BIOSENSORS & BIOELECTRONICS
·
2018
·
IF 8.173
Yaoguang Wang,Dawei Fan,Guanhui Zhao,Jinhui Feng,Dong Wei,Nuo Zhang,Wei Cao,Bin Du,Qin Wei
An ultrasensitive label-free photoelectrochemical (PEC) immunosensor with high visible-light activity was developed for quantitative detection of amyloid β-protein (Aβ) by cross-linking anti-Aβ antibody onto the Ag 2 S sensitized SnO 2 /SnS 2 nanocomposites . Specifically, SnO 2 with flower-like porous nanostructure was innovatively applied in PEC immunosensor as a basal material. It could form a heterostructure with SnS 2 , which brought about the sensitization of SnO 2 and enhanced the separation of photogenerated electrons and holes. Moreover, Ag 2 S was in-situ growth on the surface of SnO 2 /SnS 2 , which further enhanced the photocurrent response significantly. Therefore, SnO 2 /SnS 2 /Ag 2 S could form stepwise band-edge structure, which benefited the light harvesting and provided a good foundation for sensor construction and detection. Under optimal conditions, the PEC immunosensor was used to detect the content of Aβ and exhibited a wide linear concentration range from 0.5 pg mL −1 to 100 ng mL −1 , with low limit of detection (0.17 pg mL −1 ) and limit of quantification (0.56 pg mL −1 ). Additionally, the designed PEC immunosensor exhibited good reproducibility, specificity, and stability which may find potential applications in the biosensor, biomedicine , clinical diagnosis, photocatalysis and other related fields.
研究领域:
生物传感器
·
生物医学
·
临床诊断
·
光催化
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2017
·
IF 7.504
Haoru Shan,Xueqin Wang,Feihao Shi,Jianhua Yan,Jianyong Yu,Bin Ding
The separation and purification of chemical molecules from organic media under harsh chemical environments are of vital importance in the fields of water treatment, biomedical engineering, and organic recycling. Herein, we report the preparation of a flexible SiO2/SnO2 nanofibrous membrane (SiO2/SnO2 NFM) with high surface area and hierarchical porous structure by selecting poly(vinyl butyral) as pore-forming agent and embedding crystalline phase into amorphous matrix without using surfactant as sacrificial template. Benefiting from the uniform micropore size on the fibers and negatively charged properties, the membranes exhibit a precise selectivity toward molecules based on electrostatic interaction and size exclusion, which could separate organic molecule mixtures with the same electrostatic charges and different molecular sizes with a high efficiency of more than 97%. Furthermore, the highly tortuous open-porous structures and high porosity give rise to a high permeate flux of 288 000 L m–2 h–1. In addition, the membrane also displays excellent stability and can be reused for ten consecutive filtration–regeneration cycles. The integration of high filtration efficiency, large permeate flux, good reutilization, and easy to industrialization provides the SiO2/SnO2 NFM for potential applications in practical molecular purification and separation science.
研究领域:
水处理
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生物医学工程
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有机回收
·
材料科学
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环境科学
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化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2017
·Vol. 52
·期 19
·11554-11568
·
IF 2.599
Hu Jie,Wang Ying,Wang Wenda,Xue Yan,Li Pengwei,Lian Kun,Chen Lin,Zhang Wendong,Zhuiykov Serge
Acetone detection at the parts-per-billion (ppb) level is achieved in this work using selective and optimized Fe doping of the three-dimensional (3D) flower-like SnO 2 hierarchical microstructures. These structures were successfully synthesized via a one-step hydrothermal route. Detailed information about the crystal structure, surface morphology and composition of the Fe-doped SnO 2 microstructures was investigated using X-ray diffraction (XRD), energy-dispersive spectroscopy (EDS), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy (XPS) techniques. Gas sensing experiments were conducted on the as-prepared Fe-doped SnO 2 sensors. The measured results show that the incorporation of Fe into the SnO 2 structure can greatly enhance the gas sensing properties of SnO 2 sensors under the optimum working temperature (200 °C). Specifically, the 1.0 mol% Fe-doped SnO 2 microstructures exhibit the highest response, fast response/recovery time, lowest detection limit and good selectivity and long-term stability. The results demonstrate that the developed Fe-doped SnO 2 gas sensor has great potential for ppb -level acetone detection in many practical applications.
