JOURNAL OF MATERIALS SCIENCE
·
2025
·
IF 3.9
Li Siyuan,Li Liyun,Liu Xu,Wang Yanlai,Wang Ligang
To address the high cost and scarcity of traditional platinum (Pt) counter electrodes, this study designed a novel non-Pt counter electrode material: nitrogen-doped hollow mesoporous carbon sphere (NCS)-loaded SnS 2 @SnO 2 heterojunctions (SnS 2 @SnO 2 /NCSs). By optimizing the mass ratio of Sn/S precursors to NCSs, the morphology of the composite was tailored. Comprehensive characterization via XRD, XPS, SEM, TEM, and Raman spectroscopy revealed that SnS 2 @SnO 2 nanoparticles (10–20 nm) were uniformly distributed within the internal/external walls and cavities of the NCSs via mesoporous confinement, forming a 3D conductive network. Nitrogen doping (I D /I G = 1.12) endowed the carbon matrix with abundant active sites, while the band alignment of the SnS 2 @SnO 2 heterojunction significantly enhanced catalytic activity. Electrochemical tests demonstrated a charge transfer resistance (R ct = 22.25 Ω·cm 2 ) close to Pt (15.78 Ω·cm 2 ), with reduced low-frequency diffusion impedance. When integrated into dye-sensitized solar cells (DSSCs), the SnS 2 @SnO 2 /NCSs-based device achieved a power conversion efficiency (PCE) of 7.32% (J sc = 17.23 mA·cm⁻ 2 , V oc = 737.46 mV, FF = 0.57), representing a 36% improvement over the pure heterojunction (5.38%) and approaching Pt-based devices (8.39%). This work provides a cost-effective strategy for developing high-performance non-Pt counter electrodes.
研究领域:
材料科学
·
纳米技术
·
电化学
·
可再生能源
✓ 已验证
产品关联
DOI
高影响因子
Carbon Energy
·
2024
·
IF 19.5
Yuanyuan Zhao,Lei Gao,Qiurui Wang,Qiang Zhang,Xiya Yang,Jingwei Zhu,Hao Huang,Jialong Duan,Qunwei Tang
Suppressing nonradiative recombination and releasing residual strain are prerequisites to improving the efficiency and stability of perovskite solar cells (PSCs). Here, long-chain polyacrylic acid (PAA) is used to reinforce SnO 2 film and passivate SnO 2 defects, forming a structure similar to “reinforced concrete” with high tensile strength and fewer microcracks. Simultaneously, PAA is also introduced to the SnO 2 /perovskite interface as a “buffer spring” to release residual strain, which also acts as a “dual-side passivation interlayer” to passivate the oxygen vacancies of SnO 2 and Pb dangling bonds in halide perovskites. As a result, the best inorganic CsPbBr 3 PSC achieves a champion power conversion efficiency of 10.83% with an ultrahigh open-circuit voltage of 1.674 V. The unencapsulated PSC shows excellent stability under 80% relative humidity and 80°C over 120 days.
