JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
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IF 6.3
Jingnan Jiao,Yongjie Zhang,Hong Zhang,Wenjiang Han,Tiantian Zhou,Yanfeng Sun,Shujie Pang,Shiwei Wang
The efficient detection of ethanol is crucial for environmental monitoring and human health. However, metal oxide semiconductors (MOS) such as CdSnO 3 often suffer from low sensitivity, poor selectivity, and high detection limits. Doping and heterostructure construction have been demonstrated as effective strategies to enhance the gas-sensing properties of MOS. In this work, a carbon-modified SnO 2 /CdSnO 3 heterostructure was synthesized by a one-step glucose-assisted hydrothermal method. Among them, CSO@C*6 based sensor exhibits the highest response toward ethanol gas. Its response value to 100 ppm ethanol is 47.52 at optimal working temperature of 237.5 ℃, 5.7 times higher than that of pure CdSnO 3 (8.27). Besides high response, the CSO@C*6 based sensor represents excellent selectivity, rapid response speed (1 s) and extremely low theoretical LOD to ethanol (2.81 ppb). The ethanol sensing performance of the CSO@C*6 was significantly enhanced, mainly due to (1) its high specific surface area, (2) carbon-induced oxygen enrichment effect and its hydrophobicity, and (3) the formation of n-n heterojunction. This work proposes a facile approach for synthesizing heterostructures and demonstrates the potential of carbon modification in improving gas-sensing performance.
研究领域:
材料科学
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传感器技术
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纳米材料
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半导体物理
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环境监测
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生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF NUCLEAR MATERIALS
·
2021
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IF 2.936
Jing Wang,Chenchen Niu,Kaiwen Hu,Xiujian Zhao,Kai Xu
Rhenium (Re), a non-radioactive surrogate for technetium (Tc), was incorporated into the lattice of SnO 2 by reductive co-precipitation process at room temperature, and Re volatility from Re(SnO 2 ) under different conditions (in air and N 2 and with glass frit) at elevated temperatures was carefully investigated. Re began to evaporate from Re(SnO 2 ) both in air and N 2 at 400 °C, while Re exhibited a faster volatilization in air than in N 2 , as all Re was gone at 1200 °C in air, but ∼40% of Re still remained at 1200 °C in N 2 . Additionally, Re did not volatilize from Re(SnO 2 )-containing glass frit until 800 °C and only ∼15% of Re volatilized at 1200 °C, suggesting the loss of Re decreased by ∼30% points through incorporation of Re into SnO 2 before vitrification. The analysis of Re valence transition revealed that the reduced Re 4+ was easily oxidized to volatile Re 7+ in air, but in N 2 , Re 4+ disproportionated to form Re 7+ and the lower valence states of Re at temperatures from 600 °C to 1000 °C. In Re(SnO 2 )-containing glass frit, the formation of NaReO 4 during vitrification inhibited Re 7+ volatilization before 800 °C, while the presence of Re 4+ in the glass melt enhanced Re retention at temperature above 800 °C.
研究领域:
材料科学
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核化学
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环境科学
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry A
·
2019
·Vol. 7
·期 17
·10636-10643
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IF 10.733
Hongri Liu,Zhiliang Chen,Haibing Wang,Feihong Ye,Junjie Ma,Xiaolu Zheng,Pengbin Gui,Liangbin Xiong,Jian Wen,Guojia Fang
The electron transport layer (ETL) is a critical component in planar single junction or tandem perovskite solar cells (PSCs), dominating the separation and electron extraction of charge carriers. Herein, we introduce a facile route to synthesize a SnO2 quantum dot (QD) colloidal solution at room temperature using an alcohol-based solvent with the additive of deionized-water. A superior homogeneous ETL is obtained by spin coating of the QD colloidal solution with post-deposition annealing. Compared to the ETL prepared with the SnCl2·2H2O anhydrous alcohol solution, the champion power conversion efficiency of PSCs deposited on the SnO2 QD based ETL is raised to 20.1% from 16.5%. The better performance is attributed to the excellent optical and electronic properties of the SnO2 QD based ETL. Experimental analyses reveal that the SnO2 QD based ETL enhances electron extraction and suppresses charge recombination, leading to improvement of solar cell performance. The appropriate concentration of the SnO2 QD based solution is explored and the appropriate ratio of anhydrous alcohol to deionized water of the SnO2 colloidal solution is obtained. Our results show the great potential of low temperature synthesized SnO2 QD films for application as ETLs or interconnecting buffer layers for future highly efficient and reproducible low-temperature processed tandem PSCs.
