Chen Haoqiu, Wang Tingting, Sun Yanfen, Chen Zhiwei, Yuan Juan, Luo Lianxin
Key Laboratory of Clean Pulp and Papermaking and Pollution Control of Guangxi,College of Light Industrial and Food Engineering, Guangxi University, Nanning 530004, China.
Langmuir. 2024 Oct 1;40(39):20640-20647. doi: 10.1021/acs.langmuir.4c02576. Epub 2024 Sep 18.
Effective treatment of dye wastewater is currently a great concern and a research hotspot. Electrocatalysis has unique advantages in treating toxic and harmful refractory dye wastewater; however, it requires an external power supply, which increases energy consumption and cost. As a new energy collection technology, triboelectric nanogenerators (TENGs) have gained considerable attention. In this study, an origami multilayer spherical friction nanogenerator (Q-TENG) was developed for the removal of methylene blue (MB) from dye wastewater. The current and voltage output performances of Q-TENG were explored, and the removal and degradation mechanisms of MB were discussed. Results indicated that when the water wave acceleration = 3 m/s, the open-circuit voltage and short-circuit current reached the maximum values of 179 V and 9.4 μA, respectively. The self-powered catalytic degradation of MB using Q-TENG can produce more OH and SO, and the free radicals increase with increasing action time of Q-TENG, thus increasing the degradation efficiency of MB. This study provides a new strategy for solving the problem of high energy consumption during electrochemical reactions in wastewater treatment.
有效处理染料废水是当前备受关注的一个研究热点。电催化在处理有毒有害的难降解染料废水方面具有独特优势；然而，它需要外部电源，这增加了能源消耗和成本。作为一种新型能量收集技术，摩擦纳米发电机（TENGs）已经受到了广泛关注。在本研究中，开发了一种折纸多层球形摩擦纳米发电机（Q-TENG）用于去除染料废水中的亚甲基蓝（MB）。研究了Q-TENG的电流和电压输出性能，并探讨了MB的去除和降解机制。结果表明，当水波加速度 = 3 m/s时，开路电压和短路电流分别达到最大值179 V和9.4 μA。利用Q-TENG对MB进行自供电催化降解可产生更多的·OH和SO，且自由基随Q-TENG作用时间的增加而增多，从而提高了MB的降解效率。本研究为解决废水处理中电化学反应能耗高的问题提供了一种新策略。
