SEPARATION SCIENCE AND TECHNOLOGY
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2018
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IF 1.2
Bo Ge,Lu Han,Bo Gao,Tingxiao Zhang,Xiuling Li,Xiaotao Zhu,Xipeng Pu,Wenzhi Li
A mesoporous SiO2-TiO2-x composite without any modification was obtained to separate oil-in-water and water-in-oil emulsions solely by gravity. To simulate the actual pollution treatment process in sewage treatment plants, adsorption and degradation properties were studied after the initial emulsion separation. The research result indicates that the reported mesoporous SiO2 can be employed as an excellent absorbent and catalyst carrier. After light irradiating for 120 min, the degradation efficiency of SiO2-TiO2-4 for Rhodamine B, methyl orange, methylene blue, and ciprofloxacin hydrochloride reaches 99.3%, 91.5%, 98.7%, and 96.2%, respectively.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
ACS Applied Nano Materials
·
2021
·
IF 5.097
Yingying Yu,Sixiang Zhao,Boyu Zhang,Silin Han,Ming Li,Liancheng Zhao,Liming Gao
Circularly polarized light (CPL) detection is important in the field of advanced optoelectronics. Traditionally, CPL detection with optical elements is limited by the challenge of integration. Chiral materials have been investigated for direct CPL detection without complex optical elements. However, chiral structures such as the CPL absorption layer need further investigation owing to the low anisotropy factor (gph). Herein, we demonstrate a composite structure combining chiral cellulose nanocrystals (CNCs) and TiO2 nanotube arrays (TNAs) for CPL detection. This CNC–TNA structure is fabricated by evaporation-induced self-assembly of CNCs on the top of electrochemically anodized TNAs. The excellent ability to distinguish between left-handed CPL (LCPL) and right-handed CPL (RCPL) is achieved using CNC–TNAs as photoelectrodes. Benefitting from the chiral nematic phase of CNCs, which selectively reflect LCPL and transmit RCPL, gph of CNC–TNA photoelectrodes reaches 0.33, indicating a highly effective distinguishability to CPL. CNC–TNA photoelectrodes realize the CPL detection with high gph (0.33), fast response (0.8 s), and cycling stability under time-varying CPL illumination. In addition, they can track the phase difference of elliptically polarized light due to the sensitivity to polarization states. The CNC–TNA composite structure opens up a potential approach for CPL detection.
研究领域:
材料科学
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光学
·
纳米技术
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DOI
高影响因子
Catalysts
·
2022
·Vol. 12
·期 5
·571
·
IF 4.501
Yuxin Liu,Jing Ye,Fanpeng Kong,Chunyu Du,Pengjian Zuo,Lei Du,Geping Yin
Proton exchange membrane (PEM) fuel cells using Pt-based materials as electrocatalysts have achieved a decent performance, represented by the launched Toyota Mirai vehicle. The ideal PEM fuel cells consume stored pure hydrogen and air. However, SO2, as a primary air contaminant, may be fed along with air at the cathode, leading to Pt site deactivation. Therefore, it is important to improve the SO2tolerance of catalysts for the stability of the oxygen reduction reaction (ORR). In this work, we develop the Pt/C-TiO2catalyst against SO2poisoning during ORR. Impressively, the hybrid Pt/C-TiO2catalyst with 20 mass % TiO2shows the best ORR and anti-toxic performance: the kinetic current density of ORR is 20.5% higher and the degradation rate after poisoning is 50% lower than Pt/C. The interaction between Pt and TiO2as well as the abundant hydroxyl groups on the surface of TiO2are both revealed to account for the accelerated removal of poisonous SO2on Pt surfaces.
