ACS Applied Materials & Interfaces
·
2015
·
IF 6.723
Yuwei Liu,Jing Bai,Xiaodan Jia,Xiue Jiang,Zhuo Guo
Recently, the chemo-photothermal synergistic therapy has become a potential method for cancer treatment. Herein, we developed a multifunctional nanomaterial for chemo-photothermal therapeutics based on silica and graphene core/shell structure (SiO2@GN) because of the ability of GN to convert light energy into heat. Serum protein was further modified onto the surface of GN (SiO2@GN-Serum) to improve the solubility and stability of GN-based nanoparticles in physiological conditions. The as-synthesized SiO2@GN-Serum nanoparticles (NPs) have been revealed to have high photothermal conversion efficiency and stability, as well as high storage and release capacity for anticancer drug doxorubicin (SiO2@GN-Serum-Dox). The therapeutic efficacy of SiO2@GN-Serum-Dox has been evaluated in vitro and in vivo for cervical cancer therapy. In vitro cytotoxicity tests demonstrate that SiO2@GN-Serum NPs have excellent biocompatibility. However, SiO2@GN-Serum-Dox NPs show higher cytotoxicity than SiO2@GN-Serum and free Dox under irradiation with NIR laser at 1.0 W/cm2 for 5 min owing to both SiO2@GN-Serum-mediated photothermal ablation and cytotoxicity of light-triggered Dox release. In mouse models, the tumor growth is significantly inhibited by chem-photothermal effect of SiO2@GN-Serum-Dox. Overall, compared with single chemotherapy or photothermal therapy, the combined treatment demonstrates better therapeutic efficacy. Our results suggest a promising GN-based core/shell nanostructure for biomedical applications.
研究领域:
生物医学工程
·
癌症治疗
·
纳米技术
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CONSTRUCTION AND BUILDING MATERIALS
·
2024
·
IF 7.4
Xiongfei Liu,Yi Zhang,Yongling Guo,Xiaozhong Wang
In this study, the focus is on enhancing the microwave absorption performance of magnesium phosphate cement (MPC) by incorporating Fe 3 O 4 @SiO 2 nanocomposites . The resulting MPC, fortified with hollow glass microspheres (HGM) and Fe 3 O 4 @SiO 2 , demonstrates remarkable improvements in absorption efficiency, rapid hardening, early strength , and bonding properties. Through thorough characterization using SEM, XRD, FTIR, and XPS, the uniform distribution and morphology of the Fe 3 O 4 @SiO 2 nanocomposites within the MPC matrix are confirmed. Compared to MPC treated solely with Fe 3 O 4 , the modified MPC shows a 104% increase in absorption peak value with a bandwidth of 1.20 GHz (<10 dB). The addition of SiO 2 promotes the hydration process of Fe 3 O 4 @SiO 2 within MPC, forming a uniform absorption network that enhances electromagnetic absorption efficiency. Moreover, the synergistic effects of impedance matching, multiple scattering, and interfacial polarization contribute to further enhancing microwave absorption performance.
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
高影响因子
CHROMATOGRAPHIA
·
2018
·Vol. 81
·期 7
·1043-1051
·
IF 1.401
Zhao Aixia,Xu Zhiqiang,Ma Liyi,Tian Zhenfeng,Gan Wuer
We report on the synthesis of Fe 3 O 4 @SiO 2 nanoparticles incorporated poly(divinylbenzene) monolithic column via in situ polymerization. The monolith had larger specific surface area and relatively uniform porous structure and was characterized by scanning electron microscopy, nitrogen adsorption–desorption, and Fourier transform infrared spectroscopy. The monolith was then applied for the evaluation of gas chromatography separation properties. Here, an electromagnetic induction heating technique was employed to control the column temperature with the thermal effect of eddy current in ferromagnetic materials Fe 3 O 4 . The monolith offered good separation efficiency for benzene and toluene and a higher column efficiency was obtained up to 4481 and 9216 plates per meter, respectively. In addition, the injection volume and column capacity of the proposed system are as much as 5 µL and 100 ng. This makes it possible to use a UV detector. The fabricated Fe 3 O 4 @SiO 2 nanoparticles incorporated poly(divinylbenzene) monolithic column has been shown to be very promising for gas chromatography separation. Graphical Abstract
研究领域:
分析化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Geoenergy Science and Engineering
·
2024
·
IF 0
Tiantian Zhang,Mingwei Gao,Zhiwen Li,Xiaoyong Wen,Zhiping Li,Lan Wang,Caspar Daniel Adenutsi,Qianru Yang,Qing You
