JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
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IF 6.2
Weixue Yang,Jiaqi Zhao,Zhen Li,Jiayu Xin,Fei Li,Yu Wang
Introducing light energy into the charging/discharging process is an effective strategy to reduce the overpotential of Li−O 2 battery, which leads that the battery has higher energy conversion efficiency and better battery performance. However, the development has been hampered by the lack of suitable photocatalysts and cathode structure to accommodate the insoluble Li 2 O 2 . In order to overcome the aforementioned difficulties, a bifunctional photocatalyst α-Fe 2 O 3 /SnO 2 (FS) heterojunction was designed as the cathode to improve the charging/discharging overpotentials simultaneously. The photogenerated electrons and holes from FS participated in the oxygen reduction reaction (ORR) and oxygen revolution reaction (OER) under illumination, giving rise to an ultra-low charging/discharging overpotential of 0.01 V (energy efficiency up to 99.7%), which improved the electrochemical reaction kinetics of the Li−O 2 battery strikingly. In addition, the FS cathode exhibited excellent cycle stability under light (the battery energy efficiency can still maintain 80% after 252 cycles). The bifunctional catalyst designed in this paper has profoundly proved that the band engineering strategy can effectively utilize solar energy and provide important insights for understanding the mechanism of photo-assisted Li−O 2 battery.
研究领域:
材料科学
·
能源化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Sensors
·
2023
·
IF 8.9
Ping Li,Bingxi Feng,Youyou Feng,Guoxin Song,Xiaoli Cheng,Yonghui Deng,Jing Wei
Glutaraldehyde disinfectant has been widely applied in aquaculture, farming, and medical treatment. Excessive concentrations of glutaraldehyde in the environment can lead to serious health hazards. Therefore, it is extremely important to develop high-performance glutaraldehyde sensors with low cost, high sensitivity, rapid response, fabulous selectivity, and low limit of detection. Herein, mesoporous lanthanum (La) doped SnO2 spheres with high specific surface area (52–59 m2 g–1), uniform mesopores (with a pore size concentrated at 5.7 nm), and highly crystalline frameworks are designed to fabricate highly sensitive gas sensors toward gaseous glutaraldehyde. The mesoporous lanthanum-doped SnO2 spheres exhibit excellent glutaraldehyde-sensing performance, including high response (13.5@10 ppm), rapid response time (28 s), and extremely low detection limit of 0.16 ppm. The excellent sensing performance is ascribed to the high specific surface area, high contents of chemisorbed oxygen species, and lanthanum doping. DFT calculations suggest that lanthanum doping in the SnO2 lattice can effectively improve the adsorption energy toward glutaraldehyde compared to pure SnO2 materials. Moreover, the fabricated gas sensors can effectively detect commercial glutaraldehyde disinfectants, indicating a potential application in aquaculture, farming, and medical treatment.
研究领域:
材料科学
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环境科学
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医学检测
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Applied Materials Today
·
2025
·
IF 6.9
Hong Zhang,Bowen Li,Hao Xiong,Pengfei Liu,Kunyuan Zheng,Zening Lei,Peng Xiang,Xinyu Tan
Silica is widely utilized in perovskite solar cells owing to its tunable refractive index, exceptional optical transparency, and chemical stability, which collectively enhance light-harvesting efficiency, minimize reflection loss, and optimize light field distribution. However, the insulating nature of SiO 2 impedes charge transport, posing a challenge to the concurrent realization of antireflection and electrical modulation within the device. In this work, an island-like silica coating (ISC) was fabricated on the surface of SnO 2 , enabling synergistic antireflection and passivation effects. This architecture not only elevates the visible light transmittance of the electron transport layer but also effectively passivates interfacial defects, improves the uniformity of perovskite films, facilitates the growth of perovskite grains, and thereby significantly enhances device performance. Experimental results demonstrate that the ISC boosts the performance of formamidinium-based perovskite solar cells: the short-circuit current density increases from 24.61 mA·cm -2 to 25.85 mA·cm -2 , and the power conversion efficiency rises from 22.49 % to 24.43 %. Moreover, unencapsulated devices retain 90 % of their initial PCE after 30 days of storage in ambient air (humidity: 20 %–30 %, temperature: 25 °C) and maintain 86 % of their initial efficiency following 500 h of continuous maximum power point tracking testing in N 2 atmosphere. The ISC developed in this study offers a novel strategy for mitigating optical and electrical losses in perovskite solar cells.