研究领域:
材料科学
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电化学
·
能源科学
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DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2020
·Vol. 44
·期 47
·20751-20758
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IF 3.288
Ying Gao,Xiu Wang,Xiang Li,Hongqi Dai
In this study, cellulose acetate (CA)/titanium dioxide (TiO2) composite films with different loadings (4 wt%–12 wt%) were prepared by the combination of ultrasonic dispersion, stirring and hot-pressing processes. Some properties of the films were characterized by techniques including SEM, XRD, FTIR spectroscopy, WCA analysis, tensile strength measurement, TGA, DSC and antibacterial analysis. The morphology and Ti element analysis mapping of the composite films were investigated through the methods of SEM. The results showed that the TiO2 nanoparticles were successfully and uniformly connected with cellulose acetate. With the increase of TiO2 content, the hydrophilic property of the films was enhanced. Films with different contents also maintained thermal stability and mechanical properties. The CA/TiO2 film with 12 wt% loading exhibited good antibacterial activity against Escherichia coli with 55.6% sterilization in 12 h. Therefore, the CA/TiO2 composite films can be applied as antibacterial films prepared by a simple method.
研究领域:
材料科学
·
生物学
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DOI
高影响因子
JOURNAL OF ELECTRONIC MATERIALS
·
2016
·Vol. 46
·期 2
·999-1004
·
IF 1.491
Huang Zhengfeng,Cheng Xudong,Dong Peimei,Zhang Xiwen
To mitigate the greenhouse effect, many studies have been carried out to improve the CO 2 conversion efficiency of TiO 2 . Modification of TiO 2 has been intensively investigated, but the influence of an electric field on photoreduction by this material remains largely unknown. Accordingly, in this study, we explored the effect of an electric field on the photoreduction process using a porous TiO 2 -Ti material. The results indicated that the CO yield improved 85-fold (equivalent to 4772 μ mol/g h) when a 30-kV voltage was applied during the reduction process. To make the electric field effect fully functional, we also explored the effect of water on the photoreduction process, finding that TiO 2 showed the highest conversion rate when the humidity was controlled at 50% relative humidity (RH).
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
COLLOIDS AND SURFACES B-BIOINTERFACES
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2016
·
IF 3.902
Fei Ge,Mengfei Yu,Cuixia Yu,Jun Lin,Wenjian Weng,Kui Cheng,Huiming Wang
In the process of biomaterials mediated bone regeneration, rhBMP-2 delivery at efficient dose in sustained kinetics is crucial for promoting cell osteogenic differentiation. Meanwhile, surface morphology of the biomaterials could regulate cellular responses as well as strengthen the rhBMP-2 interaction with cells for better bone induction. Herein, TiO 2 nanorod films with varied mesoporous bioactive glass (MBG) incorporation amount were designed to strengthen the efficacy of rhBMP-2, basing on optimized loading/release behaviors and surface nanostructure cooperatively. The MBG incorporation improved rhBMP-2 loading amount and regulated its release behavior. Consequently, the osteogenic differentiation of bone marrow-derived mesenchymal stem cells (BMSCs) on the incorporated films was extremely enhanced, and the incorporated nanorod film with 200 nm MBG thickness exhibited the best osteoinduction effect. However, MBG film and the incorporated nanorod film had the same loading amount of rhBMP-2, the latter showed a much higher expression of 7-day osteogenic differentiation index than the former, which could be attributed to the synergistic effect of optimized rhBMP-2 release behavior and surface morphology. The MBG incorporated TiO 2 nanorod films here presents a promising strategy for enhancing osteoinduction through optimized rhBMP-2 release behavior.
研究领域:
生物材料
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组织工程
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生物医学工程
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DOI
PubMed
高影响因子
Journal of Energy Storage
·
2025
·
IF 9.8
Yinghui Liu,Xiaoxuan Zhang,Jingrui Rong,De Li,Shujun Lv,Xuejiao Sun
Aqueous zinc ion batteries (AZIBs) are garnering attention as a promising energy storage technology, boasting high energy density, low cost and high safety. Nevertheless, Zn dendrite growth and side reaction seriously affect the AZIBs cycle stability. In this paper, the interlayer separator design strategy is innovatively proposed, and a titanium dioxide fiber membrane (TiO 2 /CNF) with three-dimensional network structure is fabricated using the electrostatic spinning technique, which is used as an interlayer with filter paper to form a new type separator. The TiO 2 /CNF interlayer can suppress the side reaction and promote the uniform Zn deposition. As a result, the Zn||Zn symmetric cell with a current density of 2 mA cm −2 can maintain stable cycling for 650 h. Excitingly, the Zn||CVO full cell equipped with the TiO 2 /CNF interlayer separator achieves remarkably improved, and shows long-term stability of 200 cycles with 1.0 A g −1 current density.
