NEW JOURNAL OF CHEMISTRY
·
2018
·Vol. 42
·期 7
·4981-4990
·
IF 3.201
Min Wang,Ke-yan Zheng,Shao-wu Lv,Hai-feng Zou,Hong-sen Liu,Gang-lin Yan,Ai-dong Liu,Xiao-fang Fei
Besides having many important physiological functions, cell membrane proteins have been recognized as major markers for many diseases in clinical examination. The discovery of new cell membrane proteins has attracted significant research interest. Herein, a multifunctional Fe3O4@SiO2/CdTe nanocomposite was designed for the detection and separation of cell membrane proteins, which was synthesized by a covalent coupling reaction between amino groups and carboxyl groups. It can serve as a universal tool for modifying antigens or other molecules that have amino groups. To verify the feasibility and practicability of this method, a folic acid (FA)-functionalized magnetic/fluorescent nanoprobe (Fe3O4@SiO2/CdTe-NH-FA) has been developed for recognizing and separating the FA receptor on HepG2 cells. FA was fixed to the shell of Fe3O4@SiO2/CdTe nanocomposites via 1,6-hexamethylenediamine. It obviously reduces the fluorescence quenching effect of FA on magnetic/fluorescent nanocomposites. The results demonstrate that the synthesized nanoprobe Fe3O4@SiO2/CdTe-NH-FA provides excellent optical characteristics for the reliable imaging of cancer cells and has good magnetic properties to enrich and isolate cell membrane proteins. Consequently, this biological nanoprobe can be used to find, obtain, and study unknown membrane proteins and predict the occurrence of some diseases. In addition, this nanoprobe will be a potential platform for accurate cancer diagnosis and therapy in the future.
研究领域:
纳米技术
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生物化学
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分子生物学
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癌症研究
✓ 已验证
产品关联
DOI
高影响因子
SURFACE & COATINGS TECHNOLOGY
·
2023
·
IF 5.4
Yang Guo,Xiaoying Guo,Haipeng Lu,Xian Jian
Developing high–efficient microwave absorbing (MA) materials with anti–corrosion (AC) properties to tackle the harsh hygrothermal marine conditions remains a challenge. Herein, we employed catalytic chemical vapor deposition and the Stöber technique to fabricate gradient multilayer interface–coupled FeNi@C@SiO 2 composites, guided by the hetero–interface engineering. The resulting composites exhibited exceptional MA properties and AC behavior. Specifically, they showcased a remarkable effective absorption bandwidth of 6.27 GHz at 1.40 mm, outperforming that of FeNi (3.80 GHz). This improved bandwidth was attributed to the electron conduction pathway provided by the C layer, which facilitated electron migration and hopping. The C@SiO 2 layer, containing defects and –OH functional groups, induced abundant dipole polarization and optimizes the impedance matching of FeNi. Furthermore, the RCS reduction value of FeNi@C@SiO 2 could reach 16.73 dB·m 2 . Moreover, the corrosion rate of FeNi@C@SiO 2 was 7.48 × 10 −11 m/s, significantly lower than that of FeNi (1.29 × 10 −10 m/s). This reduction was primarily due to the intrinsic inertness and impermeability of the C@SiO 2 layer, effectively isolating the corrosive medium from the substrate. This investigation presents a novel point of reference for the advancement of bifunctional MA materials intended to cope with extreme environments.
