静电自组装水滑石基 g-C3N4 复合材料用于吸附和光催化降解诺氟沙星水溶液

IF 7.4 2区 工程技术 Q1 ENGINEERING, CHEMICAL
Xiaodong Yang , Minghui Li , Zhiyong Hou , Xuefei Yang , Yuanxia Guo , Shuaiqi Luo , Jin Zhao , Kai Wang , Pengkai Sun , Qiang Yang , Rui Chen , Shuo Yang , Xin Lu , Lulu Liu , Lili Wang , Ye Han , Fanming Zeng , Bin Gao
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引用次数: 0

摘要

诺氟沙星是一种喹诺酮类抗生素污染物,对环境和人类健康构成严重威胁。本研究利用静电自组装和水滑石的结构记忆效应制备了水滑石基 g-C3N4 复合材料,以优化其在可见光照射下对诺氟沙星的吸附降解。优化后的水滑石和 g-C3N4 复合材料(750°C,g-C3N4 占 40 wt%)在可见光下 1.5 h 内的最高光降解速率常数为 1.8×10-2 min-1,诺氟沙星的降解率达到 83.98%,超过了裸 g-C3N4 和水滑石光催化剂。该复合材料具有均匀的花朵状微形态和丰富的介孔结构等协同效应,因此比表面积大(58.67 m2/g),活性位点丰富,光生电荷分离效率高。所有这些都促进了诺氟沙星的吸附(7.95 mg/g)和随后的可见光降解。此外,在可见光照射下降解诺氟沙星的过程中观察到的优异光催化性能归功于光生电子和空穴在水滑石和 g-C3N4 成分之间的有效传输。这项研究突出了水滑石和 g-C3N4 复合材料作为一种出色的光催化剂在环境修复和水处理方面的潜力。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Electrostatic self-assembly of hydrotalcite-based g-C3N4 composites for adsorption and photocatalytic degradation of aqueous norfloxacin
Norfloxacin, a quinolone antibiotic pollutant, posed a significant threat to environment and human being health. In this study, hydrotalcite-based g-C3N4 composites were produced using electrostatic self-assembly and the structural memory effect of hydrotalcite to optimize their adsorption-degradation of norfloxacin under visible-light illumination. Optimized hydrotalcite and g-C3N4 composite (750°C, 40 wt% of g-C3N4) exhibited a highest photo-degradation rate constant of 1.8×10−2 min−1 with 83.98 % norfloxacin degradation achieved within 1.5 h under visible-light, surpassing that of bare g-C3N4 and hydrotalcite photocatalysts. The synergistic effects of the composite, such as uniform flower-like micro-morphology and rich mesoporous structure, resulted in a large specific surface area (58.67 m2/g), abundant active sites, and good photo-generated charge separation efficiency. All these facilitated both sorption (7.95 mg/g) and subsequent visible-light degradation of norfloxacin. Furthermore, the superior photocatalytic performance observed in the degradation of norfloxacin under visible-light illumination was assigned to the effective transport of photogenerated electrons and holes between hydrotalcite and g-C3N4 components. The work highlights the potentials of hydrotalcite and g-C3N4 composites as an excellent photocatalyst for environment remediation and water treatment.
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来源期刊
Journal of Environmental Chemical Engineering
Journal of Environmental Chemical Engineering Environmental Science-Pollution
CiteScore
11.40
自引率
6.50%
发文量
2017
审稿时长
27 days
期刊介绍: The Journal of Environmental Chemical Engineering (JECE) serves as a platform for the dissemination of original and innovative research focusing on the advancement of environmentally-friendly, sustainable technologies. JECE emphasizes the transition towards a carbon-neutral circular economy and a self-sufficient bio-based economy. Topics covered include soil, water, wastewater, and air decontamination; pollution monitoring, prevention, and control; advanced analytics, sensors, impact and risk assessment methodologies in environmental chemical engineering; resource recovery (water, nutrients, materials, energy); industrial ecology; valorization of waste streams; waste management (including e-waste); climate-water-energy-food nexus; novel materials for environmental, chemical, and energy applications; sustainability and environmental safety; water digitalization, water data science, and machine learning; process integration and intensification; recent developments in green chemistry for synthesis, catalysis, and energy; and original research on contaminants of emerging concern, persistent chemicals, and priority substances, including microplastics, nanoplastics, nanomaterials, micropollutants, antimicrobial resistance genes, and emerging pathogens (viruses, bacteria, parasites) of environmental significance.
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