JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2022
·Vol. 33
·期 6
·3237-3249
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IF 2.779
Wang Siyu,Guo Jiaxiong,Lin Zhidong,Liu Liming,Hui Yuchong,Zhang Xiaowen
A series of very small grain Au/SnO 2 composites were synthesized by a facile hydrothermal method. The microstructure of the Au/SnO 2 composites were characterized by X-ray diffraction, scanning electron microscope, transmission electron microscopy, and nitrogen adsorption–desorption experiment. The composites were composed of 20–30 nm spherical nanoparticles, which are hierarchical structure composed of 8 nm Au cores and 5 nm SnO 2 nanograins. The composites were porous material with large specific surface area. The sensors based on the Au/SnO 2 composites showed high sensitivities and selectivity to n -butanol at low working temperature with fast response. Among these sensors, the 1.5 wt% Au/SnO 2 -based sensor shows the highest response (2662.8) to 100 ppm n -butanol with the response time of 35 s at 80 °C. The excellent low-temperature gas-sensing properties of the Au/SnO 2 sensors can be ascribed to the synergetic effect of high surface energy of small SnO 2 nanograins and catalysis of gold nanoparticles. Our study demonstrates that controlling the grain size of SnO 2 and Au nanoparticle-assisted gas sensing are effective methods to improve the sensing properties of SnO 2 at low working temperature. The 1.5 wt% Au/SnO 2 composite is a potential low-temperature gas-sensing material for n -butanol detection.
研究领域:
材料科学
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传感器技术
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2017
·
IF 5.401
Wen-Tao Li,Xiao-Dong Zhang,Xin Guo
Ni-doped SnO 2 nanofiber array was prepared from a modified electrospinning technique followed with hot-press and calcination, which impart the nanofiber with high crystallinity as well as good adhesion to the substrate. The nanofiber array consists of well-aligned straight fibers with an average diameter of ∼200 nm and length of several millimeters. Each fiber consists of rutile-structured polycrystals with an average grain size of ∼5 nm. Conductometric gas sensors were developed from the nanofiber array using magnetron sputtering. These sensors show excellent performance for NO 2 detection at 250 °C, including high response (90.3 under 20 ppm), fast response and recovery (40 s/18 s), and above all, excellent selectivity. Beneficial for electron transport, the nanofiber array offers better device performance over random nanofibers on sensing response and time for recovery. In addition, the NO 2 sensing mechanism was probed with detailed DRIFT and XPS analysis.
研究领域:
材料科学
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环境科学
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传感器技术
✓ 已验证
DOI
高影响因子
ACS Applied Nano Materials
·
2025
·
IF 5.5
Ping Cao,Yaohao Zhang,Yi Gao,Limei Zhang,Zhengyang Ji,Xinyue Cong
Organic–inorganic hybrid perovskite solar cells (PSCs) have attracted significant attention in recent years due to their exceptionally high theoretical photoelectric conversion efficiency. Although substantial breakthroughs have been made in controlling the bandgap by adjusting the ratio of organic–inorganic compounds, research on the electron transport layer (ETL) and hole transport layer has been largely overlooked, which greatly limits the further development of PSCs. In this study, a multilayer electron transport layer (ETL) was constructed based on ZnO nanofilms, utilizing MgO and SnO2 with similar lattice dimensions to create a multilayer nanofilm structure. This design achieved energy level alignment, reduced exciton migration energy, and suppressed nonradiative recombination. Compared to the ZnO-SnO2 bilayer ETL, the ZnO-MgO-SnO2 multilayer ETL demonstrated a 142% improvement in photoelectric conversion efficiency. Finite element analysis from a microscopic perspective revealed the influence of MgO on carrier concentration. Additionally, first-principles calculations elucidated the transition of MgO from an insulator to a wide-bandgap semiconductor as it transformed from bulk crystal to nanofilm. The ZnO-MgO-SnO2 multilayer model explained the changes in the energy band structure of the multilayer ETL, providing a theoretical foundation for continuously enhancing the photoelectric conversion efficiency of PSCs.
