ACS Applied Materials & Interfaces
·
2019
·
IF 8.456
Hui Li,Shushu Chu,Qian Ma,Yuan Fang,Junpeng Wang,Quande Che,Gang Wang,Ping Yang
Morphology-tunable C–N/SnO2-based hierarchical microspheres with good gas sensitivity for triethylamine (TEA) have been fabricated via facile electrospinning and a subsequent calcination process. The reaction temperature and modifying calcining technology played a dominant role for the morphological evolution from precursor fibers to microspherical shapes and the formation of C–N-decorated SnO2 phase composition. C–N/SnO2/ZnO composites with tunable crystallinity, microstructure, and gas-sensing performance were strictly dependent on the added amount of Zn element. Fascinatingly, the constructed C–N/SnO2/ZnO/Au composites can not only precisely regulate the crystal size, dispersion status, loading position, and content of Au nanoparticles but also display excellent gas-sensing properties with ultrasensitivity and high selectivity under various temperature detections. The response of C–N/SnO2/ZnO/Au composites can reach up to approximately 1970, calculated to be 121.6 and 23.6 times for 50 ppm TEA molecules at optimal conditions compared with C–N/SnO2 and C–N/SnO2/ZnO microspheres, respectively, actually representing the highest response value at high temperatures reported to date. The superior long-aging stability of sensing behaviors and phase structures can be also observed after 1 month. More importantly, novel C–N/SnO2/ZnO/Au sensors were employed for availably detecting low-concentration volatiles released from the storage procedure of fishes at 80 °C, indicating the practical application in chemical detectors and biosensors at low temperature. The novel gas-sensing mechanisms derived primarily from the combination of phase compositions, morphologies, and unique surface/interface transfer processes of C–N/SnO2/ZnO/Au composites are presented and investigated in detail, which will contribute to the design and development of other semiconductor-based composite sensors.
研究领域:
材料科学
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传感器技术
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纳米科技
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DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2021
·Vol. 32
·期 24
·28891-28908
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IF 2.478
Liu Guangdi,Cui Xiuxiu,Yao Lijia,Zhao Rongjun,Tian Xu,Li Diquan,Sun Chunyan,Wang Yude
This paper reports the synthesis of ZnO-SnO 2 nanocomposites modified by PdO nanoparticles named PdO-ZSO which are prepared by the one-step hydrothermal method at 160 °C for 12 h and gas sensing test to H 2 and C 4 H 10 inflammable gas. Meanwhile, PdO-ZSO nanoparticles are XRD, SEM, TEM, EDS, XPS and other characterization methods to further explain its morphological formation process. As the sensing materials, PdO-ZSO exhibits extraordinary gas sensing behaviors for hydrogen (H 2 ) and butane (C 4 H 10 ) and the response reaches 98 and 58 to H 2 and C 4 H 10 at operating temperature of 370 °C, respectively. And the response time and recovery time are both less than 2 s and 4 s respectively, with good repeatability and outstanding long-term stability. The existence of PdO is able to increase the resistance modulation range of heterostructure. And the enhanced gas sensing performances can be ascribed to the catalysis of noble metal doping and the formation of ternary heterostructure between PdO and ZnO-SnO 2 nanocomposites.
