一步水热法简便制备具有优异光催化活性的(SrBi)BiO/SnO异质结
Facile One-Step Hydrothermal Fabrication of (SrBi)BiO/SnO Heterojunction with Excellent Photocatalytic Activity.
作者信息
Zhu Di, Wang Xinling, An Huiting, Zhong Yan, Wang Dianhui, Tang Chengying, Hu Chaohao
机构信息
School of Materials Science and Engineering, Guilin University of Electronic Technology, Guilin 541004, China.
Guangxi Key Laboratory of Information Materials, Guilin University of Electronic Technology, Guilin 541004, China.
出版信息
Nanomaterials (Basel). 2020 Feb 13;10(2):321. doi: 10.3390/nano10020321.
The pyrochlore-type (SrBi)BiO (SBO), containing Bi and Bi mixed valent states, was recently found to be used as a new visible light responsive photocatalyst. Novel SBO/SnO heterostructured composites were synthesized through a facile one-step hydrothermal method. The phase structure, morphology, chemical composition, and optical properties of the obtained samples were characterized by XRD, SEM, TEM, XPS, and UV-vis DRS. Compared to pure SBO and SnO, the synthesized SBO/SnO composites exhibited significantly enhanced photocatalytic efficiency. The results indicated that the photoinduced holes and superoxide radicals play a dominant role and are the main reactive species during the degradation of Methylene Blue (MB) solution under visible light irradiation. Heterojunctions, formed in samples, directly contribute to the improvement of photocatalytic efficiency of SBO/SnO composites, since it not only broadens the light response range, but also accelerates the separation of photogenerated carriers.
含有Bi和Bi混合价态的烧绿石型(SrBi)BiO(SBO)，最近被发现可作为一种新型的可见光响应光催化剂。通过简便的一步水热法合成了新型SBO/SnO异质结构复合材料。采用XRD、SEM、TEM、XPS和UV-vis DRS对所得样品的相结构、形貌、化学成分和光学性质进行了表征。与纯SBO和SnO相比，合成的SBO/SnO复合材料表现出显著提高的光催化效率。结果表明，光生空穴和超氧自由基起主导作用，是可见光照射下亚甲基蓝(MB)溶液降解过程中的主要活性物种。样品中形成的异质结直接有助于提高SBO/SnO复合材料的光催化效率，因为它不仅拓宽了光响应范围，而且加速了光生载流子的分离。
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