Article
Chemistry, Physical
Lizhai Zhang, Jinniu Zhang, Yuhong Huang, Huiyan Xu, Xiaolin Zhang, Hongbing Lu, Kewei Xu, Paul K. Chu, Fei Ma
Summary: Metal oxides with high-energy facets, such as ZnO nanoparticles with exposed {0001} polar surface, show better gas sensing properties, particularly to NO2 at room temperature. The metallic characteristics of ZnO {0001} surface promote charge transfer and enhance NO2 detection sensitivity.
APPLIED SURFACE SCIENCE
(2021)
Article
Nanoscience & Nanotechnology
Cecilia A. Zito, Tarciïsio M. Perfecto, Diogo P. Volanti
Summary: This study investigates the effect of reduced graphene oxide (RGO) on the sensing performance of CeO2 nanospheres for triethylamine (TEA) detection at room temperature and humidity conditions. The RGO/CeO2 nanocomposite exhibits higher sensitivity and selectivity to TEA, as well as a lower theoretical detection limit of 1 ppm at 70% RH, compared to the bare CeO2-based sensor. The study also highlights the positive role of humidity in TEA detection. These findings provide a promising strategy for developing sensitive TEA sensors with practical applications.
ACS APPLIED NANO MATERIALS
(2023)
Article
Chemistry, Physical
Wei Li, Tingting Wang, Dongdong Huang, Chan Zheng, Yuekun Lai, Xueqing Xiao, Shuguang Cai, Wenzhe Chen
Summary: The hierarchical microstructure of hexagonal WO3·0.33H2O prepared by the hydrothermal method showed larger specific surface area and narrower bandgap compared to isolated nanorods. The enhanced photocatalytic activity of the hierarchical microstructure can be attributed to its unique structure, making it suitable for various applications.
Article
Materials Science, Multidisciplinary
M. Ferdi Fellah
Summary: The study revealed that the reduced graphene oxide/(WO3)(3) structure can function as a sensor for NO2 gas, showing high potential for room-temperature detection.
DIAMOND AND RELATED MATERIALS
(2021)
Article
Chemistry, Analytical
Ammar Al-Hamry, Tianqi Lu, Jing Bai, Anurag Adiraju, Tharun K. Ega, L. G. Paterno, Igor A. Pasti, Olfa Kanoun
Summary: This paper investigates the use of HCl-doped polyaniline/reduced graphene oxide (PANI/rGO) for resistive and electrochemical sensing applications. The sensors show excellent performance in temperature, humidity, acetone, and organophosphate detection. The PANI/rGO sensors feature rapid production, low cost, and versatile sensing capabilities, making them highly feasible for various applications.
SENSORS AND ACTUATORS B-CHEMICAL
(2023)
Article
Chemistry, Physical
Jiarui Huang, Chunyu Meng, Hui Wang, Haibo Ren, Xiaojing Lu, Sang Woo Joo
Summary: In this study, cross-linked porous tin dioxide nanosheets were successfully synthesized using three-dimensional reduced graphene oxide as a template. The resulting nanosheets exhibited high sensitivity to toxic organic vapors, making them promising candidates for practical detectors of volatile organic compounds.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Energy & Fuels
Prateek Bhojane, Parasharam M. Shirage
Summary: The study focused on the synthesis, growth mechanism, and pseudocapacitive properties of 1D hexagonal phase-WO3 nanopillars and h-WO3/rGO nanocomposite. The nanocomposite exhibited a hexagonal structure and 3D networks, with excellent specific capacitance values and high stability demonstrated in electrochemical characterizations. Proton insertion was identified as a rare capacitive charge storage mechanism in metal oxides, significantly enhancing capacitance.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Chemistry, Physical
Fangjie Qin, Jun Gao, Lin Jiang, Jiahui Fan, Baihe Sun, Yihe Fan, He Lv, Keying Shi
Summary: The WO3@WS2 heterojunction composites with bio-morphology were synthesized using hemp sticks derived from porous carbon as bio-templates. The 3D hierarchical structure and the S-termination of WS2, as well as the S-W-O of the heterojunction interface, collectively enhanced the gas sensing performance of WO3@WS2/BC. The composite sensor exhibited remarkable selectivity to NO2 and a super-fast response/recovery time, showing potential for highly sensitive NO2 detection at room temperature.
