Article
Chemistry, Analytical
Li Wang, Shuyi Ma, Xiaoli Xu, Jianpeng Li, Tingting Yang, Pengfei Cao, Pengdou Yun, Shengyi Wang, Ting Han
Summary: In this study, terbium-doped SnO2 nanotubes were synthesized and characterized for gas sensing applications. XPS analysis revealed that 7% terbium-doped SnO2 showed the best sensitivity to ethanol at 100 ppm, reaching 53.6 at 200 degrees Celsius. The doping of terbium increased the number of active sites on the surface of SnO2, enhancing gas sensitivity and electrical responsiveness.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Materials Science, Multidisciplinary
Julakanti Shruthi, Nagabandi Jayababu, M. V. Ramana Reddy
Summary: Ag:Y2O3-SnO2 core-shell nanocomposites were fabricated for high-efficiency gas sensing applications, showing superior sensing performance and good stability towards low concentrations of ammonia. The sensor exhibited rapid response and recovery time, as well as increased sensitivity towards ammonia at room temperature.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2022)
Article
Environmental Sciences
Ch Venkata Reddy, Raghava Reddy Kakarla, Jaesool Shim, Rustem R. Zairov, Tejraj M. Aminabhavi
Summary: In this study, pure and chromium-doped SnO2 nanoflakes were synthesized and their photocatalytic and photoelectrochemical properties were investigated. The doped SnO2 exhibited high catalytic activity and enhanced photocurrent density compared to the pure samples. The synthesized nanoflakes showed significant dye removal efficiency and are suitable for water oxidation and photodegradation of organic pollutants.
ENVIRONMENTAL RESEARCH
(2023)
Article
Chemistry, Physical
Jiajun Wang, Guangliang Chen, Yongzhe Zhang, Zhuoyi Chen, Bin He, Tongtong Li, Kostya Ken Ostrikov
Summary: This study develops a carambola-like In-Ni3Se4-CoSe2 electrocatalyst on a low-temperature plasma treated Ni-Co foam to address the issue of insufficient activity and stability of electrocatalysts under industry-relevant conditions. Electrochemical results show that the overpotential of In-Ni3Se4-CoSe2 for transferring a current density of 10 mA cm-2 (j10) is only 30 mV, comparable to the benchmark 20% Pt/C catalyst. The optimized electrode material stimulated with 300 mV exhibits intrinsic activity 5 times higher than that of Ni3Se4-CoSe2/PNCF catalyst due to the creation of rich active sites and accelerated electron transfer caused by indium doping. Long-term stable operation over 50 h in simulated industrial working environments and in-situ Raman spectroscopy confirm the excellent stability and durability of the developed electrocatalyst in alkaline media.
APPLIED SURFACE SCIENCE
(2023)
Article
Physics, Multidisciplinary
Rituraj Mahanta, Pawan Chetri, Dulen Bora
Summary: Photocatalysis triggered by visible light is an effective method for addressing environmental pollution and the energy crisis. Doping pure semiconductors with plasmonic metal nanoparticles can transform numerous metal oxide semiconductors into visible light active photocatalysts. In this study, we thoroughly investigated the photocatalytic properties of pure SnO2 nanoparticles and SnO2 doped with different percentages of 'Ag'. The results showed that 'Ag' doping significantly improved the photodegradation of methyl orange, and this enhancement was mainly attributed to surface defects and surface plasmon resonance effect caused by 'Ag' doping.
Article
Materials Science, Ceramics
Mrudul Modak, Shweta Jagtap
Summary: In this study, SnO2-rGO and N-doped SnO2-rGO nanohybrids were synthesized by a facile hydrothermal method. The synthesized nanohybrids exhibited a tetragonal rutile structure of SnO2 lattice. Various characterization techniques were used to investigate the structural, chemical, morphological and optical properties of the nanohybrids. The gas sensing properties of the nanohybrids were also studied in detail, showing excellent NO2 sensing response at low temperature and low gas concentration, as well as remarkable stability. The superior performance can be attributed to the synergetic effect of small particle size, high defect concentration and high surface area.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Ceramics
S. Laghrib, M. Benhaliliba, H. Adnani, D. Abdi
Summary: Pure and In-doped tin oxide (SnO2) thin layers grown by sol-gel route were studied. Annealing at 500°C for 1 hour resulted in good homogeneity and a smooth uniform surface with a nanostructured appearance. As-grown films showed high transparency in the visible range and absorption in the UV band, with a wide bandgap of 4.1 eV that decreased with Indium doping. The resistivity decreased to 6.08 x 10(-3) Oxcm due to the insertion of Indium cations into the Tin oxide host material. The effects of film number, doping, film thickness, and annealing temperature on the film properties were observed. 30% In-doped SnO2 layers with the lowest resistivity (6.08 x 10(-3) Oxcm) are interesting results for the fabrication of transparent conductive oxide (TCO). These as-grown films can be a competitive TCO as a window layer for solar cell applications due to their high transparency and low resistance caused by In-doping.
