Facile engineering of TiO2@Pd based hybrid heterogeneous nanostructures for enhanced NO2 gas sensing at room temperature under UV activation

被引:3
作者
Pham, Thi Minh Thu [1 ]
Pasupuleti, Kedhareswara Sairam [2 ]
Jeong, Tae Hyeon [1 ,3 ]
Lee, Seung Min [1 ]
Nguyen, Thi Hong Men [1 ]
Kim, Moon-Deock [2 ,4 ]
Kim, Young Heon [1 ]
机构
[1] Chungnam Natl Univ, Grad Sch Analyt Sci & Technol GRAST, 99 Daehak Ro, Daejeon 34134, South Korea
[2] Chungnam Natl Univ, Inst Quantum Syst IQS, 99 Daehak Ro, Daejeon 34134, South Korea
[3] Pukyong Natl Univ, Ctr Res Facil, 45 Yongso Ro, Busan 48513, South Korea
[4] Chungnam Natl Univ, Dept Phys, 99 Daehak Ro, Daejeon 34134, South Korea
基金
新加坡国家研究基金会;
关键词
PHOTOCATALYTIC ACTIVITY; SENSORS; TIO2; NANOPARTICLES; METHANE;
D O I
10.1039/d4nr03213f
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Highly sensitive sub-ppb level NO2 gas sensors based on hybrid heterostructures made out of metal nanoparticles (NPs) and porous metal oxide semiconductors are of great significance in environmental monitoring and medical diagnosis. Herein, we report the successful synthesis of a Pd nanoparticle decorated porous TiO2 nanostructure-based hybrid Schottky heterostructure and its application in room temperature (RT similar to 30 degrees C) low-ppb level NO2 detection under UV activation. The optimized TiO2@Pd 50 hybrid heterogeneous nanostructures (HNs) showed an excellent NO2 (100 ppm) gas sensing response of 175.42%, excellent cycling stability, outstanding selectivity, low detection limit (similar to 82 ppb) and fast response/recovery speed (48/72 s) under UV illumination. Moreover, the as-prepared hybrid sensor demonstrates reliable reproducibility and robust sensing responses under various elevated temperatures (30-200 degrees C) and relative humidity conditions (0-80% RH) towards NO2. The excellent RT NO2 gas sensing properties of TiO2@Pd 50 HNs are primarily attributed to the improved surface area, enhanced oxygen vacancies, low charge carrier recombination, and catalytic effect triggered by the hot electrons induced, from the localized plasmonic resonance effect of Pd NPs, resulting in effective NO2 adsorption/desorption dynamics. The Schottky junction formation at the hybrid TiO2@Pd 50 HNs interface effectively aids in the separation of charge carriers via band bending, leading to excellent charge transfer between the NO2 molecules and the heterointerface under UV light, yielding substantial sensitivity and selectivity to NO2. The present work is expected to provide a strategic route for designing and fabricating sub-ppb level high-performance NO2 sensors based on hybrid heterostructures.
引用
收藏
页码:22252 / 22266
页数:15
相关论文
共 50 条
[41]   High-performance UV-activated room temperature NO2 sensors based on TiO2/In2O3 composite [J].
Cai, Zhicheng ;
Park, Jiho ;
Jun, Doyeon ;
Park, Sunghoon .
CRYSTENGCOMM, 2023, 25 (17) :2546-2556
[42]   Pd- and PdO-Decorated TiO2 Nanospheres: Hydrogen Sensing Properties under Visible Light Conditions at Room Temperature [J].
Thathsara, Thilini ;
Harrison, Christopher J. ;
Hocking, Rosalie K. ;
Shafiei, Mahnaz .
CHEMOSENSORS, 2023, 11 (07)
[43]   A comparative study on UV light activated porous TiO2 and ZnO film sensors for gas sensing at room temperature [J].
Chen, Hao ;
Liu, Yuan ;
Xie, Changsheng ;
Wu, Jun ;
Zeng, Dawen ;
Liao, Yichuan .
CERAMICS INTERNATIONAL, 2012, 38 (01) :503-509
[44]   Room Temperature Formaldehyde Sensing of Hollow SnO2/ZnO Heterojunctions Under UV-LED Activation [J].
Zhao, Lijia ;
Chen, Yupeng ;
Li, Xinyu ;
Li, Xiaogan ;
Lin, Shiwei ;
Li, Tie ;
Rumyantseva, Marina N. ;
Gaskov, Alexander M. .
IEEE SENSORS JOURNAL, 2019, 19 (17) :7207-7214
[45]   Synthesis and room-temperature NO2 gas sensing properties of a WO3 nanowires/porous silicon hybrid structure [J].
Zeng Peng ;
Zhang Ping ;
Hu Ming ;
Ma Shuang-Yun ;
Yan Wen-Jun .
CHINESE PHYSICS B, 2014, 23 (05)
[46]   Semiconductor-type SnO2-based NO2 sensors operated at room temperature under UV-light irradiation [J].
Hyodo, Takeo ;
Urata, Kaoru ;
Kamada, Kai ;
Ueda, Taro ;
Shimizu, Yasuhiro .
SENSORS AND ACTUATORS B-CHEMICAL, 2017, 253 :630-640
[47]   Facile synthesis of MOFs derived TiO2/ZnO porous composite materials for enhanced ammonia sensing properties at room temperature [J].
Namratha, E. ;
Babu, M. S. Surendra ;
Reddy, A. Jagan Mohan .
CHEMICAL PHYSICS LETTERS, 2025, 869
[48]   Enhancing NO2 gas sensing performances at room temperature based on reduced graphene oxide-ZnO nanoparticles hybrids [J].
Liu, Sen ;
Yu, Bo ;
Zhang, Hao ;
Fei, Teng ;
Zhang, Tong .
SENSORS AND ACTUATORS B-CHEMICAL, 2014, 202 :272-278
[49]   UV-activated WS2/SnO2 2D/0D heterostructures for fast and reversible NO2 gas sensing at room temperature [J].
Xia, Yi ;
Xu, Lei ;
He, Sufang ;
Zhou, Liexing ;
Wang, Mingjun ;
Wang, Jing ;
Komarneni, Sridhar .
SENSORS AND ACTUATORS B-CHEMICAL, 2022, 364
[50]   Investigations on the crystal growth mechanism of one-pot-synthesized Al-doped ZnO and its UV-enhanced room temperature NO2 gas sensing characteristics [J].
Vogel, Leah ;
Wagner, Ricarda ;
Moos, Ralf ;
Schoenauer-Kamin, Daniela .
FUNCTIONAL MATERIALS LETTERS, 2018, 11 (04)