Journal of Advanced Dielectrics
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2026
·
IF 3.3
Hong Xiang,Jindong Liu,Fulei Tang,Ziang Liu,Jiaojiao Zheng,Peihong Ma,Meidan Que,Jian Wei,Yao Wang,Sai Liu
Photocatalytic CO 2 reduction technology is a promising new way to convert CO 2 into high value-added chemicals and fuels by sunlight. However, there are still some problems in the practical application of this technology, such as low yield, poor catalyst stability and excessive by-products. To solve these problems, TS-HF- x Pt series photocatalysts were successfully prepared by sol-gel method, HF etching process and photodeposition technology. The TS-HF-0.7Pt catalyst showed more excellent catalytic performance, and the methane yield reached 86.084 μmol·g -1 ·h -1 , which was 32.2 times that of TS-HF. The performance test shows that the surface plasmon resonance (SPR) effect of Pt significantly broadens the light absorption range, inhibits the recombination of photogenerated electron-hole pairs, reduces the charge transfer resistance, and improves the carrier utilization efficiency, thereby promoting the absorption of CO 2 . This reveals the great potential of Pt loading in improving the catalytic performance of TS-HF.
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高影响因子
Journal of Water Process Engineering
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2024
·
IF 6.3
Yalong Liu,Binjie Xin,Md All Amin Newton,Lifeng Li,Dan Huang
Oil pollution poses severe threats to both ecosystems and human health. This study utilized electrospinning and carbonization processes to fabricate a SiO2-TiO2-C nanofiber membrane (STCNFM) exhibiting photocatalytic self-cleaning properties designed explicitly for oil-water separation. These membranes possess nanoscale rough structures, endowing them with superoleophilicity (0°) and hydrophobicity (138°). Addressing the limitations associated with traditional ceramic membranes, particularly in terms of stability and reproducibility, cyclic experiments confirm the significant stability and reproducibility of this composite membrane, ensuring reliable long-term applications for continuous oil-water separation. Leveraging the synergistic effect of TiO2 and the carbon fiber substrate, STCNFMs-5 demonstrate exceptional separation performance and notable self-cleaning capabilities. Following a 2-h exposure to ultraviolet light, the membrane's flux is restored to its original level. STCNFMs offer a promising solution for efficiently separating oil-water mixtures and emulsions, holding potential importance in water treatment and resource recovery endeavors.
研究领域:
环境科学
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材料科学
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高影响因子
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
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2021
·Vol. 98
·期 1
·35-44
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IF 2.326
Yeung Ka-Wai,Chen Ling,Tang Chak-Yin,Choy Man-Tik,Akinwekomi Akeem Damilola,Law Wing-Cheung,Tsui Gary Chi-Pong
UV protection and coatings for plastics are important in many applications. The cladding of low microwave (MW) absorption composite coatings on high MW transparent plastic substrates is a challenge due to their disparate dielectric properties. Moreover, an uneven heat energy conversion within the composite creates an additional hurdle in producing a coating with good surface integrity. In this study, a protocol was developed to overcome these difficulties based on a hybrid approach. The adverse effect of temperature mismatch between the coating and substrate was reduced through a two-way susceptor-aided heating mechanism. Low MW absorbing sol–gel derived composite coatings consisting of silicon dioxide (SiO 2 ) and titanium dioxide (TiO 2 ) were successfully cladded on the surface of MW and visual light transparent polycarbonate to produce a clear protective coating with UV-resistance. Nanoindentation tests were conducted to assess the effectiveness of the proposed protocol. Significant enhancement in the surface elastic modulus and hardness were achieved.
Schematic of hybrid MW cladding of sol–gel derived SiO 2 /TiO 2 coating on polycarbonate. The heat energy transferred to the sample is a combination of (1) the heat generated through MW coupling of the SiO 2 /TiO 2 coating and (2) the heat transfer by conduction, convection, and radiation from the heated. This process promotes hydrolysis and condensation reactions, leading to fast densification of the coating. Moreover, the difficulty of processing low microwave absorbing and microwave transparent materials simultaneously has been overcome. As a result, a crack-free SiO 2 /TiO 2 coating with enhanced surface mechanical properties can be produced within a minute.
