Article
Chemistry, Analytical
Ruonan Tian, Zeyuan Gao, Gang Chen, Hongtao Guan, Chengjun Dong, Elisabetta Comini
Summary: In this study, a sol-gel method followed by a thermal treatment was used to control the phases formation of mesoporous iron oxide. It was found that mixed alpha/gamma-Fe2O3 phases showed enhanced sensing performances towards acetone. Additionally, coupling alpha/gamma-Fe2O3 with 2D materials of MXene prevented agglomeration of Fe2O3 nano-particles and increased the number of active sites for chemical absorption. Furthermore, the p-n heterojunctions resulted in an enhanced response towards acetone.
SENSORS AND ACTUATORS B-CHEMICAL
(2023)
Article
Materials Science, Multidisciplinary
Yun Wang, Hongjie Tan, Lexian Sang, Yunying Xie, Fuchao Jia, Tong Zhou, Guangchao Yin, Fazhe Sun, Xiaomei Wang
Summary: An optimized acetone gas sensor based on Ti3C2/alpha-Fe2O3 (TF) composite materials was synthesized using microwave and etching methods. The TF composites exhibited improved gas-sensitive performance to acetone due to the increased specific surface area and surface defects, as well as the excellent electrical conductivity and high free charges transfer ability of Ti3C2 MXene. The response of TF gas sensor to 100 ppm acetone was significantly higher than pure alpha-Fe2O3 gas sensor, with a lower detection limit of 1 ppm. The TF gas sensor also demonstrated excellent selectivity, long-term repeatability, and stability for acetone.
JOURNAL OF MATERIALS SCIENCE
(2023)
Article
Chemistry, Analytical
Qian Xia, Cuiping Gu, Xingxing Xie, Haibo Ren, Sang Woo Joo, Jiarui Huang
Summary: In this study, Sn-doped Fe2O3 microflowers were synthesized and used as sensing materials for acetone sensors. The microflowers exhibited good selectivity, high sensitivity, and stability for acetone vapor detection, with enhanced adsorption of acetone molecules.
SENSORS AND ACTUATORS B-CHEMICAL
(2024)
Article
Materials Science, Ceramics
Miao Liu, Peng Song, Zhongxi Yang, Qi Wang
Summary: In this study, a novel SnO2 nanorod/spindle-like Fe2O3 heterostructure was successfully fabricated through a simple two-step hydrothermal route, which showed improved gas sensing performance on volatile organic compounds compared to pure Fe2O3. The enhanced gas-sensitivity performance of the hierarchical SnO2/Fe2O3 heterostructures can be attributed to the synergistic effect and heterojunction of the interface between spindle-like Fe2O3 and SnO2 nanorod. This research may provide new insight and a rational strategy for upgrading the sensing performance of certain semiconductor metal oxide materials through the design of novel layered nanostructures in the future.
CERAMICS INTERNATIONAL
(2021)
Article
Nanoscience & Nanotechnology
Xinwang Zhai, Zhaofeng Wu, Qihua Sun, Jun Sun, Rabigul Tursun, Min Zhang, Haiming Duan, Dongzhi Zhang
Summary: Inspired by natural structures, researchers used bacterial cellulose nanofibers as raw materials to design acetone gas sensors. By introducing Fe2O3 nanorods onto the surface of carbon nanofibers through a hydrothermal catalytic carbonization, a heterojunction structure was created, resulting in a composite material with high gas-sensing properties for acetone vapor.
ACS APPLIED NANO MATERIALS
(2023)
Article
Engineering, Electrical & Electronic
Haoyue Yang, Qian Lei, Zhenting Zhao, Yongjiao Sun, Pengwei Li, Serge Zhuiykov, Jie Hu
Summary: Different concentrations of palladium nanoparticles modified hematite nanofibers were successfully synthesized, showing significantly improved sensing performances for gases like acetone.
IEEE SENSORS JOURNAL
(2021)
Article
Chemistry, Analytical
Miao Liu, Zeyu Wang, Peng Song, Zhongxi Yang, Qi Wang
Summary: In this study, a high-performance room temperature gas-sensing material was successfully developed by utilizing MXene and reduced graphene oxide as building blocks. The resulting 3D aerogel shows excellent acetone-sensing performance at room temperature, with fast response and recovery times, as well as good reproducibility and selectivity. This strategy of composite 3D graphene/MXene architectures with metal oxide semiconductors provides a new pathway for future development of room temperature gas sensors.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Materials Science, Multidisciplinary
Jiancheng Liu, Fuchao Jia, Yu Yang, Lexian Sang, Tingting Liu, Xiaomei Wang, Huijuan Niu, Bo Liu
Summary: In this study, in-situ ordered ZnO nanorod arrays (ZnONRs) sensitized by boron nitride quantum dots (BNQDs) were synthesized on the ceramic tube via a simple hydrothermal method. XRD, SEM, TEM, and XPS techniques were employed to characterize the crystalline phase, detailed morphologies, and chemical bond states of the samples. The gas-sensing properties of the sensor for acetone were systematically investigated. The results demonstrated that ZnONRs compounded with BNQDs (BN-ZnONRs) were 1.7 times more responsive to acetone than the pristine ZnONRs, the sensors possessed rapid response/recovery times and outstanding stability. The enhanced sensing performances of BN-ZnONRs can be ascribed to the sensitization effect of BNQDs, which resulted in the adsorption of additional oxygen-active species on the material surface and an effective reduction in the reaction's activation energy.