研究领域:
材料科学
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纳米复合材料
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表面工程
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电磁功能材料
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腐蚀防护
✓ 已验证
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2017
·
IF 9.446
Jinze Lyu,Junxian Gao,Min Zhang,Yanhong Wang,Dandan Hu,Juan Yi,Junbo Zhong,Ji Li,Shuo Wang
The distribution of bulk and surface defects significantly affects the separation and injection of photogenerated charge carriers. In this study, we provide a strategy of SiO 2 -shell-enhanced F modification to optimize the distribution of bulk and surface defects. The effects of SiO 2 coating and F modification on the physical structure, the separation behavior of photogenerated charge carriers, and the photocatalytic activity of P25 were studied by transmission electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy, surface photovoltage spectroscopy, and toluene degradation experiments. Results showed that the removal rate of toluene over SiO 2 -F-modified P25 was significantly higher than those over P25 and F modified P25. The SiO 2 -shell-enhanced F modification simultaneously increased the content of surface Ti 3+ and reduced the bulk defects, thereby enhancing the separation of charge carriers. Furthermore, F doped at surface exerted a strong catalytic effect on the removal of toluene, whereas F doped in lattice caused the recombination of photogenerated charge carriers. The SiO 2 coating and calcination treatment significantly increased the amount of F ions doped at TiO 2 surface and inhibited F doping in lattice.
研究领域:
环境科学
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材料科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2016
·
IF 4.758
Ye Zhu,Zhixuan Cheng,Qun Xiang,Xikun Chen,Jiaqiang Xu
Mesoporous TiO 2 -SiO 2 functionalized with p-hexa-fluoroisopropanol aniline (HFIP) was designed and synthesized to achieve highly sensitive and selective sensing toward nerve agent simulant dimethyl methylphosphonate (DMMP) due to a hydrogen bonding between target DMMP and TiO 2 -SiO 2 -HFIP. The sensing experiments were conducted by coating compounds onto quartz crystal microbalance (QCM) transducers. It was found that the observed frequency shifts gradually and turned saturated in the range from 10 to 60 ppm. Gas sensing test results revealed that sensors had enhanced sensitivity due to the decoration of HFIP on TiO 2 -SiO 2 in a ppb level. Furthermore, when the doping of HFIP reached 20 wt%, the sensors achieved the best sensing performance. In conclusion, the QCM sensor coated with mesoporous TiO 2 -SiO 2 -HFIP exhibited fast response, excellent reversibility and high selectivity to nerve agent stimulant DMMP vapor, implying that mesoporous TiO 2 -SiO 2 -HFIP may be a good candidate for sensing DMMP.
研究领域:
材料科学
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化学传感
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纳米技术
✓ 已验证
产品关联
DOI
高影响因子
GREEN CHEMISTRY
·
2025
·
IF 9.2
Man Yang,Shuhao Qin,Youchang Yang,Mingmi Wu,Ting Lei,Yufei Liu,Huiju Shao
Owing to the global transition toward carbon neutrality, lithium-ion batteries (LIBs) are experiencing unprecedented demand growth as key energy storage components. A contact-electro-catalysis (CEC) method has been utilized in recycling spent LIBs for some time due to the process economy, efficiency and environmental sustainability. However, systematic investigations into the effects of the microstructure and surface chemical environment of dielectric materials on their catalytic activity in the CEC process remain scarce. Here, we demonstrated that the metal leaching efficiency simultaneously depended on the size and porous structure of SiO2 microspheres. Appropriate size and narrow distribution could dominantly diminish the scattering intensity of ultrasonic waves to gather energy and then facilitate the formation of cavitation bubbles to generate abundant electrons and radicals. Similarly, the porous structure also promoted the generation of electrons and radicals by enhancing aqueous-phase contact interfaces. Moreover, we manipulated the surface chemical environment of porous SiO2 microspheres by incorporating sodium alginate (SA) and polyethyleneimine (PEI). Hydroxyl, carboxyl and amino groups and –COO−/–NH3+-microstructures not only accelerated electron transfer from water molecules to SiO2 microspheres, inducing hydroxyl radicals, but also boosted electron transfer from SiO2 microspheres to O2, generating superoxide radicals. Consequently, under the experimental conditions established in this study, approximately 100% leaching efficiency of metals in the spent ternary cathode was achieved in 8 h at 80 °C due to the synergistic effect of hydroxyl and superoxide radicals. We anticipate this innovative strategy will significantly expand the applicability of CEC in LIB recycling, thereby addressing the growing global demand for sustainable LIBs.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2025
