Article
Chemistry, Analytical
Vo Thanh Duoc, Chu Manh Hung, Hugo Nguyen, Nguyen Van Duy, Nguyen Van Hieu, Nguyen Duc Hoa
Summary: The grafted structures between SnO2 and ZnO nanowires were achieved through a two-step growth process, showing promising sensitivity for NO2 gas sensing.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Chemistry, Analytical
Xiangxiang Chen, Sikai Zhao, Pengfei Zhou, Baoyu Cui, Wenbao Liu, Dezhou Wei, Yanbai Shen
Summary: A room-temperature NO2 gas sensor based on Au-functionalized CuO nanorods was fabricated in this study. By controlling the amount of Au functionalization, the sensitivity and recovery performance can be optimized, showing good selectivity and repeatability. The sensing mechanism of the materials to NO2 was investigated through changes in energy band gap and activation energy with Au functionalization.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Chemistry, Physical
Yaqing Zhang, Zhimin Yang, Liang Zhao, Teng Fei, Sen Liu, Tong Zhang
Summary: In this work, highly sensitive NO2 sensors were fabricated using alpha-Fe2O3 and SnO2 co-decorated RGO hybrids as sensing materials. The bandgap energy of alpha-Fe2O3/SnO2-RGO hybrids was reduced compared to SnO2 modified RGO hybrids, which facilitated the release of more electrons and formation of more oxygen ions at room temperature. The sensors showed excellent response towards NO2, with the alpha-Fe2O3/SnO2-RGO-15-based sensor achieving the highest response of 7.4 towards 1 ppm NO2. The sensor also demonstrated superior repeatability and potential application in NO2 detection.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Chemistry, Analytical
Myung Sik Choi, Han Gil Na, Jae Hoon Bang, Ali Mirzaei, Seungmin Han, Ha Young Lee, Sang Sub Kim, Hyoun Woo Kim, Changhyun Jin
Summary: Gas sensors were fabricated by decorating amorphous carbon layers on SnO2 nanowires, without the need for pretreatment or functionalization, and operated at room temperature. The amorphous carbon increased surface area and improved NO(2) gas sensing by providing electronic effects to the SnO2.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Biochemistry & Molecular Biology
Jiannan Song, Zhongtang Xu, Menghan Wu, Xilai Lu, Zhiqiao Yan, Feng Chen, Wanping Chen
Summary: Composite ceramics of metal oxides and noble metals have been widely studied for sensing reducing gases at room temperature. In this study, composite ceramics of SnO2 and noble metals were prepared and found to be effective in sensing oxidizing NO2 at room temperature. The Pt-Au-SnO2 composite nanoceramics showed the largest increase in resistance when exposed to NO2, with a high response and fast recovery time. The presence of water molecules in the air was found to be crucial for the recovery of resistance in the composite ceramics. Overall, this study establishes a room temperature NO2-sensing mechanism and highlights the potential of composite ceramics for sensing both reducing and oxidizing gases at room temperature.
Article
Chemistry, Physical
Yanhui Sun, Zhihua Luo, Shupeng Sun, Chuanxi Wang, Zhen Li, Haiying Du
Summary: The design of high-performance NO2 sensors that work at room-temperature is crucial for expanding the range of NO2 detection applications. In this study, Cr-modified ZnO@ graphene-like UC composite sensors were prepared to improve the detection sensitivity of ZnO to NO2 at room temperature. The sensor exhibited excellent NO2 sensing performance, with a response value of 2.7 at a NO2 concentration of 1 ppm. The enhanced sensing performance was attributed to the band gap narrowing and improved electron transition ability due to Cr modification, as well as the formation of new chemical bonds and enhanced electron transfer through orbital hybridization of O, Cr, and ZnO.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Biotechnology & Applied Microbiology
Ahmad Umar, Ahmed A. Ibrahim, Hassan Algadi, Hasan Albargi, Mabkhoot A. Alsairi, Yao Wang, Sheikh Akbar
Summary: Herein, a room-temperature NO2 gas sensor based on supramolecularly assembled isonicotinamide-graphene oxide nanocomposite (Iso-rGO) and Iso-rGO/Carbon felt (CF) electrode was prepared and studied. The sensor showed excellent reductive behavior of NO2 gas at room temperature, with a linear range of 1-30 ppm and a low detection limit of 1 ppm. The Iso-rGO/CF electrode exhibited high sensitivity and good stability for more than 30 days, making it suitable for the sensitive detection of gaseous NO2 in real samples.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2022)
Article
Chemistry, Physical
Lili Li, Chenguang Wang, Zhihua Ying, Wei Wu, Yongqian Hu, Weihuang Yang, Weipeng Xuan, Yang Li, Fei Wen
Summary: This paper reported a low concentration CO gas sensor based on SnO2 modified graphene nanocomposite at 25 degrees C. The SnO2/graphene nanocomposite exhibited higher CO gas sensing performance than pure SnO2, showing a high response to CO at 25 degrees C, shorter response and recovery times, excellent repeatability and stability. The excellent CO sensing performance of the composite is attributed to graphene's ability to provide a large surface area for adsorption sites and prevent the disagglomeration of SnO2 nanoparticles.
