【摘要】 采用一步水热法在180℃下制备了花状MoS₂/Bi₂S₃复合异质结。在硫源充足的前提下,通过控制原料中钼源和铋源的比例（Mo∶Bi=0.5,Mo∶Bi=1,Mo∶Bi=1.5）,制备了不同负载比的MoS₂/Bi₂S₃复合物。相比于纯Bi₂S₃,复合物具有更好的光催化还原六价铬活性,并且Mo∶Bi=1的复合物性能最佳,这可能归结于MoS₂优良的吸附性能、MoS₂/Bi₂S₃复合物异质结的构建,极大地提高了光生电子空穴对的分离。本文对复合物的形貌、性能进行了详细的讨论,提出了可能的光催化还原反应的机理。更多还原

【Abstract】 MoS₂/Bi₂S₃ composite heterojunction was prepared by one-step hydrothermal method at 180 ℃.Using sufficient sulfur source, MoS₂/Bi₂S₃ composite with different loading ratio was obtained by controlling the proportion of Mo source and Bi source（Mo∶Bi=0.5, Mo∶Bi=1, Mo∶Bi=1.5）.Compared with pure Bi₂S₃, the composites have the better visible light adsorption and higher photocatalytic reduction of hexavalent chromium.Moreover, MoS₂/Bi₂S₃ composite（Mo∶Bi=1） exhibites the best photocatalytic performance, which may be related to the excellent visible light adsorption, the construction of MoS₂/Bi₂S₃ composite heterojunction and high separation rate of electron-hole pairs.Above phenomenea was discussed in detail,and further the possible reaction mechanism of photocatalytic reduction of hexavalent chromium was proposed.更多还原