Journal of Materials Chemistry C
·
2019
·Vol. 7
·期 38
·11984-11990
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IF 6.641
Jing Yang,Jiaqiang Liu,Yan Xu,Xianliang Li,Junbiao Wu,Yide Han,Zhuopeng Wang,Xia Zhang
Template-controlled syntheses via metal–organic frameworks (MOFs) have emerged as a general strategy to fabricate metal oxides with tailored porous structures. Here, novel hierarchical SnO2/α-Fe2O3 hollow microcubes have been obtained by post-loading of Sn2+ ions on the surface of Fe4(Fe(CN)6)3 microcubes and a subsequent thermolysis route. The as-formed hierarchical SnO2/α-Fe2O3 composites exhibit remarkable selective acetone-sensing properties, in which the optimum composition of SnO2/α-Fe2O3 with Sn : Fe = 1.5 exhibits the best response towards 200 ppm acetone gas under the operating temperature of 270 °C (with gas response Ra/Rg = 9.3), with a fast response/recovery speed (6 s/7 s), as well as excellent reproducibility for at least 15 days without a significant change in response. The applied strategy provides a general and controllable method to access other hierarchically structured multi-metal oxide architectures with intriguing morphologies and adjustable sensing properties.
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
✓ 已验证
产品关联
DOI
高影响因子
ANALYST
·
2022
·Vol. 147
·期 23
·5557-5563
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IF 5.227
Lin Mei,Yanmei Shi,Yange Shi,Pengpeng Yan,Chunlei Lin,Yue Sun,Bingjie Wei,Jing Li
Quantum dots functionalization has been proven to be a simple modification strategy for improving the electroanalytical performance of two-dimensional electrode materials by increasing the specific surface area and active reaction sites. Herein, a new electrochemical sensing platform was fabricated by SnO2 quantum dot-functionalized Ti3C2 MXene (Ti3C2-SnO2QDs) for the highly sensitive detection of Sudan I in food. Ti3C2-SnO2QDs were prepared via in situ synthesis, which can control the nucleation and growth of SnO2QDs, resulting in the well-dispersed SnO2QDs with 2–3 nm size on the intersheet surface of MXene. Moreover, the formation of Ti3C2-SnO2QDs can effectively restrict the aggregation of Ti3C2 and improve the stability of SnO2QDs in aquatic environment. The prepared nanocomposite can be used as an improved modified material to further increase the electrocatalytic performance and electrochemical signal of Sudan I on the surface of a glassy carbon electrode. Under optimized conditions, the proposed analytical method displayed a linear dependence for Sudan I concentration ranging from 0.008 to 10 μM with a detection limit of 0.27 nM (S/N = 3) by electrochemical cyclic voltammetry. This sensor with excellent selectivity, reproducibility and accuracy was quantitatively validated in commercial ketchup and chili powder. This Ti3C2-SnO2QDs-based Sudan I sensor is expected to expand the application of MXene nanocomposites in electrochemical analysis and is envisioned as a promising candidate for monitoring illegal food additives in real food samples.
研究领域:
材料科学
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分析化学
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食品安全
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Nano Materials
·
2022
·
IF 6.14
Weinan Song,Mingxue Zhang,Weiguang Zhao,Qinglu Zhao,Hongshun Hao,Hai Lin,Wenyuan Gao,Shuang Yan
A modification approach is developed based on the idea of molecular imprinting technique to enhance the selective gas sensing performance of nanostructured SnO2 as gas sensors. The modification procedure, conducted on SnO2 microspheres as the porous substrate, involves in situ polymerization and calcination processes. A methanol-templated molecularly imprinted sample (cM-SnO2 MIP) was successfully synthesized via the modification procedure, which demonstrated great difference with its nonmodified counterpart (c-SnO2 MSs) in terms of both surface morphology and internal architecture. Gas sensing performance, including target gas response, selectivity, and dynamic sensing behavior, was investigated to validate the effectiveness of the imprinted cavities for methanol within cM-SnO2 MIPs. Compared to c-SnO2 MSs, the cM-SnO2 MIPs exhibited greatly enhanced methanol sensing selectivity and improved anti-interference ability by up to 2–10 times depending on the types of interference gases. Moreover, the predesigned target gas recognition capability of the molecularly imprinted sensors was proved by changing the template to ethanol and thus obtaining cE-SnO2 MIPs with excellent ethanol sensing selectivity as well as improved anti-interference ability. By constructing a sensor array, the excellent sensing selectivity of these nanostructured SnO2 microspheres was exploited to distinguish the chemically similar molecules, methanol and ethanol.
