A novel bifunctional organic supported nano-titania photocatalyst via the sol–gel method using walnut-shell

IF 4.6 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Science and Engineering: B Pub Date : 2025-09-04 DOI:10.1016/j.mseb.2025.118753

İlker Erdem

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Abstract

Nano-structured photocatalytic titania was prepared via the sol–gel method on the surface of carbon-rich organic support in situ to be used as a supported photocatalyst. The preparation process was lean, including sol preparation, mixing and calcination (450 °C). The microstructure and crystallinity were characterized by using SEM and XRD analysis. The prepared photocatalytic material shows better water clarification (dye removal) efficiencies than commercial nano titania, either excited by UV or visible light, or kept in the darkness. A bifunctional composite having both photocatalysis and adsorption capabilities simultaneously was prepared using walnut shell (WNS) as organic support for the first time. It has considerably higher dye removal rates (k_app values (min⁻¹)) when compared with commercial nano titania: 0.1827 (2.83 times higher), 0.1188 (9.35 times higher) and 0.1066 (12.25 times higher) under UV light, under visible light, and in the darkness, respectively, making it a promising candidate for water clarification processes.

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溶胶-凝胶法制备新型双功能有机负载型纳米二氧化钛光催化剂

采用溶胶-凝胶法制备了富碳有机载体表面的纳米结构光催化剂二氧化钛作为负载型光催化剂。制备过程简单，包括溶胶制备、混合和煅烧（450℃）。采用扫描电镜（SEM）和x射线衍射（XRD）对其微观结构和结晶度进行了表征。所制备的光催化材料无论在紫外光或可见光下激发，还是在黑暗中保持，都比商用纳米二氧化钛具有更好的水澄清（染料去除）效率。首次以核桃壳为有机载体制备了具有光催化和吸附双重功能的复合材料。与商业纳米二氧化钛相比，它具有相当高的染料去除率（kapp值（min−1））：在紫外光、可见光和黑暗下分别为0.1827（2.83倍）、0.1188（9.35倍）和0.1066（12.25倍），使其成为水澄清工艺的有希望的候选物。

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来源期刊

Materials Science and Engineering: B 工程技术-材料科学：综合

CiteScore

5.60

自引率

2.80%

发文量

481

审稿时长

3.5 months

期刊介绍： The journal provides an international medium for the publication of theoretical and experimental studies and reviews related to the electronic, electrochemical, ionic, magnetic, optical, and biosensing properties of solid state materials in bulk, thin film and particulate forms. Papers dealing with synthesis, processing, characterization, structure, physical properties and computational aspects of nano-crystalline, crystalline, amorphous and glassy forms of ceramics, semiconductors, layered insertion compounds, low-dimensional compounds and systems, fast-ion conductors, polymers and dielectrics are viewed as suitable for publication. Articles focused on nano-structured aspects of these advanced solid-state materials will also be considered suitable.