新型复合光催化材料对水体中抗生素的降解研究
毕业论文关键词：BiOI/CNTs；碳纳米管；沉淀法；新型复合光催化材料；抗生素
Reach on Novel Photocatalyst Composite Material on Degradation of Antibioticsin Waters
Abstract:The BiOI and BiOI/CNTs novel photocatalyst composite material were prepared by means of precipitation method. The morphology, structure of the photocatalysts were charactered using a number of analytical instumentations including X-ray powder diffraction (XRD) and scanning electron microscopy (SEM). Tetracycline hydrochloride as the degradation object, the tungsten lamp as the light source, the effects of BiOI/CNTs and BiOI on the degradation of tetracycline hydrochloride were studied by four conditions of tetracycline concentration, light intensity, reaction time and catalystdosage. The results show that: The degradation effect of BiOI/CNTs can reach 71.57% under the four conditions, for example: tungsten lamp open on 600W, reaction time is an hour and a half, photocatalyst is 0.04g, the concentration of tetracycline is 0.004mg/mL, but the BiOI only reach 56.91%. The overall degradation rate of BiOI/CNTs is higher than BiOI.
Key words: BiOI/CNTs; Carbon nano-tubes; Method of precipitation; Novel photocatalyst composite material; Antibiotics
目 录
摘要 1
引言 2
1 材料与方法 3
1.1 主要实验材料及仪器 3
1.2 光催化材料的制备 3
1.2.1 沉淀法制备BiOI 3
1.2.2 BiOI/CNTs复合光催化材料的制备 3
1.3 光催化材料结构和性能表征分析 4
1.3.1 XRD分析 4
1.3.2 SEM分析 4
1.4 光催化实验 4
1.4.1 绘制四环素标准曲线 4
1.4.2 降解反应及降解率的计算 5
2 结果分析 6
2.1 新型复合光催化材料的结构表征 6
2.1.1 X射线衍射(XRD)分析 6
2.1.2 电镜分析 7
2.2 比较光催化材料在四因素下对盐酸四环素降解率的影响 8
2.2.1 时间对盐酸四环素降解率的影响 8
2.2.2 催化材料的用量对盐酸四环素降解率的影响 9
2.2.3 盐酸四环素浓度对降解率的影响 10
2.2.4 光照强度对盐酸四环素降解率的影响 11
3 结论 12
参考文献 13
致谢 15
新型复合光催化材料对水体中抗生素的降解研究
引言
伴随着抗生素的普遍使用，抗生素在水体中的污染也愈来愈严重。一些生产抗生素的药厂废水处理技术不达标，含有较多抗生素的污水直接排入附近的河流中，这对地表水、地下水、水生生物、土壤以及人类的健康等造成严重影响。抗生素在环境中的降解主要有生物降解、水解和光解等[1]。其中生物降解主要是微生物降解；水解主要是一些抗生素在酸性或者中性条件下发生水解反应[2]；光解是近年来研究热门的话题，光催化剂的加入不仅克服了水解和生物降解时间长、作用慢的缺点，而且光催化剂是固体、利于回收，减少了对环境的二次污染。
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