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
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Zhipeng Wang,Rui Li,Tingting Ma,Shaorun Zhu,Leipeng Gao,Mei Zhang,Min Guo
In SnO 2 -based planar perovskite solar cells (SP–PSCs), stability issue derived by defects at grain boundaries (GBs) and surface in perovskite films has been one of the main reasons that limit its commercialization. Therefore, co-passivation of both defects is pivotal to maximize passivation effects for improving power conversion efficiency (PCE) and stability, which is rarely reported in SP-PSCs. Herein, two simple passivating agents including Pb(SCN) 2 and choline chloride (ChCl) were selected to dually passivate GBs and surface defects in the perovskite films (ambient atmosphere), respectively. The influences of co-passivation on PCE and ambient stability of devices were intensively studied, and the related mechanisms were also elucidated in detail. The dually-passivated device obtained a champion PCE of 19.98%, and maintained about 94% of the initial efficiency after being stored for ˃2700h aging in the humid air. The reduction of GBs and surface defects not only weakens the non-radiative recombination of carriers, but also inhibits the penetration of moisture and oxygen, which ultimately greatly enhances the PCE and stability of the device. This paper provides support for the dual passivation of GBs and surface defects to ameliorate ambient stability of the SP-PSCs, and also enriches the selectivity of passivation agents on dual passivation.
研究领域:
材料科学
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能源技术
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2019
·
IF 8.456
Gaojie Li,Xiaohong Wang,Liuming Yan,Yan Wang,Zhanying Zhang,Jiaqiang Xu
Bimetallic nanoparticles (NPs) usually exhibit some novel properties due to the synergistic effects of the two distinct metals, which is expected to play an important role in the field of gas sensing. PdPt bimetal NPs with Pd-rich shell and Pt-rich core were successfully synthesized and used to modify SnO2 nanosheets. The 1P-PdPt/SnO2-A sensor obtained by self-assemblies of PdPt NPs exhibited temperature-dependent dual selectivity to CO at 100 °C and CH4 at 320 °C. Furthermore, the sensor possessed good long term stability and antihumidity interference. The activation energy of adsorption for CO and CH4 were estimated by the temperature-dependent response process modeled using Langmuir adsorption kinetics, which proved that the lower activation energy of adsorption corresponded to better sensing performance. The gas-sensing mechanism based on the diffusion depth of the tested gas in the sensing layer was discussed. The dramatically improved sensing performance could be ascribed to the high catalytic activity of PdPt bimetal, the electron sensitization of PdO, and Schottky barrier-type junctions at the interface between SnO2 and PdPt NPs. Our present results demonstrate that bimetal NPs with special structure and components can significantly improve the gas-sensing performance of metal oxide semiconductor and the obtained sensor has great potential in monitoring coal mine gas.
研究领域:
材料科学
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化学
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产品关联
DOI
PubMed
高影响因子
MOLECULES
·
2024
·Vol. 29
·期 4
·854
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IF 4.2
Pengfei Chen,Jin Li,Jianing Wang,Lihan Deng
Organic dyes in natural waters jeopardize human health. Whether semiconductor materials can effectively degrade dyes has become a challenge for scientific research. Based on this, this study rationally prepared different nanocomposites to remove organic dyes effectively. Pure SnO2quantum dots, ZnO nanosheets, and SnO2/ZnO (ZS) binary nanocomposites are prepared using the hydrothermal method. Subsequently, SnO2/ZnO@GO (ZSG) ternary composites containing different amounts of GO, i.e., ZSG-5, ZSG-15, and ZSG-25, are synthesized by an ultrasonic water bath method, in which ZS was coupled with GO to form Z-type heterojunctions. The ZSG-15 ternary composites exhibited excellent photocatalytic activity for the degradation of rhodamine B by simulating sunlight. The test results show that the degradation rate of ZSG-15 is about 7.6 times higher than ZnO. The increase in photocatalytic activity is attributed to the synergistic effect of SnO2and GO to improve the separation efficiency of photogenerated carriers in ZnO. Notably, the large specific surface area of GO increases the reactive sites. Compared with binary nanocomposites, ZSG-15 broadens the response range to light while further accelerating the electron transport rate and improving the photoelectric stability.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Scientific Reports