研究领域:
材料科学
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能源技术
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物理化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Physical Chemistry C
·
2023
·
IF 3.7
Yong Yang,Shenman Yao,Wufei Gong,Yan Liang,Ting Yu,Cailei Yuan
Light excitation has been developed as an economical way to realize room-temperature gas sensing recently. However, the high recombination rate of photogenerated carriers in semiconductor gas sensing materials leads to very limited carriers that can effectively take part in sensing reactions, which greatly restricts the further performance improvement of gas sensing under light excitation. Here, a hierarchical Z-scheme heterostructure microsphere of MoS2/SnO2 is designed and prepared. The heterostructure demonstrates an outstanding NO2 sensing performance at room temperature with the excitation of a low-power LED light (0.06 W), which exhibits an ultrahigh sensitivity of 264.2 to 10 ppm of NO2 along with acceptable response/recovery properties. The physical mechanism of NO2 sensing is analyzed. The results suggest that the construction of the Z-scheme heterostructure between MoS2 and SnO2 can greatly promote the separation of photogenerated carriers so that more photogenerated carriers can take part in the NO2 sensing reaction. Furthermore, the designing of a hierarchically porous structure can provide abundant active sites for gas sensing reactions. The work not only expands the development of Z-scheme heterostructures in gas sensing but also provides a strategy to promote the performance of light-excited gas sensors by designing a Z-scheme heterostructure with a hierarchically porous structure.
研究领域:
材料科学
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传感器技术
✓ 已验证
DOI
高影响因子
Nature Communications
·
2025
·Vol. 16
·期 1
·1-10
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IF 15.7
Dong Hao,Luo Ran,Zhang Gong,Li Lulu,Wang Chaoxi,Sun Guodong,Wang Hongyi,Liu Jiachang,Wang Tuo,Zhao Zhi-Jian,Zhang Peng,Gong Jinlong
Direct electrochemical ethylene (C 2 H 4 ) epoxidation with water (H 2 O) represents a promising approach for the production of value-added ethylene oxide (EO) in a sustainable way. However, the activity remains limited due to the sluggish activation of C 2 H 4 and the stiff formation of *OH intermediate. This paper describes the design of a Ag/SnO 2 electrocatalyst to achieve efficient electrochemical C 2 H 4 epoxidation with a high faradaic efficiency of 39.4% for EO and a high selectivity of 91.5% at 25 mA/cm 2 in a membrane electrode assembly. Results of in situ attenuated total reflection infrared spectra characterizations and computational calculations reveal that the Ag/SnO 2 interface promotes C 2 H 4 adsorption and activation to obtain *C 2 H 4 . Moreover, electrophilic *OH is generated on the catalyst surface through H 2 O dissociation, which further reacts with *C 2 H 4 to facilitate the formation of *C 2 H 4 OH, contributing to the enhanced electrochemical epoxidation activity. This work would provide general guidance for designing catalysts for electrochemical olefin epoxidation through interface engineering.
研究领域:
材料科学
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电化学
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催化化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Nano Materials
·
2025
·
IF 5.5
Yong Yan,Xigui Lan,Yuzhou Li,Meihua Liang,Xiaodong Liu,Jiaxuan Yang,Rongrong Jia,Yuanyuan Ge,Zhili Li,Lei Huang
The development of highly sensitive and ultralow-power NO2 sensors is crucial for real-time NO2 monitoring. This study synthesizes tiny SnO2 nanoparticles with enriched oxygen vacancies for use in microelectromechanical system (MEMS) gas sensors, enabling ppb-level NO2 detection at reduced operating temperatures. PVP was used to adjust the particle size and surface oxygen vacancies in the hydrothermal method. The gas sensing performance shows that the 0.75 g PVP-SnO2 exhibited the highest response of 14.7 to 500 ppb NO2 at a low operating temperature of 102 °C, which is 3.2 times higher than that of the 0.00 g PVP-SnO2 sensor under the same conditions. Compared to similar studies, this sensor achieved a high response value and ultralow power consumption of 8.4 mW. The improvement in performance is mainly attributed to N doping and the abundance of oxygen vacancies. This research presents a promising strategy for the development of high-performance, low-energy, real-time NO2 gas sensors.
