Photonic crystal structural-induced Cu3SnS4/Ti3+-TiO2 p-n coaxial heterojunction arrays for light-driven H-2 production and pollutant degradation
Photonic crystal structural-induced Cu3SnS4/Ti3+-TiO2 p-n coaxial heterojunction arrays for light-driven H-2 production and pollutant degradation
复制标题
光子晶体结构诱导的 Cu3SnS4/Ti3 -TiO2 p-n 同轴异质结阵列用于光驱动 H-2 生产和污染物降解
DOI：
10.1016/j.matdes.2017.08.017
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发表时间：
2017
影响因子：
8.4
通讯作者：
Wang Cheng-Wei
中科院分区：
文献类型：
--
作者：
Li Yan;Chang Yin;Liu Fang-Ting;Zhao Yun;Wang Jian;Wang Cheng-Wei
将n型Ti 3+自掺杂TiO 2光子晶体结构与p型三元半导体Cu 3SnS 4相结合，设计了一种新型光子晶体结构诱导p-n同轴异质结阵列（CTS/Ti 3 +-PhC-TNAs），并采用周期脉冲阳极氧化结合原位自组装技术成功制备了该阵列。优化CTS/Ti 3 +-PhC-TNAs的结构和Ti 3+掺杂比例后，在模拟太阳光照射下，CTS/Ti 3 +-PhC-TNAs的光催化活性分别为159.29 ± 1.7 μmol·h-1·m-2和0.08308 h-1·m-2，可用于光催化产氢和有机污染物的去除。分别是PhC-TNAs的9.4倍和3.1倍。研究表明，CTS/Ti 3 +-PhC-TNAs的光催化活性提高主要是由于光生电子-空穴在p-n异质结界面的加速分离、电子沿同轴异质结阵列的沿着转移以及独特设计的光子晶体复合结构增强了光捕获能力。该研究表明，引入Cu 3SnS 4与光子晶体结构的TiO 2形成p-n同轴异质结阵列，可显著提高光催化活性，为设计和制备新型薄膜光催化剂提供了新的手段，可用于高效的太阳能转化和光降解。
By combining the n-type Ti3 +self-doped TiO2photonic crystal structure with p-type ternary semiconductor Cu3SnS4, a new potential nanostructure of photonic crystal structural-induced p-n coaxial heterojunction arrays (denoted as CTS/Ti3 +-PhC-TNAs) was designed and successfully fabricated by periodic pulse anodic oxidation combined with in-situ self-assembly technique. To be used in photocatalytic H2production and organic pollutant removal after optimizing both the structure and Ti3 +doping ratio, CTS/Ti3 +-PhC-TNAs exhibited significantly enhanced photocatalytic activities of 159.29 ± 1.7 μmol·h− 1·m− 2for H2evolution and 0.08308 h− 1·m− 2for methyl orange degradation under simulated sunlight irradiation, which is 9.4 and 3.1 times higher than that of the PhC-TNAs. Detailed investigations revealed that the improved photoactivity of CTS/Ti3 +-PhC-TNAs can be attributed to the accelerated photogenerated electron-hole separation at p-n heterojunction interfaces, the facilitated electron transfer along the coaxial heterojunction arrays and the enhanced light-harvesting through the unique designed photonic crystal composite structure as well. The present study shows a new insight and significantly improvement of photoactivity when Cu3SnS4is introduced to form a p-n coaxial heterojunction arrays with photonic crystal structured TiO2, which provides a new means to design and fabricate novel film photocatalyst for high efficient solar energy conversion and photodegradation.