研究领域:
材料科学
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表面工程
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纳米技术
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光学涂层
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高分子材料加工
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高影响因子
MATERIALS AND MANUFACTURING PROCESSES
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2019
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IF 3.35
Tao Long,Yin Xu,Xiao-Jian Lv,Ming Li,Li Li,Lan-Ying Xu
A freestanding SiO2–TiO2 monolith with bicontinuous structure was prepared via a one pot sol-gel reaction. This monolith was fully characterized by using field emission scanning electron microscopy (FE-SEM), nitrogen adsorption and X-Ray diffraction (XRD). Synthesized SiO2–TiO2 monolith possesses great mechanical strength and interconnected macropores (throughpores, textural pores) on the micrometer scale as well as skeleton pores in nanoscale, and also possesses an anatase TiO2 crystalline structure. Photo-catalytic breakdown of aqueous methylene blue (MB) with UV light was chosen to evaluate photocatalytic efficacy of the SiO2–TiO2 catalyst. These photodegradation activities indicated that MB decomposed completely within 180 min and the SiO2-TiO2 catalyst was readily separated from the reaction system and easily regenerated. Moreover, the photocatalytic activity of the monolithic catalyst remained unchanged after four catalytic cycles and the morphology was still intact.
研究领域:
材料科学
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环境科学
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高影响因子
RSC Advances
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2013
·Vol. 3
·期 43
·20132-20137
·
IF 2.562
Zhijun Ma,Weibo Chen,Zhongliang Hu,Xuanzhao Pan,Guoping Dong,Shifeng Zhou,Mingying Peng,Yang Li,Chenxing Liao,Quanlan Xiao,Jianrong Qiu
TiO2-based micro/nano fibres with secondary hierarchical structure have been extensively studied concerning a wide range of applications. However, simultaneous optimization of the flexibility and thermal stability of these materials still remains a big challenge. In this investigation, the successful fabrication and characterization of TiO2–SiO2 composite micron fibers with both high flexibility and excellent thermal stability are reported. Electrospun flexible SiO2 fibers were used as the scaffold for supporting TiO2 nanostructures. Three distinguished layers of porous SiO2, anatase TiO2 nanoparticle and rutile TiO2 nanorods were muffled over the SiO2 fibers stepwise, forming a unique core@multi-shell architecture with hierarchical structure. Such elaborately designed core@multi-shell TiO2–SiO2 fibers present high flexibility, excellent thermal stability, large specific surface area and high porosity. Moreover, they are easy to be patterned into nonwoven film with hierarchically porous structure, which is promising for many applications. We evaluate the water purification performance of the TiO2–SiO2 nonwoven film with Rhodamine B as a model organic pollutant. Efficient removal of Rhodamine B from water was implemented via simple filtration under UV irradiation, and regeneration of the photocatalytic functionality of the film from organic contamination was conveniently realized merely through calcination.
研究领域:
材料科学
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环境科学
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2026
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IF 6.7
Xianyu Jiang,Xiang Zhang,Xingjian Zhou,Kai Zheng,Ruoyu Yang,Linbo Zhang
Developing microwave absorbers that simultaneously achieve high absorption efficiency and improved corrosion resistance remains challenging, particularly under corrosive environments containing chloride ions. Herein, we designed a multilayered FI@SiO 2 @TiO 2 composite using flake carbonyl iron (FI) as the core and a sol-gel strategy based on heterointerface engineering. Electrochemical measurements reveal that the corrosion rate of FI@SiO 2 @TiO 2 is nearly two orders of magnitude lower than that of pristine FI, reaching as low as 0.012 mm/year. This enhanced corrosion resistance mainly arises from the dense and chemically inert SiO 2 @TiO 2 dual-shell structure, which effectively suppresses the diffusion of corrosive species and inhibits electrochemical reactions at the metal surface. Electromagnetic characterization shows that FI@SiO 2 @TiO 2 achieves a minimum reflection loss (RL min ) of −65.01 dB at 4.18 GHz with a thickness of 2.23 mm, along with a maximum effective absorption bandwidth (EAB) of 4.53 GHz at only 1.36 mm. Such excellent performance predominantly originates from engineered heterogeneous interfaces, which induce abundant interfacial and dipolar polarization and markedly improve impedance matching of the flake iron core. Furthermore, electromagnetic simulations based on COMSOL and CST corroborate the positive role of the dual-shell architecture in optimizing impedance matching and reducing radar reflection. This work offers a practical strategy for fabricating dual-functional microwave absorbers capable of delivering high absorption efficiency together with sustained corrosion resistance.