研究领域:
材料科学
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环境监测
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传感器技术
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2019
·Vol. 9
·期 40
·22875-22882
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IF 3.049
Pengjian Wang,Tingbiao Yuan,Huifang Yuan,Xiaoyan Zheng,Hamza Ijaz,Junfeng Hui,Daidi Fan,Yuxin Zhao,Shi Hu
In this paper, we developed a simple two-step route to prepare a PdO/SnO2 heterostructure with the diameter of the SnO2 and PdO nanoparticles at about 15 nm and 3 nm, respectively. In the evaluation temperature window between 80 °C and 340 °C, PdO/SnO2 shows the best response to 100 ppm of CO at 100 °C with fast response time (14 s) and recovery time (8 s). Furthermore, the PdO/SnO2 nanoparticles exhibit a low detection limit and good selectivity to CO against interfering gases as well as rarely-seen low-temperature stability and reversibility. Such enhanced gas sensing performance could be attributed to both the ultrafine structure of PdO and the synergy between PdO and SnO2. The results clearly indicate the application of PdO/SnO2 as a pratical low-temperature sensing material for CO.
研究领域:
材料科学
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传感器技术
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纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ELECTROCHIMICA ACTA
·
2023
·
IF 6.6
Xuewen Xie,Jinbo Zhao,Shangtao Liang,Xiong He,Chenghao Yu,Ruzhen Xie,Jiale Xu,Lihui Yang,Dengmiao Cheng,Hui Lin
Herein, we reported using nontoxic Ce for co-doping to reduce the dopant amount of highly toxic Sb, resulting in a boost to the ability of SnO 2 reactive electrochemical membrane (REM) in the oxidation of refractory herbicide atrazine (ATZ). The study found that co-doping Ce causes the expansion of SnO 2 crystal and yields numerous defects on the SnO 2 crystal surface, creating more reactive sites and significantly enhancing the catalytic activity of Sb-doped SnO 2 REM. A single-pass through the Sb, Ce co-doped SnO 2 REM system could reduce ATZ in a real groundwater sample from a 10 μg·L –1 of feed concentration to steadily below the EAP regulatory maximum contaminant level of 14 nM. The addition of high concentrations of chloride and natural organic matters greatly inhibits the oxidation of ATZ, whereas solution pH and bicarbonate have less effect. Quenching experiments demonstrate that hydroxyl radical ( • OH) plays the key role in ATZ oxidation. The degradation by-products of ATZ were identified using high-resolution mass spectrometry , and possible degradation pathways, including • OH‐induced de-alkylation and • OH de-chlorination processes, were proposed based on the by-products’ concentration changes. Biological toxicity tests using freshwater green algae Chlorella vulgaris demonstrated that the toxicity of ATZ effluent was greatly eliminated.
研究领域:
环境科学
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水处理技术
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Yidong Ming,Yongqi Zhu,Yuan Chen,Bowen Jin,Chenhui Duan,Zihui Liang,Li Zhao,Shimin Wang,Binghai Dong,Haijin Li,Congcong Wu
SnO2 films as a promising electron transport layer (ETL) have been widely used in planar-type perovskite solar cells to achieve an impressive improvement in the conversion efficiency. However, compared with a mesoporous ETL, the interfacial charge carrier transfer of the SnO2 ETL is severely limited due to the issues of oxygen vacancy defects and crystal lattice mismatch between SnO2 and the perovskite, which generally leads to the growth of randomly stacked and porous perovskite layers and subsequently impacts the charge transport and transfer properties. In this work, we developed a facile approach by inducing a bifunctional molecule, β-alanine, into the SnO2 ETL, which can serve as a bridge to modulate the interfacial charge transfer and the perovskite crystallization kinetics. Benefited by the interfacial β-alanine, we grew a highly orientational perovskite layer that exhibited superior charge transport properties. Meanwhile, the β-alanine caused an intimate connection between the perovskite and SnO2 to enhance the interfacial charge transfer. As a result, the power conversion efficiency (PCE) of the β-alanine-modified device achieved a much-improved value of 19.67% and showed high reproducibility. This work provides a way for developing a high-performance ETL toward the scalable fabrication of highly efficient PSCs.
