In-situ constructing AlTiZn/CN heterojunction via memory effect for effective degradation of naphthalene under UV irradiation

文献类型： 外文期刊

第一作者： Liang, Jinhua

作者： Liang, Jinhua;Fang, Yan;Li, Weikang;Yang, Tianyi;Peng, Chaofei;Liu, Boqing;Chen, Ke;Sun, Qiyuan;Wang, Bin;Ren, Xiaoqian;Xu, Wenlong

作者机构：

关键词： Self-assembly; 20/AlTiZn/CN heterojunction; Memory effect; Photodegradation; Naphthalene

期刊名称：PROCESS SAFETY AND ENVIRONMENTAL PROTECTION （ 影响因子：7.8； 五年影响因子：7.7 ）

ISSN： 0957-5820

年卷期： 2025 年 193 卷

页码：

收录情况： SCI

摘要： Improving active sites through thoughtful design of material structure is an effective approach to boost activation efficiency and degradation performance. In this study, a series of x/AlTiZn/CN heterojunctions were successfully fabricated via the in-situ self-assembly of x/AlTiZnO and g-C3N4, utilizing the memory effect of layered double hydroxides (LDH). AlTiZnO was reverted to AlTiZn-LDH framework in deionized water, which provided OH-metal and active sites on the solid surface through memory effect during restoration. Systematic characterizations confirmed that 20/AlTiZn/CN heterojunction, restored from in-situ self-assembly of 20/AlTiZnO and gC(3)N(4), is a characteristic of mesoporous material with larger specific surface area. Then, photoelectric performance tests of naphthalene (NPT) degradation obviously manifested that a significant enhancement in photocatalytic performance of x/AlTiZn/CN heterojunction. This improvement primarily attributed to the compact contact interface and the synergistic effect between g-C3N4 and AlTiZn-LDH restored from AlTiZn-LDO, which accelerated the charge transfer process at the interface. Consequently, the degradation efficiencies of 20/AlTiZn/CN were 3.5, 1.27 and 2.60 times higher than those of 20/AlTiZn-LDH, 20/AlTiZn-LDH/CN and g-C3N4, respectively. Moreover, photocatalytic degradation of NPT over 20/AlTiZn-LDH/CN followed quasi-first-order kinetics. Finally, the scavenging experiment, ESR, and degradation pathways analysis indicate that the highly efficient NPT photodegradation over 20/AlTiZn/CN is the synergistic results of memory effect and various active substance, such as center dot O-2(-), center dot OH and h(+). This study exploits a cost-effective, environmentally friendly photocatalyst and provides valuable insights into the photocatalysis degradation of NPT.

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