CHEMICAL PHYSICS LETTERS
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2021
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IF 2.328
Zhiling Guo,Shanshan Wu,Deping Xiong,Yefeng Feng,Jin Ke,Kaidan Wu,Yukun Sun,Miao He,Zuyong Feng
A novel ternary SnO 2 -Nb-C composite, which consists of SnO 2 nanoparticles and a fraction of Niobium (Nb) embedded in flake carbon, is synthesized by hydrothermal and ball milling method. To be used as an anode material for lithium-ion batteries (LIBs), the SnO 2 -Nb-C composite is smoothly doped with n-type elements owing to the various valences of Nb , which enhances the electronic conductivity of the electrode, and effectively inhibits volume changes in SnO 2 during the cycle process, thus improving the electrode’s electrochemical performance. Therefore, at 0.2 A g −1 , the capacity is 956 mAh g −1 after 100 cycles, and the rate capacity is 1130.2 mAh g −1 . Furthermore, at 1.0 A g −1 , the specific discharge capacity is 1077.0 mAh g −1 after 500 cycles. According to the characterization results, the SnO 2 -Nb-C nanocomposite can be regarded as a potential anode material for LIBs.
研究领域:
材料科学
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储能
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电化学
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纳米复合材料
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电池技术
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2020
·Vol. 31
·期 19
·16539-16547
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IF 2.22
Li Jian,Chen Chen,Li Jialin,Li Shijun,Dong Chengjun
Tin-glycerate (Sn-Gly) spheres were synthesized through a simple solvothermal strategy, which was further thermally converted into SnO 2 . It is found that the loose SnO 2 spheres have been built up from nanoparticles with about 10 nm in size. The use of such SnO 2 nanostructures was further performed for low-ppm-level acetone detection. The results showed that the SnO 2 presented response of 123 to 100 ppm acetone vapor at 260 °C. The sensor also exhibited rapid response/recovery time (24.5 s/6.5 s), low detection limit (1.5 at 1 ppm), excellent selectivity, and good reproducibility. Especially, a good linearity ranging from 1 to 100 ppm acetone was fitted, making it a promising candidate for acetone detection.
研究领域:
材料科学
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化学传感器
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纳米技术
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DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
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2017
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IF 3.012
Shasha Jing,Huijun Zheng,Li Zhao,Lingbo Qu,Lanlan Yu
A sensitive electrochemical sensor based on sodium dodecyl sulfonate (SDS) functionalized graphene hybrid SnO 2 nanoparticles (SDS-GN/SnO 2 ) composite was fabricated via one-pot synthesis. The SDS-GN/SnO 2 nanocomposite significantly increased the redox activity of daphnetin due to the individual merit and mutual effect of SDS-GN and SnO 2 nanoparticles which improved the performance of the electrochemical sensor with high sensitivity. Cyclic voltammetry (CV) and differential pulse voltammetry (DPV) measurements were used for the detection of daphnetin. Under the optimal conditions, the oxidation peak currents of daphnetin increased proportionally to the concentration within the range of 0.03–1.0 μmol L − 1 and 1.0–8.0 μmol L − 1 , and the limit of detection was 8.0 nmol L − 1 . The proposed modified electrode was highly sensitive and was successfully applied to determine daphnetin in the pharmaceutical sample with satisfactory recoveries. The as-prepared SDS-GN/SnO 2 /GCE electrochemical sensor offers a feasible way for designing simpler, low cost sensors based on SnO 2 nanoparticles.
研究领域:
电化学
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材料科学
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分析化学
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纳米技术
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DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
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2013
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IF 5.825
Hongying Zhao,Junxia Gao,Guohua Zhao,Jiaqi Fan,Yanbin Wang,Yujing Wang
A novel SnO 2 -Sb/CA electrode, possessing high surface area, strong adsorption capacity, good electrical conductivity and electrocatalytic activity, was firstly proposed for ultrasonic electrochemical oxidation (US-EC) of persistent high concentration perfluorooctanoate (PFOA) in this study. The optimal calcination temperature for sinking micro-sized SnO 2 -Sb particles existed on the surface of CA into the structure of CA as nanoparticles was 600 °C. Its application on degrading PFOA (60 mL of 100 mg L −1 ) exhibited efficient electrocatalytic performance. After 5 h electrolysis, over 91% of PFOA was degraded with a first-order kinetic constant of 0.52 h −1 and over 86% TOC removal was achieved, while 47% PFOA removal and 33% TOC removal were obtained in traditional electrochemical (EC) process. The main role of determining the decomposition efficiency, i.e., the mass transport, hydroxyl radical (·OH) generation and electrode surface reaction, were greatly enhanced in US-EC system. Additionally, the generated intermediates existing on electrode surface and in solution were separately detected after different electrolysis time and the proper mechanism for efficient removing PFOA in US-EC process was investigated in detail. At early reaction stage (<0.5 h), the intermediate products on SnO 2 -Sb/CA surface were C 5 F 11 COO − , C 4 F 9 COO − , C 3 F 7 COO − , C 2 F 5 COO − , CF 3 COO − , while in solution were C 5 F 11 COO − , C 4 F 9 COO − , C 3 F 7 COO − . At late reaction stage (>5 h), the intermediates either on electrode surface or in solution became the same including C 5 F 11 COO − , C 4 F 9 COO − , C 3 F 7 COO − .
