花状MoO3-x的制备及其光催化水解氨硼烷产氢性能增强的研究  

Synthesis of Flower-like MoO_(3-x) and Study on Enhanced Catalytic Activity for Hydrogen Generation from Ammonia Borane Under Visible Light

作　　者：龚洁 叶群颖[1] 罗腾 秦志龙 熊柏闻 邓淼 陈燚 

机构地区：[1]武汉科技大学资源与环境工程学院冶金矿产资源高效利用与造块湖北省重点实验室,武汉430081 [2]武汉理工大学资源与环境工程学院,武汉430070

出　　处：《工业安全与环保》2017年第12期74-77,85,共5页Industrial Safety and Environmental Protection

基　　金：国家自然科学基金(51472194,51602237);湖北省大学生创新训练计划项目;武汉科技大学青年科技骨干培育计划项目(2014xz016),武汉科技大学冶金矿产资源高效利用与造块湖北省重点实验室开放基金(2017zy009)

摘　　要：利用简易的溶剂热法制备了花状的MoO_(3-x),通过XRD,SEM,XPS,DRS测试表征分析其表面存在Mo(V),产生等离子体共振,使得可见-近红外区光吸收增强。在可见光下,花状的MoO_(3-x)表现出了良好的氨硼烷水解产氢增强的催化性能,产氢量达到395.3μmol,AB转化率为81.34%,是黑暗条件下产氢量的2.4倍。根据捕获实验可知,MoO_(3-x)由于等离子共振在可见光激发下生成的h^+、·OH与H_2O共同攻击MoO_(3-x)-AB复合物,断开B-N键,从而析出H_2。Flower-like MoO_（3-x）was synthesized by a facile solvothermal method. Detailed characterizations by means of XRD,SEM,XPS,and DRS measurements revealed that the as-synthesized MoO_（3-x）exhibited a strong localized surface plasmon resonance（ LSPR） induced by the existence of Mo^（5＋） in MoO_（3-x）surface and enhanced absorption from the visible to the near-infrared light region. Under visible light irradiation,flower-like MoO_（3-x） showed dramatically enhanced H_2 evolution from NH_3BH_3 solutions,H_2 production yield reached 395. 3 μmol and the conversion of AB was 81. 34%,2. 4 times of H_2 production yield in the dark condition. According to the trapping experiments,plasmonic MoO_（3-x）can be excited under visible light irradiation and electron-hole pairs are generated due to the strong LSPRs. Subsequently,photogenerated h＋and ·OH combined with H_2O attack the MoO_（3-x）– AB complex species to dissociate the B – N bond,so that H_2 is generated.

关 键 词：MoO3-x 氨硼烷水解 产氢 

分 类 号：O643.36[理学—物理化学] TQ116.2[理学—化学]