光催化
煅烧
无定形固体
材料科学
化学工程
热稳定性
多孔性
降级(电信)
纳米技术
催化作用
有机化学
化学
复合材料
电信
工程类
酶
计算机科学
作者
Shuoping Ding,Tianao Dong,Tim Peppel,Norbert Steinfeldt,Juncheng Hu,Jennifer Strunk
标识
DOI:10.1016/j.jcis.2021.09.029
摘要
This work describes the synthesis of porous hierarchical microspheres composed of amorphous SiO2 and crystalline β-Bi2O3 (BSO) via a simple solvothermal process and subsequent calcination. Complementary physicochemical methods were applied to study the function of amorphous SiO2, as well as the phase composition and morphology evolution of as-synthesized samples as a function of calcination temperature. The presence of amorphous SiO2 contributed to form hierarchically structured β-Bi2O3 with enhanced thermostability. Moreover, the degradation of tetracycline hydrochloride (TC) under visible light irradiation was employed as a model reaction to evaluate the photocatalytic activity of as prepared materials. In consequence, both phase composition and morphology were found to be significant parameters for adjusting the photocatalytic performance of the synthesized samples. The fastest TC degradation at a low dosage of catalyst (0.2 g L-1) was observed for the sample annealed at 400℃ which contains a highly crystalline β-Bi2O3 phase. The synergistic effect of the porous structure, excellent light absorption, and higher charge carrier separation and transfer efficiency is believed to be the reason for the optimal photocatalytic activity. This study offers a new method toward the fabrication of hierarchical porous structured β-Bi2O3 with enhanced thermostability for various applications.
科研通智能强力驱动
Strongly Powered by AbleSci AI