研究领域:
材料科学
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化学工程
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DOI
高影响因子
Nano Materials Science
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2025
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IF 17.9
Haineng Bai,Cheng Feng,Yiru Chen,Yunxiao Du,Yamin Feng,Kuili Liu,Yali Yan,Jia Liu,Baohua Zhang,Jin Wang,Dunjun Chen,Youdou Zheng,Fuqiang Guo
The porous NiO nanoplates modified with rGO nanosheets and SnO 2 nanoparticles are developed for accurate and rapid ppb-level NO 2 detection. The developed SnO 2 /NiO/rGO sensor towards 50 ppm NO 2 gas demonstrates an excellent gas-sensing response of 14.8 at 23 °C, which is 3.03 times that of NiO/rGO sensor (4.89) and 6.49 times that of NiO sensor (2.28), respectively. The developed SnO 2 /NiO/rGO sensor exhibits faster response/recovery speed (12.7/32.8 s @5 ppm), with extra-low theoretical detection limit of 0.15 ppb at room temperature. More fascinatingly, our sensors indicate great sensitivity, outstanding repeatability and long-term stability for longer than 7 weeks. Additionally, it also suggests that 1 °C and 1 % relative humidity have the same effect on the SnO 2 /NiO/rGO sensor signal as approximately 13 ppb and 7.0 ppb NO 2 gas change, respectively. Such excellent properties are mainly attributed to the large surface-to-volume ratio, which provides active sites to NO 2 gas spread, adsorption and diffusion on material surface in redox reaction. Moreover, the ternary heterojunctions formed by NiO, rGO and SnO 2 may serve as highly conductive channels to accelerate carrier transfer and abundant oxygen vacancies to reduce the adsorption energy for O 2 and NO 2 gas, thus further improving performance of the sensors.
研究领域:
材料科学
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传感器技术
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环境监测
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产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2025
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IF 9.7
Wisal Muhammad,Nazma Faqir,Muhammad Asif Khan,Zaheen Ullah Khan,Bilal Ahmad,Muhammad Jawad Ahmad,Amir Zada,Fawad Ali,Sajid Nadeem,Muhammad Zaka Ansar,Wajid Ali
Developing an efficient visible-light-driven photocatalysts for conversion of atmospheric CO 2 into valuable fuels is a promising strategy to mitigate the escalating greenhouse gas, environmental, and energy crisis. This study presents an innovative design for a cascade Z-scheme comprising of dimensional matched SnO 2 -α-Fe 2 O 3 /g-C 3 N 4 (SO-FO/CN) nanosheets heterojunction. In this configuration, SnO 2 functions as an optimal energy platform that not only facilitates charge transfer and separation but also sustains sufficient thermodynamic energy for redox reactions and inhibits the undesired type-II charge transfer pathway. The optimized cascade Z-scheme exhibits a remarkable 20-fold improved photoactivity for CO 2 conversion to CH 4 and CO compared to bare g-C 3 N 4 (CN). It also shows significantly improved photocatalytic activity for the degradation of toxic organic pollutants, 2,4-dichlorophenol (2,4-DCP) ∼6.6-fold and bisphenol A (BPA) ∼4.2-fold, respectively. The improved photocatalytic activity results from effective charge separation facilitated by the Z-scheme, along with a favorable energy platform and extended charge lifetime. This innovative strategy, which utilize an energy platform, presents a promising approach for designing an efficient Z-scheme heterojunction photocatalysts for solar-to-fuel conversion and pollutant degradation.
研究领域:
材料科学
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环境科学
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能源科学
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产品关联
DOI
PubMed
高影响因子
LANGMUIR
·
2025
·
IF 3.9
Yunlei Cen,Yuanyuan Zhou,Mingshi Zhu,Ke Zheng,Shaoqi Zhou
In this work, Ti/TiO2-RNTs/SnO2–Sb–Ni-La electrodes were developed in three deposition stages. TiO2-RNTs improved the bonding of the bottom layer, and Ni–La codoping resulted in higher film stability. Compared with other electrodes, this electrode exhibits excellent performance with a denser structure, higher OEP (2.17 V), lower Rct (5.36 Ω), longer electrode strengthening life, and larger active specific surface area. The degradation of oily wastewater revealed an oil removal rate equal to 97.88% under optimal conditions. In comparison to the Ti/TiO2-RNTs/SnO2–Sb obtained via the one-step hydrothermal technique, the service life improved by 8.60 times, and the degradation rate (RD) of the current electrode (k = 0.0254 min–1) was enhanced by 2.67 times, whereas the removal rate remained stable after 10 cycles. Under the continuous attack of free radicals such as •OH, 48 types of organic matter in wash oil were decomposed, and most of the alkanes and polycyclic aromatic hydrocarbons were mineralized. Compared with direct current, pulse current electrolysis of the oil-washing wastewater can save 47.95% electrical energy, and the energy consumption of chemical oxygen demand removal per unit mass can be reduced by 72.02%. Therefore, the Ti/TiO2-RNTs/SnO2–Sb–Ni-La pulse electrochemical oxidation method is expected to reduce energy loss and improve the electrochemical treatment of oily wastewater.
