Journal of Materials Chemistry C
·
2023
·Vol. 11
·期 39
·13343-13349
·
IF 6.4
Congcong Chi,Panpan Qu,Xin Xu,Jiarong Xian,Danjie Zhang,Jiahao Li,Jiangxue Ren,Xinggen Xu,Honglei Chen
The artificial design of nano-submicron structures to fabricate amorphous photonic crystals (APCs) is an effective means of obtaining non-iridescent structural color. APCs show great potential for applications in various fields, such as coating, textile coloring, displays, anti-counterfeiting, etc. However, a sharp fall in the structural color saturation can result due to incoherent scattering. In this paper, a type of light-absorbing material, SiO2@Ag, is prepared via a redox method. Non-iridescent structural color films with excellent color visibility and color saturation can be constructed through the layer-by-layer self-assembly of SiO2@Ag and SiO2 microspheres. Due to the inherent property of absorbing incoherent scattering light by the Ag nanoparticles, better structural color is generated without changing the originally ordered structure of the APC itself. Furthermore, no redshift or blueshift is caused by SiO2@Ag, which helps to maintain the color consistency well. Thus, excellent structure stability and color visibility are shown for the new type of APC film fabricated here, which will provide innovative ideas for the design and fabrication of non-iridescent structural color materials.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
Catalysis Science & Technology
·
2024
·
IF 4.4
Kai Cui,Jiaming Yang,Yuli Jing,Junwen Chen,Chen Zhao,Peng Wu,Xiaohong Li
Sustainability issues have led to a gradual market expansion for the 1,4-butanediol (BDO) monomer of the biodegradable plastics to replace conventional plastics. Maleic anhydride (MA) can be derived from the oxidation of bio-based furfural or fructose. Although the hydrogenation of MA can produce a series of products, including succinic anhydride (SA), γ-butyrolactone (GBL), BDO and tetrahydrofuran (THF), the one-pot deep hydrogenation of MA to BDO or THF under mild conditions has been rarely reported in the literature until now. Herein, we report the production of BDO from the one-pot deep hydrogenation of MA over a Cu–0.03Mo/SiO2 catalyst, achieving 100% MA conversion and 88.3% BDO yield. The Cu–0.03Mo/SiO2 catalyst also showed good long-term stability without obvious loss in activity or BDO selectivity during a 160 h time-on-stream test. Doping Mo to Cu/SiO2 catalysts in an optimal amount adjusted the distribution of Cu0/Cu+ species and modulated the interaction of Cu–SiO2 and surface acidity, so that the activation of hydrogen, MA and relevant intermediates can become balanced, in addition to the restriction of side-reactions. This study provides potential for the green synthesis of BDO with non-precious Cu-based catalysts.
研究领域:
化学工程
·
可持续发展
·
催化科学
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2017
·
IF 5.401
Long Wu,Wenmin Yin,Xuecai Tan,Pan Wang,Fan Ding,Huan Zhang,Biru Wang,Weiyun Zhang,Heyou Han
It is attractive but remains challenging to develop nanomaterials-based methods to realize the colorimetric detection of ultratrace biological analytes. In this work, an HAuCl 4 -H 2 O 2 system was developed for the visual detection of intracellular hydrogen peroxide (H 2 O 2 ) based on the Au-Pt/SiO 2 sensing platform. Owing to their excellent intrinsic peroxidase-like activity, Au-Pt/SiO 2 nanospheres were introduced to catalyze the decomposition of H 2 O 2 and then directly reduce HAuCl 4 into gold nanoparticles (Au NPs) for the naked-eye detection. The produced Au NPs behaved color variations from light purple to wine red as H 2 O 2 concentration increased. Under the optimal conditions, this strategy showed excellent sensitivity for H 2 O 2 with a detection limit of 0.1 nM by naked-eye readout and 0.1 pM by UV–vis spectrometer (S/N = 3), as well as acceptable selectivity for H 2 O 2 , which could meet the demand for the detection of H 2 O 2 in biological systems. The method was further validated by the determination of H 2 O 2 in HeLa cells with low cellular cytotoxicity. Thus, this strategy would provide simple and sensitive detection of H 2 O 2 in biological systems, revealing the potential application in clinical, biological and environmental researches.
