MICROCHEMICAL JOURNAL
·
2026
·
IF 5.1
Sufaid Shah,Muhammad Sajid,Mobashar Hassan,Zeeshan Muhammad,Xiaojin Zhao,Shahid Hussain,Matin Ashurov,Osama Gohar,Xiaofang Pan
We report a precisely controlled two-step hydrothermal synthesis of stannic oxide (SnO 2 ) nanoparticle-decorated zinc oxide (ZnO) nanorods and a comprehensive study combining experimental analysis with Density Functional Theory (DFT) calculations to explain the improvement mechanism of NO 2 sensing. The optimized ZnO/SnO 2 sensor shows a significantly enhanced response of 249.9 s to 5 ppm NO 2 at 150 °C, a temperature particularly lower than that of many conventional metal oxide sensors, with fast response/recovery times (77/80 s) and outstanding selectivity. Importantly, the sensor demonstrates dynamic performance in humid environments and exceptional long-term stability. DFT calculations disclose that the heterojunction formation enables stronger NO 2 adsorption ( E ads = −1.0 eV) and greater charge transform which is confirmed by density of states analysis. This study provides not only a high-performance sensor candidate for real-world NO 2 detection but also a profound mechanistic insight through the synergy of experimental besides theoretical approaches.
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产品关联
DOI
高影响因子
Nanoscale
·
2026
·
IF 5.1
Xiaohong Jiang,Zhimin GUO,Shiqun ZHANG,Leilei JIA,Yawei WANG,Xinrui ZENG,Yaxin LEI,Hanbin Liu,Guodong Liu,Zhijian Li,Wenliang ZHANG,zhibin lei
The sensor for nitrogen dioxide (NO2) detection plays a crucial role in environmental monitoring and human health. However, traditional oxide-based NO2 sensors often suffer from high operating temperatures, low sensitivity, and inherent rigidity. In this work, a high-performance, wearable NO2 gas sensor that can work at room temperature was developed based on a nanocomposite of single-crystal tungsten oxide (WO3) and tin dioxide (SnO2). The results show that the fabricated SnO2/WO3 based sensor demonstrates superior performance than the bare WO3 sensors. Specifically, the Sn/W-O-12 based sensor shows a remarkable response of 27.5% to 5 ppm NO2, a low detection limit of 218 ppb at room temperature. Furthermore, its response/recovery time to 0.8 ppm NO2 is 63/38 s, respectively. The sensing device also exhibits excellent humidity resistance (50%) and long-term stability (90 days). The enhanced NO2 sensing performance can be attributed to the formation of heterojunction interface, achieved by the dispersion of small-sized SnO2 particles onto WO3 nanorods, which increases the specific surface area and facilitates charge transfer and gas molecule adsorption on the surface. Additionally, a NO2 gas detection and alarm system was constructed to realize the real-time display and alarm functions. This work contributes to the detection of low concentrations of NO2 at room temperature, fostering the development of wearable sensing systems.
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DOI
PubMed
高影响因子
ELECTROCHEMISTRY COMMUNICATIONS
·
2008
·Vol. 10
·期 7
·1052-1055
·
IF 4.186
P. Zhang,H.P. Zhang,G.C. Li,Z.H. Li,Y.P. Wu
We have successfully developed a new process to prepare porous poly(methyl methacrylate-co-acrylonitrile) (P(MMA-AN)) copolymer based gel electrolyte. The porous structure in the polymer matrix is achieved by adding SnO 2 nanoparticles which are mostly used as gas sensor materials. The quasi-aromatic solvent, NMP, has an electron-repulsion effect with the space charge layer on the surface of SnO 2 nanoparticles and forms a special gas–liquid phase interface . Once the cast polymer solution is stored at an elevated temperature to evaporate the solvent, gas–liquid phase separation happens and spherical pores are obtained. The ionic conductivity at room temperature of the prepared gel polymer electrolyte based on the porous membrane is as high as 1.54 × 10 −3 S cm −1 with the electrochemical stability up to 5.10 V (vs. Li/Li + ). This method presents another promising way to prepare porous polymer electrolyte for practical use.
