APPLIED SURFACE SCIENCE
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2016
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IF 3.15
Yaocheng Deng,Lin Tang,Guangming Zeng,Haoran Dong,Ming Yan,Jingjing Wang,Wei Hu,Jiajia Wang,Yaoyu Zhou,Jing Tang
Polyaniline (PANI) modified mesoporous single crystal TiO 2 microsphere (PANI/MS-TiO 2 ) with excellent photocatalytic activity was successfully prepared by a simple method of solution evaporation and chemisorption. The X-ray diffraction characterization demonstrated that the whole MS-TiO 2 kept the crystal type of anatase. The nitrogen adsorption-desorption characterization coupled with scanning electron microscopy indicated that the MS-TiO 2 possessed a unique mesoporous structure with high specific surface area, which resulted in the increased load of PANI on the surface of MS-TiO 2 and multiple light reflection in the photocatalyst. The UV–vis diffuse reflectance spectra confirmed that PANI/MS-TiO 2 presented more absorption ability in the visible light range than that of the pristine MS-TiO 2 . The transient photocurrent responses and electrochemical impedance spectroscopy (EIS) indicated the high photo responses and fast photogenerated charge separation efficiency of PANI/MS-TiO 2 . The photocatalytic activity of the PANI/MS-TiO 2 was evaluated by the photodegradation of RhB and MB under visible light irradiation. MS-TiO 2 photocatalyst with different molar ration of PANI had been prepared, and the results showed that the optimal photocatalyst (PANI/MS-TiO 2 (1:40)) exhibited the highest photocatalytic efficiency which is nearly three times as great as that of pristine MS-TiO 2 for the degradation of the RhB and MB under visible light irradiation. The remarkable performance of the PANI/MS-TiO 2 under visible light was attributed to its mesoporous single crystal structure with large surface, conductivity, as well as the synergistic effect between PANI and MS-TiO 2 .
研究领域:
材料科学
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环境科学
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DOI
高影响因子
APPLIED SURFACE SCIENCE
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2016
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IF 3.15
Chen Chen,Xue-yan Zhu,Qiao-ling Gao,Fei Fang,Xiao-jun Huang
A new synthetic route leading to functional polyphosphazene cyclomatrix microsphere has been developed via thiol-ene click modification. Hexacholorocyclophosphazene (HCCP) was crosslinked with both bisphenol-S and 4,4′-diallyl bisphenol-S to obtain vinyl polyphosphazene microspheres (VPZM) in order to ensure high crosslinking degree and introduce vinyl moieties. Compared to the microspheres obtained by HCCP and bisphenol-S, the size of VPZM was broadly dispersed from 400 nm to 1.40 μm. Thiol-ene click reactions were carried out to attach functional groups, such as glucosyl, carboxyl, ester and dodecyl groups onto polyphosphazene microspheres, which demonstrated no change in morphology and size after modification. Solid state NMR (SSNMR) and Fourier transform infrared spectoscopy (FT-IR) results showed that the vinyl moieties were introduced in the period of crosslinking and functionalization was also successful via click reactions. Moreover, the microspheres presented a little difference in thermal properties after modification. Concanavalin A (Con-A) fluorescent adsorption was also observed for glucosyl microspheres. Thus, the thiol-ene modified polyphosphazene microspheres displayed chemical flexibility in post-functionalization. These microspheres can be potentially applicated in enzyme immobilization, protein adsorption and chromatographic separation.
研究领域:
材料科学
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生物化学
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产品关联
DOI
高影响因子
LANGMUIR
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2013
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IF 4.187
Ai Du,Bin Zhou,Weiwei Xu,Qiujie Yu,Yang Shen,Zhihua Zhang,Jun Shen,Guangming Wu
Rigid and stable networks composed of litchi-shaped microspheres were formed via hierarchical self-assembly (SA) of oxide-based nanoparticles (NPs). The phenomenon of the apparent changes from NPs networks to microspheres networks after the gelation was similar to normal microsyneresis. However, in-situ composition evolution results indicate that the SA is driven by interparticle dehydration, but not affinity difference between the network for itself and for the solvent. In-situ small-angle X-ray scattering (SAXS), UV–vis–NIR, and electric conductivity were used to study the microsyneresis process. To further demonstrate the mechanism, extra complexant was added and successfully restrained the NPs–microsphere transition by inactivating the surface hydroxyl of the NPs. Considering the structural similarity, this work may provide a new approach to control the assemblies of diverse oxide-based NPs.
