MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
·
2021
·
IF 3.927
Qian Ma,Hang Li,Jia Guo,Shushu Chu,Qi Zhang,Ziqiong Lin
Porous SnO 2 /NiO hollow nanofibers with effective surface transmission behavior have been prepared through a facile modified electrospinning method . The introduction of Ni component into the precursor solution can not only regulate the morphological evolution together with the nucleation and crystallization of oxide heterostructures at the elevated temperature action, but also significantly contribute to the enhancement of the gas-sensing performance for testing n-butanol gas. SnO 2 /NiO composites can present the highest response of 199 at the optimum operating temperature of 280 °C toward 100 ppm n-butanol gas, which is 4.5 times than that of pure SnO 2 nanofibers. Meanwhile, the response/recovery times of the sensors can be immensely decreased from 57/16 s of pure sample to 36/10 s as the adding amount of Ni component increasing to 5%, along with the superior selectivity and long-term stability toward n-butanol. The excellent gas-sensing properties of the sensors can be mainly attributed to the flourishing porous one-dimensional (1D) microstructure containing the closely connected p-n heterojunctions of SnO 2 and NiO, which can provide large specific surface areas with a mass of active sites to promote the reaction between n-butanol molecule and O δ− on the surface.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
RSC Advances
·
2014
·Vol. 4
·期 101
·57463-57475
·
IF 3.708
Tigang Duan,Ye Chen,Qing Wen,Ying Duan
A Ti/Sb–SnO2 electrode modified with titanium nitride (TiN) nanoparticles was prepared by the pulse electro-codeposition method. X-ray diffraction and scanning electron microscopy show that compared with Ti/Sb–SnO2, the Ti/Sb–SnO2–TiN electrode has a small unit cell volume of tetragonal SnO2 and a refined, compact particle film. X-ray photoelectron spectroscopy analysis shows that introducing titanium nitride nanoparticles facilitates the formation of Sb5+. And the adsorbed hydroxyl oxygen species content of Ti/Sb–SnO2–TiN (43.07%) is higher than that of Ti/Sb–SnO2 (21.85%), indicating that the Ti/Sb–SnO2–TiN electrode has more active sites for electrochemical oxidation of organic pollutants. In 0.25 M Na2SO4 solution, the charge transfer resistance of Ti/Sb–SnO2–TiN (150 ohm) is much smaller than that of Ti/Sb–SnO2 (1334 ohm). With a constant current density of 100 mA cm−2, the accelerated service lifetime of Ti/Sb–SnO2–TiN is improved significantly, which is 15.7 times as long as that of Ti/Sb–SnO2. The Ti/Sb–SnO2–TiN electrode is demonstrated to have a prominent ability for oxidative decolorization of methylene blue. The results also confirm that the Ti/Sb–SnO2–TiN electrode has a higher decolorization efficiency and kinetic rate constant, which are 1.54 and 3.24 times as efficient as those of Ti/Sb–SnO2, respectively.
研究领域:
环境科学
·
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Nano Energy
·
2015
·
IF 10.325
Zemin Zhang,Caitian Gao,Zimao Wu,Weihua Han,Yaling Wang,Wenbin Fu,Xiaodong Li,Erqing Xie
We report the fabrication of screw-like SnO 2 nanostructure and its application as photoanode for photoelectrochemical water splitting . The structure was formed by growing thread-like SnO 2 nanosheets onto rod-like single-crystalline SnO 2 nanowires . Such a structure offers an efficient light absorption, high speed electron transport and a large surface-to-volume ratio. The light absorption efficiency of the screw-like SnO 2 nanostructures can be increased by up to 33% than that of the pristine SnO 2 nanowires. After decorated with CdS quantum dots , the photocurrent density can reach 9.9 mA cm −2 at 0 V ( versus saturated calomel electrode) which corresponding to a hydrogen generation of 159.6 μmol (h cm 2 ) −1 and the faradic efficiency is around 86%. The result demonstrated that the water-splitting efficiency of photoelectrochemical cell has been significantly improved by using such a screw-like structure. Our work provides an efficient solution to improve the water-splitting performance and it can also be a model structure for similar electrode materials.
