RESEARCH ON CHEMICAL INTERMEDIATES
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2017
·Vol. 43
·期 9
·5217-5228
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IF 1.369
Qin Na,Jing Kaiqiang,Chen Rui,Xiong Jinhua,Liang Ruowen,Li Zhaohui,Wu Ling
Abstract SnS 2 /SnO 2 nanocomposites have been successfully prepared via a hydrothermal method using electrospun SnO 2 nanotubes as both substrates and reactants. The ratios of the nanocomposites are controlled by varying the concentration of thioacetamide during the solvothermal synthesis processes. The as-prepared SnS 2 /SnO 2 nanocomposites exhibit considerable improvement on the photocatalytic activities for the reduction of aqueous Cr(VI) under visible light irradiation. Their photoactivities are also much higher than that of SnS 2 nanoplates and a physical mixture of SnO 2 and SnS 2 . In particular, the SnS 2 /SnO 2 -B sample exhibits the highest photocatalytic activity. After visible light irradiation for 60 min, the reduction rate has reached about 100%. The photoelectrochemical analyses further show that the high photocatalytic activity of the SnS 2 /SnO 2 -B sample can be ascribed to the unique structural features and the intimate interfacial contact between SnS 2 and SnO 2 , which is more effective separation of the photo-generated carriers. Graphical Abstract
研究领域:
材料科学
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环境科学
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化学工程
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产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Yingyue Wang,Guojian Zhang,Jinyang Huang,Mengying Long,Dongmin An
In this paper, pure SnO 2 and SnO 2 composite materials (ZSnO 2 ) modified with different amounts of ZIF-67 (20 mg, 60 mg) were synthesized utilizing a simple solvothermal method. The gas sensing performance of these sensitive materials was tested, and the results manifested that at a low operating temperature of 170 ℃, the responses of ZSnO 2 -60 and ZSnO 2 -20–50 ppm triethylamine (TEA) gas reached 142.6 and 83.7, respectively, which was ∼3.81 and ∼2.24 times that of pure SnO 2 (34.7). In addition, both doped samples had lower operating temperature, excellent selectivity and repeatability towards TEA gas. The doping of ZIF-67 led to oxygen vacancies increasing, specific surface area amplifying and p-n heterojunctions forming between Co 3 O 4 and SnO 2 in ZSnO 2 nanocomposites. These synergistic effects enhanced the gas sensitivity of ZSnO 2 nanocomposites to TEA gas.
研究领域:
材料科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2017
·
IF 5.401
Li Xiao,Shengrui Xu,Geng Yu,Shantang Liu
A novel gas microsensor combining SnO 2 submicron/nanostructured porous sensitive film with Micro-Electro-Mechanical systems (MEMS) microheater was successfully fabricated. The film was made of hierarchically mixed Pd/SnO 2 (HM-PTO) composites composed of Pd/SnO 2 hollow submicrospheres (Pd/SnO 2 -HSs) and Pd/SnO 2 nanoparticles (Pd/SnO 2 -NPs) deposited on the microheater platform using the microdispensing method. The as-prepared HM-PTO sensors exhibited high sensitivities, fast response/recovery rates, good selectivity, reliable reversibility, and relevant stability towards ethanol at low power consumption. The resulting superior sensing performances were attributed to the unique hierarchical structure. The internal void architecture of Pd/SnO 2 -HSs provided large specific surface areas, proper mesopore size distribution, large number of active adsorption/interaction sites, as well as promoted the chemisorption and dissociation of gas molecules due Pd-doping to yield superior gas response. In particular, the nano-sized SnO 2 particles ensured the uniform deposition of the materials to yield enhanced local conductivities, and possibly faster phase transfer reactions responsible for the extremely good response/recovery performance. This simple fabrication procedure combined with high sensing performances look promising for the development of hierarchical morphologies of novel materials for gas sensing applications.
