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为了进一步优化Bi2WO6的光催化性能和重复利用率，通过水热自组装法制备了具有3D结构的Bi2WO6/石墨烯气凝胶(BGA);采用XRD、SEM、FT-IR、UV-Vis DRS和BET等方法对制备的样品进行了表征和分析。以罗丹明B(RhB)作为目标降解物，以500 W氙灯为光源，对所制备材料的光催化性能进行了评价。当Bi2WO6与GA的质量比为6∶1时，催化剂在光照120 min内对罗丹明B的去除率可达99.7%,对盐酸四环素降解率可达98.6%,经过5次循环使用后，Bi2WO6/石墨烯气凝胶复合材料仍保持较好的光催化活性。自由基捕获实验证实h+为光催化降解的主要活性物质。此外，该材料还具有一定的可形变抗压性，提高了光催化剂回收再利用能力。
Abstract：In order to improve the photocatalytic activity and recyclability of Bi2WO6, the Bi2WO6/graphene aerogel(BGA) with 3D structure were prepared by hydrothermal self-assembly method. The prepared samples were characterized by XRD, SEM, FT-IR, UV-Vis DRS, BET, etc. The photocatalytic performance of the prepared samples was evaluated using rhodamine B(RhB) as the target pollutant and 500 W xenon lamp as the light source. When the mass ratio of Bi2WO6 to GA was 6∶1, the degradation rate of rhodamine B by photocatalytic degradation could reach 99.7% within 120 min. After 5 cycles of use, the Bi2WO6/graphene aerogel composite still maintains good stability. The degradation rate of tetracycline hydrochloride was 98.6%. Free radical trapping experiments confirm that h+is the main active species during the photocatalytic process. In addition, the BGA has certain deformable and compressive ability, which improves the recycling and reusability of the material.
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基本信息:
DOI：10.13353/j.issn.1004.9533.20220810
中图分类号:TQ427.26;O643.36;O644.1
引用信息:
[1]雷超,常薇,周莹莹,等.3D可回收型Bi_2WO_6/石墨烯气凝胶的制备及其光催化性能研究[J].化学工业与工程,2024,41(01):21-27.DOI:10.13353/j.issn.1004.9533.20220810.
基金信息:
国家自然科学基金项目(22008185); 陕西省重点研发计划项目(2021KW-12); 西安市碑林区科技计划项目(GX2213); 西安市科技计划项目(23GXFW0019)