Abstract
Membrane technology has become the mainstream process for the production of electronic grade hydro-gen peroxide(H2O2).But due to the oxidation degradation of the organic membranes(e.g.polyamide)by the strong oxidative radicals(e.g.·OH)generated via the activation of H2O2 by iron ions(Fe3+),the short effective lifetime of membranes remains a challenge.Inorganic nano tin oxide(SnO2)has great potential for the removal of Fe3+in strongly oxidative H2O2 because of its ability to stabilize H2O2 and preferentially adsorb Fe3+.Herein,we have designed for the first time a flower-like robust SnO2 membrane on the cera-mic support by in situ template-free one-step hydrothermal method.The three-dimensional loose pore structure in the membrane built by interlacing SnO2 nanosheets endows the SnO2 membrane with a high specific surface area and abundant adsorption sites(—OH).Based on the coordination complexation and electrostatic attraction between the SnO2 surface and Fe3+,the membrane shows a high Fe3+removal effi-ciency(83％)and permeability(24 L·m-2·h-1·MPa-1)in H2O2.This study provides an innovative and sim-ple approach to designing robust SnO2 membranes for highly efficient removal of Fe3+in harsh environments,such as strong oxidation conditions.
基金项目
国家重点研发计划(2021YFB3801303)
国家自然科学基金(21838005)
国家自然科学基金(21921006)
State Key Laboratory of Materials-Oriented Chemical Engineering(SKL-MCE-22A03)
Key Research and Development Program of Jiangsu Provincial Department of Science and Technology(BE2022033-3)
NETL
NSTL
万方数据