研究领域:
材料科学
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电化学
·
能源存储技术
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2024
·
IF 4.1
Wei Lei,Yu-gao Wang,Wei-jia Jiang,Jian-xin Liu,Mohannad Mayyas,Jun Shen,Xian-yong Wei
Quantum dots exhibit unique photoconversion properties, making them attractive candidates for enhancing photocatalytic reactions. Nonetheless, it is rarely reported that sulfur quantum dot (SQD) sensitized TiO 2 . Furthermore, the lack of efficient synthetic approaches for high-throughput production of SQD remains a challenge in practical applications. Here, the sublimated sulfur powder was applied to achieve rapid and efficient synthesis of SQD by a two-step oxidation procedure. The method could avoid dialysis and freeze-drying processes while achieving a remarkable mass yield of up to 25% based on sulfur content. Product characterization suggested that the sulfonyl groups of SQD assisted in the attachment of SQD on TiO 2 surface to form SQD-TiO 2 .The performance of SQD-TiO 2 for degrading methyl orange in contaminated wastewater was assessed under simulated sunlight. The photocatalytic performance of SQD-TiO 2 was significantly higher than that of pristine TiO 2 , suggesting excellent simulated sunlight photoconversion synergy between titanium dioxide as a photocatalyst and SQD as photosensitizers. The successful integration of SQD onto TiO 2 would expend the effective utilization approaches of SQD in the field of photosensitizer.
研究领域:
材料科学
·
环境科学
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产品关联
DOI
高影响因子
METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE
·
2024
·
IF 2.4
Chen Mao,Chen Buxin,Jiang Yang,Zheng Kui,Hu Meilong,Qiu Shuxing
Ti(C,N) is commonly observed in vanadium titanomagnetite blast furnaces and greatly affects the stable and smooth operation of the smelting processes. To get fundamental insight into Ti(C, N) formation, systematic experiments were conducted to investigate the effects of the composition of slags, temperatures, reaction time and reaction atmosphere on the formation of Ti(C,N) from TiO 2 -containing slags. The results show that TiN and TiC contents increase with TiO 2 content increases. When TiO 2 is larger than 30 wt pct, TiN contents increase dramatically. Control of basicity, MgO and Al 2 O 3 concentrations in the slag could help to reduce Ti(C,N) contents in slags. TiN and Ti(C,N) contents increase dramatically with the extension of time. TiN is more easily formed at high temperatures, and TiN contents increase with the increase of temperature. With the increase of N 2 contents, TiC contents are relatively stable, and TiN and Ti(C,N) contents increase almost linearly. H 2 would greatly promote the formation of TiC. This paper can provide a theoretical basis for minimizing the formation of Ti(C,N) in different blast furnace conditions.
研究领域:
冶金学
·
材料科学
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产品关联
DOI
高影响因子
ACS Applied Polymer Materials
·
2026
·
IF 5.2
Zhenyu Guo,Qian Zhai,Weiqiang Song,Senlong Yu,Man Liu,Hengxue Xiang,Meifang Zhu
Superhydrophobicity of different materials has become a hot research topic. However, it is still challenging to realize a hydrophobic-to-superhydrophobic transition quickly by a simple process. This is mainly limited by how the surface roughness and stability of the material are constructed. Herein, we successfully prepare a superhydrophobic surface of the polylactic acid (PLA) sheet which is fabricated by an innovative and convenient method of pregrinding and postcoating. The result indicates that PLA coating materials with a multiscale hierarchical micronanostructure exhibit excellent superhydrophobic and self-cleaning properties. PLA coating in a TiO2 nanoparticle suspension without pregrinding resulted in the formation of a four-level hierarchical structure with a water contact angle (WCA) between 120 and 130°. PLA coating sheets with pregrinding in the same suspension possess the resulting multiscale hierarchical structure with a WCA more than 150°, showing superhydrophobicity. This study provides a basis for the design of self-cleaning materials and promotes the wider application of PLA-based superhydrophobic materials.
