JOURNAL OF ENVIRONMENTAL MANAGEMENT
·
2024
·
IF 8
Meichen Liu,Meichen Gao,Xu Shi,Yilin Yin,Huanyi Liu,Ruirui Xie,Chenxi Huang,Wenwen Zhang,Shiwen Xu
With the increasing development of the society, silicon dioxide (SiO 2 ) has been used in various fields, such as agriculture, food industry, etc., and its residues can pose a potential health threat to organisms. Quercetin (Que) is a potent free radical scavenger commonly found in plants. C57BL/6 mice were chosen to established a mouse model of SiO 2 exposure and Que antagonism to investigate the mechanism of action of Que in rescuing the toxic damage of SiO 2 on mouse cerebellum tissue. The results showed that cytoplasmic vacuolization, and inflammatory cell infiltration caused by SiO 2 were alleviated by the addition of Que, and reduced oxidative stress in mouse cerebellum, alleviated the activation of TLR4 pathway induced by SiO 2 , and substantially reduced the occurrence of ZBP-1-mediated PANoptosis induced by SiO 2 exposure in mouse cerebellum. In NS20Y cells, the oxidative stress activator (Elesclomol) and inhibitor N-acetyl cysteine (NAC), and the NF-κB activator 2 (NA2) were added. Elesclomol and NAC confirm the involvement of ROS in regulating the TLR4/NF-κB pathway, the TLR4/NF-κB pathway regulated ZBP-1-mediated PANoptosis in cerebellum and NS20Y cells induced by SiO 2 exposure. In conclusion, the present experimental data suggest that Que mitigates the onset of ZBP-1-mediated PANoptosis in neuronal cells induced by SiO 2 through the ROS/TLR4/NF-κB pathway. The present experimental findings help to understand the detoxification effect of Que in more tissues and provide an important reference for the rescue of organisms in long-term SiO 2 environment.
研究领域:
神经生物学
·
毒理学
·
细胞信号传导
✓ 已验证
DOI
高影响因子
ACS Omega
·
2022
·
IF 4.132
Lin Luo,Zhihao Gao,Zongmin Zheng,Jianmin Zhang
In this work, a facile casting method was utilized to prepare “polymer-in-ceramic” microporous membranes for thermally safe battery separator applications; that is, a series of composite membranes composed of silicon dioxide (SiO2) as a matrix and polyvinylidene fluoride (PVDF) as a binder were prepared. The effects of different SiO2 contents on various physical properties of membranes such as the porosity, electrolyte absorption rate, electrochemical stability, and especially thermal stability of the SiO2/PVDF composite membranes were systematically studied. Compared with a commercial polypropylene separator, the SiO2/PVDF membrane has a higher porosity (66.0%), electrolyte absorption (239%), and ion conductivity (1.0 mS·cm–1) and superior thermal stability (only 2.1% shrinkage at 200 °C for 2 h) and flame retardancy. When the content of SiO2 in the membrane reached 60% (i.e., PS6), LiFePO4/PS6/Li half-cells exhibited excellent cycle stability (138.2 mA h·g–1 discharging capacity after 100 cycles at 1C) and Coulombic efficiency (99.1%). The above advantages coupled with the potential for rapid and large-scale production reveal that the “polymer-in-ceramic” SiO2/PVDF membrane has prospective separator applications in secondary lithium-ion batteries.