研究领域:
材料科学
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纳米技术
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
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2021
·
IF 4.464
Xiaoyan Chen,Na Cheng,Yuan-Li Ding,Zhigang Liu
Transition metal sulfides have attracted attentions because of their high theoretical capacity for potassium-ion batteries (PIBs). However, there are still many challenges in maintaining long-cycle stability and improving specific capacity owing to the low conductivity of active materials and their large volume changes. Herein, NiS 2 /carbon nanotubes (CNTs) hybrids with a reinforced concrete structure are prepared. In this hybrid, one part of CNTs is covered in the interior of the NiS 2 microspheres, while the other part is distributed on the surface of the microspheres. Among them, CNTs with a flexible skeleton embedded in NiS 2 microspheres act as rebar, and NiS 2 with high theoretical capacity acts as concrete. This design effectively buffers the structural strain of NiS 2 and ensures the close interconnection between each nano-building blocks, which not only improves the structural stability, but also facilitates the full utilization of active materials. Meanwhile, the CNTs distributed on the surface of the NiS 2 microspheres are interconnected into a network structure, which provides a highly conductive carbon support for the active material, accelerates the electron transfer on the interface and promotes the effective mass transfer of potassium ions. As anode for PIBs, NiS 2 /CNTs hybrids show attractive rate performance (469.4 mAh g −1 at 50 mA g −1 and 250.8 mAh g −1 at 2000 mA g −1 ) and superior cycling stability with capacity retention of 81.2% (reversible capacity of 353.3 mAh g −1 at 100 mA g −1 after 200 cycles), 7 times higher than that of pristine NiS 2 . The design method of NiS 2 /CNTs hybrids can offer an efficient strategy for resolving the large volume fluctuation of metal sulfides in energy storage applications.
研究领域:
材料科学
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能源存储
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产品关联
DOI
高影响因子
Polymers
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2021
·Vol. 13
·期 15
·2453
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IF 4.329
Ri-si Wang,Ya Li,Xi-xiang Shuai,Rui-hong Liang,Jun Chen,Cheng-mei Liu
The development of effective heavy metal adsorbents has always been the goal of environmentalists. Pectin/activated carbon microspheres (P/ACs) were prepared through simple gelation without chemical crosslinking and utilized for adsorption of Pb2+. Scanning electron microscopy (SEM) revealed that the addition of activated carbon increased the porosity of the microsphere. Texture profile analysis showed good mechanical strength of P/ACs compared with original pectin microspheres. Kinetic studies found that the adsorption process followed a pseudo-second-order model, and the adsorption rate was controlled by film diffusion. Adsorption isotherms were described well by a Langmuir isotherm model, and the maximum adsorption capacity was estimated to be 279.33 mg/g. The P/ACs with the highest activated carbon (P/AC2:3) maintained a removal rate over 95.5% after 10 adsorption/desorption cycles. SEM-energy-dispersive X-ray spectrum and XPS analysis suggested a potential mechanism of adsorption are ion exchange between Pb2+and Ca2+, electronic adsorption, formation of complexes, and physical adsorption of P/ACs. All the above results indicated the P/ACs may be a good candidate for the adsorption of Pb2+.Keywords:pectin;activated carbon;microsphere;Pb2+;adsorption
研究领域:
环境科学
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材料科学
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产品关联
DOI
PubMed
高影响因子
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
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2021
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IF 3.927
Xueling Yuan,Lixia Sun,Junqi Wang,Dankui Liao,Jianhua Sun
Pyrolyze metal-organic frameworks (MOFs) is a promising method to prepare metal oxides with large specific surface and multiple active sites. The obtained metal oxides can be utilized as gas sensors. Noble metal doping is an effective way to improve the gas sensitivity of materials. In this work, SnO 2 are prepared by pyrolyzation of metal organic frameworks and Ag-doped SnO 2 composites are fabricated by AgNO 3 reduction in a water bath at 4 °C. The gas-sensing experiment reveals that the optimum operating temperature of different mass fraction of Ag doped SnO 2 samples is 250 °C which is lower than pure SnO 2 (300 °C). The response of composites (7 wt% Ag–SnO 2 ) is 157 to 10 ppm ethanol, which is about 10 times higher than pure SnO 2 (14). The composites have good selectivity and stability. Such excellent performance is contributed to the increase of the gas adsorption capacity , catalytic active site and oxygen vacancy of the composites caused by the doping of Ag.
