CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Weili Ye,Jin Li
Achieving highly selective, highly responsive detection of formaldehyde gas at ppb level at room temperature is highly challenging for air monitoring and life health observation. Therefore, in this paper, low-cost, easy-to-fabricate, highly responsive as well as highly selective Zn 2 SnO 4 /SnO 2 (ZTO/SnO 2 ) metal-oxide semiconductor gas sensors have been successfully prepared by using one-pot hydrothermal method . The results showed that the synergistic effect of the n-n heterojunction formed between ZTO/SnO 2 prepared by this method led to a substantial increase in the sensitivity to the target gases, and ZTO/SnO 2 -3 a higher response (291) to 100 ppm formaldehyde compared to the response values of pure samples of Zn 2 SnO 4 (20.4) and pure SnO 2 (6.99) at room temperature. In addition, the response value for formaldehyde reached about 16.5–295 times higher than that for other common hazardous gases (100 ppm) in our lives. The ZTO/SnO 2 -3 sample with 1 mol/L NaOH was homogeneous and small, exposing as much surface as possible, and the theoretical minimum detection limit was calculated to be 50 ppb. Therefore, the large specific surface area and active adsorption/interaction sites are favorable for gas sensing. This work provides an excellent way to prepare gas-sensitive characteristic sensors using NaOH to improve the surface structure.
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Asia-Pacific Journal of Chemical Engineering
·
2025
·
IF 1.6
ShaoJie Hong,Bin Guo,XiangQian Ren,Yang Cao,XiuMin Xu,Xingfu Zhou
The practical application of conventional Ti/SnO 2 -Sb electrodes is hindered by their low oxygen evolution potential (OEP) and rapid deactivation. Rare earth doping has been proposed to enhance electrode stability and catalytic activity; however, the comparative effects of different rare earth elements (e.g., La vs. Eu) on both structural and electrochemical properties remain unclear. In this paper, the fabrication of lanthanum- and europium-doped Ti/SnO 2 -Sb (TSS) electrodes and the electrochemical degradation of methylene blue (MB) were investigated. Although both lanthanum (La) and europium (Eu) are rare earth elements with many similarities, lanthanum (La)-modified electrode exhibits distinct performance characteristics. It is indicated that the Ti/SnO 2 -Sb-La (TSSL) electrode has a comparatively better crystal phase, enhanced surface hydrophobicity, and better electrochemical performance. The TSSL electrode exhibits a higher OEP of 1.84 V than other electrodes, showing a 0.15 V increase when compared with the undoped electrode. The peak oxidation current reaches 0.82 mA/cm 2 , which provides more active sites for the catalytic reaction. It is found that the La-doped electrode has better performance in wastewater treatment; the TSSL electrode shows a 45% increase in degradation efficiency when compared with the Ti/SnO 2 -Sb-Eu (TSSE) electrode for treatment of 50 ppm MB in 25 min. Moreover, the effects of current density and the initial concentration of MB were also investigated. Considering the degradation rate and energy consumption, the optimum current density for wastewater treatment is 20 mA/cm 2 . The outcome indicated that the degradation of MB was up to 98.5% in 25 min.
研究领域:
电化学
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环境工程
·
材料科学
·
水处理技术
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高影响因子
APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Yangyang Li,Ji Li,Ting Li,Xiaoli Cheng,Yingming Xu,Shan Gao,Lihua Huo
Chlorine (Cl 2 ), a toxic and hazardous gas with a pungent odor, has already posed threat to air quality and human health. Therefore, developing chlorine sensors with high response and low power consumption is crucial. In this work, raspberry-like SnO 2 decorated uniformly with SnS nanoparticles was synthesized via a facile solvothermal method followed by an in-situ sulfurization process, which can be used for highly selective and sensitive detection of Cl 2 at 50 °C. The SnS/SnO 2 sensor exhibits ultrahigh response (R g /R a = 1136) toward 10 ppm Cl 2 at optimal working temperature of 50 °C, achieving low detection limit down to 0.05 pp m (S = 1.52), which is 2.5 times higher than that of pure SnO 2 sensor. Its superior sensing performance can be attributed to the formation of the p-n heterostructure, which accelerates electron transfer within the material. More importantly, the as-prepared SnS/SnO 2 sensor still exhibits effective and stable detection performance toward residual chlorine in daily life, significantly extending its practical applicability and providing valuable reference for developing high-performance near room-temperature gas sensors.