研究领域:
材料科学
·
电化学
·
能源技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
·
2021
·Vol. 413
·期 19
·4751-4761
·
IF 4.157
Cai Rongyuan,Lu Dechan,She Qiutian,You Ruiyun,Feng Shangyuan,Lin Xueliang,Lu Yudong
When nitrite is ingested and absorbed by the body, it can be converted into highly toxic nitrosamines (carcinogens, teratogens, and mutagens), posing health risks to the general population. Therefore, it calls for establishing a method for determination of nitrite. In this paper, the glass-SiO 2 -Ag surface-enhanced Raman scattering (SERS) substrate with a large number of “hot spots” were prepared by two kinds of silane coupling agents. The SERS substrate had high sensitivity and repeatability. Silicon dioxide supported the silver nanoparticles (Ag NPs), which increased surface roughness of the substrate, generated a great quantity of hot spots and enhanced the SERS signal. In the SERS spectrum, the intensity ratio of the two characteristic peaks (1287 cm −1 and 1076 cm −1 ) had a good linear correlation with the logarithm of the concentration of nitrite, R 2 = 0.9652. The recoveries of 50 μM and 100 μM nitrite in three kinds of foods, three kinds of cosmetics and tap water were 90.9–105.3%. Graphical abstract
研究领域:
分析化学
·
环境科学
·
食品安全
✓ 已验证
DOI
高影响因子
IEEE TRANSACTIONS ON DIELECTRICS AND ELECTRICAL INSULATION
·
2018
·Vol. 25
·期 3
·1003-1013
·
IF 1.774
Youyuan Wang,Can Wang,Zhanxi Zhang,Kun Xiao
This paper reports on the anti-thermal aging ability enhanced by nanoparticles for polyethylene based nanocomposites. Nanocomposites with concentration of 1 wt% were prepared by using silicon dioxide (SiO
2
), zinc oxide (ZnO) and magnesium oxide (MgO) nanoparticles. Fourier-transform infrared spectra showed that the low-density polyethylene (LDPE)/MgO nanocomposites had the best anti-thermal aging ability in comparison with the LDPE/SiO
2
nanocomposites, which had the worst anti-thermal aging ability. Subsequently the ability of nanocomposites to ensure the electrical properties was examined by dielectric properties and space charge distribution. The results show that LDPE/MgO and LDPE/ZnO nanocomposites retained the value and the relaxation peaks of permittivity to a certain extent after thermal aging. All of the nanocomposites presented the ability for suppression of space charge accumulation after thermal aging compared with neat LDPE with the observation of obvious homocharges accumulated near electrodes. We find that the interface between nanoparticles and matrix may be the reason for the anti-thermal aging ability exhibited by the nanocomposites.
研究领域:
材料科学
·
电气工程
✓ 已验证
DOI
高影响因子
IONICS
·
2021
·Vol. 27
·期 4
·1385-1392
·
IF 2.817
Chen Zhi,Xiang Tong,Xiong Qingming,Chen Li,Yang Huiyong,Feng Zhijun,Li Xibao,Shen Xing,Huang Juntong
SiO 2 -based anodes for lithium ion batteries (LIBs) suffer from low conductivity and volume change in charge/discharge processes. It is reported that reasonable amorphous and nanometric characteristics can effectively improve the activity of SiO 2 for Li + storage. So, highly active SiO 2 @C nanofibers were prepared by electrospinning. Using X-ray diffraction (XRD), its amorphous characteristics were revealed. The results from scanning electron microscopy (SEM) and transmission electron microscopy (TEM) showed that it was a nanofiber structure. As an anode for LIBs, the SiO 2 @C nanofibrous electrode showed the discharge capacities of 675 and 188 mAh g −1 at 1 A g −1 (1000the cycle) and 10 A g −1 (5000th cycle), respectively. Even at 50 A g −1 , it still maintained 88 mA h g −1 at 60,000 cycles, showing excellent stability and high rate.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2015
·
IF 2.752
Dongming Qi,Chenghai Liu,Zhijie Chen,Hangnan Chen,Chujuan Huang,Zhihai Cao
