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设计能够有效利用多种能源的新型压电催化剂，有助于解决当前环境修复和能源需求增加的挑战。以Mo O3、KSCN及NaF为起始原料，采用一步无模板水热法成功制备一种具有高表面活性和优异压电特性的Mo S2中空微球，分别探讨了水热温度、水热时间及NaF添加量对制备MoS2中空微球的影响。结果表明：当水热温度为220℃、水热时间为16 h、NaF添加量为12 mmol时，制备的样品是粒径为0.5～1.0μm的1T相Mo S2中空微球。N2吸附?脱附实验表明，Mo S2微球的比表面积为57.67 m2/g，孔径主要分布在2～6 nm之间，平均孔径为4.25 nm。揭示了Mo S2中空微球形成机理，并探讨了其压电催化降解动力学规律。通过压电催化降解模拟污染物评价了Mo S2中空微球的催化性能。在超声振动下，60 s对亚甲基蓝和罗丹明B的降解率分别为89.3%和98.9%。应用于水体抗生素的降解，120 s对环丙沙星的降解率为94.7%。
Abstract：MoS2 hollow microspheres with a high surface activity and superior piezoelectric properties were prepared by a one-step template-free hydrothermal method with MoO3,KSCN and NaF as raw materials.The effects of hydrothermal reaction temperature,reaction time and NaF addition on the preparation of MoS2 hollow microspheres were investigated.The results show that the samples prepared are 1T phase MoS2 hollow microspheres with the sizes of 0.5?1.0μm at the hydrothermal temperature of 220℃,the hydrothermal time of 16 h,and the amount of Na F added of 12 mmol.According to the results of N2 adsorption-desorption experiments,the specific surface area of MoS2 microspheres is 57.67 m2/g,the pore sizes are mainly distributed between 2?6 nm,and the average pore size is 4.25 nm.The catalytic performance of Mo S2 microspheres was evaluated via piezoelectric catalytic degradation of methylene blue solution.Under the action of ultrasound,the degradation rate of MB is 89.3%,and Rhodamine B is98.9%at 60 s.In the degradation of antibiotics in water,the degradation rate of ciprofloxacin within 120 s is 94.7%.
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基本信息:
DOI：10.14062/j.issn.0454-5648.20220684
中图分类号:O643.36;X703
引用信息:
[1]哈燕萍,姚秉华,陈应龙,等.MoS_2中空微球的无模板水热法制备及压电催化性能[J].硅酸盐学报,2023,51(04):991-999.DOI:10.14062/j.issn.0454-5648.20220684.
基金信息:
国家自然科学基金(22072114); 陕西省重点研发计划(2020KW-070)
2023-03-07
2023-03-07
2023-03-07