研究领域:
材料科学
·
气体传感技术
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纳米技术
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环境监测
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DOI
高影响因子
Nano Energy
·
2021
·
IF 17.881
Rui Li,Guoqiang Zhang,Yingtao Wang,Zhangwen Lin,Chuanxin He,Yongliang Li,Xiangzhong Ren,Peixin Zhang,Hongwei Mi
Acceleration of reaction kinetics is urgently pursued for high-rate sodium ion batteries, while the utilization of ferroelectric and piezoelectric effect to form local micro electric field to facilitate ion transport has rarely been reported. Herein, a coherent tin oxide/barium titanate heterostructure encapsulated inside nitrogen-doped carbon nanofibers (SnO 2 /BaTiO 3 @NCNF) is introduced as sodium ion battery anode, exhibiting high capacity retention (82% over 2000 cycles at 2 A g 1 ) and stunning long-term cyclability (183.4 mAh g 1 after 10,000 cycles at 5 A g 1 ). The local potential produced by piezoelectric and ferroelectric effect of BaTiO 3 (BTO) can boost sodium ion diffusion kinetics and promote rate performance of SnO 2 anode. The piezoelectric effect is initiated from exploiting the drawback of volume expansion of SnO 2 , while the ferroelectric effect is originated from the charge separation of polarized BTO particles under external electric field. Such principle is instructive for alloying-type and convention-type anodes of alkali-ion batteries.
研究领域:
材料科学
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电化学
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能源存储
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纳米材料
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固态物理
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电池技术
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2025
·
IF 6.3
Yue Hu,Lijiu Cao,Yunpeng Gong,Xu Ma,Yufang Chen,Tao Jin
Formaldehyde sensors represent an effective technology for real-time, online monitoring of formaldehyde concentrations. The selectivity of gas-sensitive materials for formaldehyde is a fundamental determinant of sensor performance and is crucial for the development of formaldehyde sensing technology. In this work, Sn-doped Zn-MOFs were employed to fabricate SnO 2 /ZnO micro-nano materials, and their selective response behaviors to formaldehyde were systematically explored. The results demonstrate that 5 % SnO 2 /ZnO, prepared with 5 % Sn doping, exhibits exceptional selectivity for formaldehyde. Under testing conditions of 170 °C and relative humidity below 60 %, the 5 % SnO 2 /ZnO sensor achieved a selectivity coefficient of 0.87 toward 50 ppm formaldehyde, with a response value of 72.8, response and recovery times of 81/30 s, a linear regression coefficient of 0.9997, and a minimum detection limit of 0.047 ppm. Moreover, the 5 % SnO 2 /ZnO sensor demonstrates excellent selectivity, anti-interference capability, and stability for formaldehyde detection. The enhanced formaldehyde selectivity is attributed to the high specific surface area, abundant pore structure, abundant oxygen vacancies, and n–n heterojunctions present in the 5 % SnO 2 /ZnO composite.
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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环境监测
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气体检测
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DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
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2025
·
IF 9
Bohan Liu,Jiayue Chen,Zhou Zhou,Wanli Cheng,Qinglin Wu,Yiying Yue
A highly flexible lignin-based carbon nanofibrous membrane functionalized with SnO 2 /BiOBr core-shell heterostructure (CNFs@SnO 2 /BiOBr) was fabricated via coaxial electrospinning and solvothermal synthesis. By positioning the SnO 2 precursor in the shell layer during electrospinning, rapid and stable stabilization of the lignin nanofiber at a rate of 1°C/min was achieved, significantly reducing the high-energy consumption constraints of traditional preparation processes. Experimental results demonstrated that the CNFs not only enhance light absorption capacity and promote electron transfer but also effectively suppress the recombination of electron-hole pairs at the SnO 2 /BiOBr heterojunction, thereby improving charge separation efficiency. Under LED light irradiation, the CNFs@SnO 2 /BiOBr membrane exhibited a degradation efficiency of 87.3% for Rhodamine B within 100 min with optimal performance at natural pH (6.2), increasing to 93.0% at pH 3.5. Additionally, the composite membrane maintained a stable efficiency of 84.5% after five cycles at pH 6.2, owing to its outstanding photocatalytic performance and self-supporting structure (tensile strength of 0.601 MPa and elongation at break of 6.10%). This research offers a sustainable approach to designing flexible photocatalytic membranes for wastewater treatment, emphasizing environmental and green significance while enhancing biomass resource efficiency. By improving heterojunction catalytic efficiency and addressing the challenge of recovering traditional powders, it demonstrates promising applications in advancing sustainable wastewater treatment solutions.
