首页|An advanced 2D/3D g-C3N4/TiO2@MnO2 multifunctional membrane for sunlight-driven sustainable water purification

An advanced 2D/3D g-C3N4/TiO2@MnO2 multifunctional membrane for sunlight-driven sustainable water purification

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Graphitic carbon nitride(g-C3N4)nanosheets have attracted widespread interest in the construction of advanced separation membranes.However,dense stacking and a single functionality have limited the membrane development.Here,an advanced two-/three-dimensional(2D/3D)g-C3N4/TiO2@MnO2 membrane is constructed by intercalating 3D TiO2@MnO2 nanostructures into g-C3N4 nanosheets.The 3D flower-like nanostructures broaden the transport channels of the composite membrane.The membrane can effectively separate five oil-in-water(O/W)emulsions,with a maximum flux of 3265.67±15.01 L·m-2·h-1·bar-1 and a maximum efficiency of 99.69％±0.45％for toluene-in-water emulsion(T/W).Meanwhile,the TiO2@MnO2 acts as an excellent electron acceptor and provides positive spatial separation of electrons-holes(e--h+).The formation of 2D/3D heterojunctions allows the material with wider light absorption and smaller bandgap(2.10 eV).These photoelectric properties give the membrane good degradation of three different pollutants,with about 100％degradation for methylene blue(MB)and malachite green(MG).The photocatalytic antibacterial efficiency of the membrane is also about 100％.After cyclic experiment,the membrane maintains its original separation and photocatalytic capabilities.The remarkable multifunctional and self-cleaning properties of the g-C3N4 based membrane represent its potential value for complex wastewater treatment.

graphitic carbon nitride(g-C3N4)based membranethree-dimensional(3D)nanostructuresself-cleaningmultifunction

Fan Yu、Chunjia Luo、Xiaohan Niu、Min Chao、Pengfei Zhang、Luke Yan

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Polymer Materials & Engineering Department,School of Materials Science & Engineering,Chang an University,Xi'an 710064,China

Key Laboratory of Road Construction Technology and Equipment,MOE,Chang an University,Xi'an 710064,China

School of Textile Science and Engineering,Xi'an Polytechnic University,Xi'an 710064,China

Fundamental Research Funds for the Central Universities,CHDFundamental Research Funds for the Central Universities,CHDShaanxi Key Research & Development ProjectInnovation Capability Support Program of ShaanxiChina Postdoctoral Science Foundation

3001023124033001023132082022GY-4032023-CX-TD-432020M683395

2024

10.1007/s12274-023-6071-6

纳米研究(英文版)

纳米研究(英文版)

CSTPCD
ISSN：
年,卷(期)：2024.17(4)
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