研究领域:
材料科学
·
太阳能
·
纳米技术
✓ 已验证
DOI
高影响因子
CHEMISTRY-A EUROPEAN JOURNAL
·
2011
·Vol. 17
·期 35
·9708-9719
·
IF 5.476
Wei Wu ,Shaofeng Zhang ,Juan Zhou ,Xiangheng Xiao ,Fen Ren ,Changzhong Jiang
Graphical Shape and size control of sub-100 nm SnO 2 hollow nanostructures, such as the depicted hollow nanospheres, was achieved by a mild template- and surfactant-free hydrothermal route starting from potassium stannate and urea in ethylene glycol/water. Precise control of morphology and size is possible by varying reaction parameters, such as reaction time, urea concentration, and reaction temperature. Controlled synthesis of low-dimensional materials, such as nanoparticles, nanorods, and hollow nanospheres, is vitally important for achieving desired properties and fabricating functional devices. We report a systematic investigation of the growth of low-dimensional sub-100 nm SnO 2 hollow nanostructures by a mild template- and surfactant-free hydrothermal route, aiming to achieve precise control of morphology and size. The starting materials are potassium stannate and urea in an ethylene glycol (EG)/H 2 O system. We found the size of the SnO 2 hollow nanospheres can be controlled by simply adjusting the urea concentration. Investigation of the mechanism of formation of the SnO 2 hollow nanospheres revealed that reaction time, urea concentration, and reaction temperature make significant contributions to the growth of hollow nanospheres. On switching the solvent from EG/H 2 O to H 2 O or ethanol, the SnO 2 nanostructures changed from nanospheres to ultrafine nanorods and nanoparticles. On the basis of reaction parameter dependent experiments, oriented self-assembly and subsequent evacuation through Ostwald ripening are proposed to explain the formation of hollow nanostructures. Their size-dependent optical properties, including UV/Vis absorption spectra and room-temperature fluorescence spectra, were also studied. Moreover, the studies on the photocatalytic property demonstrate that the fabricated hollow structures have slightly enhanced photocatalytic degradation activity for rhodamine B when exposed to mercury light irradiation compared to solid SnO 2 nanospheres under the same conditions. The synthesized tin oxide nanoparticles display high photocatalytic efficiency and have potential applications for cleaning polluted water in the textile industry.
研究领域:
材料科学
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纳米技术
·
化学工程
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2020
·
IF 6.155
Liquan Yao,Limei Lin,Hui Liu,Fengying Wu,Jianmin Li,Shuiyuan Chen,Zhigao Huang,Guilin Chen
Antimony chalcogenide Sb 2 (S, Se) 3 is attracting a lot of attention as photovoltaic absorber owing to its rewarding photoelectric properties, low toxicity, and earth abundance. However, its device efficiency is still limited by the absorber material quality and device interface recombination. In this work, a fluorine-doped tin oxide (FTO) substrate with ultra-thin SnO 2 layer and a low-cost stabilized carbon paste are introduced as a front and back contact layer respectively in Sb 2 (S, Se) 3 based planar solar cells. Over 5.2 % efficiency is demonstrated in the structure of FTO/SnO 2 /CdS/Sb 2 (S, Se) 3 /Carbon/Ag, where the Sb 2 (S, Se) 3 is prepared by hydrothermal technique. The complementary device physics characterizations reveal that the interfacial recombination between TCO and CdS is significantly suppressed by the introduction of ultra-thin SnO 2 layer, which is profited from the leakage protection and bandgap offset engineering by its high resistivity and suitable conduction band minimum. Meanwhile, the successful adoption of the low-cost stabilized carbon as a back contact here shows an enormous potential to replace the conventional organic hole transport materials and noble metal. We hope this work can provide positive guidance to optimize Sb 2 (S, Se) 3 based planar solar cells in the future.
研究领域:
材料科学
·
光伏技术
·
可再生能源
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2020
·
IF 7.489
Kun Wei,Xiu Yun Gu,En Zi Chen,You Qing Wang,Zhe Dai,Zi Ran Zhu,Shi Qiang Kang,Ao Chen Wang,Xiu Ping Gao,Geng Zhi Sun,Xiao Jun Pan,Jin Yuan Zhou,Er Qing Xie
SnO 2 /TiO 2 type II heterojunctions are often introduced to enhance the separation efficiency of photogenerated carriers in photoelectrochemical electrodes, while most of these heterojunctions are of core–shell structure, which often limits the synergistic effect from the two components. In this work, dissymmetric SnO 2 /TiO 2 side-by-side bi-component nanofibers (SBNFs) with tunable composition ratios have been prepared by a novel needleless electrospinning technique with two V-shape connected conductive channels (V-channel electrospinning). Results show that this V-channel electrospinning technique is more stable, controllable and tunable for the large-scale preparation of SBNF materials compared to the traditional electrospinning using two side-by-side metal needles. And these SnO 2 /TiO 2 SBNFs are dissymmetric and comprised of a tiny SnO 2 NF (tunable diameter within 20–80 nm) and a Sn-doped TiO 2 NF (diameter of ~ 250 nm) with a side-by-side structure. Moreover, the dye-sensitized solar cells (DSSCs) based these dissymmetric SnO 2 /TiO 2 SBNFs show the maximum power conversion efficiency (PCE) of 8.3%, which is 2.59 times that of the ones based on the TiO 2 NFs. Series of analyses indicate that the enhancements in PCE could mainly be due to the improved electron transport via SnO 2 NFs and the enhanced carrier separation via dissymmetric SnO 2 /TiO 2 heterojunction interface. This research will give some new insight in the preparation of SBNFs for high-performance photoelectrochemical devices.
