Article
Engineering, Environmental
Yanqiao Ding, Xuezheng Guo, Delin Kuang, Xiaofei Hu, Yong Zhou, Yong He, Zhigang Zang
Summary: This study synthesized ternary MoS2-rGO-Cu2O composites with enhanced ppb-level NO2 sensing characteristics, achieving highest response to 500 ppb NO2 at room temperature compared to pure MoS2 and binary MG15. The synergy of shell-structure, mesoporous, heterojunction construction, and enhanced conductivity contributed to the improved sensing performance of the ternary sensor.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Nanoscience & Nanotechnology
Sunil Kumar, Veronika A. Dmitrieva, Gang Meng, Stanislav A. Evlashin, Ekaterina V. Sukhanova, Dmitry G. Kvashnin, Zakhar I. Popov, Alexander G. Bannov, Fedor S. Fedorov, Albert G. Nasibulin
Summary: We improved the sensitivity of NO2 analyte by adjusting the width ratio of adjacent graphene oxide (GO) and reduced graphene oxide (rGO) layers using GO laser reduction technique. The reduction of GO led to a chemiresistive response to NO2, and an optimum GO/rGO width ratio achieved a chemiresistive response of 18.1% towards 100 ppm of NO2 with a limit of detection of 230 ppb. The enhanced chemiresistive response of GO/rGO sensors to NO2 physisorption was attributed to increased sorption energy and improved charge transfer at the GO/rGO interface area compared to fully reduced GO.
ACS APPLIED NANO MATERIALS
(2023)
Article
Chemistry, Analytical
Joon-Young Kang, Won-Tae Koo, Ji-Soo Jang, Dong-Ha Kim, Yong Jin Jeong, Rheehyun Kim, Jaewan Ahn, Seon-Jin Choi, Il-Doo Kim
Summary: The study demonstrates the heterogeneous sensitization of nanocatalysts using Pt and ZnO nanoparticles (NPs) on porous reduced graphene oxides (Pt_ZnO/PRGO) driven by a metal-organic framework (MOF)-templated synthesis and subsequent pyrolysis. Pt_ZnO/PRGO showed improved NO2 sensing properties with increased reaction sites and controllable size of ZnO NPs, exhibiting reversible reaction kinetics. The potential applications of MOF-derived Pt_ZnO/PRGO in wearable chemical sensors were showcased, highlighting excellent mechanical stability and reliable response.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Chemistry, Physical
Qichao Dong, Zengyong Chu, Xiaofeng Gong, Min Xiao, Gouchen Li, Zhenkai Zhao, Ye Zhang, Jiayu Dai, Tianjiao Hu, Zhenhua Jiang
Summary: In this study, a novel combustion approach was proposed to construct three-dimensional reduced graphene oxide (RGO) foam for high-performance gas sensing. The RGO foam exhibited a unique porous structure and demonstrated high sensitivity for the trace and fast detection of nitrogen dioxide (NO2).
Article
Chemistry, Analytical
Xinwei Chen, Tao Wang, Yutong Han, Wen Lv, Bolong Li, Chen Su, Min Zeng, Jianhua Yang, Nantao Hu, Yanjie Su, Zhi Yang
Summary: This study presents a convenient watch-type wearable NO2 sensor with low power consumption and stable mechanical durability, allowing for real-time monitoring and early warning of toxic gases through wireless bluetooth transmission. The impressive sensing performance of ZnS NPs/N-rGO is attributed to geometrical and electronic effects, which is significant for the future development of low-power, high-performance sensing equipment.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Materials Science, Multidisciplinary
Hyunjun Park, Woong Kim, Sang Won Lee, Joohyung Park, Gyudo Lee, Dae Sung Yoon, Wonseok Lee, Jinsung Park
Summary: A flexible and disposable paper-based NO2 sensor based on a reduced graphene oxide/chitosan (rGO/CS) composite is proposed in this study. By analyzing the conductive change of the composite, nitrogen dioxide can be detected in a concentration range of 0-100 ppm, demonstrating its practical application potential.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Neetika, Arvind Kumar, Ramesh Chandra, V. K. Malik
Summary: MoS2 thin films of different thicknesses were deposited using direct current magnetron sputtering and utilized as gas sensors without additional processing. The change in morphology from nanoparticle to nanoworm structures in MoS2 thin films resulted in an increased NO2 sensing response, demonstrating the potential application of MoS2 nanostructures for a highly sensitive gas sensor.
Article
Chemistry, Multidisciplinary
Wei Li, Mahboobeh Shahbazi, Kaijian Xing, Tuquabo Tesfamichael, Nunzio Motta, Dong-Chen Qi
Summary: In this work, 2D MoS2@MoO3 heterostructures were synthesized and their morphological, structural, and compositional properties were studied. The heterostructures showed room-temperature ferromagnetism and exhibited p-type-like response towards NO2, with excellent selectivity and reversibility. This study demonstrates the promising application of 2D molybdenum hybrid compounds in gas sensing with unique electronic and magnetic properties.