研究领域:
材料科学
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能源技术
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纳米科技
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2020
·
IF 4.939
Feipeng Wang,Kelin Hu,Hongcheng Liu,Qi Zhao,Kaizheng Wang,Yuxin Zhang
In this work, we introduced a structure of Pd coated SnO 2 nanofiber rods (NFRs) prepared by electrospinning and magnet sputtering. Pd was first deposited on the obtained nanofibers as a catalyst and then fully dispersed during the resulting of SnO 2 to improve the hydrogen response. The gas sensing tests showed the palladium enhanced the hydrogen response at low temperature (160 °C). When the hydrogen gas concentration was 100 ppm, the limit of detection (LOD) of sensor was as low as 0.25 ppm and the response time was as short as 4 s. Moreover, Pd coated SnO 2 also had excellent hydrogen selectivity and repeatability. The gas sensor was suitable for the detection of hydrogen in low-temperature environment. This work provided a new method for the low temperature hydrogen gas sensor with a fast response and low LOD .
研究领域:
材料科学
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传感器技术
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纳米材料
·
气体传感
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功能材料
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电纺丝技术
✓ 已验证
DOI
高影响因子
Functional Materials Letters
·
2024
·
IF 1.2
Kangjun Geng,Zhengdong Feng,Tingyu Zhang,Shan Huang,Honcheng Zhu,Bangzhi Shen,Boning Dong,Yan Yan,Sai Jiang,Jianhua Qiu,Huafei Guo
Antimony Selenide (Sb 2 Se 3 ) exhibits potential as a solar energy material owing to its optimal bandgap, lack of toxicity, and abundance of earth abundant elements. Currently, cadmium sulfide (CdS) serves as the predominant buffer layer for Sb 2 Se 3 solar cells. However, the use of CdS hinders environmentally friendly advancement due to the toxic properties of the element cadmium. Hence, the quest for non-toxic buffer layers poses a significant challenge to the further advancement of Sb 2 Se 3 solar cells. In prior research, tin oxide (SnO 2 ) has been explored as a buffer layer. Nonetheless, the efficiency of SnO 2 /Sb 2 Se 3 solar cells was hampered by the rough surface of SnO 2 films and the poor crystallinity of Sb 2 Se 3 films. In this investigation, we enhanced device efficiency by improving the uniformity of the SnO 2 surface and enhancing the crystallinity of Sb 2 Se 3 through spin-coating sulfur (S) onto the SnO 2 film. Detailed examinations were conducted on the structure, optical, and electrical properties of the respective SnO 2 and Sb 2 Se 3 thin films. Ultimately, an efficiency of 3.38% was achieved using the spin-coated S:SnO 2 film, marking an 85% enhancement compared to the baseline device.
研究领域:
光伏技术
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材料科学
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薄膜技术
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可再生能源
✓ 已验证
DOI
高影响因子
THIN SOLID FILMS
·
2013
·
IF 1.604
Mi Wang,Yanfeng Gao,Zhang Chen,Chuanxiang Cao,Jiadong Zhou,Lei Dai,Xuhong Guo
High-quality transparent and conductive tungsten-doped tin oxide (SnO 2 :W) thin films with different thickness (from 60 to 600 ± 10 nm) were fabricated on quartz glass substrates by a solution-based method. A stable solution was prepared from tin chloride and ammonium tungstate together with polyvinyl alcohol as a film-forming promoter. It was found that all films showed homogeneous composition, smooth surface with no cracks and high transparency with the optical band gap ranging from 3.93 to 4.31 eV. The effect of tungsten concentration, spin rate and annealing temperature on the morphological, electrical and optical properties of the films has been investigated. W doping has a large influence on the microstructure and the conductivity of the SnO 2 thin films . The lowest resistivity of 2.8 × 10 − 3 Ω · cm was obtained for a SnO 2 : 3 at% W film, which was prepared at 3000 rpm and annealed at 800 °C in air. An eight-layer film with a sheet resistance of 60 Ω/□ and a thickness of 606 nm could be fabricated by multiple coating operation, which still exhibited an optical transmittance of over 80% in the visible region from 400 to 700 nm.