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
Chemistry, Inorganic & Nuclear
Shuai Zhang, Peng Song, Min Liu, Yukun Zheng, Qi Wang
Summary: The In-doped Fe2O3 spindles prepared in this study showed efficient detection of acetone gas due to the increased surface area and more active sites. The gas sensor exhibited fast response-recovery and excellent selectivity for acetone gas.
INORGANIC CHEMISTRY COMMUNICATIONS
(2022)
Article
Materials Science, Multidisciplinary
Zeyuan Gao, Ruonan Tian, Chaowei Jia, Ruifeng Lang, Gang Chen, Hongtao Guan, Chengjun Dong
Summary: In this study, 1D mesoporous NiFe2O4 nanorods were successfully synthesized via hydrothermal method, and Pt nanoparticles were functionalized to enhance the sensitivity and reliability of acetone detection.
MATERIALS CHEMISTRY AND PHYSICS
(2024)
Article
Chemistry, Analytical
Seungpil Oh, Joon-Shik Park, Hoo-Jeong Lee, Hyung Mo Jeong
Summary: In this work, Cu-2(OH)(3)F/CuO hierarchical structures were synthesized and pre-annealed to improve the gas-sensing capability for acetone. The 250°C annealed samples showed the highest response to low concentrations of acetone gas. Characterization techniques were used to analyze the mechanism of pre-annealing of Cu-2(OH)(3)F.
SENSORS AND ACTUATORS B-CHEMICAL
(2022)
Article
Chemistry, Multidisciplinary
Ruixue Mo, Dongqiang Han, Zeng Ren, Dazhuang Yang, Fei Wang, Caolong Li
Summary: Hollow Fe2O3/Co3O4 microcubes were successfully synthesized using a hydrothermal method and annealing process, showing enhanced sensing performances towards acetone. The enhanced gas sensing performances can be attributed to the high surface area of the hollow structure and the p-n heterojunctions within the microcubes.
CHINESE CHEMICAL LETTERS
(2021)
Article
Chemistry, Multidisciplinary
Ruonan Tian, Zeyuan Gao, Ruifeng Lang, Na Li, Huilin Gu, Gang Chen, Hongtao Guan, Elisabetta Comini, Chengjun Dong
Summary: This study presented a novel synthesis method of iron-glycerate and explored the effects of different thermal treatments on its properties. It was found that the dual phases of alpha/gamma-Fe2O3 exhibited better sensing performance for acetone detection. Additionally, the sensor performance was further improved by doping with nickel and functionalizing with ruthenium nanoparticles.
JOURNAL OF NANOSTRUCTURE IN CHEMISTRY
(2023)
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)
Review
Materials Science, Multidisciplinary
Yong Ding, In Seok Yang, Zhaoqian Li, Xin Xia, Wan In Lee, Songyuan Dai, Detlef W. Bahnemann, Jia Hong Pan
PROGRESS IN MATERIALS SCIENCE
(2020)
Article
Materials Science, Multidisciplinary
Soong Keun Hyun, Bumhee Nam, Tae Kyung Ko, Chongmu Lee, Seung Bok Choi, Wan In Lee
PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE
(2020)
Article
Environmental Sciences
Kwangsun Yu, Imteaz Ahmed, Dong-Il Won, Wan In Lee, Wha-Seung Ahn
Article
Chemistry, Multidisciplinary
Ting Zhao, Ruifeng Qian, Yang Tang, Jing Yang, Yitao Dai, Wan In Lee, Jia Hong Pan
Article
Environmental Sciences
Ting Zhao, Ruifeng Qian, Guanda Zhou, Yu Wang, Wan In Lee, Jia Hong Pan
Summary: The strategic integration of membrane water filtration with semiconductor photocatalysis provides deep purification with self-cleaning capability. Mesoporous WO3/TiO2 spheres show superior photocatalytic activity and high flux, making them promising for concurrent membrane filtration and solar photocatalysis.
Article
Environmental Sciences
Hye Jin Kang, Dong Ii Won, Yeongsu Lim, Jeongho Kim, Wan In Lee
Summary: The study found that Pt deposition greatly enhances the photocatalytic activity of ATO/TiO2, while Au or Ag depositions have less significant effects. Spectroscopic analysis indicated that Pt is most effective in scavenging electrons from the ATO CB. Pt/ATO/TiO2 produced significantly more CO2 than other catalysts, suggesting that Pt deposition can suppress charge recombination pathways effectively.
