NANOTECHNOLOGY
·
2024
·Vol. 35
·期 37
·375401
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IF 2.9
Along Cui,Suolan Liu,Shiqi Hong,Haiyan Li,Lin Wang,Songwang Yang
Flexible perovskite solar cells (f-PSCs) have achieved significant success. However, high-quality tin dioxide (SnO2) electron transport layers (ETLs) fabricated via chemical bath deposition (CBD) have not been achieved on flexible PEN/ITO substrates. This limitation is primarily due to the corrosion of the poor-quality ITO layer by the strongly acidic CBD solution. Here, we analyzed the reasons for the poor corrosion resistance of ITO films on PEN substrate from multiple perspectives, such as element composition, microstructure, and crystallinity. Then, we proposed a modified CBD method for SnO2 films suitable for flexible PEN/ITO substrates. We employed SnCl2·2H2O as the tin source and regulated the pH of the CBD solution by NH3·H2O, which effectively avoided the corrosion of the ITO layer by the CBD solution and achieved high-quality SnO2 films on the ITO layers. Compared to the commercial SnO2 dispersion, the SnO2 films prepared by this method have smaller grains and higher transmittance. As a result, we achieved an unprecedented power conversion efficiency (PCE) of 20.71% for f-PSCs fabricated on PEN/ITO substrates with SnO2 ETLs by CBD method. This breakthrough facilitates the development of high-performance f-PSCs by a low-cost and large-scale chemical bath deposition of high-quality ETLs on flexible substrates.
研究领域:
材料科学
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能源技术
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光电材料
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DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2017
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IF 3.582
Bozhen Wu,Guohua Li,Faqian Liu
Combine SnO 2 nanoparticles with some conductive carbonaceous materials has been regarded as one of the most effective strategies to solve the problems of poor conductivity and volume change. In this work, a SnO 2 /sulfonated graphene composite with 3D interpenetrating porous structure (3D SnO 2 /SG) was synthesized. The elaborate designed 3D SG structure not only generates an excellent electronic conductivity , but also buffers the volume expansion of the SnO 2 particles. As a result, the desirable 3D possesses enhanced performance when used as anode material in lithium battery . For example, the electrochemical results showed that the 3D SnO 2 /SG presents a high reversible specific capacity (928.5 mA h g −1 at the current density of 200 mA g −1 ). Even after 120 cycles, the specific capacity of 679.7 mA h g −1 (at the current density of 400 mA g −1 ) are still maintained.
研究领域:
材料科学
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能源存储
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产品关联
DOI
高影响因子
RSC Advances
·
2014
·Vol. 4
·期 101
·57869-57874
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IF 3.708
Jinzuan Wang,Ping Liu,Yanshan Huang,Jianzhong Jiang,Sheng Han,Dongqing Wu,Xinliang Feng
Two-dimensional graphene/SnO2/graphene (G/SnO2/G) hybrids with SnO2 nanoparticles sandwiched in graphene sheets have been constructed by a facile ionic self-assembly process. The resulting G/SnO2/G hybrids possessed flexible and ultrathin graphene shells that effectively enwrapped the SnO2 nanoparticles. When the hybrids were used as the anode materials in lithium-ion batteries (LIBs), their unique core–shell architecture provided double protection against the aggregation and volume changes of SnO2 nanoparticles, and ensured favorable transport kinetics for charge carriers. As a result, the hybrids exhibited a superior cycling stability (600 mA h g−1 over 60 cycles) and excellent rate capability (120 mA h g−1 at 5.0 A g−1).
研究领域:
材料科学
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能源技术
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2016
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IF 4.758
Ying Wang,Zhenting Zhao,Yongjiao Sun,Pengwei Li,Jianlong Ji,Yong Chen,Wendong Zhang,Jie Hu
Pristine tin dioxide (SnO 2 ) and Au-loaded SnO 2 composite nanoparticles were synthesized by a simple hydrothermal method. The phase structure, composition, and morphology of synthesized Au-loaded SnO 2 composite nanoparticles were comprehensively investigated. Furthermore, the gas sensing performance of the as-prepared pristine and Au-loaded SnO 2 gas sensors toward low concentration of hydrogen (H 2 ) were systematically evaluated. The results indicated that compared to the pristine SnO 2 gas sensor, the Au-loaded SnO 2 composite nanoparticles could not only significantly improve the gas sensing response, but also decrease the optimum working temperature. Moreover, the experimental results showed that the 4.0 at.% Au-loaded SnO 2 gas sensor exhibited the highest response (25) to 100 ppm H 2 at 250 °C, which was about five times higher than that of the pristine one. In addition, it also provided a rapid response/recovery time (1 s/3 s) and a low detection limit (1 ppb). Therefore, Au-loaded SnO 2 composite nanoparticles are more suited for hydrogen detection compared to pristine SnO 2 gas sensor.