研究领域:
材料科学
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薄膜技术
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光电子学
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半导体掺杂
✓ 已验证
DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
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2020
·
IF 3.807
Zhen-Kun He,Ali Reza Kamali,Zeng-Rong Wang,Qiang Sun,Zhongning Shi,Dexi Wang
Li surface diffusion kinetics is an important parameter in determining the electrochemical performance of metal oxide electrodes used in Li ion batteries. Here, we investigate this parameter in SnO 2 nanobelts . A low cost, simple and facile in-situ calcination method is developed to fabricate highly crystalline SnO 2 nanobelts with surface oxygen vacancies using commercially available tin oxide particles as the precursor. The phase composition , morphology and surface characteristics of the SnO 2 nanobelts are investigated by several techniques, including the X-ray diffraction and photoelectron spectroscopy, high resolution electron microscopy and electrochemical evaluations. The Li ion surface diffusion coefficients of nanobelts are investigated by impendence spectroscopy and sweep voltammetry measurements; and found to be 1.07 × 10 −11 cm 2 s −1 . Such enhanced Li surface diffusion kinetics as well as significant contribution from pseudocapacitance result in an excellent Li-ion storage performance of SnO 2 nanobelts, while the free space between the nanobelts provides morphological stability during prolonged battery cycles.
研究领域:
材料科学
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电化学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2019
·
IF 3.45
Kelin Hu,Feipeng Wang,Hongcheng Liu,Yanqiong Li,Wen Zeng
Pd-doped SnO 2 nanofibres were prepared by electrospinning and magnetron sputtering . It was found that the efficiency of gas sensing properties in these fibres depends primarily on the density of oxygen vacancies , which can be regulated by plasma treatment. We demonstrated that moderate plasma treatment can increase the oxygen vacancy as well as improve the gas sensing performance of SnO 2. However, excessive plasma treatment led to the production of other substances that deteriorated the gas sensing performance. Furthermore, the best results for hydrogen gas sensing were obtained when the nanofibres were subjected to plasma treatment for 1 min. The fabricated material demonstrated a response of more than 53 for 500 ppm hydrogen at the optimum temperature (130 °C), which is a significant improvement as compared to sensors without plasma treatment. Evidently, plasma treatment is an effective method to further enhance the sensing properties of the fabricated nanofibres.
研究领域:
材料科学
·
传感器技术
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2020
·
IF 7.1
Ao Liu,Siyuan Lv,Lianjing Zhao,Fangmeng Liu,Jing Wang,Rui You,Zijie Yang,Junming He,Li Jiang,Chenguang Wang,Xu Yan,Peng Sun,Geyu Lu
In this work, polyaniline (PANI) coated Rh-doped SnO 2 hollow nanotubes (PRS) were synthesized via electrostatic spinning and in-situ polymerization technique. The obtained samples were characterized by X-ray diffractometer, Field emission scanning electron microscopy, Transmission electron microscopy, X-ray photoelectron spectroscopy and Brunauer-Emmett-Teller. The gas sensing performances of the sensors based on PRS nanotubes were investigated systematically at room temperature. It was shown that the polyaniline coated 0.5 mol% Rh-doped SnO 2 nanotube (PRS0.5) sensor exhibited the highest response value of 13.6 to 100 ppm NH 3 at room temperature with excellent selectivity, acceptable repeatability and favorable flexibility. The enhanced gas sensing performances were due to the morphology structure, the heterojunction between PANI and Rh-SnO 2 and the catalytic effect of Rh 2 O 3 . Thus, the PANI coated Rh-doped SnO 2 hollow nanotubes could be a promising candidate for designing and fabricating flexible NH 3 gas sensor at room temperature.
