稻壳基介孔TiO2-SBA-15纳米复合材料光催化降解亚甲基蓝及抗菌活性研究

IF 2.8 4区 工程技术 Q2 CHEMISTRY, APPLIED Adsorption Science & Technology Pub Date : 2021-09-19 DOI:10.1155/2021/9290644
E. Alosaimi, I. Alsohaimi, T. Dahan, Qiao Chen, Ayman A. O. Younes, B. El-Gammal, S. Melhi
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引用次数: 9

摘要

环境水资源中污染物的存在及其对生态系统和人类社会的危害日益引起人们的关注。TiO2光催化剂被认为是一种去除污染物的有效光催化剂。本文以稻壳提取物为硅源,制备了介孔TiO2-SBA-15。采用红外光谱(FTIR)、小角和广角XRD、拉曼光谱、紫外可见光谱(UV-vis)、BET表面积分析和HRTEM等手段对制备的纳米复合材料进行了表征。研究了复合材料在紫外光照射下降解亚甲基蓝的光催化效率。有趣的是,由于TiO2在SBA-15壁上的良好分散性和良好的亲水性,纳米复合材料表现出良好的催化活性。含有10 wt% TiO2的复合材料具有较高的光降解性能,在15-20分钟的照射下,MB被完全降解。此外,TiO2-SBA-15能有效抑制革兰氏阳性菌和革兰氏阴性菌的生长。这些结果为环境管理行业提供了一种实用而经济的方法。
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Photocatalytic Degradation of Methylene Blue and Antibacterial Activity of Mesoporous TiO2-SBA-15 Nanocomposite Based on Rice Husk
Concerns have been increased regarding the existence of pollutants in environmental water resources and their risks to the ecosystem and human society. TiO2 photocatalyst is considered as an effective photocatalyst to remove the pollutants. Herein, the mesoporous TiO2-SBA-15 was prepared using the rice husk extract as the silica source. The fabricated nanocomposites were characterized using FTIR, small and wide angle XRD, Raman spectroscopy, UV-vis, BET surface area analysis, and HRTEM. The photocatalytic efficiency of the composites for the degradation of methylene blue (MB) has been evaluated under UV irradiation. Interestingly, due to the excellent dispersion of TiO2 on the wall of SBA-15 and good hydrophilicity, the nanocomposites displayed a good catalytic activity. The higher photodegradation performance was achieved by the composite containing 10 wt% TiO2 by which the MB was fully degraded within 15-20 min of irradiation. Besides, TiO2-SBA-15 could effectively inhibit the growth of Gram-positive and Gram-negative bacteria. These results offer a practical and economic approach in the environmental management industries.
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来源期刊
Adsorption Science & Technology
Adsorption Science & Technology 工程技术-工程:化工
CiteScore
5.00
自引率
10.30%
发文量
181
审稿时长
4.5 months
期刊介绍: Adsorption Science & Technology is a peer-reviewed, open access journal devoted to studies of adsorption and desorption phenomena, which publishes original research papers and critical review articles, with occasional special issues relating to particular topics and symposia.
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