CHEMICAL PHYSICS LETTERS
(2023)
Article
Nanoscience & Nanotechnology
Weimeng Zheng, Zhongyue Zhang, Nannan Liu, Qingyu Li, Jianbo Sun
Summary: Heterolayered SnO2/SnSe nanosheet composites were synthesized and used as a highly sensitive sensor for NO2 detection at room temperature. The sensor exhibited high sensitivity and selectivity, as well as a low detection limit. The improved sensing performance was attributed to the presence of abundant heterojunctions and enhanced interface charge transfer in the material.
ACS APPLIED NANO MATERIALS
(2022)
Article
Chemistry, Analytical
Dipyaman Mohanta, Md Ahmaruzzaman
Summary: A novel gas sensor based on Ag nanoparticles, tin oxide, and carbon nitride nanocomposite (Ag-SnO2-beta C3N4) was successfully fabricated and showed excellent sensitivity towards room-temperature NO2 gas sensing. The ternary nanocomposite sensor exhibited superior response time and recovery time for low concentrations of NO2 gas, attributed to its higher conductivity and catalytic activity. Additionally, the sensor displayed synergistic response compared to other sensors, showcasing its potential for gas-sensing applications.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Nanoscience & Nanotechnology
Weiqi Wang, Jiamu Cao, Rongji Zhang, Huaxin Xiu, Yufeng Zhang
Summary: In this study, a MoS2/AuPt/SnO2 nanocomposite device was fabricated by interfacially engineering a MoS2/SnO2 nanostructure using Au and Pt bimetallic nanoparticles. The device exhibited remarkable sensing response, short response time, and excellent baseline recovery to NO2 gas at room temperature, as well as high sensitivity, low detection limit, commendable reversibility, stability, and selectivity against various gases. This work advances the development of room-temperature gas-sensitive nanomaterials and shows promise for applications in ultralow power-integrated sensors.
ACS APPLIED NANO MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Ying Wang, Jimin Fu, Haibo Hu, Derek Ho
Summary: This work presents a functionalization methodology for MXene based on d-band center modulation, which significantly improves gas sensing response and selectivity. The optimized gas sensor shows unprecedented performance among all reported MXene gas sensors, with a response of 50% toward 10 ppm of NO2 at room temperature.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Nanoscience & Nanotechnology
Jaehyeok Shin, Sangmoon Han, Siyun Noh, Yeon-Tae Yu, Jin Soo Kim
Summary: This study demonstrates the successful development of a light-assisted NO2 gas sensor with high response at room temperature, using high-crystalline undoped-GaN nanowires and graphene. The sensor shows good long-term stability and selectivity to NO2 gas, surpassing previous GaN-based sensors. The use of undoped-GaN nanowires simplifies the fabrication process for room-temperature gas sensors without the need for additional catalysts.
Article
Chemistry, Physical
Qiumei Wang, Lihao Zhou, Shaobo Li, Xiao Chang, Xianghong Liu, Jun Zhang
Summary: In this study, In2O3/SnO2 heterostructures were designed using atomic layer deposition (ALD), which regulated the energy band structure and enhanced the electron transfer, resulting in improved adsorption of target gases. The sensors based on In2O3/SnO2 demonstrated outstanding performance at room temperature, with a response of 2900 to 10 ppm NO2 and a detection limit of 61 ppb. Density functional theory (DFT) calculations showed significant enhancement in charge transfer and interaction energy between In2O3/SnO2 and NO2.
APPLIED SURFACE SCIENCE
(2023)
Article
Engineering, Electrical & Electronic
Zhengkun Wu, Yanrong Wang, Peizhe Wang, Xu Cheng, Qiao Wang, Yifan Yang, Yibing Luo, Beixi An, Erqing Xie
Summary: The development of simple and low-cost materials and methods for NO2 sensors is crucial for their commercialization. Au-modified SnO2 nanorods synthesized via hydrothermal method combined with photodeposition exhibit excellent NO2-sensing properties, including high response, low detection limit, and fast response/recovery time at room temperature. The sensor also shows good selectivity, repeatability, long-term stability, and performs well in a high-humidity environment.
