Nano-Micro Letters
·
2019
·Vol. 11
·期 1
·1-16
·
IF 9.043
Xu Tingting,Liu Xuan,Wang Shulan,Li Li
PbTiO 3 /TiO 2 @carbon (PTC) composites with trimodal pore distribution were synthesized by a dual-template method. Localized quasi-1D nanoneedle morphology was formed that can promote charge separation.
The as-prepared PTC nanocomposites with optimal mass ratio exhibited excellent photocatalytic and photoelectrochemical performances.
研究领域:
材料科学
·
环境科学
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DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2019
·
IF 4.175
Longkai Pan,Hui Mei,Hongxia Liu,Haixi Pan,Xing Zhao,Zhipeng Jin,Gangqiang Zhu
Loading co-catalyst is one of the essential ways to strengthen the performance of photocatalyst . Here, a novel non-precious metal co-catalyst Ti 2 C/TiO 2 was successfully synthesized and Zn 0.5 Cd 0.5 S nanoparticle grown on the surface of Ti 2 C/TiO 2 equably. In our work, 0.01 g photocatalysts were used in photocatalytic activity measurement. Zn 0.5 Cd 0.5 S/Ti 2 C/TiO 2 composite (2 wt% Ti 2 C/TiO 2 ) exhibited the highest photocatalytic activity and the H 2 yield is 32.57 mmol/g −1 /h −1 under visible light irradiation. The photoelectrochemical results reveal that Ti 2 C/TiO 2 could improve the separation of the photo-induced carriers in Zn 0.5 Cd 0.5 S/Ti 2 C/TiO 2 heterojunction . And DFT calculations demonstrate that the Gibbs free energy of oxygen-terminated Ti 2 C and TiO 2 are much lower than that of Zn 0.5 Cd 0.5 S. Therefore, the Ti 2 C/TiO 2 has an active impact on improving the H 2 production of Zn 0.5 Cd 0.5 S. This study provides a new way to explore the application of inexpensive co-catalysts on a large scale.
研究领域:
材料科学
·
化学
·
纳米技术
·
能源科学
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DOI
高影响因子
NANO
·
2025
·
IF 1.1
Ye Feng,Lei Zhang,Shen Chen,Baoe Li,Xiaoyan Zhao,Chunyong Liang,Hongshui Wang,Donghui Wang
Titanium (Ti) is one of the most widely used implant materials; however, postoperative failures still frequently occur due to its poor osseointegration and limited antibacterial performance. The key to accelerating bone healing and improving implantation success lies in modulating immune responses through the regulation of immune cell behaviors. In this work, simvastatin, which is reported to have the immune regulation function was loaded into photothermal TiO 2 nanotubes (diameter 60–65 nm) formed on the Ti surface and subsequently covered with an intelligent thermosensitive chitosan hydrogel (phase transition temperature 38.95 °C) to construct a light-controlled drug release system (SCTH@rNT). The release of simvastatin from TiO 2 nanotubes was precisely regulated under near-infrared (NIR) irradiation. In vitro, the SCTH@rNT + NIR system exhibited remarkable antibacterial activity, reducing the viable colonies of S . aureus and E. coli by 98.6% and 97.4%, respectively, and significantly promoting osteogenic differentiation, with alkaline phosphatase (ALP) activity 1.8-fold higher than that of the control on day 14. The controlled release further enabled immunomodulation by upregulating Interleukin-10 (IL-10) expression 2.3-fold and down-regulating Tumor Necrosis Factor-alpha (TNF-α) by 48%, thereby alleviating inflammation. In vivo, the system reduced inflammatory cell infiltration by 62.7% and markedly enhanced new bone formation. Overall, this light-controlled drug delivery platform effectively creates a favorable immune microenvironment by dynamically regulating the macrophages behaviors, showing great potential for clinical translation in improving the integration and longevity of Ti-based implants.