研究领域:
环境科学
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材料工程
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纳米技术
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化学工程
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可持续技术
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高影响因子
Analytical Methods
·
2012
·Vol. 4
·期 10
·3283-3289
·
IF 1.547
Daming Sun,Qian Zhao,Feng Tan,Xiaochun Wang,Jinsuo Gao
A novel SnO2 nanoparticles/multi-walled carbon nanotubes/carbon paste electrode (nanoSnO2/MWCNTs/CPE) was prepared for simultaneous detection of dopamine (DA), uric acid (UA), and ascorbic acid (AA) via cyclic voltammetry (CV) and differential pulse voltammetry (DPV). The novel nanoSnO2/MWCNTs/CPE electrode showed high electrochemical catalytic behavior for DA, UA, and AA. The three compounds could be completely separated on the electrode in CV and DPV at optimal conditions. DPV provided larger peak potential separations and higher response sensitivities of DA, UA, and AA compared to CV. In DPV, there are linear relationships between the peak currents and the concentrations in the ranges of 0.3–50 μM for DA, 3–200 μM for UA, and 0.1–5 mM for AA, with the detection limits (S/N = 3) of 0.03, 1, and 50 μM for DA, UA, and AA, respectively. The proposed method was applied for the simultaneous detection of DA, UA, and AA in human urine samples, with recoveries of 91.0%, 97.4%, and 103.0% for DA, UA, and AA, respectively. The relative standard derivations (RSDs, n = 5) were 2.8–4.4%.
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高影响因子
ENERGY & FUELS
·
2022
·
IF 4.654
Zhi-long Xu,Hong-bo Huang,Cai-ling Liu,Shao-hua Luo,Qing-long Wang,Li-guo Jin,Gui-dong Dong,Hai-long Lu
For SnO2 that was used as an anode material for potassium-ion batteries (KIBs), the theoretical capacity is rarely high. However, due to the excessively huge volume expansion of SnO2 in the electrode reaction, the battery capacity decreases sharply, thus impeding its practical application. Here, potassium stannate and glucose were dissolved in the hydrothermal phase and dispersed evenly through a one-step hydrothermal method and then calcined and carbonized at a high temperature in an argon atmosphere to obtain a SnO2@C composite. To obtain an electrode with better performance, SnO2@C/MCB (micrometer carbon ball) composites were synthesized by a similar method. SnO2@C/MCB exhibited a high initial reversible capacity, splendid rate property, and cycling performance in KIBs (the initial capacity remains at 57.2% after 450 cycles). Compared with the SnO2@C material, the SnO2@C/MCB electrode has a higher electrical conductivity, smaller volume change, and better potassium storage capacity.
研究领域:
材料科学
·
能源存储
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Shuqing Nie,Chang Miao,Shi Pan,Guocheng Li,Yu Duan,Wei Xiao
Tin dioxide (SnO 2 )-based materials with renowned conversion-alloying hybrid mechanism represent great potential as anodes for next-generation lithium-ion batteries (LIBs). Nevertheless, their commercial applications are still plagued by fast capacity decay and insufficient rate capability originated from sluggish reaction kinetics and irreversible conversion reaction. Herein, heterogeneous SnO 2 /SnS 2 quantum dots are carefully constructed on graphene oxide (SnO 2 /SnS 2 QDs@GO) via one-step hydrothermal synthesis leveraging well-matched bandgaps of SnO 2 and SnS 2 , in which GO not only provides enough negative charges to restrict the nucleation of QDs, but also is employed as robust conductive network to reinforce the structural stability of the electrode. Experimental and first-principles calculation results confirm that the constructed heterointerface promotes electronic conductivity and accelerates interfacial charge transfer kinetics while simultaneously lowering Li 2 O decomposition energy barrier to realize high reaction reversibility, ultimately favoring excellent rate capability and cyclability. Moreover, the built-in electric field induced by SnO 2 /SnS 2 heterojunction greatly boosts electronic/ionic transport kinetics. Endowed with the elaborate structure combining intrinsic and extrinsic advantages, the cell assembled with SnO 2 /SnS 2 QDs@GO electrode presents high reversible capacity of 1216.9 mAh g −1 after 100 cycles at 0.1 A g −1 and desirable long-cycle stability over 1500 cycles at 5.0 A g −1 . Therefore, this work may provide new insights into engineering semiconductor-based heterojunction anode for advanced LIBs.