APPLIED SURFACE SCIENCE
(2023)
Article
Nanoscience & Nanotechnology
Anupam Ruturaj Tripathy, Ching Chang, Shivam Gupta, Aswin Kumar Anbalagan, Chih-Hao Lee, Sheng-Shian Li, Nyan-Hwa Tai
Summary: In this study, a PEI/NrGO/ZNR sensor for CO2 sensing was developed, and it showed excellent sensing performance and stability at room temperature.
ACS APPLIED NANO MATERIALS
(2022)
Article
Chemistry, Physical
Istvan Szekely, Endre-Zsolt Kedves, Zsolt Pap, Monica Baia
Summary: This study provides meaningful insights into the synthesis design of WO3 materials by systematically altering precursors and shaping agents. The presence of W+5 centers was confirmed, with W+5 and W+6 species affecting the band gap values and photoactivity of the composites. The electronegativity of the halide anions has both favorable and unfavorable effects on the photoactivity of the composites.
Article
Chemistry, Physical
Ming Hou, Jiyun Gao, Li Yang, Shenghui Guo, Tu Hu, Yongxiang Li
Summary: In this study, two-dimensional layered-structured Ti3C2Tx MXene and TiO2-C/g-C3N4 (TC-CN) composites were prepared and investigated for their gas sensing performances towards volatile organic compounds gases under UV light. The results showed that TC-CN exhibited excellent response values towards gases such as ethanol under UV light irradiation.
APPLIED SURFACE SCIENCE
(2021)
Article
Nanoscience & Nanotechnology
Xiaoli Xu, Shengyi Wang, Yan Chen, Wangwang Liu, Xiaoping Wang, Hongtao Jiang, Shuyi Ma, Pengdou Yun
Summary: All-inorganic halide perovskites, especially pure CsPbBr3 and heterogeneous CsPbBr3@MoS2 composites, have shown great potential in gas sensing, with the CsPbBr3 sensor being able to effectively detect ethanolamine with high sensitivity and stability.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Materials Science, Multidisciplinary
Tingting Li, Pengfei Zhou, Sikai Zhao, Cong Han, Dezhou Wei, Yanbai Shen, Tao Liu
Summary: WO3•0.33H2O microshuttles self-assembled by nanorods showed improved gas sensing properties with Pt doping, exhibiting enhanced sensor response and NH3 selectivity compared to pure WMSs. The Pt-doped WMSs, especially with 1.0 mol% Pt, demonstrated superior performance in detecting NH3 gas at various concentrations and temperatures, indicating their potential for gas detection applications.
Article
Nanoscience & Nanotechnology
Muthu Mariappan Sivalingam, Jimena A. Olmos-Asar, Elangovan Vinoth, Thangeeswari Tharmar, Mohd Shkir, Zafar Said, Karthikeyan Balasubramanian
Summary: The study investigates the NH3 sensing performance of CuO:rGO composites prepared using different chemical routes, revealing that the improved sensor response of hydrothermally synthesized CuO:rGO is primarily attributed to the higher concentration of active sites induced on the CuO nanorod surface by rGO.This enhanced response is also facilitated by the favorable band bending at the rGO-CuO interface.
ACS APPLIED NANO MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Mohammad Mahdi Kiaee, Thomas Maeder, Juergen Brugger
Summary: The study introduces chemiresistive sensors made of a thermoplastic elastomer and high-structure carbon black for detecting hydrocarbons at or near room-temperature. These sensors demonstrate fast response and recovery to nonpolar compounds, showing potential for low-cost, low-power consumption applications.
ADVANCED MATERIALS TECHNOLOGIES
(2021)
Article
Chemistry, Analytical
Bruna S. Sa, Cecilia A. Zito, Tarcisio M. Perfecto, Diogo P. Volanti
Summary: This study successfully synthesized highly sensitive and selective NC-ZnSnO3 for TEA detection, demonstrating excellent response properties for various VOCs and a low detection limit for TEA.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Materials Science, Multidisciplinary
Giovana M. Galvani, Cecilia A. Zito, Tarcisio M. Perfecto, Joao Otavio D. Malafatti, Elaine C. Paris, Diogo P. Volanti
Summary: In this study, NiO nanosheets with excellent adsorption performance were successfully synthesized by adjusting the synthesis parameters. The nanosheets showed a high adsorption capacity for Congo red dye, with the best performance achieved at a calcination temperature of 300℃.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Materials Science, Multidisciplinary
Olavo M. Perrone, Antonio C. Roveda Jr, Daniel A. de Moraes, Reinaldo dos Santos Theodoro, Diogo P. Volanti
Summary: This article introduces a high surface area sensor based on SnO2 nanoparticles deposited on NiO nanocuboids, which shows high response to ethanol. Through a specific synthesis process, a portable device with low cost and low detection limits, good selectivity and easy and fast synthesis for ethanol detection is developed. After 20 cycles of operation, the developed material shows a response to ethanol with R-air/R-gas = 84 +/- 6 at 350 degrees C, and it performs better at lower temperatures compared to other materials.