IEEE SENSORS JOURNAL
(2023)
Article
Chemistry, Physical
Ruozhen Wu, Juanyuan Hao, Shengliang Zheng, Quan Sun, Tingting Wang, Di Zhang, Hui Zhang, You Wang, Xin Zhou
Summary: The engineered N-doped MoS2 sensor shows rapid room-temperature response and recovery for NO2 detection, with high sensitivity, low detection limit, excellent selectivity, repeatability, and humidity resistance. The fast response and recovery mechanism is triggered by the synergistic effect of N dopants creating new active sites and facilitating fast charge transfer. This result could potentially advance the development of TMDs-based sensing materials for improved room-temperature performance.
APPLIED SURFACE SCIENCE
(2022)
Article
Engineering, Environmental
Quan Sun, Zhongmiao Gong, Yijian Zhang, Juanyuan Hao, Shengliang Zheng, Wen Lu, Yi Cui, Lizhao Liu, You Wang
Summary: Defect and interlayer engineering are two promising strategies to alter the electronic structures of sensing materials for improved gas sensing properties. The ethylene glycol intercalated Al-doped SnS2 (EG-Al-SnS2) developed in this study exhibited enhanced NO2 sensing performance at room temperature due to the synergistic effect of Al doping, S vacancies, and expanded interlayer spacing.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Chemistry, Physical
Tingting Wang, Jiaying Liu, Yanling Zhang, Qihua Liang, Ruozhen Wu, Hsu-Sheng Tsai, You Wang, Juanyuan Hao
Summary: In this work, a visible-light-modulated strategy was used to achieve bifunctional detection of NO2 and H2S by utilizing Bi2S3/SnS2 heterostructures as sensing materials. The sensor exhibited superior sensitivity towards NO2 under light irradiation and high selectivity to H2S in the dark at room temperature. Moreover, the sensor demonstrated rapid response-recovery speed, outstanding repeatability, and reliable stability to ppb-level target gases.
JOURNAL OF MATERIALS CHEMISTRY A
(2022)
Article
Chemistry, Physical
Di Zhang, Maoquan Wu, Juanyuan Hao, Shengliang Zheng, Yang Yang, Tongjie Yao, You Wang
Summary: The BiOBr/Bi2Sn2O7 heterojunction with oxygen vacancies (OVs) was constructed by depositing Bi2Sn2O7 nanoparticles on the Vo-BiOBr surface. The results showed that the heterojunction with OVs exhibited better performance in degrading pollutants. The OVs enhanced the performance by improving charge carrier separation efficiency, increasing visible light absorption, and decreasing the conduction band position.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Chemistry, Physical
Yongchao Yang, Tiezhu Xin, Chengli Liu, Tianyue Zhang, Weixun Hao, You Wang, Juanyuan Hao
Summary: This study demonstrates high-sensitivity detection of ppb-level NO2 at room temperature using urchin-like Bi2S3 nanostructures with sulfur defects. The optimized sensor shows an ultrahigh sensing response, short response/recovery time, and ultralow theoretical detection limit. The improved sensing performance is attributed to sulfur vacancies and distinctive hierarchical structures.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Physics, Applied
Zhiwen Liang, Ye Yuan, Pengwei Wang, JunJie Kang, Qi Wang, Guoyi Zhang
Summary: This study comprehensively investigated the ex situ sputtered AlN buffer and GaN epilayer grown by metalorganic chemical vapor deposition. The study revealed that the AlN buffer deposited by sputtering technique could be oxidized in the atmosphere, which significantly affected the characteristics of the GaN epilayer. This finding has important guiding significance for the growth of high-quality III-nitride materials.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2023)
Article
Chemistry, Multidisciplinary
Juanyuan Hao, Wen Lu, Dongmin Yin, Weixun Hao, You Wang
Summary: In this study, Ag3PO4-SnSe2 heterostructures were constructed as a NO2 sensing material to work under highly humid environments at room temperature. The sensor exhibited an increased response with the increase in relative humidity, which was attributed to the chemical inertness of SnSe2 and high affinity of Ag3PO4 to H2O molecules. Moreover, the sensor showed a high sensing response (6.8) to 5 ppm NO2 and a short response/recovery time (31/108 s) at room temperature.
NEW JOURNAL OF CHEMISTRY
(2023)
Article
Biophysics
Hui Zhang, Ruihan Liu, Peng Wan, Shanshan Li, Zongjun Liu, You Wang, Fang Han, Juanyuan Hao, Yu Li
Summary: Tumor cells obtain energy from mitochondrial respiration and glycolysis. A multifunctional nanoenabled energy interrupter (HNHA-GC) was prepared by attaching glucose oxidase (GOx), hyaluronic acid (HA), and 10-hydroxycamptothecin (CPT) on degradable hydroxyapatite (NHA) nanorods. HNHA-GC demonstrated promising therapeutic potential by simultaneously cutting off mitochondrial and glycolytic ATP production through Ca2+ overload, chemotherapy, and starvation therapy.