研究领域:
环境科学
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电化学工程
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产品关联
DOI
PubMed
高影响因子
Acta Biomaterialia
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2021
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IF 8.947
Cunji Gao,Wenwei Guo,Xiaolu Guo,Zhaoyang Ding,Yanwen Ding,Xing-Can Shen
The shallow penetration depth of photothermal agents in the first near-infrared (NIR-I) window significantly limits their therapeutic efficiency. Multifunctional nanotheranostic agents in the second near-infrared (NIR-II) window have drawn extensive attention for their combined treatment of tumors. Here, for the first time, we created oxygen-deficient black SnO 2−x with strong NIR (700–1200 nm) light absorption with NaBH 4 reduction from white SnO 2 . Hyaluronic acid (HA) could selectively target cancer cells overexpressed CD44 protein. After modification with HA, the obtained nanotheranostic SnO 2-x @SiO 2 -HA showed high dispersity in aqueous solution and good biocompatibility. SnO 2−x @SiO 2 -HA was confirmed to simultaneously generate enough hyperthermia and reactive oxygen species with single NIR-II (1064 nm) light irradiation. Because HA is highly affined to CD44 protein, SnO 2-x @SiO 2 -HA has specific uptake by overexpressed CD44 cells and can be accurately transferred to the tumor site. Furthermore, tumor growth was significantly inhibited following synergistic photodynamic therapy (PDT) and photothermal therapy (PTT) with targeted specificity under the guidance of photoacoustic (PA) imaging using 1064 nm laser irradiation in vivo . Moreover, SnO 2−x @SiO 2 -HA accelerated wound healing. This work prominently extends the therapeutic utilization of semiconductor nanomaterials by changing their nanostructures and demonstrates for the first time that SnO 2-x based therapeutic agents can accelerate wound healing. Statement of significance The phototherapeutic efficacy of nanotheranostics by NIR-I lightirradiation was restricted owing to the limitation of tissue penetration and maximum permissible exposure. To overcome these limitations, we hereby fabricated a NIR-IIlight-mediated multifunctional nanotheranostic based on SnO 2 −x. The introduction of oxygen vacancy strategy was employed to construct full spectrum responsive oxygen-deficient SnO2−x, endowing outstanding photothermal conversion, and remarkable production activity of reactive oxygen species under NIR-II light activation. Tumor growth was significantly inhibited following synergistic PDT/PTT with targeted specificity under the guidance of photoacoustic imaging using 1064 nm laser irradiation in vivo . Our strategy not only expands the biomedical application of SnO 2 , but also providea method to develop other inorganic metal oxide-based nanosystems for NIR-II light-activated phototheranostic of cancers.
研究领域:
生物医学工程
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肿瘤学
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纳米医学
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产品关联
DOI
PubMed
高影响因子
ELECTROCHIMICA ACTA
·
2018
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IF 5.116
Fengyan Xie,Jingjing Wang,Yafeng Li,Jie Dou,Mingdeng Wei
Hierarchical SnO 2 /TiO 2 composite hollow microspheres were synthesized via one-step hydrothermal route by using titanium tetrabutoxide as titanium source and potassium stannate and tripolycyanamide as co-additive, and the samples were characterized by XRD, BET, SEM and TEM measurements. The results denoted that the synthesized microspheres with a diameter of ca 500–1000 nm were assembled by thin nanosheets and possessed a large surface area of 199.3 m 2 g −1 . In addition, EDX and element mapping measurements indicated that a small amount of SnO 2 nanoparticles uniformly distributed among the nanosheets of microspheres. The hierarchical microspheres simultaneously facilitated dye adsorption, light harvesting, and electron transport , giving rise to a high photovoltaic conversion efficiency of 8.70% when applied as scattering layer for dye-sensitized solar cells, which was a 28.1% improvement compared to that of bare nanocrystalline TiO 2 (6.79%, Dyesol) based cell.