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Geeta Bhatia, Aman Deep Acharya, M. M. Patidar, V. K. Gupta, S. B. Shrivastava, V. Ganesan
Summary: The study investigated a complete range of indium-doped (In:SnO2) thin films prepared by spray-pyrolysis technique to analyze their structure, surface, and electrical properties. The influence of indium filler concentration on the properties of SnO2 was explored, showing that the inclusion of indium can lead to structural distortion and impact the electrical behavior of the films. The analyses revealed that controlling the solid solution of indium into SnO2 within a certain range is crucial for optimizing the electrical properties.
BULLETIN OF MATERIALS SCIENCE
(2021)
Article
Chemistry, Analytical
Jing Zhou, Ziyan Li, Jianyu Hu, Chaoqun Wang, Rui Liu, Yi Lv
Summary: In this study, a sensitive lanthanide-labelled ICPMS method was proposed for DNA methylation analysis. The method effectively distinguished methylated DNA using the specific recognition of 8-oxo-G/5mC base pairs by hOGG1. Comparing with nucleic acid amplification strategies, this method is time-saving and has low probability of false positive. The validation in human serum samples demonstrated its potential application in clinical and biological samples quantitative analysis.
Article
Chemistry, Multidisciplinary
Jianyu Li, Zimo Pang, Chao Gao, Guangyue Zhang, Jianhong Dai, Tao Chen, Xin Su, Weiwei Zhou
Summary: A universal all-in-one blowing strategy, that integrates the carbonization and chalcogenization processes, is developed to fabricate as many as 32 kinds of transition metal chalcogenides/carbon nanosheets composites (termed TMCs@CNS). Both physical and chemical evolution processes have been studied to reveal the blowing mechanism. The highly tunable composition and structure of the products confer on them great promise in diverse fields.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Physical
Yaoxia Yang, Fengyao Guo, Lan Zhang, Dangxia Wang, Xingwei Guo, Xiaozhong Zhou, Dongfei Sun, Zhiwang Yang, Ziqiang Lei
Summary: This study proposes a method to synthesize Fe-doped CoNiSe2 nanosheets as OER electrocatalysts, and finds that the introduction of iron ions can promote the redistribution of cobalt-nickel charge density, thus enhancing the kinetics of oxygen evolution reaction. The material exhibits excellent activity, electrocatalytic properties, and stability in alkaline media.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Materials Science, Multidisciplinary
Tianyu Tang, Yanlin Tang
Summary: This study demonstrated that doping indium into Tl-Co double based perovskite material improved its structural stability and photoelectric performance.
RESULTS IN PHYSICS
(2023)
Article
Chemistry, Multidisciplinary
Jingwen Wang, Junjie Yuan, Jiajia Liu, Haixia Zou, Lin Yang, Hong Chen, Xiangmeng Qu
Summary: DNA self-assembly is a promising method for constructing complex nanostructures. However, the current approach requires separate design and professional operation, limiting its development and application. In this study, a novel point-and-shoot strategy based on enzyme-assisted DNA paper-cutting was proposed to construct planar DNA nanostructures using the same DNA origami as a template. By annealing the long scaffold strand and selected staple strands, planar DNA nanostructures were successfully constructed. This strategy overcomes the complexity limitation of planar DNA nanostructures and simplifies the design and operation process. Overall, this strategy shows great potential for manufacturing DNA nanostructures.
Article
Chemistry, Physical
Shankara S. Kalanur, Young Jae Lee, Hyungtak Seo
Summary: The study introduces a versatile BiVO4 thin film synthesis strategy that allows for morphology tunability, feasibility of doping, and heterojunction formation in a single step. This strategy can be extended to fabricate different nanostructures by changing capping agents, and has shown the feasibility of Al doping and heterojunction formation with WO3 nanostructure for enhanced PEC activity. The proposed strategy could be exploited using new capping agents and dopants for simultaneously obtaining doped BiVO4 in heterojunction systems with unique morphology.
APPLIED SURFACE SCIENCE
(2021)
Article
Chemistry, Physical
Likun Wang, Jingkai Yang, Hongli Zhao, Yong Liu, Gaorong Han, Jianxun Wang
Summary: A novel F and Nb co-doped SnO2 thin film with a rutile TiO2:Sn buffer layer showed improved crystallinity and reduced residual stress, resulting in increased carrier concentration and decreased resistivity. The film also exhibited an extremely low emissivity.
