visible-light irradiation remains one of the most challenging tasks for solar-energy utilization(1-6). Over the past 30 years, the search for such materials has focused mainly on metal-ion substitution as in In(1-x)Ni(x)TaO(4) and (V-; Fe- or Mn-) TiO(2) (refs 7,8), non-metal-ion substitution as in TiO(2-x)N(x) and Sm(2)Ti(2)O(5)S(2) (refs 9,10) or solid-solution fabrication as in (Ga(1-x)Zn(x))(N(1-x)O(x)) and ZnS-CuInS(2)-AgInS(2) (refs 11,12). Here we report a new use of Ag(3)PO(4) semiconductor, which can harness visible light to oxidize water as well as decompose organic contaminants in aqueous solution. This suggests its potential as a photofunctional material for both water splitting and waste-water cleaning. More generally, it suggests the incorporation of p block elements and alkali or alkaline earth ions into a simple oxide of narrow bandgap as a strategy to design new photoelectrodes or photocatalysts.