采用溶剂热法制备了具有Z型异质结构的BiOCl/BiOI新型空心微球复合材料,并将其应用于可见光催化降解盐酸四环素(TCH)。结果表明,复合材料在静电场及表面活性剂十六烷基三甲基氯化铵(CTAC)的共同作用下,通过纳米片的自组装最终形成空心球结构,并具有较强的可见光响应;光催化结果表明,30% BiOCl/BiOI对TCH的降解率最高,达87.4%,催化活性均优于单独的BiOCl和BiOI。自由基捕获实验表明,光催化降解TCH的活性物种主要是·O-2,并由此推测了光催化降解机理。
A novel hollow microsphere composite BiOCl/BiOI with Z-type heterostructure was prepared by solvothermal method,and applied to the visible light photocatalytic degradation of tetracycline hydrochloride (TCH).The study showed that under the combined effect of the electrostatic field and the surfactant cetyltrimethylammonium chloride (CTAC),the composite material finally formed a hollow microsphere structure with strong visible light response through the self-assembly of nanosheets.The photocatalytic results indicated that the degradation rate of TCH by 30% BiOCl/BiOI was 87.4%,and the catalytic activity was better than that of BiOCl and BiOI alone.Free radical capture experiments demonstrated that the active species of photocatalytic degradation of TCH were mainly ·O-2.From this,the photocatalytic degradation mechanism was speculated.
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基金资助
国家自然科学基金(21868036和32061133005);天山青年计划项目(2020Q011)
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