·
IF 9
Liyuan Zhang,Yiming Li,Feng Liu,Xiaoyu Zhang,Hongyu Chan,Yueyao Liang,Kuanjun Fang
Particulate matter (PM) contamination constituted a significant threat to both human well-being and the worldwide ecological system. However, protective masks achieved high-performance filtration of the PM by tightly stacking fibers, especially for PM 0.1 , which seriously affected the wearing comfort. Herein, a Nylon-6/SiO 2 composite fiber membrane with two-dimension (2D) narrow pore but 3D fluffy structure was designed to harmoniously combine high-performance filtration capabilities with comfort. Based on one-step multi-jet free-surface air-jet spinning and spraying, the introduction of nano-SiO 2 spheres enhanced the surface roughness of the fiber and reduced the pore size of the 2D fiber layer in the membrane structure, improving PM 0.1 particle capture. Additionally, the addition of micro-SiO 2 spheres could construct a fluffy 3D reticular architecture in the membrane, enhancing the flow of air and minimizing gas resistance during the filtration process. Due to the structural design featuring small pores and low packing density, the Nylon-6/SiO 2 -NM membrane exhibited an excellent PM removal rate of 99.99 % and low air resistance of 101 Pa at the flow rate of 32 L/min. At the flow rate of 85 L/min, the filtration efficiency of 99.9 % could be achieved, and the gas resistance was 254 Pa, the performance conformed to the GB 19083-2011. Moreover, the Nylon-6/SiO 2 -NM mask simultaneously possessed superior wearing comfort with air permeability (277.09 mm/s) and moisture permeability (196.50 g·m −2 ·h −1 ) and UV protection (UPF value of 136), as well as good thermal comfort. This research had the potential to introduce a fresh perspective on developing advanced, high-performance, and user-friendly personal protective materials.
研究领域:
材料科学
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环境科学
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生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
Catalysis Science & Technology
·
2014
·Vol. 5
·期 1
·405-414
·
IF 4.76
Hongmei Liu,Kai Tao,Chunrong Xiong,Shenghu Zhou
In this work, Pd–NiO@SiO2 core–shell mesoporous nanocatalysts with ~4 nm Pd–NiO heteroaggregate nanoparticle cores and ~17 nm mesoporous silica shells were successfully synthesized by a sol–gel method. The surfactant-capped PdNi alloy nanoparticles were coated with SiO2 through hydrolysis of tetraethylorthosilicate to obtain PdNi@SiO2 nanoparticles, and the mesoporous Pd–NiO@SiO2 core–shell nanocatalysts were formed after removal of surfactants by calcination at 500 °C and subsequent H2 reduction at 200 °C. The characterization results by XRD, TEM and BET revealed that Pd–NiO@SiO2 nanocatalysts were highly stable with the maintenance of intact core–shell structures under high-temperature thermal treatments. The Pd–NiO@SiO2 nanocatalysts illustrated a superior catalytic performance for p-chloronitrobenzene hydrogenation with H2 to the control Pd@SiO2 nanocatalysts. The catalytic performance enhancement of Pd–NiO@SiO2 nanocatalysts is ascribed to the strong interaction between Pd and NiO in the cores, where the interfaces may be beneficial for hydrogenation reactions.
研究领域:
材料科学
·
化学工程
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纳米技术
·
催化
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Sheng-Jin He,Jia-Pei Chen,Wei-Ming Guo,Xiu-Bing Chen,Huan Zhou,Chuang-Tian Zhan,Shi-Kuan Sun,Yun Li,Li-Xiang Wu,Jia-Xiang Xue,Hua-Tay Lin
In this study, CaO–Al 2 O 3 –MgO–SiO 2 glass was utilized to join SiC after surface polishing and etching, without the application of pressure. To join polished SiC at 1250 °C using CaO–Al 2 O 3 –MgO–SiO 2 glass proved unsuccessful. However, when polished SiC was joined at 1350 °C, the joint shear strength was 108.0 ± 15.5 MPa. Etching polished SiC with a NaOH–K 3 [Fe(CN) 6 ] solution effectively removed surface carbon, resulting in numerous micro-pits, that increased the joining area and improved the wettability of CaO–Al 2 O 3 –MgO–SiO 2 glass. The joint strengths of etched SiC joined at 1250 °C and 1350 °C were 29.0 ± 11.6 MPa and 125.1 ± 19.6 MPa, respectively. After ablation at 1200 °C for 10 min, the retained strength of the etched joints (joined at 1350 °C) was 61.9 ± 4.0 MPa, whereas the strength of the polished joints decreased to only 36.6 ± 10.7 MPa. Surface etching demonstrates the potential to significantly enhance the strength and high-temperature resistance of SiC joints.