研究领域:
材料科学
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化学
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DOI
高影响因子
Biosensors-Basel
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2022
·Vol. 12
·期 11
·977
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IF 5.743
Birui Jin,Zhiguo Du,Chuyao Zhang,Zhao Yu,Xuemin Wang,Jie Hu,Zedong Li
Inflammationcaused by viral or bacterial infection is a major threat to human health globally. Blood C-reactive protein (CRP) has been proven to be a sensitive indicator for the occurrence and development of inflammation. Furthermore, a tiny change of blood CRP concentration may portend chronic diseases; therefore, high-sensitivity CRP (hs-CRP) detection in a quantitative, rapid, user-friendly, and low-cost manner is highly demanded. In this paper, we developed a europium-chelate polystyrene microsphere (EuPSM)-based lateral flow immunoassay (LFIA) integrating with a benchtop fluorescence analyzer for hs-CRP detection. The optimization of the EuPSM-based LFIA was implemented through adjusting the antibody density on EuPSM from 100% to 60% of the saturated density. Finally, the limit of detection of 0.76 pg/mL and detection range of 0.025–250 ng/mL were obtained. Moreover, the clinical application capability of the proposed platform was validated through detecting CRP in clinical serum samples, showing high consistency with the results obtained from the clinical standard method. Hence, the proposed EuPSM-based LFIA has been verified to be well suitable for hs-CRP detection, while also showing great applicability for sensitively and rapidly detecting other biomarkers.Keywords:fluorescence analysis;sensitivity enhancement;paper microfluidics;hs-CRP detection
研究领域:
医学诊断
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生物技术
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分析化学
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产品关联
DOI
PubMed
高影响因子
ANALYTICAL CHEMISTRY
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2022
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IF 8.008
Shijie Dai,Wei Li,Ruimin Xu,Xin Wang,Qianjin Li,Menghua Dou,Jianlin Li
We have demonstrated the proof-of-concept of a label-free fluorescence quantitative detection platform based on gold nanoparticle (AuNP) enhancement intrinsic fluorescence of protein on the silica photonic crystal microsphere (SPCM) array. The label-free one-step competitive fluorescence immunoassay protocol has been proposed on the surface of the SPCM. Aflatoxin B1 (AFB1) as a model molecule was detected by the newly established method. AFB1-bovine serum albumin and monoclonal antibodies (Abs) of anti-AFB1 have been immobilized on the surfaces of SPCMs and AuNPs, respectively. AuNPs remarkably enhanced the intrinsic fluorescence of artificial antigens on the surface of the SPCM at near UV excitation. The simulation of electric field distribution showed that the maximum value of the near-field enhancement |E/E0| of the SPCM with AuNPs could reach 20. The label-free fluorescence enhancement effect comes from the synergistic effects of photonic crystal effect and AuNP plasmon effect. Such a label-free fluorescence detection method can provide a linear detection range from 0.1 to 10 ng/mL with a limit of detection of 0.025 ng/mL and good specificity for AFB1. The recovery rates in the spiked cereal samples were measured in the range of 84.07 ± 5.71%–101.02 ± 5.13%, which were consistent with that of the traditional enzyme linked immunosorbent assay method. The label-free detection platform displays great application potential in biology, medicine, agriculture, food industry, chemical industry, energy source, and environmental protection.
研究领域:
生物技术
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分析化学
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食品安全
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环境科学
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材料科学
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产品关联
DOI
PubMed
高影响因子
FOOD CHEMISTRY
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2023
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IF 8.8
Xianlu Lei,Xinxin Xu,Li Wang,Liqiang Liu,Hua Kuang,Liguang Xu,Chuanlai Xu
In this study, a sensitive monoclonal antibody (mAb) 1B5 against eugenols was prepared based on a novel hapten. Based on this mAb, a paper-based lateral-flow immunoassay (LFIA) was developed using Eu-fluorescent microspheres sensor, that could achieve qualitative and quantitative detection of eugenols within 10 min. Results showed colorimetric values observed by the naked eye were 12.3 µg/kg, 12.3 µg/kg, 37 µg/kg and 111 µg/kg for eugenol, isoeugenol, methyl eugenol, and methyl isoeugenol, respectively, in both water and fish samples. For quantitative detection of eugenol, isoeugenol, methyl eugenol and methyl isoeugenol, the detection ranges were 4.49–48.4 µg/kg, 6.02–66.8 µg/kg, 16.5–150 µg/kg and 47.9–710 µg/kg in water, and 3.9–30.9 µg/kg, 5.9–62.6 µg/kg, 16.7–255 µg/kg, and 44.5–890 µg/kg in fish, respectively. The recovery test and detection in fish demonstrated the reliability of the LFIA in real samples. Therefore, the developed LFIA produced a promising alternative tool for the rapid on-site detection of eugenols.
