Xie Yadian, Gao Lanxing, Xue Miaoxuan, Hou Yanqing, Yang Bo, Zhou Lingyun, Tong Xin
Guizhou Provincial Key Laboratory in Higher Education Institutions of Low-Dimensional Materials and Environmental and Ecological Governance, Key Laboratory of Low-Dimensional Materials and Big Data, College of Chemical Engineering, Guizhou Minzu University, Guiyang 550025, China.
Faculty of Metallurgy and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China.
Molecules. 2023 Jul 25;28(15):5622. doi: 10.3390/molecules28155622.
The control of alumina morphology is crucial yet challenging for its various applications. Unfortunately, traditional methods for preparing alumina particles suffer from several limitations such as irregular morphology, poor dispersibility, and restricted application areas. In this study, we develop a novel method for preparing spherical mesoporous alumina using chitin and Pluronic P123 as mixed templates. The effects of reaction temperature, time, and the addition of mixed templates on the phase structure, micromorphology, and optical absorption properties of the samples were investigated. The experimental results indicate that lower temperature and shorter reaction time facilitated the formation of spherical mesoporous alumina with excellent CO adsorption capacity. The periodic density functional theory (DFT) calculations demonstrate that both the (110) and (100) surfaces of γ-AlO can strongly adsorb CO. The difference in the amount of CO adsorbed by AlO is mainly due to the different surface areas, which give different numbers of exposed active sites. This approach introduces a novel strategy for utilizing biological compounds to synthesize spherical alumina and greatly enhances mesoporous alumina's application efficiency in adsorption fields. Moreover, this study explored the electrochemical performance of the synthesized product using cyclic voltammetry, and improved loading of electrocatalysts and enhanced electrocatalytic activity were discovered.
氧化铝形态的控制对于其各种应用至关重要，但也具有挑战性。不幸的是，传统的制备氧化铝颗粒的方法存在一些局限性，如形态不规则、分散性差以及应用领域受限。在本研究中，我们开发了一种以几丁质和普朗尼克P123作为混合模板制备球形介孔氧化铝的新方法。研究了反应温度、时间以及混合模板的添加对样品的相结构、微观形态和光吸收性能的影响。实验结果表明，较低的温度和较短的反应时间有利于形成具有优异CO吸附能力的球形介孔氧化铝。周期性密度泛函理论（DFT）计算表明，γ -AlO的（110）和（100）表面都能强烈吸附CO。AlO吸附CO量的差异主要归因于不同的表面积，这导致暴露的活性位点数量不同。这种方法引入了一种利用生物化合物合成球形氧化铝的新策略，并大大提高了介孔氧化铝在吸附领域的应用效率。此外，本研究使用循环伏安法探索了合成产物的电化学性能，并发现了电催化剂负载量的提高和电催化活性的增强。