Nanoparticles have been proven to be potential additives for hydraulic fracturing fluid. However, the application of nanoparticle-enhanced fracturing fluid systems in offshore low-permeability reservoirs are limited, and the mechanism by which the corresponding gel breaking fluid enhances oil recovery (EOR) is unclear. In this work, a SiO 2 -enhanced seawater-based viscoelastic surfactant (VES) fracturing fluid system was initially prepared, and the imbibition influencing factors of the SiO 2 -enhanced gel breaking fluid were systematically investigated. Subsequently, the imbibition mechanism by SiO 2 -enhanced gel breaking fluid was explored through examining its synergistic effect on interface properties and the distribution laws of oil-water phases in micropores during the imbibition process. The results showed that proposed system could maintained stability for more than 6 months, and exhibited rheological performance, yielding an increase 26% in temperature/shear resistance. Moreover, the corresponding gel breaking fluid performed an exceptional capacity for imbibition oil production, the oil recovery was increased by 7.92% compared to the conventional gel breaking fluid system and the imbibition time was extended from 30 h to 70 h. The synergistic adsorption of nano-SiO 2 and surfactants on the interface was responsible for wettability alteration and interfacial tension (IFT) reduction. Imbibition primarily occurred in mesopores, nano-SiO 2 reduced the flow resistance of oil-water two phases in pores, and the residual oil within the pores was exceedingly mobilized. This work provides foundation research of application of SiO 2 -enhanced seawater-based VES fracturing fluid in offshore low permeability reservoirs.
研究领域:
石油工程
·
材料科学
✓ 已验证
DOI
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Weixiang Yang,Jincui Ren,Yanzi Tang,Yidan Wang,Yunuo Yang
To improve oxidation resistance of alumina-carbon refractories, SiO 2 -B 4 C-glass composite coating was prepared by slurry brushing method. The coated sample was heat treated in argon atmosphere to improve compactness and oxidation resistance of the coating. Effects of heat treatment temperature and time on microstructure and oxidation resistance of the coating were studied. Results showed that after heat treatment at 800 °C, borosilicate glass powder in the coating melted into glass phase, which could fill holes and cracks of the coating. As heat treatment temperature increased to 900 °C, viscosity of the glass phase decreased, resulting in the better self-healing ability and oxidation resistance of the coating. When heat treatment time increased to 1.5 h, some glass phases flowed away from the coating surface due to its large fluidity, so oxidation resistance of the coating decreased. When heat treatment temperature was too high (1000 °C), B 2 O 3 in the glass powder was eutectic with SiO 2 , more glass phase with larger fluidity generated, which leaded to that thickness and oxidation resistance of the coating both decreased. After heat treatment at 900 °C for 0.5 h, microstructure of the coating was smooth and compact, leading to its good oxidation resistance. Weight loss of the coated sample was only −1.041 % after oxidation at 800 °C for 80 h.
研究领域:
材料科学
·
无机化学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2021
·
IF 6.707
Hang Jia,Xiao Zhang,Xuejun Zeng,Rui Cai,Zhouli Wang,Yahong Yuan,Tianli Yue
With the increased risk of wound infection caused by pathogenic bacteria, silver nanoparticles have been considered as potential antibacterial nanosystem. However, the challenge of size control and agglomeration of silver nanoparticles need to be considered. Herein, the application of flower-like silver nanoparticles (Ag NPs) anchored Fe 3 O 4 @SiO 2 @MnO 2 hybrids (Ag/FSM) in the control of pathogenic bacteria and promotion of wound healing were reported. TEM results indicated the ultrafine Ag NPs were uniformly dispersed onto the surface of FSM. In vitro experimental results showed the Minimum inhibitory concentration (MIC) of Ag/FSM against Escherichia coli ( E. coli ) and Staphylococcus aureus ( S. aureus ) were 60 and 100 μ g mL −1 , respectively. Furthermore, in vivo investigation in mice demonstrated that the hybrids showed low toxicity and effectively promoted wound healing caused by the infection of E. coli . In summary, the results supported the possibility that Ag/FSM could be considered as an antibacterial agent with potential for the treatment of bacterial infections.
