Article
Engineering, Electrical & Electronic
Wenbo Qin, Renze Zhang, Zhenyu Yuan, Chaoyang Xing, Fanli Meng
Summary: In this study, LaFeO3/Fe2O3 composites were synthesized by a hydrothermal method for the detection of acetone gas. The composite material showed superior gas sensing properties compared to pure LaFeO3, with a response almost five times higher. It also exhibited a low limit of detection, good long-term stability, and selectivity.
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
(2022)
Article
Materials Science, Ceramics
Shipra Choudhary, Aditi Bisht, Satyabrata Mohapatra
Summary: This study reports the use of magnetically separable alpha-Fe2O3/ZnFe2O4/ZnO ternary hybrid nanodiscs for solar-driven highly efficient photocatalytic decomposition of toxic organic contaminants. The hybrid nanostructures showed excellent photocatalytic performance under solar light illumination, efficiently decomposing organic dyes and demonstrating reusability and easy magnetic separation. In-situ scavenger studies identified center dot OH radicals as the main active radicals in the photocatalysis process.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Inorganic & Nuclear
Mehdi Shoorangiz, Leila Shariatifard, Hossein Roshan, Ali Mirzaei
Summary: In this study, p-type alpha-Fe2O3 nanoparticles were synthesized and used for gas sensing studies. The gas sensor showed a p-type semiconducting behavior and good selectivity towards ethanol vapor at an optimized sensing temperature of 150 degrees C, with a response of 14.5% to 100 ppm ethanol gas. The sensing mechanism was discussed in details.
INORGANIC CHEMISTRY COMMUNICATIONS
(2021)
Article
Materials Science, Multidisciplinary
Yanwei Li, Xueling Wang, Guang Sun, Jianliang Cao, Yan Wang
Summary: Constructing n-n or p-n heterojunctions in nanostructured metal oxide semiconductor (MOS) is an efficient strategy for developing high-performance MOS-based gas sensors. In this study, an n-n and α-Fe2O3-Bi2WO6 heterojunction strategy was used to enhance the gas sensitivity of α-Fe2O3 towards n-butanol. By preparing a discoid nanostructure (DNS) of α-Fe2O3 and modifying it with evenly distributed Bi2WO6 nanoparticles, the resulting Bi2WO6@α-Fe2O3 DNSs showed improved sensing performance for n-butanol compared to bare α-Fe2O3, including higher sensitivity, better selectivity, and faster response speed.
Article
Materials Science, Multidisciplinary
Shipra Choudhary, Aditi Bisht, Manisha Sharma, Venkata Krishnan, Satyabrata Mohapatra
Summary: Novel magnetically recyclable alpha-Fe2O3/CoFe2O4/Co3O4 ternary nanohybrids were successfully fabricated and exhibited excellent magnetic separability and enhanced photocatalytic efficiency for the decomposition of dyes.
Article
Chemistry, Analytical
Amit Kumar Shringi, Amit Kumar, Maloy Das, Sang Sub Kim, Hyoun Woo Kim, Mahesh Kumar
Summary: Novel metal functionalization of semiconductor metal oxide surfaces can effectively improve the selectivity and sensitivity of gas sensors. In this study, the functionalization of α-Fe2O3 sensor with silver nanoparticles enhanced its sensing performance for NO2 molecules, resulting in a higher relative response rate.
SENSORS AND ACTUATORS B-CHEMICAL
(2023)
Article
Chemistry, Physical
P. P. Ortega, C. C. Silva, M. A. Ramirez, G. Biasotto, C. R. Foschini, A. Z. Simoes
Summary: ZnO nanostructures synthesized via the microwave-assisted hydrothermal method show superior photocatalytic and gas sensing performances, highlighting their potential for environmental applications such as water purification and air monitoring.
APPLIED SURFACE SCIENCE
(2021)
Article
Materials Science, Multidisciplinary
Fei Li, Qian Lv, Lun Gao, Xing Zhong, Jing Zhou, Xiaoxin Gao
Summary: Ag-LaFeO3, prepared by chemical reduction method, demonstrates excellent gas-sensing properties towards ethanol, with a higher gas response compared to LaFeO3 sensor, and short response and recovery times.