研究领域:
材料科学
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光电子学
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纳米技术
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能源材料
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半导体器件
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表面工程
✓ 已验证
产品关联
DOI
高影响因子
Nano Energy
·
2018
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IF 13.12
Xingyue Liu,Xianhua Tan,Zhiyong Liu,Haibo Ye,Bo Sun,Tielin Shi,Zirong Tang,Guanglan Liao
All-inorganic CsPbBr 3 perovskite solar cells (PSCs) have attracted tremendous attentions in the photovoltaic field these days in view of their outstanding stability, especially thermal stability. However, the bromide-rich perovskite , such as CsPbBr 3 , always suffer from a low phase-purity and poor morphology synthesized by traditional two-step deposition route. Herein, we demonstrate a facile multistep spin-coating strategy to fabricate high-quality CsPbBr 3 films on the low-temperature processed compact TiO 2 ( c -TiO 2 ) electron transport layer (ETL) of the carbon-based PSCs. As-prepared films exhibit more homogeneous with higher CsPbBr 3 -phase purity and larger average grain sizes up to 1 µm, compared to those prepared through traditional two-step deposition process . The champion power conversion efficiency (PCE) of the planar CsPbBr 3 PSC is boosted from 7.05% to 8.12%, getting an increase by 15.2%, due to the increased crystallinity and light-harvesting ability as well as reduced trap states of the CsPbBr 3 film. To further enhance the device performance, a SnO 2 thin layer with much higher carrier mobility than TiO 2 is introduced to passivate the c -TiO 2 ETL. It is found that the SnO 2 layer can not only improve the surface morphology of the ETL, but also reduce the current shunting pathways in the c -TiO 2 . The TiO 2 /SnO 2 bilayered ETL possesses a superior electron extraction capability, beneficial to the charge transport and suppression of the interfacial trap-assisted recombination. The best-performing TiO 2 /SnO 2 -based CsPbBr 3 PSC delivers an excellent fill factor of 0.817 and a high PCE of 8.79%, which is the highest efficiency for planar CsPbBr 3 PSCs reported to date. More importantly, the unencapsulated all-inorganic PSCs show a promising humidity and thermal stability with no decline in efficiency when stored in ambient air at room temperature (25 °C) for over 1000 h and 60 °C for one month, respectively. Our work pave the ways for practical applications of cost-effective, highly efficient and stable all-inorganic PSCs.
研究领域:
材料科学
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能源科学
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光伏技术
✓ 已验证
DOI
高影响因子
PHYSICA B-CONDENSED MATTER
·
2025
·
IF 2.8
Yecheng Liang,Jianchun Qin,Shunyan Ning,Jishu Zeng,Zheyu He,Jianing Xu,Kangcheng Chen,Jun Cai,Weilong Zhong,Long Hu,Yimin Li
Ethanol gas detection is vital for industrial processes like brewing and biofuel production, and for safety in medical and transportation systems. However, the response and selectivity of tin dioxide (SnO 2 ) towards ethanol gas still exhibit serious limitations at relatively low temperatures. In this study, the porous Ag-SnO 2 composites were successfully synthesized by using sacrificial carbon nanotubes (CNTs) template-assisted hydrothermal synthesis, enhancing the sensitivity and selectivity towards ethanol gas. Specifically, Ag-SnO 2 nanoparticles were uniformly grown on the surface of CNTs via a hydrothermal method, followed by calcination to remove the CNTs, and obtained porous Ag-SnO 2 composites. The composites demonstrated excellent ethanol sensing characteristics: high response magnitude, excellent selectivity, good stability, and wide detection concentration range. The porous structure significantly increased surface area and gas adsorption of SnO 2 , while Ag doping enhanced surface catalytic activity. This work provides a promising approach for designing high-performance, low-temperature SnO 2 -based ethanol sensors.