研究领域:
材料科学
·
能源技术
·
光电化学
✓ 已验证
DOI
高影响因子
MOLECULES
·
2025
·Vol. 30
·期 15
·3203
·
IF 4.6
Yue Yan,Bingxian Zhu,Zhengzheng Xia,Hui Wang,Weijuan Xu,Ying Xin,Qingshan Zhao,Mingbo Wu
The widespread adoption of sodium-ion batteries (SIBs) remains constrained by the inherent limitations of conventional anode materials, particularly their inadequate electronic conductivity, limited active sites, and pronounced structural degradation during cycling. To overcome these limitations, we propose a novel redox engineering approach to fabricate oxygen-vacancy-rich SnO2dots anchored on reduced graphene oxide (rGO), which are encapsulated within N-doped carbon nanofibers (denoted as ov-SnO2/rGO@N-CNFs) through electrospinning and subsequent carbonization. The introduction of rich oxygen vacancies establishes additional sodium intercalation sites and enhances Na+diffusion kinetics, while the conductive N-doped carbon network effectively facilitates charge transport and mitigates SnO2aggregation. Benefiting from the well-designed architecture, the hierarchical ov-SnO2/rGO@N-CNFs electrode achieves remarkable reversible specific capacities of 351 mAh g−1after 100 cycles at 0.1 A g−1and 257.3 mAh g−1after 2000 cycles at 1.0 A g−1and maintains 177 mAh g−1even after 8000 cycles at 5.0 A g−1, demonstrating exceptional long-term cycling stability and rate capability. This work offers a versatile design strategy for developing high-performance anode materials through synergistic interface engineering for SIBs.
研究领域:
材料科学
·
能量存储
·
电化学
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2022
·
IF 5.518
Guangzhi Yang,Chenkai Cao,Haoran Zhong,Yu Cheng,Wenhui Zhang,Ding Wang
As a typical pollution gas , xylene poses a particularly serious threat to human health. The xylene sensors with low operating temperature, fast response speed, sufficient detection limit and satisfactory selectivity are required for safety protection. Herein, a novel xylene sensitive material (SnO 2 @MoS 2 ) was constructed by self-assembling MoS 2 nanosheets array on SnO 2 nanofibers . The response of SnO 2 @MoS 2 sensor was 23.5–100 ppm xylene vapor, which was much higher than that of single-component sensors. Additionally, the response/recovery times were 21.5/60.4 s with a limit of detection (LOD) as low as 0.5 ppm. The good sensitive was ascribed to the unique resistance characteristics of the hierarchical structure, the regulation of electronic property by heterojunctions , and the increase of adsorption sites caused by large specific surface areas and surface defects . This work enlightens a novel strategy on the construction of MoS 2 based core-shell hierarchical nanomaterials and future development of high efficiency xylene sensor.