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
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2015
·Vol. 5
·期 103
·84856-84864
·
IF 3.84
Qianchi Ma,Lei Liu,Wei Cui,Ruifeng Li,Tingting Song,Zhaojie Cui
Model aqueous solutions of perfluorooctanoic acid (PFOA, 100 mg L−1) were electro-oxidized in a homemade container. The electrocatalytic behavior and anodic performance of Ti/SnO2–Sb/Yb–PbO2, Ti/SnO2–Sb–PbO2 and Ti/SnO2–Sb–Yb anodes in sodium electrolytes were compared. The SnO2–Sb/Yb–PbO2 anode demonstrated better electrocatalytic performance compared with the SnO2–Sb–PbO2 and SnO2–Sb–Yb electrodes in terms of both degradation and defluorination. Then a systematic experimental study was designed as follows to analyze the influencing factors: initial concentration of PFOA (10 mg L−1 to 200 mg L−1), current density (1 mA cm−2 to 40 mA cm−2), initial pH value (3 to 11) and electrode distance (5 mm to 20 mm). After a 150 min electrolysis, the optimum reaction conditions were obtained and the degradation and defluorination ratios reached 95.11 ± 3.9% and 75.7 ± 2.8%, respectively. Under the optimum conditions, the degradation of PFOA followed pseudo-first-order kinetics (0.0193 min−1) and the degradation half-life was 35.9 min. The produced F− was measured using a fluoride ion selective electrode, whereas the intermediate PFCAs with short-chain lengths were measured using HPLC-MS. A detailed degradation pathway was proposed in this study by analyzing the intermediates and the recovery of fluoride.
研究领域:
环境科学
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化学工程
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ELECTRONIC MATERIALS
·
2022
·Vol. 51
·期 12
·6637-6644
·
IF 2.047
Liu Ying,Chen Ling,Jiang Hao,Li Chunzhong
The use of tin oxide (SnO 2 ) with high theoretical capacity in practical application as the anode material of lithium-ion batteries (LIBs) has been limited due to its large volume expansion and fast capacity decay. To address this problem, we proposed the synthesis of encapsulating SnO 2 nanoparticles in the channels of nitrogen-doped carbon nanotubes (SnO 2 -in-NCNTs) by capillary force. The confined spaces of NCNTs not only restrict the particle size of SnO 2 , but also effectively buffer the volume change during lithiation/delithiation processes. In addition, the conductive NCNTs also ensure the effective contact of the electrolyte to the electrode surface, facilitating both ion and electron transfer. When applied to LIBs, the SnO 2 -in-NCNTs possess high reversible capacities of 961.8 mAh g −1 at 0.1 A g −1 and 326.3 mAh g −1 at 10 A g −1 . Moreover, they exhibited superior cyclic stability with a capacity retention of 96% at 5 A g −1 after 500 cycles. This work provides a simple and effective strategy for performance improvement of SnO 2 -based anode materials.