研究领域:
生物分析化学
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纳米生物学
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医学检测
✓ 已验证
产品关联
DOI
高影响因子
FOOD CHEMISTRY
·
2020
·
IF 6.306
Li Wang,Shuang Shao,Million Paulos Madebo,Yuanyuan Hou,Yonghua Zheng,Peng Jin
Effect of nano-SiO 2 packing on postharvest quality and antioxidant capacity of two different loquat cultivars (white-flesh ‘Qingzhong’ and red-flesh ‘Dawuxing’) were determined. Results showed that nano-SiO 2 packing significantly inhibited internal browning, retarded the decline of total soluble solids, titratable acidity, ascorbic acid content and extractable juice in both cultivars. Decay index of nano-SiO 2 packing in ‘Dawuxing’ and ‘Qingzhong’ was 53.25% and 42.84% lower than control after the day 12, respectively. Meanwhile, nano-SiO 2 packing enhanced the contents of individual phenolic compounds and soluble sugar compounds, induced higher superoxide dismutase and catalase activities, which contributed to improving 1,1-diphenyl-2-picrylhydrazyl and hydroxyl radical scavenging capacity. Furthermore, the contents of total soluble solids, ascorbic acid and soluble sugar were higher in ‘Qingzhong’ than those in ‘Dawuxing’, which dedicated to better quality. These results indicated that nano-SiO 2 packing was a promising approach in inhibiting decay, maintaining quality and expanding shelf life of loquats.
研究领域:
植物学
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食品科学
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园艺学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Wei Pan,Chao Song,Li Li,Lina Xu,Peiying Zhang,Juqun Xi,Lei Fan,Jie Han,Rong Guo
In recent years, hydrogel materials with suitable energy dissipation mechanisms and excellent mechanical properties have attracted much attention in tissue engineering due to their ability to mimic the natural cartilage structure. However, in cartilage tissue's regeneration and repair process, hydrogel materials should also possess satisfactory lubrication properties and biocompatibility. Therefore, preparing biocompatible low friction, high toughness hydrogels remain a challenge. In this paper, a new strategy is proposed to use gelatin, acrylamide (AM), lauryl methacrylate (LMA) and SiO 2 to construct hydrophobically associated hydrogels, where gelatin was used as an emulsifier and SiO 2 was used to a nano-enhanced filler. Then the Hofmeister effect enhanced SiO 2 /gelatin-based hydrophobically associated hydrogels were prepared by one-step immersion in ammonium sulfate solution. The results showed that the strong “salting out” effect of ammonium sulfate solution on gelatin led to further enhancement of the hydrophobic interactions between gelatin molecular chains, which significantly improved the mechanical properties and lubrication ability of the hydrogels. Furthermore, Calcein AM-PI fluorescent staining and haemolysis assays showed that the hydrogel had low cytotoxicity and good haemocompatibility, and ELISA and scratch assays confirmed the positive regulatory effect of the hydrogel on normal cell growth. The Hofmeister effect-enhanced SiO 2 /gelatin-based hydrophobically associated hydrogels have potential applications in articular cartilage repair.
研究领域:
生物材料学
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组织工程学
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医学材料
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF POROUS MATERIALS
·
2023
·Vol. 30
·期 5
·1753-1761
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IF 2.6
Zhao Wenpu,Ji Yuecheng,Pang Yifan,Li Xiaolei,Ji Huiming
Al 2 O 3 -SiO 2 aerogel (ASA) was prepared by convenient ambient pressure drying using inexpensive AlCl 3 ·H 2 O as precursor, and silicon was deposited during the aging of aluminum gel. To explore the influence of Chloride ion on the property of ASA, ion exchange technology was used to remove the Chloride ion in the aluminum sol. ASA exhibits a low thermal conductivity of 0.029 W m −1 K −1 at room temperature, and the specific surface area of Cl-free ASA after heat-treated at 1200 °C is 95.2 m 2 /g, which is higher than that of the chlorine-containing aerogel (11.4 m 2 /g), showing enhanced thermal stability of ASA. Analysis of XRD and XPS indicate that the removal of chloride ions makes it more difficult for ASA to establish Al–O–Si groups during the aging process, so the γ-Al 2 O 3 and cristobalite phase do not transform to mullite phase at 1200 °C. Due to the better thermal stability of ASA, it has great potential for high-temperature applications in the fields of insulation, thermal protection materials, and building external wall thermal insulation.
研究领域:
材料科学
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纳米技术
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热工工程
✓ 已验证
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2020
·Vol. 137
·期 37
·49103
·
IF 2.52
Beirong Ye,Chao Jia,Ziwei Li,Lei Li,Qiang Zhao,Jinshu Wang,Hui Wu
With the ever frequent of industrial organic solvent emissions and oil spillages, the development of high efficiency oil/water separation materials has attracted extensive attention. Here, PLA-based nanofiber membranes modified with metal oxides (SiO 2 , TiO 2 , Al 2 O 3 , and CeO 2 ) are fabricated through blow spinning the mixed solution of polylactic acid (PLA) and metal oxide nanoparticles (NPs). Results shows that the addition of SiO 2 NPs significantly increases the hydrophobicity of the membranes, while maintaining the excellent superoleophilicity. The PLA/SiO 2 nanofiber membranes demonstrate a higher separation performance than pure PLA, PLA/TiO 2 , PLA/Al 2 O 3 , and PLA/CeO 2 nanofiber membranes with high separation efficiency (~100%) and permeation flux (17,800 L m −2 h −1 for n-heptane), as well as prominent oil adsorption capacity (19.9 g/g for n-hexane). The successful fabrication of metal oxides modified PLA nanofiber membranes with high separation and adsorption ability, and excellent durability hold great application potential in the field of oily wastewater treatment.