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高影响因子
Coatings
·
2022
·Vol. 12
·期 8
·1111
·
IF 3.236
Angang Song,Yiwen Wang,Suxiang Liu,Qinpu Wang,Junhua Hu
In this study, remote plasma sputtering deposition of niobium-doped SnO2transparent conductive oxides on glass substrates was carried out at ambient temperature with no post-deposition annealing. The microstructure, optical, electrical, and surface morphology of the thin films were characterized using a combination of advanced techniques, such as X-ray diffraction (XRD), UV-Vis spectrophotometer, Hall-effect measurements, as well as field emission scanning electron microscope (FESEM), high-resolution transmission electron microscopy, and high-resolution X-ray photoelectron spectroscopy. It was determined that the oxygen defects of the films have a substantial impact on their transparent conductivity. The crystalline films, which were crystallized by annealing at 450 °C, had higher resistivities due to a decreased concentration of oxygen vacancies, which restricted conduction. In comparison, the amorphous films exhibited remarkable conductivity. The best amorphous films (Nb:SnO2) exhibited a resistivity of less than 4.6 × 10−3Ω·cm, with a 3 × 1020cm−3carrier concentration and a 4.4 cm2/(V·S) of Hall mobility. X-ray amorphous Nb:SnO2films can be used to make conductive and transparent protective layers that can be used to shield semiconducting photoelectrodes used in solar water splitting. These layers can also be used with more conductive TCO films (ITO or AZO) when needed.
研究领域:
材料科学
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薄膜技术
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半导体物理
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表面化学
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可再生能源材料
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DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2020
·
IF 3.28
Xiao-mei Zhang,Wei-long Zhang,Hui Yu,Xiang-ting Dong,Long Xia
The porous Eu(TTA) 3 (TPPO) 2 /SnO 2 (ETTS, TTA: 2-thenoyltrifluoroacetonate and TPPO : triphenylphosphine oxide) composite was prepared via sol-gel method with tetraethyl orthosilicate (TEOS) as catalyst which showed the cumulate litchi shell-like structure. The Eu(TTA) 3 (TPPO) 2 organic complexes (ETT) could be absolutely distributed into the pores of the SnO 2 matrix at the molecular level through sol-gel process. SiO 2 was used as the hard template which was removed to increase porosity during the prepared process. The red emission of ETTS was exhibited under the 368 nm excitation light, and much better luminescence properties was shown after washing off SiO 2 (ETTS-W) which was about 4 times of unwashed ETTS (ETTS-UW) and 15.6 times of ETT for 615 nm emission when Eu content was 6 wt%. The excellent luminescence property of ETTS-W samples was mainly attributed to the organic ligands, the pore structure after removing SiO 2 and stronger ultraviolet absorption capacity of SnO 2 matrix.
研究领域:
材料科学
·
光学
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高影响因子
Solar RRL
·
2021
·Vol. 5
·期 7
·2100067
·
IF 8.582
Congcong Liu,Haijun Su,Keyu Xie,Hongqiang Wang,Peng Zhai,Ninghui Chang,Shan Zhang,Qingfu Ban,Min Guo,Jun Zhang,Lin Liu
SnO 2 aqueous colloids as electron transport layers (ETLs) have been widely employed in planar perovskite solar cells (PSCs). However, the surface defects and energy level mismatch at the SnO 2 ETL/perovskite interface are still great challenges for the power conversion efficiency (PCE) improvement. Herein, a natural and nontoxic phytic acid (PA) compound is introduced into the SnO 2 aqueous colloids to prepare the ETL to depress its defects, and systematically study the influence of different PA complexation on the photovoltaic performance of PSCs. The results demonstrate that PA complexation can assemble unique coordination complexes between PA and SnO 2 nanocrystals (NCs) in a new bonding of Sn O P, which can passivate SnO 2 inherent surface defects and tune the electronic properties of SnO 2 ETLs. PA complexation can significantly disaggregate the SnO 2 oligomers and reduce the cluster size distribution from 98.37 to 15.87 nm. Meanwhile, the reduction of surface trap states inhibits the potential barriers, thus the electrical conductivity is about two times as high as compared with the pristine SnO 2 ETLs. Consequently, a high PCE of 21.43% in PA-SnO 2 -based PSCs is obtained, which presents an improvement of 10.9% over that of the pristine SnO 2 -based PSCs.
研究领域:
材料科学
·
能源研究
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DOI
高影响因子
危险品化学品经营许可证（带存储）