研究领域:
材料科学
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能源科学
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DOI
高影响因子
SOLAR ENERGY
·
2020
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IF 4.608
Yue Qiang,Yahong Xie,Ying Qi,Peng Wei,Haokun Shi,Cong Geng,Haichao Liu
SnO 2 (Tin oxide) is one of the most successful electron transport layer (ETL) materials in perovskite solar cells (PSCs) because of its low sintering temperature and simple preparation process. Similarly, carbon-based hole transport material-free PSCs (C-PSCs) have been widely studied because of their excellent stability and low price. Therefore, C-PSCs having SnO 2 as ETL can be envisaged as a promising PSCs system for commercial flexible equipment. However, studies on this system are still scarce because of its low power conversion efficiency (PCE). In this paper, the electron lifetime and current (J sc ) of a PSC containing a Li-SnO 2 /Al 2 O 3 + CH 3 NH 3 PbI 3 /carbon structure are greatly improved by doping lithium into SnO 2 (Li-SnO 2 ) and sandwiching an Al 2 O 3 interlayer into the Li-SnO 2 ETL and CH 3 NH 3 PbI 3 . A PCE of 10.01% is obtained, which is 42.3% higher than a PSC having a SnO 2 /CH 3 NH 3 PbI 3 /carbon structure. The entire preparation process is very simple and is carried out in an air atmosphere below 200 °C (20–40% humidity).
研究领域:
材料科学
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太阳能
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纳米技术
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DOI
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2024
·Vol. 31
·期 14
·21632-21645
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IF 0
He Yuanzhen,Zhong Dengjie,Xu Yunlan,Zhang Jiayou,Jiang Ran,Liao Pengfei
In this paper, La-doped Ti/SnO 2 -Sb 2 O 4 electrode was prepared by electrodeposition and used for electrochemical degradation of rhodamine B. The optimum preparation conditions of the electrode were optimized as deposition time of 15 min and calcination at 500 ℃ for 2 h. The water treatment conditions were selected as initial pH 3.0, electrolyte Na 2 SO 4 concentration 0.1 M, current density 30 mA cm −2 , and initial rhodamine B concentration 20 mg L −1 ; the color and TOC removal of RhB reached 99.78% and 82.41% within 30 min. The FESEM, XRD, XPS, CV, LSV, and EIS characterization studies demonstrated that Ti/SnO 2 -Sb 2 O 4 -1%La electrode had a dense structure and the highest oxygen evolution potential (2.14 V) and lowest charge transfer resistance (0.198 Ω cm −2 ), indicating that doped La has lower energy consumption. Moreover, La doping can expand the specific surface area, active site, performance of pollutant degradation, and service life of the electrode. Especially, the service life of Ti/SnO 2 -Sb 2 O 4 -1%La is increased by three times, and the maximum life span reaches 90 min (1000 mA cm −2 , 1 M H 2 SO 4 ). Free radical quenching experiments show that ·OH plays a major role in the degradation of RhB. The Ti/SnO 2 -Sb 2 O 4 -1%La electrode prepared in this paper and its results will provide data support and reference for the design of efficient electrocatalytic electrode. Graphical
研究领域:
电化学
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环境科学
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材料科学
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水处理技术
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DOI
SENSORS AND ACTUATORS B-CHEMICAL
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2023
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IF 8.4
Wanjing Wang,Jianbiao Xian,Jin Li,Mengfang Yu,Qiutian Duan,Chung Ming Leung,Min Zeng,Xingsen Gao
In this work, Co 3 O 4 /SnO 2 heterojunctions were proposed and fabricated by single-nozzle electrospinning. Interestingly, novel yolk-shell nanofibers could be formed in a proper doped content of Co 3 O 4 . The gas sensing properties of sensors based on Co 3 O 4 /SnO 2 yolk-shell nanofibers were evaluated, and a superior response of ∼216–100 ppm acetone at 350 °C was obtained. Additionally, Our sensors have an ultrafast response time of ∼0.62 s, demonstrating remarkable selectivity for acetone and excellent stability for both humidity and long-term use. These exceptional performances are attributed to the synergistic effect of nano-heterojunctions that enhance the effective interfacial area , as well as the unique yolk-shell structure of SnO 2 /Co 3 O 4 , which increases gas transport channels. Our results demonstrate that constructing Co 3 O 4 /SnO 2 yolk-shell nanofibers is an effective strategy for achieving high-performance acetone gas detection.
