Synergistic Effect of Electron Scattering and Space Charge Transfer Enabled Unprecedented Room Temperature NO2 Sensing Response of SnO2

Small - Tập 19 Số 48 - 2023
Yajie Zhang1, Yadong Jiang1, Zhen Yuan1, Bohao Liu1, Qiuni Zhao1, Qi Huang1, Ziteng Li2, Wen Zeng2, Zaihua Duan1, Huiling Tai1
1State Key Laboratory of Electronic Thin Films and Integrated Devices, School of Optoelectronic Science and Engineering, University of Electronic Science and Technology of China (UESTC), Chengdu, 610054 P. R. China
2College of Materials Science and Engineering, Chongqing University, Chongqing, 400030, P. R. China

Tóm tắt

AbstractMetal oxide gas sensors have long faced the challenge of low response and poor selectivity, especially at room temperature (RT). Herein, a synergistic effect of electron scattering and space charge transfer is proposed to comprehensively improve gas sensing performance of n‐type metal oxides toward oxidizing NO2 (electron acceptor) at RT. To this end, the porous SnO2 nanoparticles (NPs) assembled from grains of about 4 nm with rich oxygen vacancies are developed through an acetylacetone‐assisted solvent evaporation approach combined with precise N2 and air calcinations. The results show that the as‐fabricated porous SnO2 NPs sensor exhibits an unprecedented NO2‐sensing performance, including outstanding response (Rg/Ra = 772.33 @ 5 ppm), fast recovery (<2 s), an extremely low detection limit (10 ppb), and exceptional selectivity (response ratio >30) at RT. Theoretical calculation and experimental tests confirm that the excellent NO2 sensing performance is mainly attributed to the unique synergistic effect of electron scattering and space charge transfer. This work proposes a useful strategy for developing high‐performance RT NO2 sensors using metal oxides, and provides an in‐depth understanding for the basic characteristics of the synergistic effect on gas sensing, paving the way for efficient and low power consumption gas detection at RT.

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Tài liệu tham khảo

10.1038/s41563-018-0104-7

10.1016/j.jhazmat.2021.128174

10.1021/acssensors.2c02291

10.1039/D2TA03333J

10.1002/adfm.202203528

10.1016/j.jhazmat.2023.131184

10.1016/j.nantod.2021.101287

10.1016/j.snb.2015.08.040

10.1021/jp804916g

10.1002/adma.202002075

10.1038/s41467-021-25290-3

10.1016/j.matchemphys.2023.127768

10.1016/j.jallcom.2022.168690

10.1039/D0TA08743B

10.1002/adfm.202000435

10.1016/j.cej.2022.136449

10.3390/chemosensors10070289

10.1021/acsnano.1c08186

10.1007/s40145-021-0546-2

10.1016/j.cej.2022.136846

10.1016/j.snb.2021.129984

10.1016/j.jhazmat.2022.130316

10.1021/acssensors.1c02388

10.1002/adfm.202113348

10.1016/j.jcis.2022.01.009

10.1002/smll.202100438

10.1021/acsnano.0c05476

10.1021/acssensors.9b00310

10.1016/j.snb.2020.128706

10.1021/acssensors.0c00403

10.1016/j.snb.2021.130150

10.1016/j.snb.2014.08.003

10.1063/1.1929872

10.1134/S0036023618070197

10.1016/j.snb.2012.07.110

10.1039/C4CS00236A

10.1007/s10854-019-01232-0

10.1021/acsnano.0c03687

10.1038/s41467-023-35916-3

10.1016/j.apsusc.2021.151698

10.1021/acsami.7b18830

10.1088/1361-6528/ab5a1e

10.1016/0925-4005(91)80207-Z

10.1023/A:1023436725457

10.1016/j.jhazmat.2021.126414

10.7498/aps.69.20200653

10.1021/acsomega.9b01079

10.1016/j.snb.2019.127221

10.1021/cm051670c

10.1016/j.jhazmat.2022.128836

10.1016/j.electacta.2016.06.089

10.1016/j.ssc.2006.03.007

10.1016/j.snb.2020.129169

10.1006/jssc.1997.7596

10.1002/jrs.4078

10.1021/ja0493244

10.1103/PhysRevB.55.2666

10.1002/adfm.201401919

10.1002/adfm.202107439

10.1002/adfm.202104416

10.1002/adfm.202006598

10.1002/adma.202007605

10.1016/j.envint.2005.05.020

10.1039/D2TA06255K

10.1002/adma.201503825

10.1016/j.jcis.2023.04.157

10.1002/adma.202105869

10.1016/j.snb.2020.128828

10.1021/acssensors.1c00132

10.1039/D2NR01031C

10.1002/adma.202104958

10.1016/j.chempr.2020.09.026

10.1002/chem.200800987

10.1016/j.mtcomm.2022.103922

10.1016/j.commatsci.2005.04.010

10.1039/D1TA03578A

10.1016/j.snb.2022.131790

10.1021/acsami.9b01737

10.1002/advs.202203594

10.1021/acs.chemrev.1c00236

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Small

Tập 19 Số 48

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