研究领域:
材料科学
·
高分子化学
·
储能技术
·
电化学
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DOI
高影响因子
SOLAR ENERGY MATERIALS AND SOLAR CELLS
·
2022
·
IF 7.305
Linlin Qiu,Deqiang Mei,Wei-Hsiang Chen,Yongfeng Yuan,Lixin Song,Liang Chen,Bing Bai,Pingfan Du,Jie Xiong
SnO 2 is one of the most popular low-cost inorganic electron transport materials for perovskite solar cells . However, the agglomeration of SnO 2 nanoparticles causes their uneven distribution and the existence of pinholes, seriously hindering the electron migration across SnO 2 /perovskite interface and limiting the device performance. The poor wettability between the SnO 2 film and the perovskite precursor solution also impairs the growth of perovskite grains. In this work, an innovative strategy was employed to produce an organic-inorganic hybrid electron transport layer (ETL) by fabricating a high-quality polyvinylpyrrolidone (PVP)/SnO 2 perovskite film with few defects and good wettability. In turn, a PVP-SnO 2 based device exhibits elevated power conversion efficiency (PCE) (18.98%) and adequate reproducibility along with superior operational stability.
研究领域:
材料科学
·
光伏技术
·
纳米技术
·
能源材料
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DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2022
·
IF 9.221
Yi Xia,Lei Xu,Sufang He,Liexing Zhou,Mingjun Wang,Jing Wang,Sridhar Komarneni
2D Transition metal dichalcogenide (TMDs) has been recognized as a potential candidate for constructing wearable and safe room temperature gas sensor. Especially, the heterostructures of TMDs/ metal oxide semiconductors (MOS) have been proved to be potential candidates as NO 2 sensors at room temperature. However, the response/recovery rate and reversibility of the sensors is still not satisfactory due to the inefficient charge transfer on TMDs/MOS hetero-interface. In this study, SnO 2 quantum dots (QDs) were simply decorated on the surface of few or single layer WS 2 nanosheets to form 2D/0D heterostructures via a facile room temperature aqueous solution process and self-assembly method. The 2D/0D WS 2 /SnO 2 heterostructure-based optoelectronic gas sensor showed fast response/recovery rates and full reversibility to NO 2 at room temperature with enhanced response. The remarkable improvement in NO 2 sensing was because of the efficient interfacial charge separation rendered by 2D/0D heterostructures under ultraviolet illumination. Therefore, this study points out a potential strategy for the design of light-enhanced gas sensing materials.
研究领域:
材料科学
·
纳米科技
·
传感器技术
·
半导体物理
·
环境监测
·
光电子学
✓ 已验证
DOI
高影响因子
Materials Today Chemistry
·
2023
·
IF 7.3
S. Tian,X. Cheng,H. Li,M. Wang,X. Wang
Transition metal oxides are regarded as the prospective anode materials for next-generation sodium-ion batteries owing to their high theoretical capacity. Nevertheless, its low conductivity and large volume variation obstruct its practical applications. In this study, a design of heterostructured SnO 2 /SnSe 2 nanoparticles encapsulated by a carbon shell (C/SnO 2 /SnSe 2 @C) synthesized through a templating method and in-situ gas-phase selenization process. The rich heterostructures and the interfacial effect induced by a built-in electric field significantly accelerate reaction kinetics and enhance the reaction activity. When employed as an anode for sodium-ion batteries , C/SnO 2 /SnSe 2 @C electrodes achieve a superior rate performance (238.4 mAh/g at 5.0 A/g) and cycling performance (422.3 mAh/g at 0.1 A/g after 150 cycles; 289.7 mAh/g at 1.0 A/g after 200 cycles). A quantitative examination into the origin demonstrated that the Na + storage is dominated by the fast surface redox reaction , which endows the heterostructure with a durable rate performance. Moreover, based on a dQ/dV analysis and in situ X-ray diffraction results, the C/SnO 2 /SnSe 2 @C anode has a hybrid mechanism of SnO 2 (conversion and alloying reaction) and SnSe 2 (intercalation, conversion, and alloying reactions). This strategy of the heterostructure design provides a potential route to develop high-performance sodium-ion storage materials and sheds light on the behavior of Na-storage mechanisms.