A formation mechanism of guava-like polymer/SiO 2 nanocomposite particles (NCPs) in in situ emulsion (co) polymerization systems based on the enhanced homogenous nucleation was proposed in the present paper. The reactive 3-(trimethoxysilyl) propyl methacrylate modified SiO 2 nanoparticles (NPs) were chemically linked to form a large amount of SiO 2 clusters at the beginning of polymerization. The formation of the SiO 2 clusters driven by highly efficient grafting reaction of monomers to SiO 2 NPs could be regarded as an enhanced homogenous nucleation process. The SiO 2 clusters functioned as the main polymerization loci to form guava-like polymer/SiO 2 NCPs in the following polymerization process. The morphological evolution of the polymer/SiO 2 NCPs, and the role of the grafting reaction and nucleation pattern in the formation of the guava-like polymer/SiO 2 NCPs were systematically investigated.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2018
·
IF 3.141
Da Wang,Zhong Wang,Guangci Li,Xuebing Li,Bo Hou
SiO2-modified high thermal conductivity Al2O3@Al composites were synthesized and supported cobalt for Fischer–Tropsch synthesis to improve the catalytic performance and intensify the heat transfer within a fixed-bed reactor. FTS results showed that the CO conversion and C5+ selectivity increased whereas CH4 selectivity decreased, which could be attributed to the reduced metal–support interaction via modification of SiO2 on the surface of Al2O3@Al. The heat transfer coefficients of the Co/SAl2O3@Al–x were more than 30 times those of conventional Co/Al2O3 according to the laser flash measurement. The thermal conductive study showed that a homogeneous radial temperature gradient was maintained within the catalyst bed for Co/SAl2O3@Al-x even without using a heat diluter, indicating good thermal conductivity within the reactor. In addition, the temperature of the catalyst bed for Co/SAl2O3@Al-x was easier to reach a “steady state” compared to the reactor packed with traditional low thermal conductive Co/Al2O3, which could improve the operating flexibility of FTS.
研究领域:
化学工程
·
材料科学
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2016
·
IF 3.138
Gang Fang,Honggao Chen,Yunpeng Zhang,Anqing Chen
Fe 3 O 4 magnetic nanometer particles (MNPS) with a diameter of 30–40 nm and coated by ammoniated silicon dioxides were developed by sol–gel method. The X-ray diffraction (XRD) pattern indicates that the Fe 3 O 4 is wrapped in the amorphous SiO 2 , and the Fourier-transform infrared spectroscopy (FT-IR) analysis confirmed the NH 2 group had been successfully introduced onto the surface of Fe 3 O 4 @SiO 2 nanoparticles. The main factors related to the immobilization process of pectinase onto the magnetic support were optimized by multi-factor orthogonal experiments, and the recommended combination is that 3% glutaraldehyde (coupling agent), pH = 8.0, 50 °C, and cross-linking time 8 h. Scanning electron microscope (SEM) and FT-IR analyses confirmed that the pectinase had been immobilized onto the surface of the amino modified nanoparticles. The storage stability and reusability of the pectinase were enhanced by the immobilization that 64.4% of the total starting activity was retrieved after 7 recycling batches and only about 21.1% of the total activity was lost after 30-day storage. For the application of the immobilized pectinase, the optimal pH and temperature were 8.5 and 55 °C, respectively.
研究领域:
生物化学
·
纳米生物学
·
酶工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CARBOHYDRATE POLYMERS
·
2021
·
IF 9.381
Kaisheng Luo,Kaili Wu,Qingxi Hou,Wenwen Zhang,Tongbao Jiang,Xiaodi Wang,Xiuzhi Liu,Wei Liu
As the promising anode material of lithium-ion batteries (LIBs), SiO 2 has high theoretical capacity, but the volume expansion severely hinders its application. To address the challenge, inspired by the highly flexible spider-web architecture, the SiO 2 @carbonized polyaniline/carbonized 2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO)-oxidized cellulose nanofibrils (SiO 2 @cPANI/cTOCNFs) composite was designed, and fabricated via carbonizing the freeze-dried SiO 2 @PANI/TOCNFs. The resultant SiO 2 @cPANI/cTOCNFs composite exhibited unique spider-web-like nanostructures , providing a double-layer carbon network to protect SiO 2 anode material. The results showed that, the SiO 2 @cPANI/cTOCNFs composite as anode material of LIBs offered a reversible capacity of 1103 mAh g −1 at a current density of 0.1 A g −1 after 200 cycles, and gave a capacity of 302 mAh g −1 after 1000 cycles at a current density of 1 A g −1 , exhibiting excellent cycling stability. This study provides a strategy of spider-web-inspired cellulose nanofibrils networking polyaniline-encapsulated silica nanoparticles as anode material of LIBs.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