·
2018
·Vol. 8
·期 1
·1-11
·
IF 4.122
Muhammad Nadeem,Rahman Abdul,Younis Muhammad Adnan,Subhani Qamar,Shehzad Khurram,Cui Hairong,Zhu Yan
Nowadays, there are rising concerns about the extensive use of the antibiotics such as chloramphenicol (CAP), has threatened the human life in the form of various vicious diseases. The limited selectivity and sensitivity of confirmatory techniques (UV and electrochemical) and non-fluorescence property of CAP make its determination a challenging task in the modern pharmaceutical analysis. In order to redeem the selective, sensitive and cost-effective fluorescence methodology, here by the dual role of synthesized porous SnO 2 nanoparticles were exploited; (i) a porous sorbent in a µ-QuEChERS based sample preparation and as (ii) a stimulant for the transformation of non-fluorescent analytes namely CAP and p-nitrophenol (p-NP) into their respective fluorescent product. We report a green, simple, selective and cost effective ion chromatographic method for CAP sensitive determination in three complex matrices including milk, human urine and serum. The synthesized sorbent not only selectively adsorbed and degraded the matrix/interferences but also selectively reduced the non-fluorescent antibiotic CAP into a fluorescent species. This developed ion chromatographic method exhibited good selectivity, linearity (r 2 ≥ 0.996) and limit of detection (LOD) was in the range 0.0201–0.0280 µg/kg. The inter- and intraday precisions were also satisfactory having a relative standard deviation (RSDs) less than 14.96% and excellent recoveries of CAP in the range of 78.3–100.2% were retrieved in various complex samples.
研究领域:
分析化学
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药物分析
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环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
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2024
·
IF 5.6
Mujeeb Alam,Danping Jiang,Huan Zhang,Lei Zhang,Faiqa Nadeem,Nadeem Tahir,Chaoyang Lu,Quanguo Zhang
Photo-fermentation offers a promising roadmap for hydrogen production through their ability to harness light energy, however, its lower conversion efficiency is the major bottleneck for its realization. This study investigates the catalytic role of wideband gap nano-photocatalysts (SiC, ZnO, and SnO 2 ) in enhancing hydrogen generation from Arundo donax L. Physio-optical characteristics of SiC, ZnO, and SnO 2 nano-photocatalysts were assessed through SEM, XRD, and FT-IR which confirmed that incorporated nano-photocatalysts are spherical with uniform size distribution and there is no secondary phase. Hydrogen production experiments with varying nano-photocatalyst concentrations revealed that the maximum hydrogen yield of 104 and 98.83 mL/g was achieved with SiC and ZnO, respectively, at loading concentration of 200 mg/L, whereas 69.30 mL/g were observed with 100 mg/L of SnO 2 . The incorporation of SIC, ZnO, and SnO 2 nano-photocatalyst permitted to increase the hydrogen content in overall gas production by 41 %, 37.34 %, and 18.26 % as compared to the control group. The increase in hydrogen production is related to the enhanced e-h pair separation lifetime of SiC, confirmed from PL spectroscopy. Addition of SiC caused a longer availability of electrons that helped to increase the metabolic rate by 38 % and 40.29 % in energy conversion efficiency (ECE). ANOVA results revealed significant differences between the control and maximum values of CHP, HC%, byproducts, and ECE. Tukey pairwise comparisons showed that SiC and ZnO had non-significant differences at 200 mg/L but both significantly outperformed SnO 2 at 100 mg/L. Thus, the selection of suitable catalysts photocatalysts with enhanced e-h pair separation lifetime may offer promising prospects for sustainable energy technologies by enhancing biohydrogen production.