研究领域:
材料科学
·
电化学
·
纳米材料
·
能源存储
·
固态化学
·
界面科学
·
电池技术
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DOI
高影响因子
MATERIALS RESEARCH BULLETIN
·
2013
·
IF 1.913
Peng Dai,Lili Zhang,Guang Li,Zhaoqi Sun,Xiansong Liu,Mingzai Wu
Different loadings of SnO 2 nanoparticles embedded in mesoporous silica (SBA-15) were prepared via a two-solvent method with the ordered hexagonal mesoporous structure of SBA-15 kept. X-ray diffraction, transmission electron microscope, X-ray photoelectron spectroscopy and N 2 adsorption porosimetry were employed to characterize the nanocomposites. Compared with pure SnO 2 nanoparticles, the SnO 2 /SBA-15 nanocomposites show higher response to H 2 at lower operating temperature. The photocatalytic activity of as-prepared SnO 2 /SBA-15 for degradation of methylene blue was investigated under UV light irradiation and the results show that the SnO 2 /SBA-15 nanocomposites have higher photodegradation ability toward methylene blue than pure SnO 2 nanoparticles.
研究领域:
材料科学
·
纳米科技
·
环境催化
·
传感器技术
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DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2016
·
IF 3.205
Yunteng Qu,Can Li,Long Wang,Yunzhi Gao,Jiancun Rao,Geping Yin
We designed and synthesized a layer-by-layer SnO 2 /Pt/graphene electro-catalyst through multi-microwave method. The experimental results show that the activity for the ethanol oxidation strongly depends on the content of graphene and the highest catalytic activity occurs at ∼30 wt%, followed by ∼40 wt%, and ∼20 wt%. Without any other metal component, the ultrathin SnO 2 /Pt/graphene exhibits enhanced not only EOR activity but also durability compared with Pt/graphene. More importantly, the differential electrochemical mass spectrometry (DEMS) study reveals that the layer-by-layer ultrathin SnO 2 /Pt/graphene composites induces improved selectivity to acetic acid (CH 3 COOH) and carbon dioxide (CO 2 ) compared to Pt/graphene. The present work sheds light on ways to optimize electro-catalysts for EOR by smartly tailoring the nanostructure of composition of materials based on platinum, metal oxide and carbon.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2019
·
IF 4.175
Feiming Chen,Zilong Chen,Ziyang Dai,Shaofeng Wang,Zhenbao Zhang,Dengjie Chen
Carbon-encapsulated SnO 2 hollow spheres were fabricated by a self-templating method from Sn spheres for lithium-ion batteries (LIBs). High-temperature annealing (e.g., 700 °C) inevitably led to the formation of Sn on the exterior surface, which was disadvantageous for long-term cycling. In contrast, the preparation at an optimal annealing temperature of 600 °C coupled with subsequent acid etching completely encapsulated the SnO 2 within a carbon shell while maintaining a stable hollow structure. The as-prepared carbon-encapsulated SnO 2 hollow spheres after acid etching (SnO 2 @C–6H) exhibited enhanced electrochemical performance for LIBs characterized by high cycling stability and rate capacity. Specifically, SnO 2 @C–6H displayed a reversible capacity of 897.9 mA h g −1 at 200 mA g −1 after 120 cycles and a promising rate capacity of 549.8 mA h g −1 at a high current density of up to 2000 mA g −1 . The obtained high-performance could be attributed to the formation of a unique hollow structure with an enlarged specific surface area of 215.18 m 2 g −1 and a relatively high degree of graphitization (i.e., I D /I G = 0.84) of the carbon shell. A plausible cause for this performance was that the acquired hollow spheres not only provide a barrier effect for volume expansion and the aggregation of SnO 2 , but also promote lithium storage.
