Hu Miao, Yan Aihua, Huang Ji, Huang Fei, Li Fan, Cui Qiaopeng, Li Qi, Wang Xinyang
Low Carbon Energy Institute, China University of Mining and Technology, Xuzhou 221008, People's Republic of China. School of Materials Science and Engineering, China University of Mining and Technology, Xuzhou 221116, People's Republic of China.
Nanotechnology. 2019 Nov 21;31(10):105202. doi: 10.1088/1361-6528/ab5a1f.
In the last ten years, bismuth oxybromide (BiOBr) has attracted wide attention due to its superior optoelectronic property. However, its practical application still suffers from slow carrier transport and high carrier recombination. Here we report a kind of novel tannum indium sulfide (SnInS)/BiOBr hybrid prepared by a two-step hydrothermal method. The results showed that small amount of SnInS had no influence on the crystal phase of BiOBr, but the morphology could be regulated from nanosheet to nanoflower. Specially, SnInS exerted a slight effect on the light absorption and band gap of BiOBr. Importantly, SnInS/BiOBr hybrids exhibited remarkable enhancement of the photocatalytic activity towards the degradation of rhodamin B (RhB) dye molecules. SnInS/BiOBr-0.20 with 99.8% degradation efficiency had the highest photocatalytic activity within 40 min, while it was only 71.1% for pure BiOBr. The enhanced photocatalytic activity was mainly attributed to efficient interfacial transfer and low carrier recombination. This work will help us understand the photocatalytic mechanism of bismuth oxyhalide hybrids.
在过去十年中，溴氧化铋（BiOBr）因其优异的光电性能而备受关注。然而，其实际应用仍受限于载流子传输缓慢和载流子复合率高的问题。在此，我们报道了一种通过两步水热法制备的新型硫化钐铟（SnInS）/BiOBr复合材料。结果表明，少量的SnInS对BiOBr的晶相没有影响，但可以将其形貌从纳米片调控为纳米花。特别地，SnInS对BiOBr的光吸收和带隙有轻微影响。重要的是，SnInS/BiOBr复合材料对罗丹明B（RhB）染料分子的降解表现出显著增强的光催化活性。降解效率为99.8%的SnInS/BiOBr-0.20在40分钟内具有最高的光催化活性，而纯BiOBr的降解效率仅为71.1%。光催化活性的增强主要归因于有效的界面转移和低载流子复合。这项工作将有助于我们理解卤氧化铋复合材料的光催化机理。