研究领域:
材料科学
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电化学
·
纳米技术
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
CHEMISTRY-A EUROPEAN JOURNAL
·
2020
·Vol. 26
·期 56
·12882-12890
·
IF 4.857
Qiongguang Li,Yanhong Wang,Qiangqiang Tan,Ziyi Zhong,Fabing Su
Graphical Hollow core–shell anode : An SnO 2 @C@Co-NC anode material with hollow core–shell structure was structurally designed and synthesized by a heteroatom-doping and multiconfinement approach. This material can efficiently alleviate the volume expansion of the SnO 2 -based anode materials and exhibits much-enhanced electrochemical performance, including high rate performance and cycle stability, as well as superior capacity. To overcome the drawbacks of the structural instability and poor conductivity of SnO 2 -based anode materials, a hollow core–shell-structured SnO 2 @C@Co-NC (NC=N-doped carbon) composite was designed and synthesized by employing the heteroatom-doping and multiconfinement strategies. This composite material showed a much-reduced resistance to charge transfer and excellent cycling performance compared to the bare SnO 2 nanoparticles and SnO 2 @C composites. The doped heteroatoms and heterostructure boost the charge transfer, and the porous structure shortens the Li-ion diffusion pathway. Also, the volume expansion of SnO 2 NPs is accommodated by the hollow space and restricted by the multishell heteroatom-doped carbon framework. As a result, this structured anode material delivered a high initial capacity of 1559.1 mA h g −1 at 50 mA g −1 and an initial charge capacity of 627.2 mA h g −1 at 500 mA g −1 . Moreover, the discharge capacity could be maintained at 410.8 mA h g −1 after 500 cycles with an attenuation rate of only 0.069 % per cycle. This multiconfined SnO 2 @C@Co-NC structure with superior energy density and durable lifespan is highly promising for the next-generation lithium-ion batteries.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
产品关联
DOI
PubMed
高影响因子
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
Analytical Methods
·
2021
·Vol. 13
·期 7
·925-932
·
IF 2.896
Yun Sun,Xiaoying Yin,Lin Zhang,Menghui Cao
Novel photo-responsive hollow structured molecularly imprinted polymers (PHMIPs) were developed as a selective sorbent to recognize and separate analytes in complex samples. The PHMIPs were prepared using kaempferol (KAE) as the template, 4-[(4-methacryloyloxy) phenylazo] benzenesulfonic acid as a photo-responsive functional monomer, and hollow SnO2 (Ho-SnO2) as the support via free radical polymerization. The structure and physical properties of the developed polymers were characterized using different nano structural techniques and spectroscopy. Under alternating irradiation at 365 and 440 nm, the PHMIPs could release and uptake KAE, indicating that the template molecules can be easily bound to recognition sites and released back into solution. From adsorption experiments, the binding properties were evaluated, and the maximal adsorption capacity of the PHMIPs was 11.04 mg g−1. Furthermore, the developed PHMIPs showed high selectivity towards KAE compared to other compounds. Subsequently, the materials were successfully applied to the photo-controlled extraction of KAE from sea buckthorn leaves. The recoveries for KAE were higher than 90% and relative standard deviation values were between 1.81% and 2.53%, indicating the potential of the developed materials for use in extracting KAE from complex samples.
研究领域:
材料科学
·
分析化学
·
药学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2024
·
IF 2.7
Jiaxin Gao,Mengxin Liu,Xinan Shi,Daocheng Pan
A high-quality electron transport layer (ETL) has an extremely profound impact on the performance of quantum dot light-emitting diodes (QD-LEDs). To date, ZnO nanoparticle thin films have been usually adopted as ETLs in high-performance QD-LEDs. However, because ZnO is an amphoteric oxide, ZnO nanoparticles are chemically unstable in air, and the quantum-sized SnO2 nanoparticles have great potential to resolve the stability issue of the ZnO nanoparticle ETL. In this work, we develop a ligand-assisted solvothermal precipitation method to prepare quantum-sized SnO2 nanoparticles. Short-chain butyric acid and butylamine are used as the binary ligands, and ethanol is used as the solvent. Under solvothermal conditions, hydrophobic SnO2 nanoparticles capped by butyric acid and butylamine will aggregate and form a white precipitate in ethanol. The SnO2 nanoparticles with a particle size of 3.6 nm exhibit an optical band gap of 4.23 eV. Based on the quantum size effect, the conduction band minimum position of the quantum-sized SnO2 nanoparticles is upshifted to −3.72 eV, which makes them suitable for use in QD-LEDs as the ETL, so that the electrons can be readily injected into the quantum dot emitting layer. As a result, QD-LEDs based on the quantum-sized SnO2 nanoparticles exhibit a maximum external quantum efficiency of 12.9%, revealing that the quantum-sized SnO2 nanoparticles have great potential for application in QD-LEDs as the ETL.