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
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2022
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IF 10.383
Rui Zhao,Zhiqiang Deng,Zequn Zhang,Jing Zhang,Tonghui Guo,Yanjun Xing,Xiaohui Liu,Like Huang,Ziyang Hu,Yuejin Zhu
N-type tin oxide (SnO2) films are commonly used as an electron transport layer (ETL) in perovskite solar cells (PSCs). However, SnO2 films are of poor quality due to facile agglomeration under a low-temperature preparation method. In addition, energy level mismatch between the SnO2 and perovskite (PVK) layer as well as interfacial charge recombination would cause open-circuit voltage loss. In this work, alkali metal oxalates (M-Oxalate, M = Li, Na, and K) are doped into the SnO2 precursor to solve these problems. First, it is found that the hydrolyzed alkali metal cations tend to change colloid size distribution of SnO2, in which Na-Oxalate with suitable basicity leads to most uniform colloid size distribution and high-quality SnO2-Na films. Second, the electron conductivity is enhanced by slightly agglomerated SnO2-Na, which facilitates the transmission of electrons. Third, alkali metal cations increase the conduction band level of SnO2 in the sequence of K+, Na+, and Li+ to promote band alignment between ETLs and perovskite. Based on the optimized film quality and energy states of SnO2-Na, the best PSC efficiency of 20.78% is achieved with a significantly enhanced open-circuit voltage of 1.10 V. This work highlights the function of alkali metal salts on the colloid particle distribution and energy level modulation of SnO2.
研究领域:
材料科学
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能源科学
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产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry A
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2015
·Vol. 4
·期 2
·466-477
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IF 7.443
Bo Li,Enyan Guo,Chengxiang Wang,Longwei Yin
We developed a facile strategy for the fabrication of uniform Au inlaid Zn2SnO4/SnO2 hollow rounded cubes with an adjustable Au loading content using ZnSn(OH)6 as the precursor, chloroauric acid as the Au source and ascorbic acid as the reducing agent. The Au inlaid Zn2SnO4/SnO2 hollow rounded cubes show enhanced light absorption ability and reduced recombination rate of photogenerated electron–hole pairs compared with pure Zn2SnO4/SnO2. The hollow rounded cube structured Au–Zn2SnO4/SnO2 sample displays a high surface area and high dye adsorption ability. As photoanodes for DSSCs, the Au–Zn2SnO4/SnO2 hollow rounded cubes demonstrate a greatly enhanced Jsc and an improved power conversion efficiency of up to 2.04%, almost 73% higher compared to the photovoltaic conversion efficiency of pure Zn2SnO4/SnO2 based DSSCs. The greatly improved power conversion efficiency of DSSCs based on the Au inlaid Zn2SnO4/SnO2 photoanode can be attributed to the following three factors. Firstly, the localized surface plasmon resonance of Au nanoparticles plays a crucial role in the enhancement of visible light absorption. Secondly, the potential barrier on the Zn2SnO4/SnO2 surface caused by Au nanoparticles can suppress electron–hole recombination, diminish the loss of electrons during the transfer process and improve the photocurrent density. Thirdly, the enhanced photovoltaic performance can also be attributed to the unique structural characteristics of hollow rounded cubes.