MATERIALS RESEARCH BULLETIN
(2023)
Article
Multidisciplinary Sciences
Lukas Grote, Martin Seyrich, Ralph Dohrmann, Sani Y. Harouna-Mayer, Federica Mancini, Emilis Kaziukenas, Irene Fernandez-Cuesta, Cecilia A. Zito, Olga Vasylieva, Felix Wittwer, Michal Odstrczil, Natnael Mogos, Mirko Landmann, Christian G. Schroer, Dorota Koziej
Summary: Understanding morphological changes of nanoparticles in solution is crucial for tailoring the functionality of energy devices. However, there is a lack of experimental methods that can visualize these processes in solution and provide three-dimensional information. This study demonstrates the use of X-ray ptychography for in situ 3D imaging of the formation and hollowing of nanoparticles in solution at high temperature.
NATURE COMMUNICATIONS
(2022)
Article
Chemistry, Physical
Olavo M. Perrone, Antonio C. Roveda Jr, Daniel A. de Moraes, Diogo P. Volanti
Summary: Monitoring VOCs is crucial for human health, and semiconductor gas sensors are a promising strategy for detection. This study synthesized NiO/In2O3 heterostructure using innovative methods and investigated its performance as a gas sensor for detecting VOCs. NiO/In2O3 showed superior selectivity, stability, and sensitivity in detecting n-butanol due to the p-n heterojunction and increased adsorption sites.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Gabriel C. N. Vioto, Tarcisio M. Perfecto, Cecilia A. Zito, Diogo P. Volanti
Summary: We report the VOC sensing performance of porous flower-like NiO to 3-methyl-1-butanol (3M1B), a microbial VOC that can be used as a food spoilage marker. The NiO-based sensor showed high sensitivity and selectivity to 3M1B compared to other VOCs, and exhibited fast response times under humidity conditions. NiO is a promising material for real applications.
Article
Nanoscience & Nanotechnology
Cecilia A. Zito, Tarciïsio M. Perfecto, Diogo P. Volanti
Summary: This study investigates the effect of reduced graphene oxide (RGO) on the sensing performance of CeO2 nanospheres for triethylamine (TEA) detection at room temperature and humidity conditions. The RGO/CeO2 nanocomposite exhibits higher sensitivity and selectivity to TEA, as well as a lower theoretical detection limit of 1 ppm at 70% RH, compared to the bare CeO2-based sensor. The study also highlights the positive role of humidity in TEA detection. These findings provide a promising strategy for developing sensitive TEA sensors with practical applications.
ACS APPLIED NANO MATERIALS
(2023)
Article
Materials Science, Biomaterials
Bianca Gottardo, Andreza R. M. Zoccal, Taiza Maschio-Lima, Thiago H. Lemes, Mario H. Paziani, Marcia R. Von Zeska Kress, Tarcisio M. Perfecto, Margarete T. G. Almeida, Diogo P. Volanti
Summary: This study evaluates the fungicidal activity of nanocomposites based on reduced graphene oxide loaded with silver nanoparticles against dermatophytes and Candida species. The results show that the composite has a good inhibitory effect on various fungi and has no toxic effects on the experimental model.
ACS BIOMATERIALS SCIENCE & ENGINEERING
(2023)
Article
Engineering, Electrical & Electronic
Reinaldo S. Theodoro, Bruna S. Sa, Olavo M. Perrone, Tarcisio M. Perfecto, Diogo P. Volanti
Summary: Industrialization poses significant challenges to human well-being due to the emission of toxic VOCs. Therefore, it is crucial to develop VOC sensing devices that are highly selective and reproducible. Semiconductor metal oxides, which can withstand relative humidity variations, offer a potential solution for producing inexpensive sensors with reasonable detection limits and selectivity.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Biotechnology & Applied Microbiology
Tais N. T. Oliveira, Tarcisio M. Perfecto, Cecilia A. Zito, Diogo P. Volanti
Summary: The study investigated the impact of In2O3 nanoparticles on the VOC-sensing performance of ZnO twin-rods, with results showing that the In2O3/ZnO heterostructure exhibited higher selectivity and sensitivity towards TEA.
SENSORS AND ACTUATORS REPORTS
(2021)