Synthesis of CdS QDs/NH2-Nb2O5 via electrostatic self-assembly method for highly efficient photocatalytic removal of NO and synchronous inhibition of NO2 - Details

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Abstract：

A　two-step　electrostatic　self-assembly　method　was　used　to　first　graft　–NH2　groups　onto　the　Nb2O5　followed　by　loading　of　CdS　QDs　onto　the　NH2-Nb2O5　to　obtain　CdS/NH2-Nb2O5.　The　performance　of　the　samples　under　visible　light　was　evaluated　under　simulated　conditions　of　25　°C　and　varying　relative　humidity　(RHs).　The　results　showed　that　with　the　increase　of　RH,　the　NO　removal　efficiency　by　CdS/NH2-Nb2O5　increased　first　and　then　decreased,　reaching　the　maximum　NO　removal　efficiency　when　RH　=　50　%.　The　selectivity　of　NO2　on　CdS/NH2-Nb2O5　(9.01　%)　was　significantly　lower　compared　to　that　of　Nb2O5　(24.44　%)　and　NH2-Nb2O5　(19.72　%).　The　introduction　of　–NH2　groups　and　CdS　QDs　significantly　enhanced　visible　light　absorption　and　improved　the　separation　efficiency　of　photogenerated　charge　carriers.　In-situ　DRIFTS　analysis　revealed　that　Cd2+　served　as　an　additional　active　site　for　NO　adsorption.　Furthermore,　CdS　had　a　relatively　negative　conduction　band　position,　which　was　conducive　to　the　generation　of　[rad]O2–,　further　inhibiting　the　generation　of　NO2.　This　work　provides　a　new　approach　to　the　design　and　preparation　of　catalysts　for　photocatalytic　oxidation　of　NO.　©　2024　Elsevier　B.V.

Keyword：

CdS/NH2-Nb2O5 Electrostatic self-assembly method Photocatalytic NO removal Visible light

Community：

[ 1 ] [Song X.]Hubei Key Laboratory of Pollutant Analysis & Reuse Technology, College of Chemistry and Chemical Engineering, Hubei Normal University, Huangshi, 435002, China
[ 2 ] [Song X.]Research Institute of Photocatalysis, State Key Laboratory of Photocatalysis on Energy and Environment, Fuzhou University, Fuzhou, 350002, China
[ 3 ] [Jin X.]Hubei Key Laboratory of Pollutant Analysis & Reuse Technology, College of Chemistry and Chemical Engineering, Hubei Normal University, Huangshi, 435002, China
[ 4 ] [Yang J.]Hubei Key Laboratory of Pollutant Analysis & Reuse Technology, College of Chemistry and Chemical Engineering, Hubei Normal University, Huangshi, 435002, China
[ 5 ] [Ruan M.]Hubei Key Laboratory of Pollutant Analysis & Reuse Technology, College of Chemistry and Chemical Engineering, Hubei Normal University, Huangshi, 435002, China
[ 6 ] [Wang Y.]Hubei Key Laboratory of Pollutant Analysis & Reuse Technology, College of Chemistry and Chemical Engineering, Hubei Normal University, Huangshi, 435002, China
[ 7 ] [Tao J.]Hubei Key Laboratory of Pollutant Analysis & Reuse Technology, College of Chemistry and Chemical Engineering, Hubei Normal University, Huangshi, 435002, China
[ 8 ] [Hu D.]Hubei Key Laboratory of Pollutant Analysis & Reuse Technology, College of Chemistry and Chemical Engineering, Hubei Normal University, Huangshi, 435002, China
[ 9 ] [Cheng G.]Key Laboratory of Greenhouse Gas Accounting and Carbon Reduction of Jiangxi Province, Institute of Energy Research, Jiangxi Academy of Sciences, Nanchang, 330096, China
[ 10 ] [Dai W.]Research Institute of Photocatalysis, State Key Laboratory of Photocatalysis on Energy and Environment, Fuzhou University, Fuzhou, 350002, China

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Separation and Purification Technology

ISSN： 1383-5866

Year： 2025

Volume： 357

8 . 2 0 0

JCR@2023

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ESI Highly Cited Papers on the List： 0 Unfold All

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