COLLOIDS AND SURFACES B-BIOINTERFACES
(2023)
Article
Engineering, Environmental
Ruozhen Wu, Junpeng Mao, Han Li, Yongchao Yang, Weixun Hao, You Wang, Juanyuan Hao
Summary: Understanding the relationship between sensing behavior and energy level is essential for predicting gas-sensing materials and designing sensors. This study reports the tunable SnS1-xSex (x = 0.2, 0.4, 0.6, 0.8) van der Waals alloy and reveals the correlation between response value and Fermi level. The results show that increasing the gap between the Fermi level and the molecular orbital of NO2 by tuning the Se content can enhance the response value for NO2.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
Yongchao Yang, Junpeng Mao, Dongmin Yin, Tianyue Zhang, Chengli Liu, Weixun Hao, You Wang, Juanyuan Hao
Summary: In this study, BiOCl/Bi2S3_x heterostructures with rich S vacancies were synthesized through the integration of vacancy defect and heterostructure engineering to enhance NO2 gas sensing performance. The optimized sensor exhibited a high response value (Rg/Ra = 29.1) to 1 ppm NO2 at room temperature, 17 times higher than pure Bi2S3. The enhanced response of the S-vacancy-rich BiOCl/Bi2S3_x heterostructures was attributed to improved electron migration at the heterointerface and additional exposed active sites caused by S vacancies in Bi2S3_x. Additionally, the sensors showed good long-term stability, outstanding selectivity, and good flexibility. This study provides an effective method for synergistically engineering defect and heterostructure to enhance gas sensing properties at room temperature.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Yanchao Guan, Ye Ding, Yuqiang Fang, Genwang Wang, Shouxin Zhao, Lianfu Wang, Jingtao Huang, Mengxin Chen, Juanyuan Hao, Chengyan Xu, Liang Zhen, Fuqiang Huang, Yang Li, Lijun Yang
Summary: In this study, a well-controlled laser-driven transformation from metallic 2M-WS2 to semiconducting 2H-WS2 is reported, without thinning or ablation. Additionally, a highly ordered 2H/2M nano-periodic phase transition is achieved, overcoming the size limitation of laser-driven phase transition. The resulting 2H-WS2 exhibits competitive gas sensing performance and fast response/recovery time.
Article
Chemistry, Physical
Shengliang Zheng, Dongmin Yin, Shengpei Zhang, You Wang, Jiayu Li, Zhengjia Wang, Ye Yuan, Hsu-Sheng Tsai, Juanyuan Hao
Summary: The influence of vacancy defects on the gas sensing performance of MoSe2 is studied, and it is found that defect engineering can enhance the gas sensing response. The increase in adsorption energy and decrease in charge transfer caused by vacancies are the reasons for the improvement in sensing performance.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Chemistry, Multidisciplinary
Junpeng Mao, Dongmin Yin, Wen Lu, You Wang, Zhenze Zhou, Weixun Hao, Xiangqun Chen, Juanyuan Hao
Summary: SnSe2/Ag2Se n-n heterojunctions with an accumulation layer are fabricated via hydrothermal method, which exhibit improved response value and shorter response/recovery time compared to pristine SnSe2 sensor. The SnSe2/Ag2Se sensor shows good selectivity for NO2 detection, making it suitable for practical applications.
NEW JOURNAL OF CHEMISTRY
(2023)
Article
Chemistry, Inorganic & Nuclear
Jiaying Liu, Tiezhu Xin, Zizhen Yang, Weixun Hao, You Wang, Juanyuan Hao
Summary: A Bi2S3/ZnS heterostructure has been developed as a sensing material with improved sensitivity towards H2S, especially in dark conditions. The sensor shows high response rate, excellent selectivity, and stability, making it suitable for practical applications in dark and humid environments.
INORGANIC CHEMISTRY FRONTIERS
(2022)
Article
Chemistry, Physical
Ruozhen Wu, Tiezhu Xin, You Wang, Tingting Wang, Lizhao Liu, Juanyuan Hao
Summary: Heterostructure construction is an effective strategy for enhancing the properties of functional materials. In this study, a lattice-matched SnS2/SnSe2 in-plane heterostructure was built as a NO2 gas sensor, demonstrating improved sensing properties. The atomic-level sharp in-plane SnS2/SnSe2 heterointerface with a lateral built-in field played a key role in improving NO2 adsorption and interfacial charge transfer. This ion-exchange growth method of 2D in-plane heterostructures is expected to find applications in sensors, photoelectronics, and catalysts.
JOURNAL OF MATERIALS CHEMISTRY A
(2022)