SURFACES AND INTERFACES
(2022)
Article
Engineering, Electrical & Electronic
Fanli Meng, Xi Luan, Chunjin Mi, Hanyang Ji, Hongmin Zhu, Zhenyu Yuan
Summary: Detecting precursor chemicals is of great importance for sniping drugs from the source. In this study, the semiconductor gas sensor array is used to measure precursor chemicals and interference samples under dynamic and static measurement. Qualitative and quantitative analyses are conducted using the principal component analysis, support vector machine, and K-nearest neighbor algorithms. The qualitative results show that the SVM and KNN algorithms perform well in the two measurement methods. For quantitative analysis, support vector regression is utilized, and the mean absolute error is smaller in the dynamic measurement than in the static measurement. Stability experiments conducted after a month reveal that the qualitative recognition in dynamic measurement is better than in static measurement, indicating the advantages of dynamic measurement for real-time detection of precursor chemicals.
IEEE SENSORS JOURNAL
(2023)
Article
Automation & Control Systems
Wenbo Qin, Zhenyu Yuan, Yanbai Shen, Fanli Meng
Summary: Alcohol detection is crucial for the health of chemical and food production personnel. In this study, macroporous perovskite-type LaFeO3 (LFO) microspheres were prepared by a simple method and found to exhibit high sensitivity and selectivity towards alcohols, particularly methanol. The macroporous characteristics of LFO facilitated the diffusion of methanol molecules and improved the gas sensing performance. Furthermore, analysis based on first principles revealed the adsorption characteristics and electron exchange processes of eight gases on the material surface.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2023)
Article
Chemistry, Multidisciplinary
Hongmin Zhu, Zhenyu Yuan, Yanbai Shen, Hongliang Gao, Fanli Meng
Summary: In this study, the electron polar transport properties of two-dimensional heterojunction material were discovered and utilized to greatly improve the selectivity of butanone sensors. By synthesizing ultra-thin porous ZnO nanosheets modified with SnO2/NiO heterogenous particles, a detection limit of 20 ppb for butanone was achieved with a response of 328 to 100 ppm butanone, the lowest known detection limit. The synergistic catalytic effect of SnO2/NiO heterogenous particles was revealed to contribute to the high response and low detection limit of butanone. The possible mechanism for the generation of electron polar transport phenomenon in two-dimensional heterojunction material was analyzed. This work provides a novel perspective for achieving both selectivity and detection limits in gas sensors, with universal applicability and application potential.
Article
Physics, Applied
Yanqiu Yang, Zhengzhao Wang, Ping Yan, Xin-Yao Yu
Summary: Layered double hydroxides (LDHs) have large specific surface areas and rich metal redox sites, making them potentially suitable oxygen evolution reaction catalysts. However, they often exhibit poor hydrogen evolution reaction (HER) activity due to limited conductivity and active sites. In this study, a plasma engraving strategy was developed to enhance the HER activity of NiFe LDH. The plasma engraving process improved the conductivity and active sites by reducing Ni2+ to Ni nanoparticles, generating more oxygen vacancies, and exfoliating nanosheets into thinner ones. The plasma-engraved NiFe LDH (PEH) showed enhanced HER activity with low overpotential and small Tafel slope, outperforming regular NiFe LDH. Furthermore, PEH also displayed excellent HER activity in alkaline real seawater and overall water splitting.
APPLIED PHYSICS LETTERS
(2023)
Article
Materials Science, Multidisciplinary
Tian-Yao Qi, Zhen-Yu Yuan, Fan-Li Meng
Summary: This study achieved trace determination of PAA at ultra-low concentrations using hydrogen bond adsorption and electrochemical catalysis. The modified electrode had a wide response range and low detection limit for PAA, providing a feasible scheme for the detection of other drugs and aromatic precursor chemicals.
Article
Chemistry, Multidisciplinary
Hua Zhang, Wenjie Zhao, Fanli Meng
Summary: This study prepared cobalt-modified zinc oxide nanosheets using ZIF-67 as a cobalt source, and found that the sensor ZC2 exhibited high sensitivity and low detection limit to 2-butanone. It showed a strong response (2540) to 100 ppm 2-butanone at 270°C, which was 21 times higher than pure ZnO materials. The detection limit was also optimized to 24 ppb. The sensor (ZC2) demonstrated excellent selectivity, repeatability, and stability over 30 days. The synergistic and catalytic effects of p-n heterojunction were identified as the key factors for optimizing the performance of 2-butanone sensors.
