Synergistic Photocatalysis of Bayerite/Zeolite Loaded TiO2 Nanocomposites for Highly Efficient Degradation of Organic Pollutants in Aqueous Environments

IF 3.3 3区材料科学 Q3 CHEMISTRY, PHYSICAL Silicon Pub Date : 2024-06-10 DOI:10.1007/s12633-024-03056-y

Abdellah Ait baha, Aziz Ait-Karra, Rachid Idouhli, Kamal Tabit, Othmane Zakir, Burak Dikici, Mohy Eddine Khadiri, Abdesselam Abouelfida

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Abstract

Methylene blue dye (MB), prevalent in textiles like cotton, wood, and silk, raises environmental and health concerns. This study presents a successful synthesis of a Bayerite/zeolite nanocomposite powder using fumed silica by-product and aluminum nitrate. Hydrothermal exploration of factors, including duration, temperature, and Al/Si ratios, revealed that high temperature (160°C) and short duration (6h) favored optimal crystallization of bayerite/zeolite phases. Subsequently, an integrated photocatalytic adsorbent (IPA) was developed by mechanically mixing the synthesized bayerite/zeolite with TiO₂, followed by calcination (500 °C, 2 h), demonstrating superior efficiency in MB photodegradation under UV–Vis light. The IPA achieved 100% degradation efficiency for 60 mg/L of MB and maintained good photostability over three cycles. The bayerite/zeolite-supported TiO₂ nanocomposite exhibited the generation of positive holes (h +) and active hydroxyl radicals (OH•), showcasing its potential as a promising material for wastewater treatment applications.

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贝叶石/沸石负载 TiO2 纳米复合材料的协同光催化作用可高效降解水环境中的有机污染物

亚甲基蓝染料（MB）普遍存在于棉花、木材和丝绸等纺织品中，引发了环境和健康问题。本研究利用气相二氧化硅副产品和硝酸铝成功合成了贝叶石/沸石纳米复合粉末。对持续时间、温度和铝/硅比等因素的水热法研究表明，高温（160°C）和短时间（6 小时）有利于贝叶石/沸石相的最佳结晶。随后，通过机械方法将合成的贝叶石/沸石与 TiO2 混合，然后进行煅烧（500 °C，2 小时），开发出了一种集成光催化吸附剂（IPA），该吸附剂在紫外可见光下对甲基溴的光降解效率极佳。对于 60 mg/L 的甲基溴，IPA 的降解效率达到了 100%，并在三个周期内保持了良好的光稳定性。贝叶石/沸石支撑的 TiO2 纳米复合材料产生了正空穴（h +）和活性羟基自由基（OH-），展示了其作为废水处理应用材料的潜力。

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来源期刊

Silicon CHEMISTRY, PHYSICAL-MATERIALS SCIENCE, MULTIDISCIPLINARY

CiteScore

5.90

自引率

20.60%

发文量

685

审稿时长

>12 weeks

期刊介绍： The journal Silicon is intended to serve all those involved in studying the role of silicon as an enabling element in materials science. There are no restrictions on disciplinary boundaries provided the focus is on silicon-based materials or adds significantly to the understanding of such materials. Accordingly, such contributions are welcome in the areas of inorganic and organic chemistry, physics, biology, engineering, nanoscience, environmental science, electronics and optoelectronics, and modeling and theory. Relevant silicon-based materials include, but are not limited to, semiconductors, polymers, composites, ceramics, glasses, coatings, resins, composites, small molecules, and thin films.