研究领域:
材料科学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
Nanomaterials
·
2025
·Vol. 15
·期 19
·1471
·
IF 4.3
Liming Song,Xiaoxin Dou,Jianmei Shao,Yuanzheng Luo,Fumiao Liu,Chengyong Li,Lijuan Yan,Chuhong Wang,Yuting Li,Yuqing Cai,Jinsheng He,Zhenqing Dai,Ruikun Sun,Qin Xie
Hierarchical NiO-SnO 2 nanoflowers were prepared via a one-step hydrothermal method. The morphology, structure and components of the hierarchical NiO-SnO 2 nanoflowers were examined via scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray powder diffraction (XRD) and X-ray photoelectron spectroscopy (XPS), respectively. The ethanol gas-sensing performance was systematically analyzed between pure hierarchical SnO 2 nanoflowers and the hierarchical NiO-SnO 2 nanoflowers. The results indicated that the hierarchical NiO-SnO 2 nanoflowers showed better gas-sensing properties than the pure hierarchical SnO 2 nanoflowers at 164 °C. The enhanced gas-sensing performance was ascribed to the formation of p-n heterojunctions between p-type NiO and n-type SnO 2 . Additionally, NiO has a catalytic role. Therefore, hierarchical NiO-SnO 2 nanoflowers could be a potential gas-sensing material for the fabrication of high-quality ethanol gas sensors.
研究领域:
材料科学
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纳米技术
·
传感器学
·
无机化学
·
功能材料
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CARBON
·
2021
·
IF 9.594
Zijin Yang,Xianying Qin,Kui Lin,Qiuchan Cai,Cuiping Han,Feiyu Kang,Baohua Li
Tin dioxide (SnO 2 ) is a promising anode material for lithium-ion and sodium-ion batteries. However, the huge volume expansion during cycling makes it far away from practical application. Herein, we report a template-free “heterogeneous carbonization” strategy for fabricating SnO 2 /carbon/void/carbon nanofibers (SCVC) compound membrane with finite spatial domain in carbon matrix as buffer layer for volume changes of SnO 2 . Reduced graphene oxide (rGO) is also imported into the SCVC membrane, acting as conductive binders to construct a free-standing SCVC-rGO electrode with exceptionally conductive network. The resultant SCVC-rGO anodes in lithium/sodium-ion batteries could deliver excellent electrochemical performances of higher reversible capacity, longer lifespan and superior rate capability. As lithium-ion battery anode, the SCVC-rGO electrode shows specific capacities of 950 mA h g −1 after 400 cycles at a current of 0.5 A g −1 , and 824 mA h g −1 after 650 cycles at 1 A g −1 . In sodium-ion batteries, the SCVC-rGO electrode gives rise to the specific capacity of 407 mA h g −1 after 2000 cycles at the current of 1 A g −1 with exceptional capacity retention.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2014
·
IF 5.9
Mingxi Chen,Huan Wang,Lingzhi Li,Zhe Zhang,Cong Wang,Yu Liu,Wei Wang,Jianping Gao
A facile and novel method to prepare SnO2/reduced graphene oxide (rGO) droplet aerogels with complex morphologies had been developed. This method has been named dynamic self-assemble. Aerogels with both “egg-tart” and “mushroom” shapes were obtained by this method. The changes in the graphene oxide (GO) droplet morphologies during the dynamic process of a GO droplet falling into a SnCl2 target solution were monitored using a high speed camera. The formed SnO2/rGO aerogels were then characterized by Raman spectroscopy, thermogravimetric analysis, X-ray diffraction analysis, and X-ray photoelectron spectroscopy. The microstructures of the SnO2/rGO aerogels were observed with scanning electron microscopy and transmission electron microscopy. Finally, the SnO2/rGO droplet aerogels were used as the electrode material in a symmetrical two-electrode supercapacitor and the electrochemical performance of the supercapacitor was investigated using cyclic voltammetry and galvanostatic charge/discharge methods. The SnO2/rGO electrodes demonstrated excellent electrochemical performance and stability. At a scan rate of 5 mV/s, their highest gravimetric and volumetric specific capacitances were 310 F/g and 180 F/cm3, respectively, and their energy and power densities were as high as 30 Wh·kg–1 and 8.3 kW·kg–1, respectively.