研究领域:
材料科学
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能源科学
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产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
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2017
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IF 4.798
Lianghao Li,Zhuangpeng Huang,Xiaoxiao Fan,Zhen Zhang,Rongni Dou,Shulong Wen,Yuan Chen,Yuancai Chen,Yongyou Hu
An optimized metal oxide electrode (Ti/SnO 2 -Sb-Pd) was prepared via thermal decomposition and used in the electrochemical degradation of Ni-EDTA. The electrode was characterized by SEM, XRD, XPS, and electrochemical characterizations including linear-sweep voltammetry (LSV), cyclic voltammetry (CV) and chronopotentiometry (CP) techniques. It was found that Pd doping could effectively change the surface morphology and lattice parameters of the metal oxide electrode. Pd can facilitate the entry of more Sb into SnO 2 crystals and promote the reduction of Sb from the +5 to the +3 state. The interaction of these metals raised the oxygen evolution potential (OEP) and electrochemical surface area of the electrode, in addition to reducing the degradation potential and increasing the degradation current of Ni-EDTA. When the molar ratio of Pd:Sn was 2.5%, the electrode could simultaneously degrade 87.5% of Ni-EDTA and recycle 17.9% of elemental Ni on the cathode within 120 min. At the same time, with Pd doping, the lifetime of the electrode was increased more than 40 times, demonstrating good potential for application in industry.
研究领域:
材料科学
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环境工程
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产品关联
DOI
高影响因子
Journal of Materials Chemistry A
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2016
·Vol. 4
·期 21
·8374-8383
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IF 8.262
Liangbin Xiong,Minchao Qin,Guang Yang,Yaxiong Guo,Hongwei Lei,Qin Liu,Weijun Ke,Hong Tao,Pingli Qin,Songzhan Li,Huaqing Yu,Guojia Fang
Mg doping into high temperature processed (HTP) SnO2 as an electron selective layer (ESL) significantly improves perovskite solar cell (PSC) performance including power conversion efficiency (PCE), open circuit voltage, short circuit current (JSC) and fill factor. An optimum Mg content (7.5%) affords a uniform, smooth and dense Mg-doped SnO2 film with high electron mobility and its corresponding PSC displays less hysteresis and achieves a highest steady-state PCE of 14.55%, nearly 92.8% enhancement compared to that with undoped SnO2. Electrical measurements show that suitable Mg doping dramatically reduces free electron density and substantially increases the electron mobility of pristine SnO2. The mechanism of efficiency enhancement for PSCs is proposed as follows: the low free electron density causes suppression of carrier recombination and high electron mobility facilitates fast extraction of electrons from perovskite to ESLs, contributing to an improved JSC. Impedance analysis strongly supports the proposed mechanism and reveals that the higher is the electron mobility, the higher is the electron collection efficiency, and the higher are the JSC and PCE. The HTP SnO2 with a suitable Mg content can be an excellent ESL for PSCs and might well be a suitable candidate of ESLs for CdTe, CuInGaSe and other photovoltaic devices involved in HTP treatment.
研究领域:
材料科学
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能源技术
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物理化学
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产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2017
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IF 4.233
Ziying Wang,Tong Zhang,Chen Zhao,Tianyi Han,Teng Fei,Sen Liu,Geyu Lu
In this paper, we demonstrate room-temperature NO 2 gas sensors using Pd nanoparticles (NPs) and SnO 2 NPs decorated reduced graphene oxide (Pd-SnO 2 -RGO) hybrids as sensing materials. It is found that ultrafine Pd NPs and SnO 2 NPs with particle sizes of 3–5 nm are attached to RGO nanosheets . Compared to SnO 2 -RGO hybrids, the sensor based on Pd-SnO 2 -RGO hybrids exhibited higher sensitivity at room temperature , where the response to 1 ppm NO 2 was 3.92 with the response time and recovery time being 13 s and 105 s. Moreover, such sensor exhibited excellent selectivity , and low detection limit (50 ppb). In addition to high transport capability of RGO as well as excellent NO 2 adsorption ability derived from ultrafine SnO 2 NPs and Pd NPs, the superior sensing performances of the hybrids were attributed to the synergetic effect of Pd NPs, SnO 2 NPs and RGO. Particularly, the excellent sensing performances were related to high conductivity and catalytic activity of Pd NPs. Finally, the sensing mechanism for NO 2 sensing and the reason for enhanced sensing performances by introduction of Pd NPs are also discussed.