研究领域:
材料科学
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传感器技术
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2020
·
IF 6.182
Yongheng Du,Yanfeng Zhang,Ling Li,Ning Wang,Yujun Chai
The combination of Sb 2 O 3 or SnO 2 with graphene has become a research hotpot in recent years. However, several problems, namely the loading of the active materials, space utilization in composites, and the intrinsic volume expansion of Sb 2 O 3 and SnO 2 , have yet to be fully resolved. To overcome these disadvantages, in this work Sb 2 O 3 /carbon nanotubes (CNTs)/SnO 2 composite have been synthesized, in which the CNTs act as a network to ensure the electronic conductivity and buffer of the volume expansion. The SnO 2 nanoparticles are aligned by the CNTs and Sb 2 O 3 is dispersed in the voids between them. Space utilization and the loading of the oxides are thereby maximized. Moreover, the resultant composite retains small amount of water or alcohol, which does not affect the cyclic stability, but may have increased the ionic and electronic conductivity, improving the electrochemical performance. A discharge capacity of 910 mAh g −1 after 250 cycles at 100 mA g −1 is realized for Sb 2 O 3 /CNT/SnO 2 . Moreover, the contribution of the pseudocapacitance to the rate discharge capability is obvious, which arises from the different heterointerfaces between Sb 2 O 3 /CNTs, CNTs/SnO 2 or Sb 2 O 3 /SnO 2 . The homogenous distribution of Sn and Sb in CNTs after cycling leads to a lower discharge voltage, improving the application prospects. Although some collapse and cracks are detected, the CNTs network connects the oxides, ensuring the structural stability and the cyclic stability of Sb 2 O 3 /CNT/SnO 2 . This strategy represents a new concept for the design of multi-component materials for lithium storage.
研究领域:
材料科学
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能源存储
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2022
·Vol. 33
·期 6
·3237-3249
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IF 2.779
Wang Siyu,Guo Jiaxiong,Lin Zhidong,Liu Liming,Hui Yuchong,Zhang Xiaowen
A series of very small grain Au/SnO 2 composites were synthesized by a facile hydrothermal method. The microstructure of the Au/SnO 2 composites were characterized by X-ray diffraction, scanning electron microscope, transmission electron microscopy, and nitrogen adsorption–desorption experiment. The composites were composed of 20–30 nm spherical nanoparticles, which are hierarchical structure composed of 8 nm Au cores and 5 nm SnO 2 nanograins. The composites were porous material with large specific surface area. The sensors based on the Au/SnO 2 composites showed high sensitivities and selectivity to n -butanol at low working temperature with fast response. Among these sensors, the 1.5 wt% Au/SnO 2 -based sensor shows the highest response (2662.8) to 100 ppm n -butanol with the response time of 35 s at 80 °C. The excellent low-temperature gas-sensing properties of the Au/SnO 2 sensors can be ascribed to the synergetic effect of high surface energy of small SnO 2 nanograins and catalysis of gold nanoparticles. Our study demonstrates that controlling the grain size of SnO 2 and Au nanoparticle-assisted gas sensing are effective methods to improve the sensing properties of SnO 2 at low working temperature. The 1.5 wt% Au/SnO 2 composite is a potential low-temperature gas-sensing material for n -butanol detection.
研究领域:
材料科学
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传感器技术
✓ 已验证
产品关联
DOI
高影响因子
Chemistry-An Asian Journal
·
2023
·Vol. 18
·期 10
·e202300085
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IF 4.1
Weihong Wang,Fanyue Song,Chunfang Du,Yiguo Su
Graphical A sustainable Fe 2 O 3 /SnO 2 composite with fine interfacial feature was prepared and employed for durable peroxymonosulfate activation to eliminate tetracycline. Fe 2 O 3 /SnO 2 displayed the excellent stability and degradation performance due to the synergistic effect between Fe 2 O 3 and SnO 2 . Sustainable Fe 2 O 3 /SnO 2 with fine interfacial feature derived from FeSnO(OH) 5 was prepared and employed for elimination contaminants. The synergistic effect between Fe 2 O 3 and SnO 2 endowed a remarkable degradation performance for tetracycline degradation. Well dispersed SnO 2 can function as fine protective layer to enhance the anchoring of iron ions. In addition, SnO 2 with excellent conductivity can accelerate electron transfer on the surface of Fe 2 O 3 , further activation PMS. Approximately 89.3% of tetracycline (TC) was removed in Fe 2 O 3 /SnO 2 /PMS system, which was higher than alone Fe 2 O 3 /PMS (73.2%) and SnO 2 /PMS (39.7%) systems. The operating parameters were evaluated and studied. Electron paramagnetic resonance (EPR) and quenching tests manifested that 1 O 2 was primary active specie, and ⋅OH, ⋅SO 4 − and ⋅O 2 − were participated in the degradation process. Besides, degradation pathways were proposed by identifying the intermediate products. This work is expected to offer a potential design for construction eco-friendly heterogeneous catalyst toward wastewater treatment.
