高内相乳液法制备高催化产 H₂O₂ 的多孔酚醛树脂

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中图分类号：0631.3 文献标志码：A

Abstract： Resorcinol-formaldehyde （RF） resin can photocatalytically generate hydrogen peroxide （H2O2） from pure water andoxygen systems.However，RFresin is typicallsynthesized assmoothsolid microspheres witharelativelysmallspecific surfacearea.Aditionally，thecommonlyused approach ofcombining it with other catalysts to enhance itscatalytic performance iscumbersome and increases thecost. Herein，hierarchical porous RF-based resins with good photocatalytic properties were synthesized by high internal phase emulsion （HIPE）template method using resorcinol （R），thiourea （T）， melamine （M） and formaldehyde （F） as monomers at 140°C . The specific surface area of the RTMF and RTF resin reached 172.5m2/g and 182.4m2/g ，respectively， when the volume fraction of the intermal phase was 80% The effects of thiourea/melamineratio，reaction temperature and the lightsourceonthe photocatalytic activityof theresinswere investigated. When nM：nT was 0：2 and nT+M：nF：nR was 2：8：1 ， the synthesized RTF resin exhibited remarkable photocatalytic performance with a high H2O2 yield of 751μmol/（g⋅h） under the irradiation of 3oo W Xe lamp and 295μmol/（g⋅h） under visiblelight illmination，whichwas3.6timesand3.1times thoseofRFresin，respectively，andalsoexcededthoseof RTF-h resin prepared by high-temperature hydrothermal method.As the reaction temperature increased to 180°C ，the photocatalytic H2O2 generation rate ofRTF-180 increased to 640μmol/（g⋅h） under visible light illumination. The systematical experiments revealed that the quinone content in resins played an important role in photocatalytic production of H2O2 .In addition， the mechanism studiesproved that RTF resin could photocatalyze H2O2 generation through both single-electron and two-electronreduction pathways.This study introduces a simple，economical and feasible approach forthestraightforward andefficient synthesisof photocatalysts with enhancedcatalytic performance，andthe as-prepared modifiedRFresins show potential application in the field of photocatalytic H2O2 production.

Key words： high internal phase emulsion template;hierarchical porous structure;photocatalysis;resorcinolformaldehyde resin; hydrogen peroxide

过氧化氢 H2O2⟩ 是一种用途广泛的氧化剂，在消毒、漂白和有机合成等领域有着广泛的应用。（剩余19298字）