JOURNAL OF MATERIALS SCIENCE
(2021)
Article
Chemistry, Analytical
Chen Su, Lu Zhang, Yutong Han, Cong Ren, Bolong Li, Tao Wang, Min Zeng, Yanjiu Su, Nantao Hu, Zhihua Zhou, Ying Wang, Zhi Yang, Lin Xu
Summary: A novel flower-like hierarchical NiO-ZnO heterostructure was synthesized using a one-step hydrothermal method with the assistance of glucose and further calcination treatment. Gas sensors based on this heterojunction showed excellent response and stability for glycol detection at relatively low operating temperature. This work demonstrates a great potential for efficient glycol gas detection by directly synthesizing G-NiO-ZnO heterojunction in a one-step approach.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Chemistry, Analytical
Chethana Aranthady, Teena Jangid, Kapil Gupta, Abhishek Kumar Mishra, S. D. Kaushik, V Siruguri, G. Mohan Rao, Ganapati Shanbhag, Nalini G. Sundaram
Summary: A comparative study was conducted on La1-xCaxFeO3 and La0.6Ca0.4FeO3 materials, showing that La0.6Ca0.4FeO3 thin films exhibit better sensitivity and performance for low concentration SO2 gas. High-resolution transmission electron microscope images and X-ray photoelectron spectroscopy analysis confirmed the nanoparticle nature of La1-xCaxFeO3 samples and the presence of oxygen vacancies.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Chemistry, Analytical
Siddharth Choudhary, S. Annapoorni, Rakesh Malik
Summary: Donut-shaped hematite nanoparticles were successfully synthesized using a facile chemical method for high performance LPG gas sensor development. By controlling the annealing temperature, the morphology of nanoparticles could be regulated, leading to improved sensor response.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Biochemistry & Molecular Biology
Chenzhi Zhang, Dashuang Wang, Lichao Dong, Kailin Li, Yifan Zhang, Pingan Yang, Shuang Yi, Xingjian Dai, Changqing Yin, Zhilan Du, Xinfang Zhang, Quan Zhou, Zhiyu Yi, Jinsong Rao, Yuxin Zhang
Summary: A neoteric composite material of round sieve diatomite decorated with sea-urchin-like alpha-iron trioxide was prepared and studied for its electromagnetic parameters and absorbing properties.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Review
Materials Science, Multidisciplinary
Ying Li, Yu-Ling Lu, Kai-Di Wu, Dong-Zhi Zhang, Marc Debliquy, Chao Zhang
Summary: Hydrothermal methods are efficient for synthesizing products with specific morphology and nanostructure, and the assistance of microwaves can accelerate reactions and improve physicochemical properties, impacting gas-sensing performance. CuO is widely used in semiconductor gas sensors. Technical challenges and prospective solutions for high-performance CuO-based materials are discussed, and hierarchical CuO-based nanostructures prepared by MWHS process are proposed as efficacious methods for enhancing gas-sensing performance.
Article
Materials Science, Multidisciplinary
Wen Ge, Xiaohui Zhang, Xiutao Ge, Kong Liu
Summary: The gas-sensing nanocomposite of α-Fe2O3/20%SiO2, synthesized by sol-gel method, showed a high response to high concentration acetone with fast response/recovery time, demonstrating its potential for sensitive and selective detection of acetone.
MATERIALS RESEARCH BULLETIN
(2021)
Article
Environmental Sciences
R. Ramprasath, L. Arul Pragasan, V. Manikandan, S. Sudha, S. Cholan, Abdullah A. Alarfaj, Abdurahman Hajinur Hirad, B. Gokul, Sridhar Sampath
Summary: Vanadium-doped alpha-Fe2O3 nanoparticles were prepared through polyol-assisted hydrothermal method and the impact on their structure, optical, magnetic, and photocatalytic properties were studied. The results show that 5% V-doped alpha-Fe2O3 nanoparticles exhibit superior photocatalytic activity.