研究领域:
材料科学
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环境科学
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纳米技术
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2023
·
IF 5.2
Huilian Zhou,Siming Yan,Yi He,Yi Fan,Liping Yan,Xinyu Cheng,Zhiyuan Li,Jiamin Zhong,Jinxue Song
The two-step method limits the large-scale production of superhydrophobic coatings, while low hardness limits the practical application of superhydrophobic coatings. In this study, silane-modified SiO 2 nanomaterials (SH-SiO 2 ) were prepared first and then superhydrophobic coatings were prepared by one-step electrodeposition by adding modified materials. In addition, the nonwetting properties, microhardness , mechanical stability and corrosion resistance of pure Ni coatings, Ni/SiO 2 coatings, and Ni/SH-SiO 2 coatings were compared. The contact angle test shows that the water contact angle (WCA) of the Ni/SH-SiO 2 coating can reach 153.858°. The microhardness test shows that the addition of SH-SiO 2 can effectively improve the microhardness of the coating and the microhardness of the Ni/SH-SiO 2 coating is increased by 76.14% relative to the Ni coating. When the abrasion length reaches 1000 mm, the change of the water contact angle of the Ni/SH-SiO 2 coating is kept within 5%, which helps to further promote the practical application of superhydrophobic coatings. Electrochemical impedance spectroscopy tests were used to comprehensively evaluate the corrosion resistance of the coating. The results showed that in a 3.5 wt% NaCl solution, the impedance of the Ni/SH-SiO 2 coating is an order of magnitude increase over the other two coatings. Overall, the Ni/SH-SiO 2 coatings have excellent corrosion resistance, good hardness and hydrophobicity , and their simple preparation method has positive implications for the large-scale production of superhydrophobic coatings.
研究领域:
材料科学
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腐蚀与防护
·
表面工程
✓ 已验证
产品关联
DOI
高影响因子
Transactions of the Indian Ceramic Society
·
2022
·
IF 2.355
Qiang Liu,Juan Wang,Wensheng Liu,Lingjiao Zhan,Shaoheng Peng,Shuwei Yao,Yunzhu Ma
In order to optimize the phase composition and grain size of alumina fibers, 0-3 wt% SiO2 were induced to prepare alumina fibers using sol-gel method with the reaction of aluminium powder, formic acid, acetic acid, nitric acid and SiO2 sol. Effects of low SiO2 content on the phase transition and microstructure of alumina fibers were investigated. X-ray diffraction analysis and differential scanning calorimetry results showed that the addition of silica delayed the formation of α-Al2O3, and the phase transformation path of alumina was changed from amorphous alumina → γ-Al2O3 → α-Al2O3 to amorphous alumina → γ-Al2O3 → θ-Al2O3 → α-Al2O3. Moreover, scanning electron microscopy and transmission electron microscopy results confirmed that the addition of SiO2 reduced the grain size and was beneficial for the dense structure. Fine-grained dense alumina fibers composed of α-Al2O3 phase and transitional alumina phase were obtained by adding 1 wt% and 3 wt% silica after sintering at 1200°C for 1 h.
