Man, Shuaishuai, Zhou, Shanbin, Yin, Zehao, Zhang, Man, Sun, Qing, Yang, Haifeng, Xu, Ke, Bao, Hebin, Xu, Lei, Yang, Wenjing, Mo, Zhihong, and Li, Xueming
[Display omitted] • Ti 3 C 2 served as a pore-forming agent for preparing porous Sb-SnO 2 electrode. • Ti 3 C 2 -contained electrolyte could regulate the Sb-Sn alloy nucleation process to decrease its domain size. • High-conductive Ti 3 C 2 improves the metal ions diffusion process to increase the Sb-SnO 2 loading amount. • Ti 3 C 2 -modified Sb-SnO 2 electrode achieved good degradation performance for methylene blue, methylene orange, norfloxacin, and P-phenylenediamine. Sb-SnO 2 is an appealing electrode for degrading organic pollutants in wastewater treatment, albeit further modifications are needed for its inefficient electrochemical oxidation capacity. In this work, we prepared Ti 3 C 2 -modified Sb-SnO 2 electrode by electrodeposition technology. High-conductive MXene matrix regulated the Sb-Sn alloy nucleation process to decrease its domain size during deposition and generated pores during the annealing process. When introducing 20 mg MXene into the electrolyte, the obtained Sb-SnO 2 electrode (Ti 3 C 2 -20) presented a larger oxygen evolution over-potential (2.32 V vs SCE), increased amount of active sites, and enlarged electrochemical specific surface area (∼4.4-fold) than the unmodified electrode, resulting in a promoted OH generation ability (∼7.4 times). Methylene blue (MB), methyl orange (MO), norfloxacin (NOR), and P-phenylenediamine (PPD) were effectively degraded by the Ti 3 C 2 -20 anode with economic energy consumption. Moreover, the Ti 3 C 2 -20 electrode also featured a longer lifetime, almost fivefold, than the unmodified Sb-SnO 2 electrode due to its larger loading amount and decreased charge transfer resistance. Consequently, this work offers a new perspective for designing efficient and stable porous electrodes to address water pollution issues. [ABSTRACT FROM AUTHOR]