研究领域:
材料科学
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纳米技术
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传感器
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环境监测
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
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2021
·Vol. 168
·期 10
·106510
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IF 4.316
Yijing Xia,Yan Yan,Lingbing Hu,Qizhou Dai,Xiangjuan Ma,Juqing Lou,Yi Xia
This study focused on the enhanced mechanism of electrochemical degradation of antibiotic norfloxacin (NOR) using a self-made Ti/SnO2-Sb2O3/α,β-Co-PbO2 electrode. The electrode characterization, reaction mechanism, degradation performance, and toxicity assessment were studied. In contrast to the conventional Ti/SnO2-Sb2O3/α,β-PbO2 electrode, our prepared Co-doped PbO2 electrode showed the characteristics of more compact surface, smaller crystal size, higher oxygen evolution potential (OEP) and an increased yield of ·OH concentration. The application of Co-doped PbO2 electrode for the electrochemical oxidation of NOR was systematically analyzed. The optimal operating parameters were found to be Na2SO4 concentration of 0.1 mol L−1, initial NOR concentration of 50 mg L−1, initial pH of 5 and current density of 20 mA cm−2. Under these conditions, NOR, chemical oxygen demand (COD) and total organic carbon (TOC) removals reached 85.29%, 43.65% and 41.89% after 60 min of electrolysis, respectively. Through the intermediates detected during the electrochemical treatment process, a reaction pathway involving decarboxylation, defluorination and piperazine ring-opening was proposed. Finally, the toxicity assessment of the treated NOR solution towards Vibrio fischeri rapidly fell to non-toxicity and even reached to negative values after 50 min of electrolysis, indicating that electrochemical oxidation of NOR is an effective approach to reduce its toxicity to environmental ecosystem.
研究领域:
环境科学
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电化学工程
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毒理学
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产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
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2023
·Vol. 33
·期 11
·2213961
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IF 19
Linghui Zhang,Chao Fu,Shi Wang,Minhuan Wang,Ruiting Wang,Shengling Xiang,Zhiyong Wang,Jing Liu,Hongru Ma,Yudi Wang,Ying Yan,Min Chen,Lei Shi,Qingshun Dong,Jiming Bian,Yantao Shi
Flexible perovskite solar cells (f-PSCs) show great promise in portable-power applications (e.g., chargers, drones) and low-cost, scalable productions (e.g., roll-to-roll). However, in conventional n–i–p architecture f-PSCs, the low-temperature processed metal oxide electron transport layers (ETLs) usually suffer from high resistance and severe defects that limit the power conversion efficiency (PCE) improvement of f-PSCs. Besides the enhancement in the mobility of metal oxide and passivation for perovskite/ETL interfacial defects reported in previous literature, herein, the electron transport loss between the metal oxide nanocrystallines within the ETL is studied by introducing an amorphous F-doped TiO x (F-TiO x ) caulked crystalline SnO 2 composite ETL. The F-TiO x in this novel composite ETL acts as an interstitial medium between adjacent SnO 2 nanocrystallines, which can provide more electron transport channels, effectively passivate oxygen vacancies, and optimize the energy level arrangement, thus significantly enhancing the electron mobility of ETL and reducing the charge transport losses. The composite ETL-based f-PSCs achieve a high PCE of 22.70% and good operational stability. Furthermore, a moderate roughness of the composite ETL endows f-PSCs with superior mechanical reliability by virtue of a strong coupling at the ETL/perovskite interface, by which the f-PSCs can maintain 82.11% of their initial PCE after 4000 bending cycles.
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
SENSORS AND ACTUATORS B-CHEMICAL
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2023
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IF 8.4
Dingyi Feng,Hongrong Zheng,Hao Sun,Jinze Li,Jiawei Xi,Li Deng,Yasong Guo,Biqiang Jiang,Jianlin Zhao
A fiber-optic humidity sensor based on excessively tilted fiber grating (Ex-TFG) wrapped with tin dioxide (SnO 2 )/polyvinyl alcohol (PVA) hybrid nanofibers is presented. Relative humidity (RH) rise causes the changes both in refractive index (RI) and geometry size of the film. The transmitted spectrum of the Ex-TFG changes as a result, owing to the strong interaction of the excited forward propagating cladding modes to the surface coating . Experimental results demonstrate the maximum intensity sensitivity of 0.43 dB/%RH in RH range of 35%−75%. Compared with pure PVA film coated ones, the RH sensitivity of the SnO 2 /PVA wrapped grating is vastly enhanced by one order of magnitude. The reticular morphology of electrospun SnO 2 /PVA film around the Ex-TFG promises the unimpeded permeation of water molecules, and then the sensor exhibits an ultrafast response of ∼67 ms and recovery times of ∼83 ms, by monitoring the human breathing with different rhythms. Lastly, the negligible spectral deformation to temperature perturbations verifies the temperature de-correlation of the designed RH sensor. This work indicates that the proposed SnO 2 /PVA nanofibers wrapped Ex-TFG can provide a simple, robust and high-sensitive optic device for healthcare monitoring, environmental and biochemical sensing applications.
研究领域:
光学传感
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材料科学
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生物医学工程
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）