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高影响因子
POWDER TECHNOLOGY
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2026
·
IF 5.5
Zheng-Hao Li,Li Zhang,Yu-Cui Yang,Xue-Yuan Guo,Ye Sheng,Bing Zhou
Titanium dioxide (TiO 2 ) is widely recognized as a high-performance papermaking filler, yet its extensive industrial application is constrained by its elevated cost. To address this challenge, we developed a sustainable and cost-effective carbonation method to prepare TiO 2 based composite fillers. Using opal as an inorganic support and exploiting the hydrolysis behavior of TiO 2 under CO 2 induction, opal/TiO 2 and SiO 2 /TiO 2 composite materials were successfully synthesized. This approach utilizes inexpensive and renewable carbon dioxide and naturally occurring siliceous minerals, significantly reducing production cost while enhancing the dispersibility and structural stability of TiO 2 . When applied as papermaking fillers, the composites effectively improve paper whiteness, hiding power, and mechanical properties, enabling reduced consumption of pure TiO 2 and promoting environmental and economic benefits. When applied as papermaking fillers, the silica derived from opal imparted a high paper whiteness of up to 94.3%. With increasing TiO 2 content, the opal/TiO 2 composites enhanced paper whiteness from 74.7% to 84.8%. Both composite fillers significantly improved the hiding power of paper, approaching that of pure TiO 2 at high filler loadings. In addition, enhanced filler retention (up to approximately 44.5%) and increased tearing strength (∼106 mN) were achieved, indicating favorable fiber–filler interactions and effective mechanical reinforcement. Beyond practical industrial relevance, this work establishes a novel strategy for fabricating composite materials and elucidates the underlying formation mechanism, offering valuable insights for the development of functional composite fillers. The proposed method demonstrates strong potential for large-scale industrial implementation and contributes to green manufacturing and carbon-utilization technologies.
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高影响因子
Journal of Materials Chemistry C
·
2013
·Vol. 2
·期 11
·1990-1994
·
IF 0
Yuxia Luo,Jianfei Zhang,Aihua Sun,Chengyi Chu,Shi Zhou,Jianjun Guo,Tao Chen,Gaojie Xu
A shell size adjustable core–shell nano building block of SiO2@TiO2 using high refractive index materials of TiO2 as shell to coat SiO2 colloidal NPs by one step approach was prepared. Corresponding colloidal suspension of SiO2@TiO2 photonic crystals in propylene carbonate showed a highly adjustable structure color change with the high-refractive index upon applying of electric fields.
研究领域:
材料科学
·
光学
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Journal of Coatings Technology and Research
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2021
·Vol. 18
·期 5
·1245-1259
·
IF 2.382
Zong Lijun,Wu Yaping,Li Xingeng,Jiang Bo
In this study, superhydrophobic photocatalytic fluorosilicone/SiO 2 –TiO 2 (FSi/SiO 2 –TiO 2 ) coatings were prepared. Evolutions of wettability and photocatalytic activities were explored by exposing a series of samples to UV irradiation and the outdoor environment. Their practical self-cleaning performances were also compared. The UV-irradiation test was carried out in an ultraviolet aging test chamber. Wetting properties, including water contact angles and sliding angles, were measured using a contact angle meter. A UV spectrophotometer was employed to detect and evaluate the coatings’ photocatalytic properties. Moreover, morphologies and surface roughness values were tested through field emission scanning electron microscope and optical profilometer, respectively. It is shown from experimental results that the coating series with more TiO 2 addition amounts transform from superhydrophobic to superhydrophilic in a shorter time. The coating with a more durable superhydrophobicity can maintain its initial wettability, while its photocatalytic property is superior to that of a hydrophobic coating. Mechanisms were put forward through analyzing the coating microstructures. It is considered that the superhydrophobic coating with a Cassie–Baxter surface structure shows a better photocatalysis. Besides, it has been confirmed that the practical self-cleaning performance of the prepared superhydrophobic photocatalytic FSi/5TiO 2 –32SiO 2 coating is better in comparison with superhydrophobic FSi/SiO 2 and photoinduced superhydrophilic FSi/5TiO 2 –28SiO 2 coatings.
