文献类型：期刊文献

英文题名：Designing of 3d Mno2-Graphene Catalyst on Nanosponge for Abatement Temperature Removal of Formaldehyde

作者：Shi, Lei[1,2]; Zhou, Xudong[1]; Guo, Yujie[1]; Li, Yunyu[1]; Yan, Chenxu[2]; Han, Qifeng[1]; Zhang, Lingfan[1]; Zhang, Wenqing[1]

机构：[1] School of Chemistry and Molecular Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, China; [2] Key Laboratory for Advanced Materials, Feringa Nobel Prize Scientist Joint Research Centre, Institute of Applied Chemistry, East China University of Science and Technology [ECUST], No.130 Meilong Road, Shanghai, 200237, China

年份：2022

外文期刊名：SSRN

收录：EI(收录号：20220087929)

语种：英文

外文关键词：Catalytic oxidation - Formaldehyde - Graphene - Nanocatalysts - Oxides - Reaction intermediates - Reaction kinetics

摘要：The Mn-based catalysts, with low cost and high activity, are believed to be the effective composites for eliminate in-door formaldehyde (HCHO), while the powdered form nanosized catalysts are hardly to apply for practical application. Herein, hetero-structure of nanosheets manganese oxide (MnO2) encapsulating N-doping graphene sphere (GS) were deposited in network-like nanosponge for constructing 3D catalyst. The prepared MnO2-GS-Sponge composite catalyst exhibited excellent performance for removing HCHO at room temperature compared with GS and commercial MnO2. The MnO2-GS with larger specific surface area was dispersed evenly in nanosponge, which facilitated exposing more activate sites and achieving fast transport kinetics accelerating catalytic reaction for converting 97.1 % of 100 ppm of HCHO continuously to CO2 for 120 h. Moreover, rely on the chemisorption of amino groups on N-doping GS surface, HCHO could be enriched and efficient elimination (from 1000 ppb to12.5 ppb, at 35 °C in 48 h). The average oxidation state and infrared spectra analysis suggested that abundant oxygen vacancies on MnO2-GS-Sponge could be identified as surface-active sites of converting HCHO into the intermediates of dioxymethylene and formate. This work might inspire the designing 3D composite material for potential application in other fields of environmental engineering or energy industrial. ? 2022, The Authors. All rights reserved.