Correction
Chemistry, Multidisciplinary
Jingyi Shi, Niannian Wang, Wenhao Du, Yi Feng, Xin-Yao Yu
MATERIALS CHEMISTRY FRONTIERS
(2023)
Article
Chemistry, Physical
Qi Qi, Duo Shao, Yitong Zhou, Qi Wang, Xin-Yao Yu
Summary: By using a N2/H2 plasma activation strategy, multiple HER active species (Ni, Ni3N, and MoNi4) are implanted in molybdenum-based polyoxometalate (POM)-encapsulated Ni MOF nanosheet arrays, resulting in enhanced conductivity and increased active sites. The plasma-activated Ni MOF/POM exhibits splendid HER activity and long-term stability.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Chemistry, Multidisciplinary
Jingyi Shi, Niannian Wang, Wenhao Du, Yi Feng, Xin-Yao Yu
Summary: The exploration of high-performance trifunctional electrocatalysts for ORR, OER, and HER is crucial for sustainable energy technologies. In this study, porous RuO2-Co3O4/C (RuCoO/C) nanocubes were synthesized using a facile template-engaged approach as advanced trifunctional electrocatalysts. The RuCoO/C nanocubes exhibited high performance in ORR, OER, and HER, as well as excellent stability. When applied in ZABs and water electrolysis, the RuCoO/C nanocubes demonstrated high efficiency and splendid stability.
MATERIALS CHEMISTRY FRONTIERS
(2023)
Article
Chemistry, Multidisciplinary
Yanrui Xu, Wangjian Liu, Zihang Xu, Yitong Zhou, Xin-Yao Yu
Summary: We report an effective catalyst composed of in situ reconstructed AgZn3 nanoparticles and Zn nanoplates for syngas synthesis, showing tunable H2/CO ratios and high Faraday efficiency. Experimental and theoretical results suggest that the Zn site in AgZn3 nanoparticles and the hollow site between Ag and Zn in AgZn3 are the active sites for CO and H2 generation, respectively. This work has important implications for designing dual site catalysts for CO2 electroreduction to tunable syngas.
CHEMICAL COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Hongmin Zhu, Hanyang Ji, Zhenyu Yuan, Yanbai Shen, Hongliang Gao, Fanli Meng
Summary: The Wolkenstein model has been the main mechanism for semiconductor sensing of oxygen adsorption and desorption since it was proposed in the 1990s. However, metal oxide-based sensors targeting ammonia face difficulty in achieving sub-ppm detection limits, high selectivity, high response, and room temperature operation under the oxygen adsorption desorption mechanism. To address this, a CO2-catalyzed intermediate adsorption-based sensing mechanism was proposed, utilizing CO2 instead of oxygen to achieve adsorption-desorption equilibrium. C-SnO2 plays a reductive role in the response process, resulting in high selectivity, anti-interference, and low detection limits for ammonia gas at room temperature.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Engineering, Electrical & Electronic
Hua Zhang, Haoting Zhang, Zhenyu Yuan, Yudong Li, Fanli Meng
Summary: This article designs an Ag-doped Zn2SnO4 gas sensor to detect the ultralow concentration of triethylamine (TEA) by utilizing the catalytic activation effect of precious metal silver and the unique physical and chemical properties of ternary metal oxides. The gas sensor based on 3 at% Ag-doped Zn2SnO4 shows the best gas sensing performance for TEA, with a response of 273.33 to 100-ppm TEA at 250 degrees C and a minimum detectable concentration level of 100 ppb. The material also demonstrates fast response time, good stability, and high selectivity.
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
(2023)
Article
Engineering, Electrical & Electronic
Zhenyu Yuan, Haoting Zhang, Jingfeng Li, Fanli Meng, Zhiqiang Yang, Hua Zhang
Summary: In this article, ZnO-In2O3 sensors modified with noble metal Ag were designed for rapid detection of hydrogen at low temperatures. The Ag NPs-loaded ZnO-In2O3 sensor showed a response of 103.75 to 100 ppm H2 at 160 ? with response/recovery times of 1.6 and 47.8 s, respectively, and a lowest detectable gas concentration of 2 ppm. The sensor also exhibited favorable repeatability, stability, and excellent selectivity.
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
(2023)
Article
Chemistry, Analytical
Mengran Ran, Zhenyu Yuan, Hongmin Zhu, Hongliang Gao, Fanli Meng
Summary: This study reports a novel Ni(OH)(2)/Co3O4 heterostructured nanomaterial with excellent performance in xylene gas detection. The material exhibits a lower optimal operating temperature, higher response, and lower detection limit compared to other gases. The outstanding performance is attributed to the p-n heterojunction between Ni(OH)(2) and Co3O4. This research provides a strategy for designing high-performance xylene gas sensors using two-dimensional Ni(OH)(2) materials.
Article
Engineering, Environmental
Yang Liu, Hanyang Ji, Zhenyu Yuan, Yanbai Shen, Hongliang Gao, Fanli Meng
Summary: Defect engineering is an effective method to regulate the properties of functional materials. This study proposes a strategy to control the content of Co2+ and oxygen vacancies in Co3O4 by calcination of Co layered double hydroxides. The results show that by modulating Co2+ and oxygen vacancies, the sensitivity of the material can be enhanced, providing a new idea for increasing active sites.
CHEMICAL ENGINEERING JOURNAL
(2023)