研究领域:
分析化学
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免疫学
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环境科学
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食品科学
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产品关联
DOI
PubMed
高影响因子
OPTICS AND LASER TECHNOLOGY
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2025
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IF 5
Jun Dong,Yixuan Hou,Wei Gao,Chengyun Zhang,Lipeng Zhu,Yongkai Wang,Qingyan Han,Jianxia Qi
Surface-Enhanced Raman Scattering (SERS), with the exceptional single-molecule detection capability and high sensitivity, has become an advanced spectroscopic analysis method in fields such as chemical analysis and biosensing. Three-dimensional (3D) sandwich substrates, due to their unique structural characteristics, have attracted considerable attention for their ability to enhance SERS detection sensitivity. However, the controlled assembly of 3D sandwich substrates with bimetallic nanoparticles remains a challenge. In this paper, a fabrication method for constructing 3D sandwich substrates via a bottom-up approach is proposed. Using a liquid–liquid phase self-assembly method, Au@Ag nanocubes (Au@Ag NCs) were assembled on a polystyrene (PS) microsphere array with monolayer MXene (Ti 3 C 2 T X ) adsorption, successfully constructed an Au@Ag NCs/MXene/PS microsphere substrate. Furthermore, the SERS sensitivity of the substrate was evaluated using Rhodamine 6G (R6G), Crystal Violet (CV), and Aspartame (APM) molecules, and experimental results show that the detection limits are 10 −12 M, 10 −11 M, and 0.0313 g/L (1.06 × 10 −4 M), respectively, with excellent uniformity and stability of the substrate. These findings demonstrate that the constructed 3D substrate exhibits outstanding SERS performance and holds significant potential for applications in environmental pollutant detection and food safety.
研究领域:
分析化学
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纳米生物技术
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环境监测
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食品安全
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光谱学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
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2025
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IF 7.3
Wenjing Xie,Jiajiu Liang,Guangtao Chang,Ruoxin Li
Driven by increasing global energy consumption, smart textiles for personal thermal management, offering energy saving and dynamic temperature regulation, have garnered significant attention. This study introduces an all-weather personal thermal management textile engineered with three-dimensional structured MXene nanosheets, achieving bidirectional temperature control through passive thermal insulation and active photothermal conversion. Fabricated by electrostatically adsorbing MXene nanosheets onto hollow, thermally expandable microspheres (TEMs) and incorporating these MXene/TEMs composites as fillers in polyurethane coatings on cotton fabrics, the resulting textile exhibited exceptional thermal management capabilities. Experimentally, the coating exhibited a low thermal conductivity of 0.031 W m −1 K −1 and demonstrated remarkable photothermal performance, with 93.5 % solar absorption and 28.5 % conversion efficiency. In passive mode, the 0.8 mm coating can increase simulated skin temperature by 4.2 °C, while in active mode, rapid warming of 15.8 °C within 30 s under solar irradiation was achieved with minimized heat loss. In addition to the low-density characteristics, the coatings also exhibit excellent mechanical strength, flexibility, breathability, and water vapor transmission. This smart textile, based on the synergy of thermal conductivity inhibition and efficient photothermal conversion, presents a novel strategy for lightweight and versatile all-weather personal thermal management textiles with broad application potential.
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产品关联
DOI
高影响因子
Journal of Energy Chemistry
·
2019
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IF 5.162
Chongrong Zhang,Hui Li,Shixuan Wang,Yuliang Cao,Hanxi Yang,Xinping Ai,Faping Zhong
Thermal runaway is the main factor contributing to the unsafe behaviors of lithium-ion batteries (LIBs) in practical applications. The application of separators for the thermal shutdown has been proven as an effective approach to protecting LIBs from thermal runaway. In this work, we developed a thermal shutdown separator by coating a thin layer of low-density polyethylene microspheres (PM) onto a commercial porous polypropylene (PP) membrane and investigated the thermal response behaviors of the as-prepared PM/PP separator in LIBs. The structural and thermal analysis results revealed that the coated PM layer had a porous structure , which facilitated the occurrence of normal charge-discharge reactions at ambient temperature, although it could melt completely and fuse together within very short time periods: 3 s at 110 °C and 1 s at 120 °C, to block off the pores of the PP substrate, thereby cutting off the ion transportation between the electrodes and interrupting the battery reaction. Consequently, the PM/PP separator exhibits very similar electrochemical performance to that of a conventional separator at ambient temperature. However, it performs a rapid thermal shutdown at an elevated temperature of ∼110 °C, thus controlling the temperature rise and maintaining the cell in a safe status. Due to its synthetic simplicity and low cost, this separator shows promise for possible application in building safe LIBs.
研究领域:
材料科学
·
能源技术
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）