研究领域:
环境科学
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催化化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2018
·
IF 3.779
Wenwen Ge,Yuhong Chang,Vinothkumar Natarajan,Zhenyu Feng,Jinhua Zhan,Xicheng Ma
Novel In 2 O 3 -SnO 2 hybrid sensing nanostructures with porous nature were successfully prepared and characterized by various techniques such as X-ray diffraction (XRD), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), X-ray photoelectron spectroscopy (XPS) and high resolution transmission electron microscopy (HRTEM). Gas sensing properties of the fabricated sensor based on the as-prepared In 2 O 3 -SnO 2 hybrid nanostructures were systematically investigated and compared with those of pure SnO 2 . The hybrid nanostructures containing 3% In 2 O 3 exhibit the highest response value of 30.7–100 ppm formaldehyde at 100 °C, which was 14 times higher than that of pure SnO 2 . Moreover, gas sensors based on the as-prepared In 2 O 3 -SnO 2 hybrid nanostructures also exhibit high stability and good selectivity for formaldehyde. The enhanced sensing performances of formaldehyde were mainly attributed to the formation of n-n heterojunctions and the synergistic interaction between In 2 O 3 and SnO 2 .
研究领域:
材料科学
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纳米技术
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传感器学
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表面化学
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功能材料
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2014
·
IF 4.058
Yipeng Zang,Liping Li,Xiaoguo Li,Rui Lin,Guangshe Li
A series of novel composites g -C 3 N 4 /SnO 2 were first synthesized using a facile two-step process. Through systematic sample characterization, it is demonstrated that all composites consist of two components: g -C 3 N 4 with a low specific surface area and SnO 2 nanoparticles with a large specific surface area. Within the composites, component of SnO 2 nanoparticles dispersed well onto the component g -C 3 N 4 with a clear interface between each other. The interactions between both components are strong, as confirmed by variations in binding energies and lattice parameters. A synergistic collaboration is achieved for the composites, as contributed by surface adsorption of organics from π–π conjugation of component g -C 3 N 4 , improved separation efficiency of photo-generated carriers from interfacial interactions between both components, and increased surface area from component SnO 2 nanoparticles. As a consequence, these composites exhibit a significantly enhanced photocatalytic activity towards MO degradation under visible light irradiation. The optimum photocatalytic performance is achieved at 47.5 wt% SnO 2 , showing a reaction kinetic constant of 0.0078, which is much higher than those of components g -C 3 N 4 and SnO 2 . With the unique synergistic collaboration, the optimized composite with Pt additives is also successfully applied to high-efficiency production of hydrogen from water splitting under visible light irradiation.
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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DOI
高影响因子
CARBON
·
2023
·
IF 10.9
Zhangjie Qin,Zhaofeng Wu,Qihua Sun,Jun Sun,Min Zhang,Fengjuan Chen,Dongzhi Zhang,Changwu Lv,Haiming Duan
Inspired by the ordered tubular structure inside the dog nose and its olfactory receptors, this paper reports a biochar/SnO 2 composite based on waste disposable bamboo chopsticks (DBC) combined with tin dioxide (SnO 2 ) nanoparticles . The response of optimized biochar/SnO 2 composite reaches 4513 to 500 ppm NH 3 , and the response/recovery times are 50.4 s and 3.7 s, respectively. The biochar/SnO 2 composite displays the dog-nose-like ultra-fast response (1 s response up to 1100) to 500 ppm NH 3 at room temperature (25 °C), which makes the biochar/SnO 2 composite with the application promising for rapid detection of NH 3 . The optimized biochar/SnO 2 sensor also exhibits good selectivity and linear response with a theoretical detection limit as low as 34 ppb NH 3 . In addition, the biochar/SnO 2 sensor has reliable humidity immunity and long-term stability. Within a period of up to six months, the response fluctuation of biochar/SnO 2 sensor to 500 ppm NH 3 at 25 °C is less than 3.7%. However, the susceptibility of biochar/SnO 2 composite to the operating temperature need to be overcome. The biochar/SnO 2 composite was prepared by low-temperature pyrolytic carbonization (300 °C) with the advantages of abundant raw materials, low cost and green environmental protection, providing a new outlet for solid waste.