研究领域:
材料科学
·
陶瓷工程
·
表面工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2014
·
IF 2.726
Chenglong Zhang,Weidong Xiang,Hongyan Luo,Haitao Liu,Xiaojuan Liang,Xin Ma,Lang Pei,Zhaoping Chen,Jinsong Li,Haihong Gao,Li Ma
Lead-nanoparticles-doped Na 2 O–B 2 O 3 –SiO 2 (NBS) glass was prepared by sol–gel and atmosphere control methods. The formation mechanism and the microstructure of the specimens were investigated by differential thermal analysis and thermal gravimeter, X-ray diffraction, transmission electron microscopy, selected area electron diffraction, energy dispersive X-ray spectroscopy, and nitrogen adsorption measurements, respectively. The linear and nonlinear optical properties of the glass were analyzed by UV/VIS/NIR spectrophotometry and Z -scan technology. The results showed that the Pb nanoparticles in spherical shape with the average particle size about 18.9 nm belong to cubic crystal system and have good crystallinity and dispersibility in the glass matrix as well as exhibit excellent nonlinear optical properties. The specimen has a high linear optical transmittance, and little absorption peaks appear in the examined wavelength range. The third-order optical nonlinear parameters calculated are γ of 1.67 × 10 −16 m 2 /W, β of 7.02 × 10 −11 m/W, and χ (3) of 2.61 × 10 −17 m 2 /W 2 .
研究领域:
材料科学
·
光学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
Journal of Applied Spectroscopy
·
2018
·Vol. 85
·期 1
·160-165
·
IF 0.611
Neng Jing,Wang Xujun,Jia Kan,Sun Peilong
Fe 3 O 4 nanoparticles were first modified with tetraethoxylsilane to form Fe 3 O 4 /SiO 2 nanoparticles, followed by the addition of 3-aminopropyltriethoxysilane and 3-thiolpropyltriethoxysilane to introduce –NH 2 and –SH groups to the surface of Fe 3 O 4 /SiO 2 nanoparticles. Gold nanoparticles were further assembled on the surface of Fe 3 O 4 /SiO 2 via the electrostatic adsorption of –NH 2 and the Au–S bond to produce stable core–shell Fe 3 O 4 /SiO 2 /Au gold/magnetic nanoparticles. These Fe 3 O 4 /SiO 2 /Au gold/magnetic nanoparticles were characterized by a variety of techniques such as transmission electron microscopy (TEM) and energy dispersive X-ray spectroscopy (EDX), and afterwards conjugated with tetrodotoxin antibodies (Ab) and used as a Raman active substrate (Fe 3 O 4 /SiO 2 /Au–Ab) with Rhodamine B (RhB)-labeled tetrodotoxin antibody as a Raman reporter (Ab–RhB). Upon mixing these reagents with tetrodotoxin (TTX), a sandwich complex [Fe 3 O 4 /SiO 2 /Au–Ab···TTX···Ab–RhB] was generated due to the specific antibody–antigen interactions. The immunocomplex was subsequently separated by an externally applied magnetic source and concentrated into a pellet point, where the laser interrogation of the pellet produced a strong signal characteristic of RhB. The logarithmic intensity of the signal was found to be proportional to the concentration of TTX with a limit of detection of 0.01 μg/mL and a detection linearity range of ~ 0.01–0.5 μg/mL. The established method eliminates the complicated procedures of traditional centrifuging, column separation, and incubation and achieves a rapid detection of tetrodotoxin with improved detection sensitivity.
