Silk fibroin-derived nitrogen-doped carbon quantum dots anchored on TiO2 nanotube arrays for heterogeneous photocatalytic degradation and water splitting - Details

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Abstract：

Bombyx　mori　silk,　a　natural　nitrogen-rich　biopolymer　protein,　is　earth-abundant　and　sustainable.　In　this　study,　nitrogen-doped　carbon　quantum　dots　(N-CQDs)　derived　from　Bombyx　mori　silk　fibroin　are　immobilized　onto　TiO2　nanotube　arrays　(TiO2　NTAs)　by　a　facile　hydrothermal　process.　The　resulting　N-CQDs　decorated　TiO2　NTA　heterostructures　(N-CQDs@TiO2　NTAs)　display　a　maximum　incident　photon-to-electron　conversion　efficiency　(IPCE)　of　32.5%　under　450　nm　monochromatic　light　in　neutral　solution.　Compared　with　pristine　TiO2　NTAs,　the　N-CQDs-decorated　TiO2　NTAs　demonstrate　significantly　improved　photocatalytic　efficiency　during　the　degradation　of　organic　contaminants.　Furthermore,　the　constructed　heterostructures　are　used　to　split　water　to　investigate　their　photocatalytic　promise,　yielding　the　maximum　H2　and　O2　production　rates　of　30.12　and　14.96　μmol　cm−2　h−1,　respectively.　Optimizing　the　N-CQD　coating　is　found　to　effectively　tune　the　bandgap　and　up-conversion　capability　of　the　heterostructures,　enabling　unique　photon　harvest　and　boosting　photocatalytic　activity.　This　study　provides　a　proof　of　concept　that　nonmetal,　abundant,　and　sustainable　materials　can　be　exploited　to　enhance　the　photocatalytic　capability　of　TiO2,　imparting　a　variety　of　unique　applications　such　as　water　purification　and　chemical　fuel　production.　©　2020　Elsevier　Ltd

Keyword：

Hydrogen generation; Nitrogen-doped carbon quantum dots; Photocatalytic activity; Pollutants degradation; TiO2 nanotube arrays

Community：

[ 1 ] [Wang, Q.]Shanghai Engineering Research Center for Clean Production of Textile Chemistry, School of Fashion Engineering, Shanghai University of Engineering Science, Shanghai, 201620, China
[ 2 ] [Wang, Q.]College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, 215123, China
[ 3 ] [Wang, Q.]National Engineering Laboratory for Modern Silk, College of Textile and Clothing Engineering, Soochow University, Suzhou, 215123, China
[ 4 ] [Cai, J.]National Engineering Laboratory for Modern Silk, College of Textile and Clothing Engineering, Soochow University, Suzhou, 215123, China
[ 5 ] [Cai, J.]Soochow Institute for Energy and Materials Innovations (SIEMIS), Key Laboratory of Advanced Carbon Materials and Wearable Energy, Technologies of Jiangsu Province, Soochow University, Suzhou, 215006, China
[ 6 ] [Biesold-McGee, G.V.]School of Materials Science and Engineering Georgia Institute of Technology, Atlanta, GA 30332, United States
[ 7 ] [Huang, J.]National Engineering Research Center of Chemical Fertilizer Catalyst (NERC-CFC), College of Chemical Engineering, Fuzhou University, Fuzhou, 350116, China
[ 8 ] [Ng, Y.H.]School of Energy and Environment, City University of Hong Kong, Kowloon, Hong Kong, SAR, Hong Kong
[ 9 ] [Ng, Y.H.]Particles and Catalysis Research Group, School of Chemical Engineering, University of New South Wales, Sydney, NSW 2052, Australia
[ 10 ] [Sun, H.]College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, 215123, China
[ 11 ] [Sun, H.]International Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS), Tsukuba, 305-0044, Japan
[ 12 ] [Wang, J.]Shanghai Engineering Research Center for Clean Production of Textile Chemistry, School of Fashion Engineering, Shanghai University of Engineering Science, Shanghai, 201620, China
[ 13 ] [Lai, Y.]National Engineering Research Center of Chemical Fertilizer Catalyst (NERC-CFC), College of Chemical Engineering, Fuzhou University, Fuzhou, 350116, China
[ 14 ] [Lin, Z.]School of Materials Science and Engineering Georgia Institute of Technology, Atlanta, GA 30332, United States

Reprint 's Address：

[Lin, Z.]School of Materials Science and Engineering Georgia Institute of Technology, National Engineering Research Center of Chemical Fertilizer Catalyst (NERC-CFC), College of Chemical Engineering, Fuzhou University, National Engineering Research Center of Chemical Fertilizer Catalyst (NERC-CFC), College of Chemical Engineering, Fuzhou UniversityUnited States

Email：

zhiqun.lin@mse.gatech.edu

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Source ：

Nano Energy

ISSN： 2211-2855

Year： 2020

Volume： 78

1 7 . 8 8 1

JCR@2020

1 6 . 8 0 0

JCR@2023

ESI HC Threshold：196

JCR Journal Grade：1

CAS Journal Grade：1

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WoS CC Cited Count：

SCOPUS Cited Count： 99

ESI Highly Cited Papers on the List： 0 Unfold All

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Chinese Cited Count：

30 Days PV： 0

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