研究领域:
材料科学
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环境科学
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传感技术
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产品关联
DOI
高影响因子
MICROCHIMICA ACTA
·
2025
·Vol. 192
·期 9
·1-12
·
IF 5.3
Han Yiming,Hao Shuai,Liu Lihong,Li Bo,Mu Yannan,Yang Ming,Zhang Jie
The development of NH 3 sensors with efficient room temperature detection is crucial for Internet of Things-driven smart agriculture. Herein, PANI/SnO 2 hollow nanospheres composites were in situ synthesized on flexible interdigital electrodes (PET-IDE). Within the PANI/SnO 2 composites microstructure, the SnO 2 hollow spheres can provide effective support to the PANI film, minimize agglomeration, and enhance the functional performance of PANI. Furthermore, the extensive interface between the SnO 2 hollow spheres and the PANI film promotes the creation of p-n heterojunction, thereby significantly improving the NH 3 gas-sensing performance. The 4PS-based sensor (the PANI/SnO 2 composite obtained at 0.04 mol·L −1 APS/HCl solutions) exhibited a high response (9.63) toward 100 ppm NH 3 , along with excellent selectivity and stability. Correlations between microstructure and NH 3 gas-sensing behavior were systematically investigated, offering theoretical insights for sensor optimization. Graphical
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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柔性电子学
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环境监测
✓ 已验证
DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2024
·
IF 8
Lili Zhao,Jiawei Zhou,Peipei Li,Shu Huang,Xiaohua Zhu,Youyu Zhang,Meiling Liu,Shouzhuo Yao
Human immunoglobulin G (HIgG) plays a significant role in diagnosing infections and monitoring autoimmune diseases. However, the development of sensitive and reliable sensing platforms remains a challenge. Based on the Ag 2 S/SnO 2 composites, a dual-mode sensing platform was developed using multifunctional CoOOH nanoflakes for the sensitive detection of HIgG through photoelectrochemistry (PEC) and colorimetry. In the PEC mode, Ag 2 S QDs boost the PEC activity of SnO 2 NFs and facilitate the subsequent antibody immobilization. Ascorbic acid (AA) captures holes in Ag 2 S/SnO 2 to enhance the photocurrent. CoOOH, acting as a secondary antibody label, forms a sandwich structure with the electrode. The loading of HIgG and CoOOH-Ab2 due to specific recognition of antigen-antibody, leads to the quenching of PEC signal. Various amounts of HIgG will bind with different amounts of CoOOH-Ab2, displaying a linear response within the range of 100 pg/mL∼10 μg/mL, with the detection limit of 2.2 pg/mL. In the colorimetric mode, CoOOH efficiently catalyzes the oxidation of 3,3′,5,5′-tetramethylbenzidine (TMB), and various amount of the sandwich biocomplexes formed with different HIgG levels lead to distinct color changes for visual detection. The linear response range is 500 pg/mL∼9.375 μg/mL with a lower detection limit of 0.29 ng/mL. The two independent modes with different mechanisms, based on the same PEC electrode, can validate each other and provide more scientific and reliable results in response to the targets. Thus, this dual-mode sensing platform for targets-induced signaling changes presents a novel strategy for bioanalysis and detection.
研究领域:
生物化学
·
分析化学
·
纳米技术
·
免疫学
✓ 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）