Article
Nanoscience & Nanotechnology
Sarnai Puntsagdorj, Agni Raj Koirala, Jargalsaikhan Gombovanjil, Nguyen Nguyen Khanh, Sang Do Sung, Wan In Lee, Kyung Byung Yoon
Summary: A facile stamping method was used to assemble ordered arrays of mesoporous WO3 micropillars, resulting in the preparation of a series of WO3 heterostructural bilayer photoanodes. The 2.5/7.5 photoanode displayed a higher photocurrent density compared to a plain WO3 sheet, due to increased charge carrier density and other beneficial factors.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Nanoscience & Nanotechnology
Hyeon-Seo Choi, Yu-Na Kim, Seungyeon Hong, Bowen Yang, Jiajia Suo, Ji-Youn Seo, Seok Joon Kwon, Anders Hagfeldt, Hyo Jung Kim, Wan In Lee, Hui-Seon Kim
Summary: Surface passivation using a mixed salt has been shown to improve the performance and stability of perovskite solar cells. The length of the alkyl chain in the mixed salt can manipulate the crystal formation dynamics and enhance the (001) plane. The enhanced crystal orientation during surface recrystallization reduces trap density and suppresses charge recombination, leading to an increase in open-circuit voltage and fill factor.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Nanoscience & Nanotechnology
So-Yeon Ju, Wan In Lee, Hui-Seon Kim
Summary: This study introduces the strategy of strain control into perovskite solar cells, showing that applying compressive strain can improve the long-term photovoltaic performance. The compressive strain-induced perovskite film exhibits relatively constant absorbance spectra, while the film without strain control gradually decays and develops an Urbach tail. Furthermore, the device without strain control displays unreliable and overestimated fill factor and conversion efficiency after long-term storage, whereas the compressive strain-induced device shows a stable performance with a 16% increase in fill factor over 911 hours.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Nanoscience & Nanotechnology
You Jin Park, Young In Jeon, In Seok Yang, Hyunsue Choo, Woo Seok Suh, So-Yeon Ju, Hui-Seon Kim, Jia Hong Pan, Wan In Lee
Summary: Novel TiO2 nanorods with different lengths are synthesized under a basic environment and applied as the electron transporting layer for perovskite solar cells. The nanorods exhibit superior photovoltaic performance compared to conventional TiO2 nanoparticles. Specifically, TiO2 nanorods with a length of 110 nm show the highest efficiency and improved long-term stability. The advantages of nanorod structures in the device and the suppression of charge recombination are discussed.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Physical
Yu-Na Kim, Ju-Hee Jo, Jeongho Kim, Hui-Seon Kim, Wan In Lee
Summary: Lithium bis(trifluoromethanesulfonyl)imide (LiTFSI) is commonly used as a dopant in 2,2',7,7'-tetrakis[N,N-di(4-methoxyphenyl)amino]-9,9'-spirobifluor-ene (spiro-MeOTAD), but it results in poor thermal stability. Recently, zinc(II) bis(trifluoromethanesulfonyl)imide (Zn(TFSI)2) has been proposed as a potential replacement for LiTFSI. This study explores the use of Zn(TFSI)2 as a dopant for spiro-MeOTAD to investigate the thermal stability of perovskite solar cells (PSCs).
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Sarnai Puntsagdorj, Agni Raj Koirala, Jargalsaikhan Gombovanjil, Nguyen Nguyen Khanh, Sang Do Sung, Wan In Lee, Kyung Byung Yoon
Summary: A facile stamping method was developed to assemble ordered arrays of mesoporous WO(3 )micropillars, and heterostructural bilayer photoanodes with different layer structures were successfully prepared. Among them, the 2.5/7.5 exhibited a higher photocurrent density, which can be attributed to multiple factors.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Physical
Jin Woo Park, Yeongsu Lim, Kyung-Yeon Doh, Min Tai Jung, Young In Jeon, In Seok Yang, Hyeon-seo Choi, Jeongho Kim, Donghwa Lee, Wan In Lee
Summary: Cu-doped Ag2BiI5 powders were synthesized and used as light absorbers in solar cells, leading to a notable increase in power conversion efficiency. The enhancement was mainly attributed to the significant increase in light absorption caused by Cu doping. Additionally, Cu doping did not affect the stability of Ag2BiI5 under high humidity conditions.
SUSTAINABLE ENERGY & FUELS
(2021)
Article
Multidisciplinary Sciences
Han-Sol Yun, Byeong-Gyu Yun, Hye-Min Lee, Dae-Yong Jeong, Wan-In Lee, Nam-Hee Cho
SN APPLIED SCIENCES
(2019)
Article
Chemistry, Physical
In Seok Yang, Soomin Lee, Juseob Choi, Min Tai Jung, Jeongho Kim, Wan In Lee
JOURNAL OF MATERIALS CHEMISTRY A
(2019)