研究领域:
材料科学
·
能源存储与转换
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Biomed Research International
·
2018
·
IF 2.583
Huiling Lv,Chao Wu,Xuan Liu,Andi Bai,Yue Cao,Wenjing Shang,Lili Hu,Ying Liu
In this study, we prepared PTX-loaded mesoporous hollow SnO2 nanofibers conjugated with folic acid (SFNFP) for liver cancer therapy. According to SEM and TEM characterization, SFNF showed a mesoporous hollow structure. The average outer diameter was 200 nm, and the wall thickness was 50 nm. The DSC and XRD study showed that PTX in the channels of nanofibers was present in an amorphous state. The in vitro release experiments demonstrated that SFNF could efficiently improve the dissolution rate of PTX. Both in vitro cell experiments and in vivo antitumor experiments showed that SFNFP could efficiently inhibit the growth of liver cancer cells. Therefore, SFNF is a promising targeting antitumor drug delivery carrier.
研究领域:
纳米技术
·
药学
·
癌症研究
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材料科学
✓ 已验证
DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2025
·
IF 7.7
Shixin Huang,Wei Liu,Hailong Lin,Zhicheng Wen,Chunjin Hang,Rong An,Yongfeng Li,Yanhong Tian
The design of materials for the detection of n-butanol at low operating temperatures is of great significance for the reduction of power consumption and the improvement of the safety of the gas sensor. In this study, the solvothermal method and subsequent Ag-loading treatment were employed to synthesise hierarchical flower-like Cu-doped SnO 2 /Ag 2 S heterojunctions decorated with Ag (CSAA). The morphological and structural characterisation demonstrated that the amount of Cu 2+ doping and the duration of electroless Ag plating played a pivotal role in the morphological evolution of the SnO 2 -based hierarchical structure. The optimal CSAA composite exhibits the highest response of 1136 and the shortest response time of 6 s to 50 ppm n-butanol at 80°C, accompanied by superior selectivity, repeatability, humidity and long-term stability. The enhanced sensing performances of the CSAA sensor can be mainly ascribed to the hierarchical porous structure, the doping of Cu 2+ , the construction of SnO 2 /Ag 2 S heterostructures and the decoration of Ag nanoparticles (Ag NPs). Furthermore, the density functional theory simulation was employed to investigate the influence of Ag NPs and Ag 2 S on the adsorption properties and electronic behaviour of n-butanol on the surface of SnO 2 . This work proposes a friendly strategy and theoretical support for enhancing the sensing performance of MOS sensors in the practical detection of n-butanol.
研究领域:
材料科学
·
化学
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry A
·
2018
·Vol. 6
·期 17
·7409-7419
·
IF 9.931
Zhiyong Liu,Bo Sun,Xingyue Liu,Jinghui Han,Haibo Ye,Yuxue Tu,Chen Chen,Tielin Shi,Zirong Tang,Guanglan Liao
Perovskite solar cells (PSCs) are one of the most promising lab-scale technologies to deliver inexpensive solar electricity. Low-temperature printable carbon counter electrode based planar-heterojunction PSCs are particularly suitable for future large-scale manufacturing, but suffer from an inferior efficiency. Here, we demonstrate a TiO2/SnO2 bilayer as the electron transport layer (ETL) for carbon counter electrode based planar-heterojunction PSCs together with micromolecule Cu-phthalocyanine (CuPc) as the hole transport layer (HTL), yielding a high power conversion efficiency of 15.39% and an excellent stability over 1200 h. The improved performances are attributed to a better energy level transition, a suppressed electron–hole recombination, and a wider depletion region of the TiO2/SnO2 bilayer. Our work represents a great advancement in the fabrication and popularization of carbon counter electrode based PSCs. More importantly, the whole devices are processed at a temperature below 200 °C, providing potential application of PSCs in monolithic tandem devices and paving the way for the development of carbon based flexible PSCs.
