摘要
以少层六方氮化硼纳米层状材料为载体,通过水溶性盐晶体模板法和离子交换法制备了h-BN稳定AgI/AgCl的三元复合体系。通过XRD、FT-IR、SEM、TEM等手段对样品的结构和形貌进行检测分析,利用UV-Vis DRS测试了样品的吸光性能。可见光光催化降解罗丹明B实验表明,光照24 min,AgI/AgCl/h-BN复合光催化材料对罗丹明B的降解率高达93%,远高于实验合成的大块AgCl、AgCl立方块、AgI/AgCl纳米腰果及文献报道的数值。并且三元材料循环利用4次后,对罗丹明B的降解率几乎保持不变。结合光电化学测试、活性物种捕获和电子自旋共振等实验结果,探讨了复合材料光催化活性和稳定性提高的机理。
The visible light active ternary composite AgI/AgC1/h-BN was synthesized via water-soluble KC] crystal temple and ion-exchange process using h-BN nanosheets as the catalyst support. The structure and morphology of as-prepared samples were characterized by XRD, FT-IR, SEM and TEM. The absorption properties of the samples were analyzed by UV-Vis DRS. The result of photocatalytic degradation rate of RhB can reach 93% after 24 rain illumination under visible light, indicating that the higher photocatalytic activity and stability of AgI/AgC1/h-BN than bulk AgC1, AgC1 cubes, AgI/AgC1 nanocashews and that reported in the literature. And the degradation rate of RhB kept almost unchanged after 4 cycles, which indicated AgI/AgC1/h-BN photocatalyst excellent stability. Furthermore, the proposed mechanisms for the enhanced photocatalytic and stability were investigated by photoelectron chemical measurements, radical trapping experiments and ESR analysis.
出处
《无机化学学报》
SCIE
CAS
CSCD
北大核心
2017年第7期1181-1186,共6页
Chinese Journal of Inorganic Chemistry
基金
国家自然科学基金(No.21676129)
江苏省研究生创新基金(No.SJLX16_0433)资助项目