研究领域:
材料科学
·
纳米技术
·
环境科学
·
传感器技术
✓ 已验证
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2025
·
IF 19
Mengxin Liu,Chen Lin,Haowei Li,Jiejun Pan,Yuhui Liu,Xin Su,Xinan Shi,Heng Zhang,Bingsuo Zou,Daocheng Pan
SnO 2 nanoparticles (NPs) have emerged as a promising electron transport material (ETL) for high-performance and stable quantum dot light-emitting diodes (QLEDs). However, their inherently high electron mobility and conductivity create a charge transport imbalance in QLEDs, ultimately limiting device performance. To address this challenge, a novel p-type doping strategy is proposed to continuously decrease the electron mobility and conductivity of SnO 2 NPs. As a result, the electron mobility and conductivity of Zn-doped SnO 2 NPs can be adjusted in a wide range owing to the substitution of Zn 2+ ions for Sn 4+ ions as the electron acceptors. The charge transportation balance in QLEDs can be realized by suppressing the electron transportation ability of Zn-doped SnO 2 nanocrystals and inserting a wide-band-gap CaMoO 4 interface layer. Finally, QLED devices achieve an average external quantum efficiency (EQE) of 24.4% and a highest EQE of 27.1%, which are comparable to the state-of-the-art ZnO-based QLEDs. More importantly, the positive aging effect can be eliminated by using Zn-doped SnO 2 NPs as ETL, which provides a promising ETL material for the fabrication of high-efficiency and stable QLEDs without positive aging effect.
研究领域:
材料科学
·
纳米技术
·
光电子学
·
半导体器件
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2024
·
IF 8
Jianwang He,Hu Meng,Xiaoxin Wang,Yan Xu,Liang Feng
Hexafluoroethane (CF 3 CF 3 ) is a significant greenhouse gas and a potential threat to the environment as emissions increase. However, there is no simple and effective method to detect CF 3 CF 3 yet. Hence, we first attempted to use metal oxide semiconductor (MOS) gas sensors for CF 3 CF 3 detection. Pristine SnO 2 and S-doped SnO 2 (1–3, representing different S contents) nanoparticles were synthesized. S elements successfully doped into the crystal structure of SnO 2 . The optimized sensor (S-SnO 2 -2) shows excellent CF 3 CF 3 sensing performance at 200 °C. The response value of the S-SnO 2 -2 sensor to 25 ppm CF 3 CF 3 at 200 °C is 13.44, which is significantly higher than the pristine SnO 2 response value of 4.45. The S-SnO 2 -2 sensor also exhibits a short response and recovery time (10 s and 148 s), reliable linear response, excellent selectivity, low limit of detection (0.5 ppm), satisfactory reparability, and good long-term stability. The sensing process of CF 3 CF 3 has been investigated by means of gas chromatography-mass spectrometry (GC-MS). The excellent sensing performance of CF 3 CF 3 in the S-SnO 2 -2 sensor can be attributed to the abundant active oxygen, excellent electron capture capability, and fast charge transfer of S-SnO 2 -2, which also benefits from its smaller grain size. This work is the first to report CF 3 CF 3 sensing using MOS gas sensors and has developed a feasible way for CF 3 CF 3 detection.
研究领域:
材料科学
·
环境科学
·
纳米技术
·
气体传感
✓ 已验证
产品关联
DOI
高影响因子
Small
·
2022
·Vol. 18
·期 45
·2204446
·
IF 15.153
Hui Shu,Changtao Peng,Qian Chen,Zhangfeng Huang,Chen Deng,Wenjie Luo,Haijin Li,Wenfeng Zhang,Wenhua Zhang,Yuelong Huang
Combining two kinds of electron transport layer (ETL) which have complementary advantages into a bilayer structure to form a bilayer ETL is an effective way to transcend inherent limitations of single-layer ETL, which is very helpful in the development of perovskite solar cells (PSCs). In this work, a strategy is proposed to break constraints on the application of the staggered bilayer ETL in high-efficiency PSC, namely utilizing a built-in field to overcome the dilemma in E CBM making it possible to improve V OC and FF simultaneously by tuning the Fermi level of ETLs properly. According to the strategy, a bilayer ETL structure comprised of C-TiO 2 and SnO 2 layer and corresponding Li-doping process are developed, and the characterization results confirm the effectiveness of the strategy, making the potentials of the C-TiO 2 (Li)/SnO 2 bilayer ETL fully released for its application in high-efficiency PSCs: a V OC of 1.201 V for an ordinary triple-cation-perovskite-based PSC and a photoelectric conversion efficiency of 24.3% for a low-bandgap-perovskite-based PSC with high haze FTO superstrate are successfully achieved, indicating that the C-TiO 2 (Li)/SnO 2 bilayer ETL is a successful application paradigm of the proposed strategy and very promising in the application of high-efficiency PSCs.