研究领域:
材料科学
·
纳米技术
·
光电子学
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2020
·
IF 3.99
Yefeng Feng,Kaidan Wu,Huafeng Dong,Deping Xiong,Miao He
The composite of TiN/SnO 2 @C nanosheets has been synthesized via ball milling . In the sheet-like structure, the TiN/SnO 2 nanoparticles were evenly anchored in the graphite nanosheets . The TiN nanoparticles can not only increase the electron conductivity, but also stabilize the structure in Li + insertion/extraction. Besides, the sheet-like graphite can accommodate the volumetric expansion during cycling. Consequently, high specific capacity (837.0 mAhg −1 after 100 cycles at 0.2 Ag −1 ), remarkable rate property (466.8 mAhg −1 at 5.0 Ag −1 ) and long-life cycling performance for the TiN/SnO 2 @C nanosheets can be achieved in electrochemical performance measurement. The composite of TiN/SnO 2 @C nanosheets will become promising anode material for lithium ion batteries in the next generation.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry B
·
2018
·Vol. 6
·期 46
·7634-7642
·
IF 4.776
Dawei Fan,Chunzhu Bao,Xin Liu,Dan Wu,Yong Zhang,Huan Wang,Bin Du,Qin Wei
A unique hierarchical mesoporous SnO2 microflower was utilized for the fabrication of an immunosensor. The modified nitrogen-doped carbon quantum dots (NCQDs) improved the photoelectrochemical (PEC) activity of the SnO2, and contributed to the in situ assembly of Bi2S3 nanoparticles on the surface of the SnO2 materials. Under the stimulation of visible light and ascorbic acid as an efficient electron donor, the NCQDs and Bi2S3 co-sensitized mesoporous SnO2 microflower (SnO2/NCQDs/Bi2S3) modified ITO electrode exhibited an excellent photoelectric signal arriving at around 150 μA. Moreover, a novel label-free PEC sensor based SnO2/NCQDs/Bi2S3 composite was constructed, which enabled the ultrasensitive detection of N-terminal pro-B-type natriuretic peptide (NT-proBNP). The photocurrents decreased linearly with the logarithm of NT-proBNP concentration in the range of 0.01–50 ng mL−1 with a detection limit of 3.7 pg mL−1 (S/N = 3). Furthermore, the novel PEC immunosensor showed perfect selectivity, good stability and reproducibility, which suggest promising applications in the sensing and clinical diagnosis of cardiac disease.
研究领域:
分析化学
·
生物传感器
·
心脏病学
·
光电化学
✓ 已验证
DOI
高影响因子
ENERGY & FUELS
·
2024
·
IF 5.2
Yu Chen,Tianjiao Li,Huanqiao Song,Mingsheng Luo,Shixin Zhang
To improve the electrocatalytic activity of catalysts for ethanol oxidation, PtxAuy/SnO2GN with a double-junction structure of PtxAuy and SnO2 is designed and synthesized, in which the atom ratios of Pt and Au are 1:0, 1:1, 1:2, 1:3, 1:4, and 1:5. Raman spectroscopy, Brunauer–Emmet–Teller method, X-ray diffraction, transmission electron micrography, and X-ray photoelectron spectroscopy are used to characterize the prepared catalysts. It is found that Pt and Au form an alloy, and the alloy is uniformly distributed around SnO2 on graphene (GN). The catalytic properties of PtxAuy/SnO2GN for ethanol electrooxidation are studied by electrochemical tests such as cyclic voltammetry, linear sweep voltammetry, chronoamperometry, and CO stripping. The results show that Pt1Au3/SnO2GN has the largest electrochemically activated surface area (ECSA), the lowest ethanol oxidation onset potential, the highest ethanol oxidation peak current density, and the best ethanol oxidation stability. Combined with electrochemical in situ infrared spectroscopy, the excellent catalytic performance of Pt1Au3/SnO2GN is attributed to its unique double-junction structure of PtAu alloy and SnO2 on GN enhancing the tolerance to CO-like toxic species, as well as the alloy of Pt and Au and their appropriate atomic ratio properly changing the electronic structure of Pt and increasing the ECSA, which are conducive to the easier electrooxidation of ethanol.
研究领域:
电化学
·
材料科学
·
催化
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）