研究领域:
材料科学
·
能源技术
·
光伏器件
✓ 已验证
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2024
·
IF 4.9
Mengdie Yang,Jiabao Zuo,Yanan Pan,Gaifang Lv,Qi Yang,Yang Fan,Fan Qiu,Shupeng Zhang
In this work, a novel flexible electrochemical sensor was successfully developed for the simultaneous determination of p-aminophenol and acetaminophen. The sensor is composed of a methanesulfonic acid-treated poly(3,4-ethylenedioxythiophene)/poly(styrenesulfonic acid) film on a poly(ethylene terephthalate) substrate, which has been modified using a zinc oxide-doped tin oxide heterojunction applied through drop-coating (C-ZnO/SnO 2 -PEDOT/PET). The oxygen vacancies resulting from zinc oxide-doped tin oxide heterojunctions within highly conductive metal oxide nanomaterials enhance mass transfer and synergize seamlessly with methanesulfonic acid-treated electrically conductive dielectric PEDOT/PET films, leading to a substantial improvement in electrochemical activity. Under the optimal conditions, a wider linear range and lower detection limits were shown for p-aminophenol (2–511 μM, LOD=0.437 μM) and acetaminophen (2–591 μM, LOD=0.562 μM). In addition, the sensors demonstrated high accuracy in detecting p-aminophenol and acetaminophen in real samples, with recoveries of 99.36 %-99.60 % and 97.56 %-99.80 %, respectively. Furthermore, the flexible sensors maintained a superior electrochemical response when detecting p-aminophenol and acetaminophen at different bending angles, with relative standard deviations of 0.62 % and 1.68 %, respectively. These findings suggest potential applications for the development of wearable sensors in the future.
研究领域:
分析化学
·
材料科学
·
医学诊断
✓ 已验证
产品关联
DOI
高影响因子
LANGMUIR
·
2020
·
IF 3.557
Yue Liu,Song Wei,Gang Wang,Junye Tong,Jing Li,Daocheng Pan
In previous reports of the literature, ZnO nanoparticles were unexceptionally used as the electron transportation material in highly efficient CdSe-based quantum dot light-emitting diodes (QD-LEDs). However, as an amphoteric oxide, ZnO nanoparticles are chemically unstable in air. Here, we utilize quantum-sized SnO2 nanoparticles as the electron transportation layer (ETL) of CdSe-based QD-LEDs. Decreasing the size of SnO2 nanoparticles will upshift the conduction band from −4.50 to −3.84 eV based on the quantum size effect, which is beneficial to facilitate electron injection into the QD emitting layer. Our investigations show that QD-LEDs based on quantum-sized SnO2 nanoparticles exhibit comparable electroluminescence properties and higher stability in contrast to ZnO nanoparticle-based QD-LEDs, demonstrating that small-sized SnO2 nanoparticles have a bright prospect due to the ETL in QD-LEDs.
研究领域:
材料科学
·
光电学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2018
·
IF 8.097
Haijin Liu,Cuiwei Du,Meng Li,Shengsen Zhang,Haokun Bai,Lin Yang,Shanqing Zhang
The establishment of p–n heterojunction between semiconductors is an effective means to improve the performance of semiconductor photocatalysts. For the first time, we synthesize SnO2/BiOBr heterojunction photocatalysts using a one-step hydrothermal method. Systematic material characterizations suggest that the photocatalysts consist of irregular BiOBr nanosheets with the length about 200 nm and width about 150 nm, and SnO2 nanoparticles are anchored uniformly onto the nanosheets. Most importantly, electrochemical characterizations including transient photocurrent profiles and electrochemical impedance spectra suggest that SnO2/BiOBr heterojunctions are created, which facilitates the charge separation and transfer efficiency of photogenerated charge carriers. As such, SnO2/BiOBr photocatalysts exhibit remarkable photocatalytic activities in terms of degrading a series of organic pollutants. Radical trapping experiments and electron spin resonance spectra suggest that superoxide radicals (•O2–) and hydroxyl radicals (•OH) are primary medium species running through the photocatalytic degradation process and enhanced photocatalytic performance.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）