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DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2026
·
IF 6.6
Xiang Hui,Jiajun Zhang,Xi Zhang,Yifan Li,Fengqin Guo,Yan Cao,Huiquan Li,Liguo Wang
MOF-derived catalyst of Bi 1 -TiO 2 was designed for the carbonylation of amines. • Bi 1 -TiO 2 achieved a high space yield of 833 mmol·g cat -1 ·h −1 with 99% selectivity. • Atomic Bi promoted L-acid density to 256 μmol/g cat that benefits carbonylation. • Intermediate DPU activated on Bi 3+ with selective anti-bonding orbits population. The synthesis of N-substituted carbamates through the carbonylation of amines with alkyl carbamates represents a green and promising route, yet it is hindered by insufficient catalytic efficiency and a lack of mechanistic understanding. In this work, a single-atom Bi-doped TiO 2 (Bi 1 -TiO 2 ) catalyst was synthesized using MIL-125(Ti) as the precursor for the carbonylation of amines with ethyl carbamate (EC). The optimized 5% Bi 1 -TiO 2 catalyst demonstrated exceptional performance, achieving a high space–time yield of ethyl propyl carbamate (EPC) at 833 mmol·g cat ⁻ 1 ·h⁻ 1 with 99% selectivity, surpassing most reported catalysts. Mechanistic studies revealed that the 5% Bi 1 -doped TiO 2 possessed a high density of Lewis acid sites of 256 μmol/g cat . Dipropylurea (DPU) was identified as the key reaction intermediate. Both DPU and ethanol were preferentially activated on the Lewis acidic Bi δ+ sites. Further evidence indicated that electrons were populated into the anti-bonding orbitals of DPU from Bi, leading to significant activation of the N-(C=O) bond. This activation dramatically enhanced the carbonylation process by facilitating the alcoholysis of DPU. Additionally, the catalyst exhibited excellent stability for over 250 h and substrate universality across a range of amines for the synthesis of various N-substituted carbamates. Download: Download high-res image (185KB) Download: Download full-size image
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DOI
高影响因子
Scientific Reports
·
2026
·
IF 4.9
Wang Jinghan,Hou Peng,Yao Qingwei,Fu Shuang,Chao Liyuan,Sui Huimin,Han Lu,Wang Jiafeng,Wang Guowei,Zhang Hongguang
Surface-enhanced Raman scattering (SERS) technology has emerged as a powerful analytical tool for trace-level environmental pollutant detection, with its performance critically dependent on the physicochemical properties of substrate materials. While noble metal substrates (e.g., Au/Ag) demonstrate superior SERS enhancement through surface plasmon resonance (SPR), their practical deployment is hampered by inherent limitations including high material costs and susceptibility to oxidation-induced degradation. Herein, we report the rational design of Ag 2 O/TiO 2 composite substrates via a facile wet-chemical precipitation method, wherein Ag 2 O nanoparticles are uniformly decorated onto pre-synthesized TiO 2 nanospheres. Upon application in crystal violet (CV) detection, the optimized Ag 2 O/TiO 2 composite substrate exhibits remarkable SERS performance with an enhancement factor (EF) of 6.7 × 10 6 and an ultra-low detection limit (LOD) of 1.0 nM (1.0 × 10⁻ 9 M). Systematic investigations reveal that the Ag 2 O modification induces photogenerated electron accumulation on the TiO 2 surface, promoting photoinduced charge transfer (PICT) between the substrate and adsorbed CV molecules. This work not only presents a cost-effective and stable SERS platform for environmental contaminant monitoring but also provides mechanistic insights into the rational engineering of semiconductor-based SERS substrates with enhanced sensitivity and durability.
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产品关联
DOI
PubMed
高影响因子
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