研究领域:
材料科学
·
能源存储
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DOI
高影响因子
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
·
2020
·
IF 3.442
Junhao Zhang,Lili Li,Jiaqi Chen,Nana He,Kaifeng Yu,Ce Liang
The one-dimensional hollow nanostructure can effectively decrease the diffusion distance of lithium ions and alleviate the volume change of SnO 2 during cycling. In this work, SnO 2 /ZnO hollow nanotubes were obtained from two different molecular weights of Polyvinylpyrrolidone (PVP) by combining electrospinning technology and heat treatment. Mechanism studies indicated the hollow nanotubes with different morphology could be controllable by varying the molecular weight of PVP. SnO 2 /ZnO nanotubes with high molecular weight PVP as precursor (SnO 2 /ZnO–H) had smaller diameter and denser structure, which as anode showed better stability and capacity in electrochemical test. The conductivity and stability of SnO 2 /ZnO–H were further improved after coated with Polypyrrole (PPy) by the in-situ polymerization. The reversible capacity of the batteries was improved, and the volume expansion of the metal oxide was restrained during charging and discharging. The SnO 2 /ZnO@PPy anode exhibited a high discharge capacity of 626.1 mA h g −1 of 0.2C after 100 cycles, showing an outstanding stability. Therefore, controllable hollow metal oxide nanotubes structures could be obtained via different the molecular weights of precursor polymer. And the hollow nanotubes after coating by PPy as anode materials exhibited the excellent electrochemical performance . This research provided an idea in further design and optimization of anode microstructure for lithium-ion batteries.
研究领域:
材料科学
·
能源科学
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产品关联
DOI
高影响因子
FUEL
·
2021
·
IF 6.609
Antony Rajendran,Hong-Xia Fan,Tian-You Cui,Jie Feng,Wen-Ying Li
Designing an efficient and selective catalyst for the ultra-deep sulfur removal from liquid fuels under mild conditions is vibrant in environmental catalysis. This work reports the preparation of catalysts, i.e., WO x -based active sites generated on SnO 2 , for the sulfur removal from model diesel via biphasic oxidative desulfurization (ODS). The different active species generated on SnO 2 such as monomeric and polymeric WO x species, and crystalline WO 3 are characterized. Besides being the support, SnO 2 adsorbs the sulfur compounds from the oil phase and boosts the ODS performance. No significant change in the ODS activity of WO x @SnO 2 is observed in the presence of intrusive nitrogen and aromatic compounds. The order of ODS activity towards different sulfur compounds is dibenzothiophene (DBT) > 4,6-dimethyl DBT > benzothiophene. While using SnO 2 with a higher surface area (96.5 m 2 /g) instead of that with a lower surface area (19.2 m 2 /g), the formation of highly efficient polymeric WO x species is enhanced. Consequently, the turn over frequency is augmented from 10.99 to 43.23 h −1 , which is closely a 4-fold increase. The polymeric WO x species produced on SnO 2 having the higher surface area are visualized by HAADF-STEM analysis. Scalable preparation and the higher turnover frequency of the present catalyst can develop a promising catalytic system for the ODS.
研究领域:
环境催化
·
材料科学
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产品关联
DOI
高影响因子
NANOTECHNOLOGY
·
2013
·Vol. 24
·期 34
·345602
·
IF 3.842
Hongtao Cui,Yan Liu,Wanzhong Ren,Minmin Wang,Yunan Zhao
In this work, SnO2 quantum dots with high crystallinity were synthesized on a large scale under mild reaction conditions via an epoxide precipitation route. The SnO intermediate, which was produced in the reactions between epoxide and [Sn(H2O)6]2+, was converted to SnO2 quantum dots by the oxidation of H2O2. It is believed that the protonation and the following ring opening of epoxide promoted the hydrolysis and condensation of [Sn(H2O)6]2+ to form the intermediate. The obtained quantum dots had a maximum specific capacitance of 204.4 F g−1 at a scan rate of 5 mV s−1 in 1 mol l−1 KOH aqueous solution. The electrochemical measurements proved that this high specific capacitance of SnO2 resulted from the Faradaic reactions between SnO2 and the electrolyte. This demonstrates for the first time that SnO2 can be used as a pseudocapacitive electrode material.
研究领域:
材料科学
·
电化学
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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）