研究领域:
材料科学
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传感器与传感技术
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纳米材料
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气体检测
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Sensors
·
2025
·
IF 9.1
Huiyu Su,Chaofan Ma,Chaoqi Zhu,Jiahong Tang,Lingfei Luo,Kechen Zhou,Xiaoxia Wang,Dawen Zeng
Conventional metal oxide sensors often lack sufficient sensitivity due to limited adsorption sites. Loading clusters is an effective surface-modification strategy. In this work, CuO clusters of approximately 3 nm were highly dispersed on high-surface-area SnO2 nanoboxes. TEM confirmed the cluster sizes and dispersion degrees of the CuO clusters, while Raman and XPS collectively confirmed that CuO modifies the electronic structure of the SnO2 support and induces the formation of new oxygen vacancies. The optimized Cu/SN-2 sensor exhibited a response of 39.25 toward 10 ppm ethyl methyl carbonate (EMC) at 130 °C, which is 1.92 times higher than that of SnO2 nanoboxes (20.46 at 140 °C). The diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) indicated that CuO lowers the activation energy for EMC decomposition, producing intermediates like CO2, methanol, and ethanol at lower temperatures, thus reducing the sensor operating temperature. The density functional theory (DFT) calculations confirmed that Cu sites act as negatively charged centers, promoting EMC adsorption and enhancing sensitivity. This work offers a simple, low-cost surface modification route to improve gas sensing. Furthermore, as EMC is a common electrolyte in lithium-ion batteries, its leakage poses safety risks. Integrating such EMC sensors into battery safety systems can enable ultraearly leak warnings, helping prevent fires and explosions.
研究领域:
材料科学
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气体传感技术
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电化学
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纳米材料
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储能安全
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL PHYSICS LETTERS
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2020
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IF 2.029
Liqun Cheng,Qinghua Tian
Herein, the improvement in the electrochemical properties of the SnO 2 anode has been demonstrated through constructing flexible carbon nanoribbons supporting and extra carbon anchoring. And the as-constructed SnO 2 -based composite has been studied by XRD, Raman, TEM, and XPS characterizations. The obtained results indicate that the rutile phase SnO 2 nanoparticles are anchored on 3D carbon nanoribbons by an extra amorphous carbon. As a result, this composite shows superior electrochemical properties with high capacities of 794 and 510 mAh g −1 at 200 and 1000 mA g −1 even after 500 and 1000 cycles, respectively, exhibiting great promise for a progressive LIB anode material.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2026
·
IF 9.2
Wenyuan Yang,Limin Qiu,Xintong Liu,Tingting Wang,Tianqi Wang,Dan Li,Hui Yu,Ying Yang
The development of portable, low-power H 2 S sensors is critical for environmental safety but remains challenged to balance high sensitivity with mechanical flexibility at room temperature. Herein, we present a hierarchical SnO 2 /SnS 2 nanoflower composite synthesized via a facile in-situ sulfidation strategy, which ensures intimate lattice coherence for robust flexible sensing. The optimal sensor on a PET substrate exhibits a high response of 19.01 to 10 ppm H 2 S at 25 °C, a low theoretical detection limit of 95.38 ppb, and excellent mechanical stability under 90° bending. Mechanistically, Mott-Schottky analysis confirms that SnO 2 /SnS 2 heterojunctions induce a 50-fold increase in carrier concentration. This electronic modulation extends the Debye length (24.4 nm) beyond the average crystallite size (16.9 nm), creating a volume depletion state in ambient air that enables massive resistance modulation upon H 2 S exposure. This work demonstrates a robust flexible sensor and establishes a quantitative criterion for heterojunction design through Debye length engineering.
✓ 已验证
产品关联
DOI
高影响因子
SOLAR ENERGY MATERIALS AND SOLAR CELLS
·
2022
·
IF 7.305
Linlin Qiu,Deqiang Mei,Wei-Hsiang Chen,Yongfeng Yuan,Lixin Song,Liang Chen,Bing Bai,Pingfan Du,Jie Xiong
SnO 2 is one of the most popular low-cost inorganic electron transport materials for perovskite solar cells . However, the agglomeration of SnO 2 nanoparticles causes their uneven distribution and the existence of pinholes, seriously hindering the electron migration across SnO 2 /perovskite interface and limiting the device performance. The poor wettability between the SnO 2 film and the perovskite precursor solution also impairs the growth of perovskite grains. In this work, an innovative strategy was employed to produce an organic-inorganic hybrid electron transport layer (ETL) by fabricating a high-quality polyvinylpyrrolidone (PVP)/SnO 2 perovskite film with few defects and good wettability. In turn, a PVP-SnO 2 based device exhibits elevated power conversion efficiency (PCE) (18.98%) and adequate reproducibility along with superior operational stability.