研究领域:
分析化学
·
纳米技术
·
毒理学
✓ 已验证
产品关联
DOI
高影响因子
TRANSITION METAL CHEMISTRY
·
2024
·Vol. 49
·期 3
·195-213
·
IF 1.6
Gharbi Ahlam Hacine,Hemmami Hadia,Laouini Salah Eddine,Bouafia Abderrhmane,Ben Amor Ilham,Zeghoud Soumeia,Gherbi Mohammed Taher,Ben Amor Asma,Alharthi Fahad,Abdullah Johar Amin Ahmed
A novel CuO–SiO 2 nanoadsorbent, incorporating copper oxide (CuO) and silicon dioxide (SiO 2 ), has been successfully synthesized using three distinct preparation processes: Mode-A (solution and solution), Mode-B (solution and nanoparticles), and Mode-C (nanoparticles and nanoparticles). The investigation focuses on evaluating the efficiency of the CuO–SiO 2 nanoadsorbent, considering its synthesis process, reusability, and sustained performance over time, particularly in the removal of Rose Bengal dye. Characterization results revealed the formation of CuO–SiO 2 nanocomposites structure irregular shapes morphology across all three-preparation processes. The average particle sizes for Mode-A, Mode-B, and Mode-C nanocomposites were determined as 18.1 nm, 15.6 nm, and 14.8 nm, respectively. Furthermore, the band gap energies of the CuO–SiO 2 nanocomposites were measured at 2.2 eV, 1.8 eV, and 3.29 eV for Mode-A, Mode-B, and Mode-C, respectively. Remarkably, the CuO–SiO 2 nanocomposite prepared using Mode-B demonstrated superior photocatalytic activity in degrading the anionic dye Rose Bengal, achieving a degradation coefficient of 84.8%. In comparison, CuO NPs, tested under the same experimental conditions (120 min contact time, pH = 7, temperature of 25 °C, and solar light irradiation), achieved a degradation coefficient of 78.8%. These findings highlight the potential of the CuO–SiO 2 nanoadsorbent, particularly when synthesized via Mode-B, for effective and environmentally friendly dye degradation applications.
研究领域:
纳米技术
·
环境科学
·
材料科学
·
光催化
·
水处理
✓ 已验证
DOI
高影响因子
APPLIED CATALYSIS A-GENERAL
·
2024
·
IF 4.7
Chen Li,Liting Wei,Min Chen,Jiayi Zhang,Yang Yang,Boping Liu,Yulong Jin
CrO x /VO x /TiO 2 -SiO 2 was prepared via solvent-free and conventional wet-impregnation process with ethanol as solvent. The results of ICP-OES, N 2 adsorption-desorption, SEM-EDX, Raman and DR-Uv-vis spectra indicate that well-dispersed Cr and V sites in isolated state were the main species. Bimodal ultra-high molecular weight polyethylene/high-density polyethylene in-reactor blends (UHMWPE/HDPE IRBs) could be synthesized with polymerization activity ＞ 1×10 7 gPE·mol −1 Cr·h −1 . Moreover, the two catalysts displayed similar catalytic behaviors in temperature sensitivity, H 2 response and 1-hexene copolymerization efficiency, and their polymer products also show comparable molecular weight and molecular weight distribution , which implies analogous structures of their well-dispersed active sites. By contrast, the catalyst prepared by wet-impregnation process with water as solvent exhibited poor dispersity, which is reflected by its much lower activity and very different catalytic behaviors and polymer properties when compared with the well-dispersed catalysts. Therefore, the economic and green solvent-free process is promising for preparing highly-active CrO x /VO x /TiO 2 -SiO 2 .
研究领域:
材料科学
·
高分子化学
✓ 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）