研究领域:
生物技术
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可再生能源
·
光发酵
✓ 已验证
产品关联
DOI
高影响因子
NANOTECHNOLOGY
·
2020
·Vol. 31
·期 25
·255501
·
IF 3.551
Huapeng Wang,Mingpeng Chen,Qian Rong,Yumin Zhang,Jicu Hu,Dongming Zhang,Shiqiang Zhou,Xinbo Zhao,Jin Zhang,Zhongqi Zhu,Qingju Liu
Xylene is a volatile organic compound which is harmful to the human health and requires precise detection. The detection of xylene by an oxide semiconductor gas sensor is an important research direction. In this work, Co3O4 decorated flower-like SnO2 nanorods (SnO2/Co3O4 NRs) were synthesized by a simple and effective two-step method. The SnO2/Co3O4 NRs show high xylene response (Rg/Ra = 47.8 for 100 ppm) and selectivity at the operating temperature of 280 °C, and exhibit high stability in continuous testing. The resulting SnO2/Co3O4 NRs nanocomposites show superior sensing performance towards xylene in comparison with pure SnO2 nanorods. The remarkable enhancement in the gas-sensing properties of SnO2/Co3O4 NRs are attributed to larger specific surface area and the formation of p–n heterojunction between Co3O4 and SnO2. These results demonstrate that particular nanostructures and synergistic effect of SnO2 and Co3O4 enable gas sensors to selectively detect xylene.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2021
·
IF 8.067
Xianghong Chen,Haiying Lu,Yu Lei,Jiakui Zhang,Feng Xiao,Rui Wang,Peiran Xie,Jiantie Xu
To significantly improve the electrochemical performance of tin-based materials as anodes for lithium ion batteries , hybridizing tin-based nanomaterials with carbon is an effective way. This is due to carbon materials serving not only as conductive networks to increase the electrical conductivity , but also as construct void to buffer volume expansion. However, the use of excess carbon in hybrids and the low lithium storage ability of the carbon could lead to the reduced total capacity of the electrode. Herein, we develop a simple and effective approach to the synthesis of EG/SnO 2 - x in which SnO 2 nanoparticles are tightly anchored on the surface of expanded graphite (EG) with well-defined expanded structures and highly conductive frameworks. Benefiting from the rational mass loading of SnO 2 , as well as the high conductivity and strong lithium storage characteristic of EG, the EG/SnO 2 -3 hybrid displays outstanding electrochemical performance with excellent rate capability ( e.g. , 406.3 mAh g –1 at 1 A g −1 ) and long cycling stability ( e.g. , 262.7 mAh g −1 over 500 cycles). In particular, the large proportion of capacity secured from a narrow voltage range of 0.01–0.3 V, corresponding to a low average working potential, is vital for the hybrids applied in high voltage full-cell LIBs.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2021
·
IF 5.316
Hui Wang,Zhi Yang,Wei Guo,Yongqiang Ji,Yun Zhou,Jialin Dang,Minqiang Wang
Recently, SnO 2 is widely used as an attractive electron transport layer in n-i-p planar perovskite solar cells (PSCs) due to its wide bandgap, high transmission, high carrier mobility , favorable band alignment and low annealing temperature. However, a commercial SnO 2 colloid solution suffers from soft agglomerate under long-term storage. Produced film pinholes and oxygen vacancy defect can increase non-radiative recombination at the perovskite/SnO 2 interface limiting the power conversion efficiency (PCE) and stability. Here, amino acid (glycine and alanine) and ammonium salt (ammonium titanium fluoride) are employed to modify SnO 2 nanocrystals and passivate perovskite defects at SnO 2 /perovskite film. The PCE of glycine (GLY) modified device was 19.71% and hysteresis was suppressed compared with that of 16.21% for control device. After 15-day aging at 85% relative humidity (RH), the encapsulated GLY modified device and control device retain 83.58% and 74.52% of their initial efficiency, respectively. Finally a perspective on how to modify SnO 2 with functional molecules toward efficient and stable PSCs is provided.
研究领域:
材料科学
·
能源技术
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2019
·
IF 5.155
Limin Chang,Zheng Yi,Zhaomin Wang,Limin Wang,Yong Cheng
SnO 2 is regarded to be promising for both Li-ion and Na-ion batteries. Thus, it is imperative to fabricate SnO 2 -based anode with improved lithiation reaction kinetics using simple but effective method. Herein, we develop a one-pot hydrothermal route to fabricate two-dimensional SnO 2 nanosheets and the graphene supported SnO 2 nanosheet composite with decreased SnO 2 nanosheet of about 5–10 nm. The ultrathin nanosheet structure anchored on graphene supporting can effectively accelerate the conversion/alloying reaction. Electrochemical researches demonstrate that the reaction kinetics of the lithiation/delithiation reaction can be significantly enhanced by the graphene supported SnO 2 nanosheets. As a result, a capacity of 817.2 mAh g −1 after 100 cycles in the potential window of 0.01 to 3 V are achieved at 500 mA g −1 . The full cell performance and the sodium storage performance are both demonstrated to be good. These promising results suggest that such strategy to fabricate two-dimensional SnO 2 -based anode is of great interest for next-generation Li-ion and Na-ion batteries.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 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）