研究领域:
材料科学
·
光伏技术
·
纳米技术
·
能源材料
✓ 已验证
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2022
·
IF 9.221
Yi Xia,Lei Xu,Sufang He,Liexing Zhou,Mingjun Wang,Jing Wang,Sridhar Komarneni
2D Transition metal dichalcogenide (TMDs) has been recognized as a potential candidate for constructing wearable and safe room temperature gas sensor. Especially, the heterostructures of TMDs/ metal oxide semiconductors (MOS) have been proved to be potential candidates as NO 2 sensors at room temperature. However, the response/recovery rate and reversibility of the sensors is still not satisfactory due to the inefficient charge transfer on TMDs/MOS hetero-interface. In this study, SnO 2 quantum dots (QDs) were simply decorated on the surface of few or single layer WS 2 nanosheets to form 2D/0D heterostructures via a facile room temperature aqueous solution process and self-assembly method. The 2D/0D WS 2 /SnO 2 heterostructure-based optoelectronic gas sensor showed fast response/recovery rates and full reversibility to NO 2 at room temperature with enhanced response. The remarkable improvement in NO 2 sensing was because of the efficient interfacial charge separation rendered by 2D/0D heterostructures under ultraviolet illumination. Therefore, this study points out a potential strategy for the design of light-enhanced gas sensing materials.
研究领域:
材料科学
·
纳米科技
·
传感器技术
·
半导体物理
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环境监测
·
光电子学
✓ 已验证
DOI
高影响因子
Materials Today Chemistry
·
2023
·
IF 7.3
S. Tian,X. Cheng,H. Li,M. Wang,X. Wang
Transition metal oxides are regarded as the prospective anode materials for next-generation sodium-ion batteries owing to their high theoretical capacity. Nevertheless, its low conductivity and large volume variation obstruct its practical applications. In this study, a design of heterostructured SnO 2 /SnSe 2 nanoparticles encapsulated by a carbon shell (C/SnO 2 /SnSe 2 @C) synthesized through a templating method and in-situ gas-phase selenization process. The rich heterostructures and the interfacial effect induced by a built-in electric field significantly accelerate reaction kinetics and enhance the reaction activity. When employed as an anode for sodium-ion batteries , C/SnO 2 /SnSe 2 @C electrodes achieve a superior rate performance (238.4 mAh/g at 5.0 A/g) and cycling performance (422.3 mAh/g at 0.1 A/g after 150 cycles; 289.7 mAh/g at 1.0 A/g after 200 cycles). A quantitative examination into the origin demonstrated that the Na + storage is dominated by the fast surface redox reaction , which endows the heterostructure with a durable rate performance. Moreover, based on a dQ/dV analysis and in situ X-ray diffraction results, the C/SnO 2 /SnSe 2 @C anode has a hybrid mechanism of SnO 2 (conversion and alloying reaction) and SnSe 2 (intercalation, conversion, and alloying reactions). This strategy of the heterostructure design provides a potential route to develop high-performance sodium-ion storage materials and sheds light on the behavior of Na-storage mechanisms.
研究领域:
材料科学
·
电化学
·
纳米材料
·
能源存储
·
固态化学
·
界面科学
·
电池技术
✓ 已验证
DOI
高影响因子
MATERIALS RESEARCH BULLETIN
·
2013
·
IF 1.913
Peng Dai,Lili Zhang,Guang Li,Zhaoqi Sun,Xiansong Liu,Mingzai Wu
Different loadings of SnO 2 nanoparticles embedded in mesoporous silica (SBA-15) were prepared via a two-solvent method with the ordered hexagonal mesoporous structure of SBA-15 kept. X-ray diffraction, transmission electron microscope, X-ray photoelectron spectroscopy and N 2 adsorption porosimetry were employed to characterize the nanocomposites. Compared with pure SnO 2 nanoparticles, the SnO 2 /SBA-15 nanocomposites show higher response to H 2 at lower operating temperature. The photocatalytic activity of as-prepared SnO 2 /SBA-15 for degradation of methylene blue was investigated under UV light irradiation and the results show that the SnO 2 /SBA-15 nanocomposites have higher photodegradation ability toward methylene blue than pure SnO 2 nanoparticles.
研究领域:
材料科学
·
纳米科技
·
环境催化
·
传感器技术
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）