研究领域:
材料科学
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表面化学
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环境科学
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高影响因子
DOKLADY CHEMISTRY
·
2026
·Vol. 521
·期 1
·1-11
·
IF 0.6
Wang Ke,Zuo Jiajun,Wang Zhihang,Wang Nong
Superhydrophobic materials have attracted widespread attention due to their unique surface structures and properties. However, in practical applications, superhydrophobic surfaces are often affected by external environmental factors, such as chemical corrosion and organic contamination, which can lead to structural damage and the loss of superhydrophobicity. In this work, SiO 2 @TiO 2 composite micro/nano particles were prepared by coating photocatalytically active TiO 2 nanoparticles onto the surface of SiO 2 . After modification with fluoroalkylsilane (FAS) and blending with urea formaldehyde and polyurethane, a SiO 2 @TiO 2 –FUP superhydrophobic coating with self-healing capability was fabricated. Specifically, the resulting SiO 2 @TiO 2 micro/nanostructure exhibits excellent photocatalytic performance for the degradation of organic pollutants. As a surface modifier, 1H,1H,2H,2H-perfluorooctyltriethoxysilane (FAS-13) provides low surface energy, which is essential for achieving superhydrophobicity. Urea–formaldehyde acts as a microcapsule shell that encapsulates the low-surface-energy compound FAS-13, enabling the coating to exhibit self-healing behaviour. Polyurethane serves as a binder that firmly anchors the hydrophobic particles and self-healing microcapsules to the substrate, thereby enhancing the mechanical durability and stability of the coating. After spray deposition, a stable superhydrophobic coating forms on the substrate surface. Even after immersion in acidic or alkaline solutions or exposure to water-flow impact, no solid particles detach from the surface, and the coating maintains its superhydrophobic properties. More importantly, the coating can restore its superhydrophobicity under UV irradiation after mechanical damage or organic contamination.
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高影响因子
WATER SCIENCE AND TECHNOLOGY
·
2016
·Vol. 74
·期 7
·1680-1688
·
IF 1.064
Xu Feigao,Tan Wencheng,Liu Heng,Li Dan,Li Yuexiang,Wang Min
Crack-free PDMS-SiO 2 -TiO 2 composite as photocatalyst was prepared for degrading dyes by using thin-film fixed bed reactor. The hydrophobic surface of the photocatalyst loaded with PDMS-SiO 2 -TiO 2 composite could be considered as an extractant for organic pollutants. The effect of different supports including pumice stone, medicinal stone, and fiberglass for photocatalytic efficiency were compared. Under the same condition, it was found that the photocatalytic degradation effect of dyes was best when PDMS-SiO 2 -TiO 2 composite was fixed on pumice stone rather than medicinal stone or fiberglass. Furthermore, when pumice stone was used as the support for PDMS-SiO 2 -TiO 2 composite, the photocatalytic degradation effect of dyes hardly decreased after five cycles.
研究领域:
环境化学
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材料科学
·
光催化
·
废水处理
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高影响因子
Polymer-Plastics Technology and Materials
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2019
·
IF 0
Xiaohai Bu,Yi Lu,Zewu Zhang,Feiyou Liu,Jinghan Liu,Xu Huai
In this study, novel polyurethane-based composites reinforced by hierarchical CNTs@SiO2-TiO2 were fabricated via in situ polymerization. Significant improvement of the composites in thermal stability was achieved by incorporating functionalized CNTs up to 2.0 wt%. Meanwhile, the tensile strength, strain-at-break, and Young’s modulus were greatly improved by increasing nanotube loading. The Abrasion losses could be significantly decreased to 30 mm3/1.61 km due to the addition of functionalized CNTs. Therefore, the introduction of nanosized hierarchical SiO2-TiO2 coated CNTs has a stimulative effect on the simultaneous mechanical reinforcement and abrasion resistance modification for polyurethane.
研究领域:
材料科学
·
纳米技术
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DOI
危险品化学品经营许可证（带存储）