研究领域:
材料科学
·
生物学
·
医学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2019
·
IF 3.45
Xiaoqian Song,Qianyi Guo,Zhenlu Cai,Jianrong Qiu,Guoping Dong
Carbon quantum dots (CQDs) with multi-color emission are synthesized through hydrothermal method by varying the ratio of citric acid (CA) and urea, the solvent (water, ethyl alcohol, and dimethylformamide), the hydrothermal temperature, and reaction time. The CQDs emit bright fluorescence which can be gradually tuned from blue to red continuously, almost covering the whole visible spectrum. The emission peaks of the CQDs shift from 450 nm to 650 nm with the surface groups and structures changing. Importantly, all solid state CQDs@SiO 2 nanophosphors are successfully synthesized by reversed-phase micromulsion method. Based on these solid state phosphors, multi-color CQDs@SiO 2 phosphors-based light-emitting diodes (LED) and white light-emitting diode (WLED) with a Commission Internationale de L’ Eclairage (CIE) value of (0.3497, 0.3045) are fabricated in a low-cost, environment-friendly way.
研究领域:
材料科学
·
光学工程
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
Catalysis Science & Technology
·
2017
·Vol. 7
·期 13
·2717-2728
·
IF 5.773
Chaoquan Hu,Jiahan Sun,Dongjuan Kang,Qingshan Zhu,Yafeng Yang
Gas-phase hydrogenation of 1,3-butadiene was investigated over Pt/SiO2 catalysts with the aim of understanding the complete hydrogenation of dienes. The measurements focused on the effect of Pt dispersion on the product distribution and the kinetics of n-butane formation. Under the investigated conditions with an excess of hydrogen, the selectivity to n-butane sharply decreased from 41.6% to less than 3% at a 1,3-butadiene conversion of ∼10% when the average Pt particle size increased from 3.9 to 22 nm. Correspondingly, the apparent activation energy for n-butane formation was measured to increase by about 2.7 times. In situ diffuse reflectance infrared Fourier transform (DRIFT) observations via alternating 1,3-butadiene and hydrogen feeds over the catalysts demonstrated that 1-butene was the major reaction intermediate in the process of 1,3-butadiene hydrogenation. By analysis of the kinetic data using the Horiuti–Polanyi mechanism with 1-butene as the intermediate, different reactivities of hydrogen on the catalysts towards CC bond hydrogenation were proposed to understand the variation of the selectivity to n-butane with Pt dispersion. This viewpoint was further supported by DFT calculation of 1-butene hydrogenation with hydrogen at different sites on the Pt(111) surface.
研究领域:
催化化学
·
材料科学
·
表面科学
✓ 已验证
产品关联
DOI
高影响因子
OPTICAL MATERIALS
·
2020
·
IF 2.779
Xiaoyu Sun,Xiaozhuang Xu,Guanyu Song,Jielei Tu,Lei Li,Pinyuan Yan,Weinan Zhang,Kai Hu
The broadband antireflective coatings (ARCs) can effectively reduce the optical loss in the transmittance process and improve energy efficiency in solar cells. MgF 2 /SiO 2 bilayer films were prepared on the surface of soda–lime substrates via sol – gel spin-coating combined with electron beam (e-beam) evaporation. The bottom layer was the MgF 2 film obtained from e-beam evaporation, whereas the top layer was the nanoporous SiO 2 film via sol–gel spin-coating method. The refractive indices of MgF 2 and SiO 2 layers at 550 nm are 1.38 and 1.12, respectively. The structural, morphological, and optical properties of the films were characterized. The effects of annealing temperature, Triton X-100 concentration, and spin-coating speed on the properties of the film were investigated. The transmittance spectra of the coatings were investigated, and the broadband antireflective performance of the bilayer structure was examined. A bilayer coating with optical properties close to the theoretical design results was obtained by optimizing the refractive index and the thickness of the double coatings. The solar transmittances of the soda–lime glass coated with the MgF 2 /SiO 2 bilayer antireflective film increased by 8.89% at 400–800 nm. The multilayer antireflective film exhibits promising applications in photoelectric devices, high power laser systems, and antidazzle glasses.