研究领域:
材料科学
·
陶瓷学
✓ 已验证
DOI
高影响因子
JOURNAL OF RARE EARTHS
·
2017
·
IF 2.429
Hong DING,Yanling ZHAO,Qianlin DUAN,Junwen WANG,Kan ZHANG,Guangyue DING,Xianmei XIE,Chuanmin DING
Fe 3 O 4 @SiO 2 magnetic nanoparticles functionalized with mesoporous cerium oxide (Fe 3 O 4 @SiO 2 @ m CeO 2 ) was fabricated as a novel adsorbent to remove phosphate from water. The prepared adsorbent was characterized by X-ray diffractometry (XRD), transmission electron microscopy (TEM), nitrogen adsorption-desorption and vibrating sample magnetometry (VSM), and its phosphate removal performance was investigated through the batch adsorption studies. Characterization results confirmed that mesoporous cerium oxide was successfully assembled on the surface of Fe 3 O 4 @SiO 2 nanoparticles, and the synthesized adsorbent possessed a typical core-shell structure with a BET surface area of 195 m 2 /g, accessible mesopores of 2.6 nm, and the saturation magnetization of 21.11 emu/g. The newly developed adsorbent had an excellent performance in adsorbing phosphate, and its maximum adsorption capacity calculated from the Langmuir model was 64.07 mg/g. The adsorption was fast, and the kinetic data could be best fitted with the pseudo-second-order kinetic model. The phosphate removal decreased with the increase of solution pH (2 to 10), while the higher ionic strength slightly promoted the phosphate adsorption. The presence of Cl − and SO 4 2− could enhance the adsorption of phosphate whereas HCO 3 − had interfering effect on the phosphate adsorption. The adsorption mechanism was studied by analyzing Zeta potential and FTIR spectroscopy, and the results indicated that the replacement of the surface hydroxyl groups by phosphate ions with the formation of inner-sphere complex played a key role in the phosphate adsorption. The spent adsorbent could be quickly separated from aqueous solution with the assistance of the external magnetic field, and the adsorbed phosphate could be effectively desorbed using a 1 mol/L NaOH solution.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Nano Materials Science
·
2024
·
IF 12.6
You-Yong Wang,Xiang-Qian Wang,Bei-Zhou Zhang,Shuai Zhai,Hao Li,Yuan-Qing Li,Wei-Bin Zhu,Shao-Yun Fu
Development of lightweight and strong structural material using fast-growing poplar wood is promising for green and sustainable engineering. Herein, the overall performances of fast-growing natural poplar wood (NPW) are significantly enhanced via delignification, in situ growth of SiO 2 followed by densification. The SiO 2 /compressed-delignified-wood (SiO 2 /CDW) nanocomposite obtained exhibits outstanding mechanical properties including a bending strength of 395.6 MPa, a tensile strength of 253.4 MPa, and a toughness of 7.1 MJ/m 3 , which is improved by 1548 %, 240 % and 590 %, respectively compared with NPW. In addition, the ignition time and burning time of SiO 2 /CDW nanocomposite are prolonged by 700 % and 112 % compared to those of NPW. Moreover, the specific wear rate of SiO 2 /CDW is 18 × 10 −6 mm 3 /Nm, which is 72.6 % lower than that of NPW. Moreover, the spring-back ratios of SiO 2 /CDW in 95 % and in water are 45.2 % and 66.7 %, which are lower than those of CDW (64.6 % and 92.4 %). The SiO 2 /CDW nanocomposite with enhanced mechanical, flame/water retardant and wear performances are promising to meet the needs of modern engineering as green and sustainable materials.
研究领域:
材料科学
·
可持续工程
·
纳米技术
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Xuan Wang,Hao Ding,Guocheng Lv,Run Zhou,Ruixin Ma,Xifeng Hou,Jianmeng Zhang,Wei Li
Generally, superhydrophilic self-cleaning coatings are prepared from semiconductors with photocatalytic properties. Organic pollutants attached to the coating surface can be degraded by its photocatalytic performance realizing a self-cleaning goal. Herein, SiO 2 –TiO 2 composite particles were fabricated by the hydrolysis and precipitation of TiOSO 4 , and SiO 2 microspheres were chosen as carriers, which are inexpensive and environmentally friendly. Then, superhydrophilic self-cleaning SiO 2 –TiO 2 coatings were fabricated by spraying the composites on the surfaces of substrates. The morphology, structure and self-cleaning performance of the SiO 2 –TiO 2 coating were characterized and tested. The results revealed that nano-TiO 2 was loaded on the surfaces of SiO 2 microspheres uniformly forming a hierarchical micro/nanostructure. The SiO 2 –TiO 2 composite particles exhibited excellent photocatalytic degradation performance, and the degradation rate of methyl orange (10 ppm) was more than 98% under UV irradiation for 40 min. Furthermore, the coating prepared with the SiO 2 –TiO 2 composite particles exhibited superhydrophilicity. A water droplet spreads completely on the coating surface in 0.35 s, and the contact angle reaches 0°. In addition, rhodamine B (RhB) and methylene blue (MB) on the coating surface can be degraded efficiently under sunlight irradiation. The SiO 2 –TiO 2 composite particles can be sprayed directly on the surfaces of concrete, brick, wood, and glass slides. Therefore, the particles showed good adaptability to different substrates. The superhydrophilic property was due to the hydrophilicity of SiO 2 and TiO 2 , the hierarchical micro/nanostructure of the SiO 2 –TiO 2 composites, and the photoinduced superhydrophilicity of TiO 2 . The above experimental results show that the as-prepared superhydrophilic self-cleaning SiO 2 –TiO 2 coating has a large application potential.
研究领域:
材料科学
·
环境科学
·
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）