研究领域:
材料科学
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化学工程
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产品关联
DOI
高影响因子
Nature Communications
·
2018
·Vol. 9
·期 1
·1-10
·
IF 12.353
Bu Tongle,Li Jing,Zheng Fei,Chen Weijian,Wen Xiaoming,Ku Zhiliang,Peng Yong,Zhong Jie,Cheng Yi-Bing,Huang Fuzhi
Perovskite solar cells (PSCs) have reached an impressive efficiency over 23%. One of its promising characteristics is the low-cost solution printability, especially for flexible solar cells. However, printing large area uniform electron transport layers on rough and soft plastic substrates without hysteresis is still a great challenge. Herein, we demonstrate slot-die printed high quality tin oxide films for high efficiency flexible PSCs. The inherent hysteresis induced by the tin oxide layer is suppressed using a universal potassium interfacial passivation strategy regardless of fabricating methods. Results show that the potassium cations, not the anions, facilitate the growth of perovskite grains, passivate the interface, and contribute to the enhanced efficiency and stability. The small size flexible PSCs achieve a high efficiency of 17.18% and large size (5 × 6 cm 2 ) flexible modules obtain an efficiency over 15%. This passivation strategy has shown great promise for pursuing high performance large area flexible PSCs.
研究领域:
材料科学
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可再生能源
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太阳能电池技术
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
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2015
·
IF 2.947
Chuande Huang,Xiaodong Wang,Xin Liu,Ming Tian,Tao Zhang
In this paper, the phase evolution, microstructure changes, and element diffusion for the formation of BaSnO 3 from BaCO 3 and SnO 2 were extensively investigated. It was found that BaCO 3 rapidly diffused on surface of SnO 2 at the initial stage of the reaction (approximately 700 °C), forming a uniform BaSnO 3 shell. Subsequently, BaSnO 3 grew via two different routes depending on the calcination temperature. When the reaction was carried out below 820 °C, BaSnO 3 phase further grew by diffusion of barium ions across BaSnO 3 layer to SnO 2 phase, since the BaSnO 3 interlayer prevented the direct reaction between surface BaCO 3 and SnO 2 core. Once a higher temperature above 820 °C was provided, Ba 2 SnO 4 were generated by reaction between BaCO 3 and BaSnO 3 shell. Under such circumstances, pure BaSnO 3 was obtained by diffusion of barium ions from Ba 2 SnO 4 across BaSnO 3 to SnO 2 . The rate-determining step in both cases was assigned to the diffusion of barium ions.
研究领域:
材料科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
AIP Advances
·
2018
·Vol. 8
·期 12
·
IF 1.653
Lian Yadong,Huang Xiaokun,Yu Ji,Tang Tong B.,Zhang Weiyi,Gu Min
Scrutinyite SnO 2 was synthesized by annealing SnO nanoparticles fabricated from micron-size SnO via ball milling. The isotropic as well as anisotropic chemical shifts of 119 Sn obtained by solid-state nuclear magnetic resonance method, were verified computationally using a pseudopotential method in density-functional theory. The results fit with 6-fold coordinated Sn. A linear relationship holds empirically between isotropic shift and coordination number divided by Sn-O average bond length in all polymorphs of tin oxides. When the annealing proceeded in an oxygen-free atmosphere, metallic tin, the rutile phase of SnO 2 and oxygen vacancies associated with permanent electric dipoles were also detected by thermal analysis and dielectric spectroscopy.
研究领域:
材料科学
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物理学
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产品关联
DOI
高影响因子
VACUUM
·
2022
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IF 4.11
Peng Su,Wei Li,Jie Zhang,Xiaoling Xie
Detecting some appropriate target gases through the optimization of material structure is still applicable to some old sensing materials. In this work, we showed that hollow tin oxide (SnO 2 ) nanotubes (NTs) exhibited a remarkable sensing performance for nitric oxide (NO) at 160 °C. The sensing materials were prepared by direct annealing of electrospun precursor nanofibers , and hollow NTs can be obtained at an appropriate heating rate of 6 °C/min. Given the large surface area of hollow SnO 2 NTs, their sensing performance is better than that of solid SnO 2 NTs. The response of hollow SnO 2 NTs is approximately 33.3 upon exposure to 500 ppb of NO at 160 °C. The hollow SnO 2 NTs also exhibit good repeatability, long-term stability, and excellent selectivity . These remarkable sensing properties indicate that conventional SnO 2 still has great practical applications because of the fine design of the material structure and proper control of working conditions.
