钨酸铋复合催化剂制备及光催化降解罗丹明B的研究
Preparation of Bi2WO6 Composite Photocatalyst and Study on Its Photocatalytic Degradation of Rhodanine B
摘要
通过形貌调控及非金属掺杂等调控带隙结构,采用水热合成法制备由二维纳米片功能自组装的三维花球状Bi2WO6以及Ix-Bi2WO6掺杂型光催化材料,考察其形貌、化学组成、光学性质等.同时,以罗丹明B(RhB)为降解对象,研究Ix-Bi2WO6复合催化剂的光催化性能及催化机制.结果表明:在可见光照射下I3.00-Bi2WO6对RhB表现出优异的催化降解性能:当RhB初始浓度为10 mg/L、催化剂投加浓度为2.0 g/L、RhB初始pH为7时,脱色率达到近97%.催化剂在多次回收使用后,对RhB仍有较高的脱色率,化学稳定性较好.复合催化剂光催化降解RhB过程中,空穴和电子发挥主导作用,其次是羟基自由基和超氧自由基.
The morphology control and non-metallic doping were used to control the band gap structure,the three-dimensional flower-like Bi2WO6 and KI-Bi2WO6 doped photocatalytic materials were developed by using the surfactant PVP K30 and KI.The morphology,chemical composition,optical properties and photocatalytic performance was investigated.On this basis,the photocatalytic performance and catalytic mechanism of the composite catalyst were studied by taking Rhodanine B(RhB)as the degradation object.The results showed that KI-Bi2WO6 magnetic composite catalyst exhibited excellent catalytic degradation performance for RhB under visible light irradiation.When the initial concentration of RhB is 10 mg/L,the dosage concentration of catalyst is 2.0 g/L,and the initial pH value of RhB is 7,the decolorization rate reached 97%.After multiple recovery and use,the composite catalyst still had a high degradation effect on RhB,and the catalyst had excellent chemical stability.The free radical trapping experiments demonstrate that in the photocatalytic degradation of RhB by the composite catalyst,holes and electrons play a dominant role,followed by hydroxyl radicals and superoxide radicals.
年，卷(期)：
2026, 52(9)
分类号：
TQ031.7
X703.1
机标分类号：
O643.36
TQ426.6
TN383
在线出版日期：
2026年10月12日
基金项目：
:南昌职业大学博士科研启动基金，