NANOTECHNOLOGY
·
2017
·Vol. 28
·期 41
·415301
·
IF 3.44
Sanyuan Hu,Heping Li,Zhen Su,Youwei Yan
This paper describes a near-field electrospinning technique combined with heat treatment process used to directly align parallel metal oxide and metal nitride fibers on silicon dioxide substrate. The effects of near-field electrospinning parameters (including collector-to-needle distance, applied voltage and the moving speed of the collector) on the morphology of the resulted fibers have been studied. Metallic salt-contained precursor fibers are individually aligned via near-field electrospinning of metallic salts and polymeric solution mixtures. After applying calcination process to these well aligned precursor fibers, patterning by metal oxide and metal nitride fibers such as ZnO, Ga2O3, TiO2, GaN and TiN is successfully obtained. The optical microscope images and the scanning electron microscopy show the presence of fiber patterns, whose crystalline structure is characterized by x-ray diffraction and Raman spectroscopy measurement. The results demonstrate the potential of this approach for assembling ceramic fibers into parallel arrays with controllable orientation and position.
研究领域:
材料科学
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ENERGY & FUELS
·
2020
·
IF 3.421
Huaikui Yuan,Zejun Zhang,Yuanzhu Mi,Fan Ye,Wangfu Liu,Jiazhe Kuan,Xia Jiang,Yue Luo
Relatively low cost, environmental friendly, and high-efficiency silicon dioxide/carbon sphere composite demulsifiers (SiO2@CS) were prepared via an in situ hydrothermal–calcination route. They were characterized by Fourier-transform infrared spectroscopy, field-emission scanning electron microscopy, energy-dispersive X-ray spectroscopy, and X-ray diffraction. The demulsifiers with different ratios of SiO2 and CS were systematically investigated. The effect of the temperature, standing time, and dosage of SiO2@CS on the demulsification performance was determined by the bottle test. The efficiency reached the highest value of 89.52% when the dosage, temperature, and standing time were 300 mg/L, 70 °C, and 150 min, respectively. Also, the pH value and salinity were inspected. It was encouraging to find that the demulsifier had good acid, alkali, and salt tolerance. Investigations of the wettability, dynamic interfacial tension, and self-assembly of the interfacial film and microexaminations were carried out to probe the possible mechanism. SiO2@CS exhibited good adsorption, flocculation, and coalescence abilities in the demulsification process. The current work is beneficial for the further understanding of the demulsification process and also provides a promising demulsifier to deal with the water-in-crude oil emulsion.
研究领域:
化学工程
·
材料科学
·
石油工程
✓ 已验证
产品关联
DOI
高影响因子
RENEWABLE ENERGY
·
2019
·
IF 5.439
Yi Zhang,Wen Tao,Kehan Wang,Dongxu Li
Microencapsulated phase change materials (MePCMs) were prepared in this study through sol-gel synthesis; these materials consisted of SiO 2 as shell and paraffin as core materials, and were subsequently incorporated in gypsum. Further, this study examined the thermal regulation performance of gypsum materials. Fourier transform infrared spectra confirmed the encapsulation of the paraffin with SiO 2 shell. Scanning electron microscope (SEM) results showed that the microcapsules obtained at a pH of 2.5 exhibit a regular spherical structure, excellent dispersibility , and compact surface structure. The MePCMs were found to reveal high thermal performance and encapsulation efficiency even in this synthetic condition. This is because the SiO 2 shell with its high compactness imparts high thermal stability and a good anti-osmosis performance to the microcapsules. Further, gypsum materials achieved high mechanical strength, compactness, thermal conductivity , and a good thermal regulation performance with the weight ratio of MePCMs at 10 wt%. The results showed that the MePCMs in the gypsum matrix exhibited advantageous application prospects for the thermal regulation in buildings.
研究领域:
建筑材料学
·
热能工程
✓ 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）