研究领域:
材料科学
·
光学工程
✓ 已验证
产品关联
DOI
高影响因子
WATER RESEARCH
·
2020
·
IF 9.13
Dingyuan Liang,Xiangrui Wang,Ying Wang,Zhaomin Dong,Xiaoli Zhao,Wenhong Fan
Dissolved organic matter (DOM) in aquatic ecosystems reshapes the surface of nanoparticles (NPs) greatly. Understanding how these changes influence the bioavailability of NPs is critical for accurately predicting the ecological risks of NPs. A quantitative model based on the two-step internalization process enabled the differentiation between the adhesion ability of NPs to membranes and the internalization capacity. Using protozoa Tetrahymena thermophila as the test organism, fluorescein isothiocyanate-modified silica NPs (FITC-SiO 2 ) and silica-coated gold NPs (Au@SiO 2 ) were prepared to validate the model and study the influence of DOM on uptake. DOM reduced the ability of Au@SiO 2 to adhere onto cell membranes and the inhibitory effect of bovine serum albumin (BSA) and β-lactoglobulin was higher due to their higher molecular weights and the weaker interaction. Moreover, DOM increased the internalization capacity. 80% Au@SiO 2 was internalized in the presence of humic acid (HA), over 90% Au@SiO 2 was internalized in the presence of the two proteins, whereas only 60% were internalized by the control group. Next, the specific recognition of the cell internalization in the presence of DOM was confirmed. We concluded that the traditional “accumulation” may misestimate the true biological effect caused by NPs coated with DOM. NPs coated with highly bioavailable DOM pose a greater risk to aquatic ecosystems because they are more likely to be internalized by living organisms.
研究领域:
环境科学
·
生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Wenyuan Ye,Jinjie Chen,Na Kong,Qingyuan Fang,Mingqiu Hong,Yuxiang Sun,Yifan Li,Patricia Luis,Bart Van der Bruggen,Shengqiong Fang,Shuaifei Zhao,Jiuyang Lin,Shungui Zhou
Conventional membrane processes, e.g., microfiltration and ultrafiltration, suffer from severe permeation flux decline and fouling during the oily wastewater treatment. The superhydrophilic surface decoration provides an important and effective strategy to address this challenge. Herein, a surperhydrophilic/underwater superoleophobic nanocomposite surface with the photocatalytic properties was constructed via one-step facile vacuum-assisted filtration of a g-C 3 N 4 nanosheet/SiO 2 nanoparticle dispersion onto a microfiltration membrane substrate. Specifically, with the intercalation of 20 mg∙L −1 SiO 2 nanoparticles into the g-C 3 N 4 nanosheets, the g-C 3 N 4 /SiO 2 composite membrane showed the superhydrophilic/underwater superoleophobic properties with an underwater oil contact angle of 170.0 ± 0.3°. Such a g-C 3 N 4 /SiO 2 composite membrane yielded a permeation flux of >1290 LMH·bar −1 with an oil rejection of >99.91% during the vacuum filtration of oil-in-water emulsions. The g-C 3 N 4 /SiO 2 composite membrane significantly outperformed the pristine microfiltration substrate that had severe fouling caused by oil blockage. Additionally, the g-C 3 N 4 /SiO 2 composite membrane not only effectively retained the E. coli bacteria through size exclusion effect, but also promoted the inactivation of bacteria via visible-light photocatalysis. Therefore, our membrane has a great promise in practical oily wastewater treatment due to its excellent separation performance and biofouling resistance.
研究领域:
环境科学
·
材料科学
·
生物学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry C
·
2022
·Vol. 10
·期 45
·17109-17118
·
IF 8.067
Jiamin Sun,Zhentong Lu,Yi Liu,Dongwei Zheng,Juqing Li,Lei Jin,Jiayu Zhang,Haoran Zhang,Yingliang Liu,Xuejie Zhang,Bingfu Lei
Laser-driven projection technology urgently requires green emitters with a narrow bandwidth, high quantum efficiency, and long-term stability to compensate for the “green gap”. Herein, a highly stable CsPbBr3–SiO2 glass ceramic film was synthesized by co-sintering high-photostability CsPbBr3–SiO2 powder and low-melting glass frit on sapphire, where the high thermal conductivity of sapphire and the SiO2 barriers could help maintain the stability of CsPbBr3 nanocrystals (NCs), endowing the well-known CsPbBr3 material with the possibility of application in the field of laser-driven projection displays. Furthermore, a “fluorescence wheel” was fabricated by pasting the CsPbBr3–SiO2 glass ceramic film on a micro motor, which could effectively alleviate the thermal quenching and increase the laser saturation threshold. Benefiting from its elaborate design, the operating temperature of the glass ceramic film was reduced from 351 °C to 75 °C and its luminescence intensity was maintained at 86% of its initial brightness at the laser power density of 4.5 W mm−2 for 60 min. As a proof-of-concept experiment, an all-inorganic multi-color fluorescent plate with red and green light emissions was obtained by combining the K2SiF6:Mn4+ phosphor and CsPbBr3–SiO2 powder in a patterned manner on sapphire, which provides an idea for the application of CsPbBr3 NCs and K2SiF6:Mn4+ phosphor in laser projection systems.
研究领域:
材料科学
·
光学工程
✓ 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）