研究领域:
材料科学
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能源科学
✓ 已验证
DOI
高影响因子
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
·
2024
·Vol. 130
·期 11
·1-12
·
IF 2.5
Liu Hang,Tian Siye,Liu Yanchang,Liu Junlong,Qu Zhihao,Zhang Yuhong
In this paper, Zn 2 SnO 4 -SnO 2 -ZnO (ZSO) cubic nanomaterials are prepared by a hydrothermal method, and then ZSO composites with Au nanoparticles are prepared by a water bath heating method. The Au/ZSO nanomaterials are characterized by XRD, XPS, SEM and TEM. The results of XRD and XPS shows that the prepared samples have no other impurities, and also prove the existence of Au. The cubic structure of the sample was observed by SEM. The lattice spacings of Zn 2 SnO 4 , ZnO, SnO 2 and Au were calculated from TEM images. The gas sensing properties of pure ZSO and Au/ZSO nanocomposites are compared. At the optimum working temperature of 240 °C, the response of 3%Au/ZSO nanocomposite to 100 ppm triethylamine (TEA) is as high as 1595.5. Lower detection limit is as low as 3 ppm with a response value of 35.3. Importantly, this paper proposes an efficient method for preparing Au nanoparticles supported on ZSO and a gas sensor with high sensitivity response to TEA.
研究领域:
材料科学
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传感器技术
✓ 已验证
产品关联
DOI
高影响因子
ChemElectroChem
·
2017
·Vol. 4
·期 9
·2308-2313
·
IF 4.136
Ke Wang,Ying Huang,Xiulan Qin,Mingyue Wang,Xu Sun,Meng Yu
Graphical Stress relief : A facile two-step hydrothermal route is introduced to prepare hollow SnO 2 /SnS 2 hybrids. Subsequently, their electrochemical performances as anodes in Na-ion batteries are investigated. The as-prepared hollow SnO 2 /SnS 2 hybrids are composed of ultrafine SnS 2 nanosheets, which directly grow on the pre-grown hollow SnO 2 hollow spheres. In the structure, both the SnO 2 hollow structures and surrounding SnS 2 nanosheets are able to alleviate internal stress during sodiation/desodiation. Alloying-type Sn material has been considered as an excellent anode material for sodium-ion batteries (SIBs). However, the limitation of capacity is still a challenge that remains to be solved. In this approach, we introduce a facile two-step hydrothermal route to prepare hollow SnO 2 /SnS 2 hybrids and investigate their electrochemical performances as anodes in SIBs for the first time. Benefiting from their structural features, the hollow SnO 2 /SnS 2 hybrids exhibit a high reversible sodium storage capacity of about 485.64 mA h g −1 at 300 mA g −1 after 100 cycles with a capacity retention of 78.7 %, which is much higher than 25.9 % for bare SnO 2 hollow spheres and 28.5 % for bare SnS 2 nanosheets. Taking into consideration the outstanding performance and the special structural design, this work could provide a potential strategy to improve the electrochemical performances of tin-based electrodes, as well as that of other anodes in SIBs.
研究领域:
材料科学
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能源存储
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纳米技术
✓ 已验证
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2023
·Vol. 47
·期 14
·6789-6795
·
IF 3.3
Yu Wu,Yanqing Wang,Mengzhu Li,Zhaozhao Wang,Wenfei Wu,Huifang Song,Qingsha Liu,Chengwu Shi
An electron transport layer (ETL) is vital for extracting carriers in perovskite solar cells (PSCs). SnO2 with high electron mobility and excellent energy level matching with adjacent perovskites has been considered as an ideal electron transport material with excellent application prospects. However, some surface defects always exist on the SnO2 films prepared by a solution method, which will cause non-radiative recombination at the ETL/perovskite interface. Herein, an interfacial engineering strategy is adopted to eliminate the surface defects and improve the interface performance by modifying the SnO2 with ammonium polyacrylate (PANH4). After the PANH4 treatment, the interfacial defects of the SnO2/perovskite film were reduced significantly and the electron transport was effectively facilitated by the denser SnO2 layer, finally improving the power conversion efficiency (PCE) of PSCs. Besides, the grain size of the perovskite increases, simultaneously improving the stability of the device. As a result, the PCE of PSCs with an active area of 0.09 cm2 was increased from 18.91% to 20.70%.
研究领域:
材料科学
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能源技术
·
光伏器件
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）