Preparation of Nickel Oxide-Loaded Hierarchical Porous Alumina Ceramic for Photocatalytic Degradation of Methylene Blue

IF 2.3 4区化学 Q3 CHEMISTRY, PHYSICAL

Catalysis Letters Pub Date : 2025-04-16 DOI:10.1007/s10562-025-05012-w

Tao Liu, Guangming Zhou, Bingyan Yu, Lihu Fu, Simiao Yu, Zhenjie Xu, Gang Lu

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Abstract

To address the problem of dye wastewater pollution, hierarchical porous alumina ceramics (HPAC) were prepared as carriers in this study by using digital light processing (DLP) 3D printing combined with the freeze-drying method. The results showed that the hierarchical porous alumina ceramics with a porogenic agent content of 33 wt% exhibited the highest porosity of 34.20% ± 1.22% and a pore size of 2–5 nm. An efficient photocatalytic system was constructed by loading nickel oxide nanoparticles (n-NiO) via the sol-gel method. The prepared photocatalytic carriers and photocatalysts were characterized for structural and morphological analysis using X-ray diffraction (XRD), scanning electron microscopy (SEM), Brunauer-Emmett-Teller (BET) surface area analyzer, and energy-dispersive X-ray fluorescence spectroscopy (EDS). The results indicated that n-NiO/HPAC with 15.43% NiO loading achieved optimal performance in methylene blue (MB) degradation experiments, with the MB degradation rate reaching 94.51%. This study provides a theoretical basis and technical support for the practical application of porous-material-loaded n-NiO photocatalysts in dye wastewater treatment.

Graphical abstract

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制备用于光催化降解亚甲基蓝的氧化镍负载分层多孔氧化铝陶瓷

为了解决染料废水污染问题，本研究采用数字光处理（DLP） 3D打印结合冷冻干燥方法制备了层次化多孔氧化铝陶瓷（HPAC）作为载体。结果表明，当致孔剂含量为33 wt%时，孔隙率最高，为34.20%±1.22%，孔径为2 ~ 5 nm。采用溶胶-凝胶法负载氧化镍纳米颗粒（n-NiO），构建了高效的光催化体系。采用x射线衍射仪（XRD）、扫描电镜（SEM）、比表面积分析仪（BET）和能谱仪（EDS）对所制备的光催化载体和光催化剂进行了结构和形态表征。结果表明，NiO负载率为15.43%的n-NiO/HPAC对亚甲基蓝（MB）的降解效果最佳，降解率可达94.51%。本研究为负载多孔材料的n-NiO光催化剂在染料废水处理中的实际应用提供了理论依据和技术支持。图形抽象

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来源期刊

Catalysis Letters 化学-物理化学

CiteScore

5.70

自引率

3.60%

发文量

327

审稿时长

1 months

期刊介绍： Catalysis Letters aim is the rapid publication of outstanding and high-impact original research articles in catalysis. The scope of the journal covers a broad range of topics in all fields of both applied and theoretical catalysis, including heterogeneous, homogeneous and biocatalysis. The high-quality original research articles published in Catalysis Letters are subject to rigorous peer review. Accepted papers are published online first and subsequently in print issues. All contributions must include a graphical abstract. Manuscripts should be written in English and the responsibility lies with the authors to ensure that they are grammatically and linguistically correct. Authors for whom English is not the working language are encouraged to consider using a professional language-editing service before submitting their manuscripts.