Article
Chemistry, Multidisciplinary
Baishali Mahanta, Hasan Al Mamun, Rana Sanjay Kumar Singh, Lakhya Jyoti Borthakur
Summary: A MoS2/SG/Cu nanocomposite was prepared and used as a sensor electrode for the simultaneous electrochemical sensing of DA and 5-HT in urine samples with high stability and sensitivity.
NEW JOURNAL OF CHEMISTRY
(2023)
Article
Chemistry, Physical
Namsoo Lim, Hyeonghun Kim, Yusin Pak, Young Tae Byun
Summary: This paper demonstrates the enhanced NO2 sensing performance of graphene with defects generated by rapid thermal annealing (RTA). The density of defects proportionally increased with increasing the RTA temperature. However, excessive defects formed at temperatures above 500 degrees Celsius may damage electrical paths and deteriorate NO2 response.
Article
Chemistry, Multidisciplinary
Eunji Choi, Sung Jun Hong, Yong-Jae Kim, Seung Eun Choi, Yunkyu Choi, Ji Hoon Kim, Junhyeok Kang, Ohchan Kwon, Kiwon Eum, Byungchan Han, Dae Woo Kim
Summary: The study achieved ultrafast H-2 permeance and enhanced hydrogen selectivity by growing a pore-tuned zeolitic imidazolate framework (ZIF)-8 layer directly on a graphene oxide nanoribbons (GONR)-treated polymer substrate.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Takashi Ikuta, Takashi Tamaki, Hiroshi Masai, Ryudai Nakanishi, Kitaro Endo, Jun Terao, Kenzo Maehashi
Summary: Metalloporphyrin-modified graphene field-effect transistors (FETs) were fabricated for trace detection of NO2, with Mg-porphyrin modification showing significant response compared to other porphyrins. This study demonstrates the potential for rapid, easy, and selective detectability of NO2 using Mg-porphyrin-modified graphene FETs.
NANOSCALE ADVANCES
(2021)
Article
Chemistry, Analytical
Katarzyna Drozdowska, Sergey Rumyantsev, Janusz Smulko, Andrzej Kwiatkowski, Pavlo Sai, Pawel Prystrawko, Aleksandra Krajewska, Grzegorz Cywinski
Summary: This study investigates the detection of nitrogen dioxide, tetrahydrofuran, and acetone using a graphene/AlGaN/GaN sensing device with a two-dimensional electron gas (2DEG) under UV light irradiation. The combination of DC characteristics and fluctuation-enhanced sensing method reveals the impact of UV irradiation on the GaN-based field-effect transistor (FET), resulting in improved gas detection and the ability to differentiate between inorganic and weakly adsorbing organic species. Time-domain experiments confirm the stability and reversibility of sensor responses, as well as reduced time drift after UV light exposure. The observed features in the 1/f noise spectra suggest the influence of irradiation on trapping states in the GaN-based heterostructure, which modulate the fluctuations of channel carriers in the device. These findings broaden the applications of AlGaN/GaN heterostructures modulated with a graphene gate for gas sensing purposes.
SENSORS AND ACTUATORS B-CHEMICAL
(2023)
Article
Chemistry, Multidisciplinary
Ceren Karaman, Onur Karaman, Bahar Bankoglu Yola, Izzet Ulker, Necip Atar, Mehmet Lutfi Yola
Summary: In this study, a novel electrochemical AFB1 immunosensor was developed based on Ag nanocubes (AgNCs) and trigonal metallic MoS2 nanosheets with 1T phase (AgNCs/1T-MoS2) as the signal amplification and gold nanoparticles/porous graphene nanoribbon (AuNPs/PGNR) as the electrochemical sensor platform. The immunosensor exhibited good sensitivity with a low detection limit of 2.00 fg mL(-1). Physicochemical characterization techniques such as SEM, TEM, XPS, and XRD were used to describe the surface morphology and elemental composition of the immunosensor, while CV, DPV, and EIS techniques were used for evaluating its electrochemical performance.
NEW JOURNAL OF CHEMISTRY
(2021)
Article
Chemistry, Multidisciplinary
Zengyong Chu, Min Xiao, Qichao Dong, Guochen Li, Tianjiao Hu, Ye Zhang, Zhenhua Jiang
Summary: In this study, an efficient method was proposed to prepare ultrasensitive gas sensors based on porous reduced graphene oxide (PRGO) through photo-Fenton etching. The controlled etching enriched the vacancy defects of GO nanosheets and formed porous graphene oxide (PGO). The PGO was drop-coated on interdigital electrodes and hydrothermal reduced to achieve controllable reduction by varying the water amount. The gas sensor based on PRGO-5 min-6 h exhibited superior sensing and selective performance toward nitrogen dioxide (NO2), with an exceptional high sensitivity up to 12 ppm(-1) and a theoretical limit of detection down to 0.66 ppb. The excellent performance could be mainly attributed to the typical vacancy defects of PRGO, and the residue carboxylic groups on the edges facilitated the adsorption of polar molecules. The proposed process has great potential for scalable fabrication of high-performance NO2 gas sensors.
CHINESE CHEMICAL LETTERS
(2023)