研究领域:
材料科学
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化学工程
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产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2022
·Vol. 32
·期 26
·2200817
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IF 19.924
Jun-Xing Zhong,Wu-Qiang Wu,Yecheng Zhou,Qingshun Dong,Pengfei Wang,Hongru Ma,Zhiyong Wang,Chan-Ying Yao,Xi Chen,Geng-ling Liu,Yantao Shi,Dai-Bin Kuang
Room temperature-processed electron transport layers (RT-ETLs) demonstrate vast potential to be used in fabricating high-performance flexible perovskite solar cells (PSCs) in an energy-saving manner. However, the RT-ETL normally suffers from inferior crystallinity, mismatched energy level, and high surface trap-state density, which would result in under-optimized interfacial electron extraction and undesirable interfacial charge recombination at ETL/perovskite interface, thus limiting the device performance. Herein, a novel strategy is demonstrated to prepare annealing-free RT-ETL based on precrystalline metal ion-modified SnO 2 nanocrystals, which perfectly optimizes the interfacial energy level alignment between ETL and perovskite layer, achieving nearly zero-barrier charge transfer at the interface. As a result, the charge extraction has been remarkably accelerated and the interfacial charge recombination has been largely suppressed, leading to a ≈26% enhancement in device efficiency. The best-performing flexible PSCs achieve efficiencies up to 19.3%, accompanied by outstanding mechanical strength under repeated bending cycle tests, which, to the best of the knowledge, is one of the highest reported values for the flexible perovskite photovoltaics fabricated with RT-ETLs.
研究领域:
材料科学
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能源技术
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产品关联
DOI
高影响因子
Nanomaterials
·
2022
·Vol. 12
·期 24
·4464
·
IF 5.719
Baohui Zhang,Chong Li,Min Li,Chen Fu,Ran Tao,Honglang Li,Jingting Luo
Nitrogen dioxide is one origin of air pollution from fossil fuels with the potential to cause great harm to human health in low concentrations. Therefore, low-cost, low-power-consumption sensors for low-concentration NO2detection are essential. Herein, heterojunction by SnO2quantum wires, a traditional metal oxide NO2sensing material, and Ti3C2TxMXene, a novel type of 2D layered material, was synthesized using a simple solvothermal method for enhancing gas-sensing performance and reducing operating temperature. The operating temperature was reduced to 80 °C, with a best performance of 27.8 and a fast response and recovery time (11 s and 23 s, respectively). The SnO2and Ti3C2TxMXene composite exhibits high speed and low detection limit due to the construction of the heterojunction with high conductive Ti3C2TxMXene. The selectivity and stability of gas sensors are carried out. This could enable the realization of fast response, high-sensitivity, and selective NO2sensing under low operating temperatures.Keywords:Ti3C2TxMXene;SnO2;gas sensor;NO2;nanocomposite
研究领域:
材料科学
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环境科学
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产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Xu Yin,Wei Li,Hongwei Zhu,Jiatian Yu,Kajia Wei,Zhifeng Gao,Yonghao Zhang,Haoming Chen,Liankai Gu,Weiqing Han
With the wide application of reverse osmosis technology in municipal wastewater treatment, the abundance of generated reverse osmosis concentrates (ROC) has become a significant challenge for water ecosystems. In this work, a fabricated TiO 2 -BNTs/SnO 2 -Sb reactive electrochemical membrane (REM) was used to dispose of municipal ROC wastewater. The effects of the TiO 2 nanotube array (TiO 2 -BNTs) interlayer, current density, initial pH and flow rate on the COD removal of ROC were investigated. In addition, the 3D-EEM fluorescence spectra showed that humic acid-like substances and soluble microbial byproduct-like substances could be removed effectively. GC-MS analysis indicated that most organics, including aldehydes, phenols, ethers, nitriles, ketones, silanes and alcohols, were eliminated after treatment. The REM also exhibited prominent membrane anti-fouling performance in high-salinity wastewater. After 20 cycles, the transmembrane pressure (TMP) was only slightly changed (within 3 kPa) compared to that of the first cycle. Two key parameters, i.e., service lifetime and energy consumption, were investigated in ROC treatment. The service lifetime reached 31350 h (3.5 years, 20 mA cm −2 ) in 0.5 M NaCl solution and 40390 h (20 mA cm −2 , 4.6 years) in actual wastewater, which is highly competitive with previously reported electrodes. Energy consumption reached 10.5 kWh·kg COD −1 in actual ROC wastewater, which is more acceptable compared with current reported electrochemical technologies and exhibits great application prospects for TiO 2 -BNTs/SnO 2 -Sb REMs.
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
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
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产品关联
DOI
高影响因子
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