Zhang Duoping, Ma Chenghai, Shi Peidong, Yang Zuan, Rong Tongwei, Xiong Liurui, Liao Wenhui
School of Chemical Engineering, Qinghai University, Xining 810016, China.
Department of New Energy (Photovoltaic) Industry Research Center, Qinghai University, Xining 810016, China.
Polymers (Basel). 2023 Feb 11;15(4):903. doi: 10.3390/polym15040903.
In this study, a series of highly crystalline π-conjugated polyimide photocatalysts with porous nano hollow shell (HSPI) was prepared for the first time by the hard template method by adjusting the addition ratio of the template precursor. SiO nanospheres not only serve as template agents but also as dispersants to make precursors of SPI more uniform, and the degree of polymerization will be better, resulting in significantly enhanced crystallinity of HSPI relative to bulk SPI (BSPI). More strikingly, it is found that HSPI has a larger specific surface area, stronger visible light absorption, and higher separation efficiency of photogenerated electron and hole pairs compared with BSPI by various spectral means characterization analysis. These favorable factors significantly enhanced the photocatalytic degradation of methyl orange (MO) by HSPI. This work provides a promising approach for the preparation of cheap, efficient, environmentally friendly, and sustainable photocatalysts.
在本研究中，首次通过硬模板法，通过调整模板前驱体的添加比例，制备了一系列具有多孔纳米空心壳的高结晶度π共轭聚酰亚胺光催化剂（HSPI）。SiO纳米球不仅作为模板剂，还作为分散剂，使SPI的前驱体更均匀，聚合程度更好，导致HSPI相对于本体SPI（BSPI）的结晶度显著提高。更引人注目的是，通过各种光谱手段表征分析发现，与BSPI相比，HSPI具有更大的比表面积、更强的可见光吸收以及更高的光生电子和空穴对分离效率。这些有利因素显著增强了HSPI对甲基橙（MO）的光催化降解。这项工作为制备廉价、高效、环境友好和可持续的光催化剂提供了一种有前景的方法。