研究领域:
材料科学
·
传感器技术
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2025
·
IF 5.6
Ting Liu,Hao Xu,Shuai Liu,Weimin Wang,Kaikai Song,Lina Hu
Lithium metal batteries are among the most promising energy storage systems due to the high energy density. However, its practical application is hindered by growing lithium dendrite and unstable solid electrolyte interphase. Three-dimensional conductive collectors have been widely proposed to solve the above problems, while their lithophobic behavior has no favorable effect on lithium plating/stripping. Composite anode (CF@SnO 2 -1.0@Li) with homogeneous SnO 2 lithophilic sites are prepared, the lithium nucleation barrier is lowered through SnO 2 , and homogeneous deposition of lithium ions is induced, and consequently the growth of lithium dendrites and the formation of “dead Li” are suppressed. The CF@SnO 2 -1.0@Li symmetrical cells can stable cycle for more than 2200 h at 1 mA cm −2 and 1 mAh cm −2 . The assembled LiFePO 4 full cell exhibits a high initial discharge capacity of 145.1 mAh g −1 and a high capacity retention rate of 94.3% after 300 cycles at 1 C. Similarly, the assembled LiCoO 2 full cell shows outstanding rate performance and cycling stability. This study provides a new strategy for the development of ultrastable lithium metal batteries.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2024
·
IF 8.1
Xiaobo Wang,Kaixuan Huo,Zhengqiu He,Jialiang Liu,Qingshan Zhao,Jinqiang Zhang,Mingbo Wu
Stannic oxide (SnO 2 )-based lithium-ion batteries (LIBs) have garnered tremendous attention due to their high theoretical capacity and suitable lithium ion insertion potential. However, their widespread applications have been hindered by severe electrode degradation caused by substantial volume expansion of SnO 2 . In this study, we embedded amorphous carbon encapsulated ultrafine SnO 2 nanoparticles on hollow macroporous carbon (AC@SnO 2 /HMC) as a superior anode material for LIBs. The unique Sn–C interface and dual carbon protection layers effectively mitigated SnO 2 nanoparticle agglomeration and volume expansion, reinforcing the cycling stability. Additionally, the capacitive contribution from amorphous carbon significantly improved the reversible capacity and rate capability. As such, the resulting AC@SnO 2 /HMC electrode exhibited high capacity (1828 mAh g −1 after 200 cycles at 0.1 A g −1 ), excellent rate capability (1017.6 mAh g −1 at 1 A g −1 ), and outstanding cycling performance (792.1 mAh g −1 after 880 cycles at 2 A g −1 ), surpassing previously reported SnO 2 -based anodes. Furthermore, the AC@SnO 2 /HMC-based Li-ion full cell demonstrated a remarkable capacity of 566.3 mAh g −1 at 0.2 A g −1 after 200 cycles. This study offers valuable insights into the development of advanced SnO 2 -based anodes for LIBs and beyond, highlighting their potential for future advancements in battery technology.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2016
·
IF 4.803
Lechen Chen,Xiaohang Ma,Mozhen Wang,Chunhua Chen,Xuewu Ge
The structure design of SnO 2 -based anode material is crucial for the development of high-performance lithium-ion batteries (LIB). Here, a solvent-evaporation induced codeposition of monodispersed polystyrene (PS) microspheres (241 nm) and γ-radiation reduced graphene oxide (rGO) at the presence of the surfactant, cetyltrimethylammonium bromide (CTAB), has been firstly conducted to prepare a self-stand PS/rGO composite template film, which can transform into a porous SnO 2 /rGO composite material after being infiltrated with the precursor of SnO 2 and further calcinated at 420 °C. TGA, SEM, TEM, and nitrogen adsorption-desorption isotherms analyses indicate that the prepared SnO 2 /rGO composite material has 52.1 wt% of rGO, and a hierarchical pore structure, i.e., mesopores (3.312 nm) and macropores (∼200 nm) coexist. The half-cell using the hierarchical porous structured SnO 2 /rGO composite as the electrode exhibits an excellent cycle performance (850 mAh g −1 in 100 cycles at a current density of 0.3C) and rate property of 436 mAh g −1 at a current density of 4.5C. This work indicates that the incorporation of graphene-based materials into hierarchical porous SnO 2 matrix will be a potential way to obtain high-performance LIB anode material.
研究领域:
材料科学
·
能源技术
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）