研究领域:
材料科学
·
能源科学
·
光伏技术
✓ 已验证
DOI
PubMed
高影响因子
Nanomaterials
·
2019
·Vol. 10
·期 1
·53
·
IF 4.034
Yuanyuan Li,Xiaofang Tian,Yaoqiong Wang,Qimei Yang,Yue Diao,Bin Zhang,Dingfeng Yang
Using solar energy to remove antibiotics from aqueous environments via photocatalysis is highly desirable. In this work, a novel type-II heterojunction photocatalyst, MgSn(OH)6/SnO2,was successfully prepared via a facile one-pot in situ hydrothermal method at 220 °C for 24 h. The obtained heterojunctions were characterized via powder X-ray diffraction, Fourier-transform infrared spectroscopy, transmission electron microscopy, and ultraviolet-visible diffuse reflectance spectroscopy. The photocatalytic performance was evaluated for photodegradation of tetracycline solution under ultraviolet irradiation. The initial concentration of tetracycline solution was set to be 20 mg/L. The prepared heterojunctions exhibited superior photocatalytic activity compared with the parent MgSn(OH)6and SnO2compounds. Among them, the obtained MgSn(OH)6/SnO2heterojunction with MgCl2·6H2O:SnCl4·5H2O = 4:5.2 (mmol) displayed the highest photocatalytic performance and the photodegradation efficiency conversion of 91% could be reached after 60 min under ultraviolet irradiation. The prepared heterojunction maintained its performance after four successive cycles of use. Active species trapping experiments demonstrated that holes were the dominant active species. Hydroxyl radicals and superoxide ions had minor effects on the photocatalytic oxidation of tetracycline. Photoelectrochemical measurements were used to investigate the photocatalytic mechanism. The enhancement of photocatalytic activity could be assigned to the formation of a type-II junction photocatalytic system, which was beneficial for efficient transfer and separation of photogenerated electrons and holes. This research provides an in situ growth strategy for the design of highly efficient photocatalysts for environmental restoration.
研究领域:
材料科学
·
环境催化
·
光催化
·
水处理
·
纳米材料
✓ 已验证
DOI
高影响因子
JOURNAL OF CATALYSIS
·
2022
·
IF 8.047
Yuhang Zhang,Shaocong Yang,Zhen Wang,Hongjuan Qin,Gaojin Lyu,Jiachuan Chen,Guihua Yang
Herein, a novel p-n type BiOBr/Zn x @SnO 2-n photocatalyst was designed by using BiOBr coupling with large specific surface area Zn doped SnO 2 through a facile in situ approach. The composite possesses proper redox potential as well as high efficiency interfacial charge transfer capability. Coupling BiOBr with Zn doped SnO 2 is proved efficiency to form a facile bandgap regulation mechanism and could adjust the absorption capacity of visible light, thus enhances the photocatalytic performance effectively. The photocatalyst exhibits high efficiency in photo-reforming of fructose to lactic acid under alkaline conditions, achieving a maximum yield of 79.6% and still achieving a lactic acid yield of 70.7% even after five cycles of recycling. Possible pathways of the lactic acid production were proposed based on the generation of active oxidative radicals and the products detected during the reaction. Therefore, this work provides an effective approach for biomass conversion through rational photocatalyst design.
研究领域:
材料科学
·
催化
·
化学工程
·
环境科学
✓ 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）