研究领域:
材料科学
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纳米技术
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气体传感
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产品关联
DOI
高影响因子
JOURNAL OF ELECTRONIC MATERIALS
·
2021
·Vol. 51
·期 1
·214-222
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IF 1.938
Tian Chunxia,Tian Xi-ang,Li Yu,Wang Zhijun,Liu Li
Porous SnO 2 with high sensitivity and fast response has attracted much attention. Herein, we prepared 3D porous SnO 2 using carbon balls as a template and studied the effects of sintering time (1 h, 2 h, 3 h, 4 h) at a certain calcination temperature of 500℃ and Ho doping on the gas-sensing performance of 3D porous SnO 2 . The gas-sensing test results show that, compared with the samples obtained under other sintering time, the gas-sensing property of 3D porous SnO 2 calcined for 2 h has the highest gas sensitivity of 31 in the 50-ppm formaldehyde environment. Among the samples doped with Ho, 3D porous SnO 2 with a doping amount of 3.5% has the highest sensitivity of 65 at operating temperature of 230℃, which is twice as long as pure 3D porous SnO 2 with a calcination time of 2 h. Moreover, the sample has good selectivity, low detection limit, and good linearity. These excellent gas-sensing characteristics are mainly due to the unique morphology of 3D porous SnO 2 , more oxygen vacancies, and the influence of Ho doping. Therefore, the gas-sensing performance of the metal oxide semiconductor material can be further improved by forming the porous nanocomposite material. Graphical Abstract
(a) Response recovery time of SnO 2 obtained under different calcination times; (b) Response recovery time of SnO 2 doped with different Ho content.
研究领域:
材料科学
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纳米技术
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化学传感器
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产品关联
DOI
高影响因子
Journal of Physical Chemistry C
·
2021
·
IF 4.126
Huanhuan Zheng,Yijin Wang,Bingqiang Niu,Rui Ge,Yimin Lei,Lihe Yan,Jinhai Si,Peng Zhong,Xiaohua Ma
The defect control of polycrystalline perovskite films is essential for achieving an efficient and stable perovskite solar cell (PSC). However, existing methods of reducing defects suffer from their complex processes, low durability, and limited effects by using molecular materials in terms of passivation mechanisms. Herein, a hybrid film composed of SnO2 nanoparticles/Ti3C2Tx MXene nanoflakes is used as the electron transport layer (ETL) in a planar regular-structure PSC. The results indicate that by changing the Ti3C2Tx/SnO2 ratios (0–2.2 wt %) in ETLs, the film qualities of top perovskite layers are controllable, including the compactness, crystal size, surface roughness, crystallinity, optical absorption, defect density, and so forth. The defect density in perovskite films is substantially reduced from 5.65 × 1015 to 2.25 × 1015 cm–3 using an optimized hybrid ETL (1.4 wt %) compared with the pristine SnO2, while the electrical conductivity of the hybrid ETL is decreased probably due to the geometric factor of the incorporated MXene. As a result, the power conversion efficiency of PSCs is significantly increased from 16.28 to 20.35%, and the environmental stability of the unencapsulated devices is greatly improved. This work provides a facile, robust, and effective way to reduce defects in perovskite films by using emerging MXene nanomaterials and might also be useful to other perovskite-based (opto)electronic devices such as light-emitting diodes and photodetectors.
研究领域:
材料科学
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光伏技术
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纳米技术
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可再生能源
✓ 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）