Chemosensors
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2023
·Vol. 11
·期 1
·31
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IF 4.2
Xilai Lu,Menghan Wu,Yong Huang,Jiannan Song,Yong Liu,Zhiqiao Yan,Feng Chen,Jieting Zhao,Wanping Chen
The slight but cumulative influence of impurity gases in air poses a great threat to the long-term stability of room-temperature gas sensors. Room-temperature hydrogen-sensitive Pt–SnO2composite nanoceramics of 5 wt% Pt were prepared through pressing and sintering. The response of a sample was over 10,000 after being exposed to 500 ppm H2S–20% O2–N2at room temperature, and the room-temperature hydrogen sensing capacity was seriously degraded even for samples that had aged dozens of days since H2S exposure. Mild heat treatments such as 160 °C for 10 min were found able to fully activate those H2S-exposed samples. As the peak of S 2p electron was clearly detected in H2S-exposed samples, it was proposed that for room-temperature hydrogen-sensitive Pt–SnO2composite nanoceramics, H2S exposure induced degradation results from the poisoning of Pt by H2S deposited on it, which can be removed through a mild heat treatment. Periodic mild heat treatment should be a convenient and effective measure for room-temperature metal oxide gas sensors to achieve long-term stability through preventing the accumulation of impurity gases in air deposited on them.
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
Catalysts
·
2024
·Vol. 14
·期 10
·735
·
IF 3.8
Lu Qiu,Hanliang Li,Wenyi Xu,Rongshu Zhu,Feng Ouyang
The organic pollutants discharged from industrial wastewater have caused serious harm to human health. The efficient photocatalytic degradation of organic pollutants under sunlight shows promise for industrial applications and energy utilization. In this study, a modified TiO2photocatalyst doped with bismuth (Bi) and fluorine (F) and composited with SnO2and SiO2was prepared, and its performance for the degradation of Rhodamine B (RhB) under simulated sunlight was evaluated. Through the optimization of the doping levels of Bi and F, as well as the ratio of SnO2and SiO2to TiO2, the optimal catalyst reached degradation efficiency of 100% for RhB within 20 min under simulated sunlight, with a first-order reaction rate constant of 0.291 min−1. This value was 15, 41, 6.5, and 3.3 times higher than those of TiO2/SnO2, Bi/TiO2, Bi-TiO2/SnO2, and F/Bi-TiO2/SnO2, respectively. The active species detection showed that h+was the most crucial active species in the process. The role of Bi and F addition and SnO2-SiO2compositing was investigated by characterization. Bi formed a chemical bonding with TiO2by doping into TiO2. The absorbance intensity in the UV and visible light regions was improved by SnO2and F modification. Composite with SiO2led to a larger surface area that allowed for more RhB adsorption sites. These beneficial modifications greatly enhanced the photocatalytic activity of the catalyst.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
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
·
纳米技术
·
传感器学
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表面化学
·
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
·
能源科学
✓ 已验证
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
·
环境科学
·
传感技术
✓ 已验证
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
Journal of Energy Storage
·
2024
·
IF 8.9
Tian Qin,Zihao Wang,Xiaojun Ding,Shuqi Fu,Na Zhan,Wentao Lu,Zijian Li,Zihao Huang,Mingyang Li,Jiansheng Liu,Fei Gao,Weiping Zhou,Zhenzhi Cheng,Guangsheng Luo
Li 7 P 3 S 11 -based all-solid-state lithium metal batteries (ASSLMBs) have received a lot of attention because of their potential for high energy density . However, the poor interfacial stability between Li 7 P 3 S 11 electrolyte and lithium metal anode hinders its application in ASSLMBs. Here, the Li-SnO 2 composite anode (LSO) was designed by treating the lithium metal with SnO 2 to produce an interface composed of Li 22 Sn 5 and Li 2 O phases. The rapid lithium ion diffusion coefficient of Li 22 Sn 5 alloy accelerates the migration of lithium ions at the interface, while the favorable lithiophilicity of Li 2 O induces the uniform deposition of lithium ions, which hinders the growth of lithium dendrites . Therefore, the symmetrical battery using an LSO anode showed a high critical current density (CCD) of 2.5 mA cm −2 at room temperature and a stable cycle of 350 h at room temperature at 0.2 mA cm −2 (0.2 mAh cm −2 ). In addition, the improved all-solid-state lithium battery also showed an ultra-stable cycle, and the NCM622/LPS/10LSO battery still maintained 78.6 % of its original capacity after 250 cycles at 0.5C. The surface treatment method of the LSO composite anode enables it to produce ASSLMB with excellent electrochemical performance .
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
DOI
高影响因子
ACS Applied Energy Materials
·
2019
·
IF 0
Ting Qu,Qiang Tan,Yingjie Chen,Liting Liu,Shengwu Guo,Yuanzhen Chen,Yan Liu,Sai Li,Yongning Liu
Direct alcohol fuel cell technology (DAFC) has gained significant interest recently as it is a green energy technology with a low/zero pollution emission. Nevertheless, the sluggish kinetics of the electrocatalysis process and the high cost of anode catalysts still impede the wide application of DAFC. Moreover, the limited understanding of the reaction mechanism restrains the development of anode catalysts. Here, we have prepared a Pd-(SnO2@C)/C catalyst and highlighted a strategy to demonstrate the effects of active oxygen-contained species and electronic interaction, which are identified to have a synergistic effect. The as-prepared Pd-(SnO2@C)/C catalyst showed remarkable activity and stability for EOR and MOR in alkaline media. It also had an encouraging performance in a polymer fiber membrane-based alkaline DAFC, where a NiCo2O4 catalyst was used for the oxygen cathode. Combined with the theoretical analysis and the experimental research results, this study reveals that the electronic interaction is the dominant mechanism in the synergistic effect, which provides theoretical guidance and technical support for the preparation of the next generation of high catalytic activity and high stability anode catalysts of DAFC.
研究领域:
电化学
·
催化
·
能源材料
·
燃料电池
✓ 已验证
产品关联
DOI
SENSORS AND ACTUATORS B-CHEMICAL
·
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）