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一种合成新型AgPO/SnO/猪骨的绿色方法及其作为催化剂在木质素磺酸盐光降解为脂肪酸中的应用。

A green approach for the synthesis of novel AgPO/SnO/porcine bone and its exploitation as a catalyst in the photodegradation of lignosulfonate into alkyl acids.

作者信息

Chen Kai, Cao Mengdie, Ding Cong, Zheng Xinsheng

机构信息

College of Science, Huazhong Agricultural University Wuhan 430070 China

出版信息

RSC Adv. 2018 Jul 27;8(47):26782-26792. doi: 10.1039/c8ra04962a. eCollection 2018 Jul 24.

DOI:10.1039/c8ra04962a
PMID:35541074
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9083099/
Abstract

A novel AgPO/SnO/porcine bone composite photocatalyst was successfully prepared an ion exchange method, which can convert lignin derivatives into small molecular acids upon exposure to visible light at room temperature at ambient pressure. The composition characterization, optical absorption properties and photocatalytic activities of the AgPO/SnO/porcine bone composites were thoroughly investigated. The certain role of each component of the composites in the degradation reaction was discussed: AgPO acted as the major active component, while SnO and porcine bone as cocatalyst contributed to improve the photocatalytic activity and stability of AgPO. The enhanced activity of the AgPO/SnO/porcine bone composite may be attributed to the synergistic effect including the matched energy band structures of AgPO and SnO for the decrease in the probability of electron-hole recombination and improved performance in the presence of hierarchical porous porcine bone (hydroxyapatite). This paper also analyzed the change of the molecular weight and structure of sodium lignin sulfonate in the photocatalytic reaction and discussed the possible photocatalytic mechanism of the photocatalyst composite, indicating that the benzene rings of guaiacol were oxidized into different alkyl acids (maleic acid, oxalic acid, formic acid and methoxy acetic acid).

摘要

通过离子交换法成功制备了一种新型的AgPO/SnO/猪骨复合光催化剂，该催化剂在室温和常压下暴露于可见光时可将木质素衍生物转化为小分子酸。对AgPO/SnO/猪骨复合材料的组成表征、光吸收性能和光催化活性进行了深入研究。讨论了复合材料各组分在降解反应中的特定作用：AgPO作为主要活性成分，而SnO和猪骨作为助催化剂有助于提高AgPO的光催化活性和稳定性。AgPO/SnO/猪骨复合材料活性增强可能归因于协同效应，包括AgPO和SnO匹配的能带结构降低了电子-空穴复合概率，以及在具有分级多孔结构的猪骨（羟基磷灰石）存在下性能得到改善。本文还分析了光催化反应中木质素磺酸钠分子量和结构的变化，并讨论了光催化剂复合材料可能的光催化机理，表明愈创木酚的苯环被氧化成不同的烷基酸（马来酸、草酸、甲酸和甲氧基乙酸）。

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