研究领域:
生物医学工程
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生物材料
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组织工程
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药物递送
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免疫调节
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纳米医学
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产品关联
DOI
高影响因子
JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY-MATERIALS SCIENCE EDITION
·
2025
·Vol. 40
·期 6
·1552-1562
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IF 1.1
Gao Xinghua,Huang Xiao,Chen Tianyu,Xie Guanya,Wang Xin
A two-step approach was employed to create a composite coating consisting of TiO 2 nanoparticles and extremely elastic polydimethylsiloxane (PDMS). The TiO 2 -PDMS composite coating demonstrates exceptional superhydrophobicity and antifouling efficacy, as evidenced by the static contact angle, contact angle hysteresis, and antifouling tests. The electron microscopic analysis reveals that the composite coating consists of TiO 2 particles and agglomerates, which forms a dual-level roughness structure at the nanometer and micron scales. This unique structure promotes the Cassie-Baxter state of the coating when in contact with the liquid, resulting in an increased static contact angle and a reduced contact angle hysteresis. The PDMS primer facilitates the attachment of TiO 2 particles, resulting in a composite coating with excellent scratch-resistant characteristics. Additionally, the PDMS primer possesses the capacity to retain low surface energy modifiers. Simultaneously, the PDMS primer serves as a reservoir for a low surface energy modifier, enhancing the self-repairing properties of the TiO 2 -PDMS composite coating. This composite coating exhibits effective self-cleaning capabilities against many forms of contaminants, including liquids, solids, and slurries.
研究领域:
材料科学
·
表面工程
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纳米技术
·
涂层与薄膜
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Qiaorong Guo,Yuan Gui,Dongbin Wei,Feipeng Wang,Qiwen An,Yuguo Du
Both of chemical sunscreen 2,4-dihydroxyl benzophenone (BP-1) and physical UV-blocker titanium dioxide (TiO 2 ) nanocomposites are frequently found in aquatic environment, their environmental fates and potential risks should be concerned. The toxicity variation of the composite sunscreen BP-1-TiO 2 during UV-chlorine combined treatment was investigated in this study. It was found that the reaction mixtures exhibited dramatically increased acute toxicity after UV-chlorine treatment of BP-1-TiO 2 , implying the formation of toxic products. Totally, 21 transformation products were tentatively identified, including chlorinated/hydroxylated benzophenones (BPs), hydroxylated benzoyl benzoquinones, phenols, and benzoic acids. We proposed the plausible transformation pathways of BP-1, mainly including hydroxylation, oxidation, chlorination, decarboxylation and ring closing via electrophilic substitution, and Norrish I cleavage. Notably, cosmetic-grade TiO 2 (CG-TiO 2 ) nanocomposites promoted BP-1 transformation and toxic products formation during UV-chlorine combined treatment. The present results highlight that the coatings of CG-TiO 2 nanocomposites are not stable during UV-chlorine combined treatment, the naked TiO 2 would act as photocatalyst to promote BP-1 transformation and generate toxic products. These findings provide valuable insights for assessing potential environmental risks of sunscreen products.
研究领域:
环境科学
·
毒理学
·
水处理
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光化学
·
纳米材料
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产品关联
DOI
高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
·
2025
·
IF 5.4
Congyu Du,Xiaonan Zhang,Huiye Zhang,Yuanyuan Cheng,Jingjing Dong,Liyong Yuan
Uranium (U) pollution, characterized by its radiotoxicity, poses severe threats to environmental safety. Photocatalytic technology has garnered increasing attention for treating U-containing wastewater due to its high efficiency, ease of operation, and absence of secondary pollution. However, photocatalytic materials currently used for U extraction suffer from poor stability, weak resistance to salt ion interference, and high recombination rates of photogenerated carriers, limiting their applicability in complex environments, such as seawater. To tackle these challenges, we have innovatively designed a direct Z -scheme heterojunction photocatalyst, combining carbon nitride doped with oxygen and phosphorus (C 3 N 4 (OP)) with titanium dioxide (TiO 2 ). Here, doping with oxygen and phosphorus, along with the formation of a heterojunction, were employed to modulate the bandgap, enhance visible light absorption, and promote charge separation through an internal electric field. Experimental results demonstrated that the TiO 2 /C 3 N 4 (OP) system achieved a Uremoval efficiency exceeding 85 % under visible light irradiation, while maintaining structural stability and salt ion resistance in simulated seawater. Density Functional Theory (DFT) calculations revealed a directional electric field formation mechanism at the TiO 2 /C 3 N 4 (OP) interface, confirming that superoxide radicals (•O 2 − ) are the dominant active species, with hydroxyl radicals (•OH) serving as auxiliary contributors. This work establishes a synergistic mechanism involving bandgap engineering, interfacial charge separation, and active species collaboration, offering a novel strategy for solar-driven remediation of radioactive pollutants in complex environments.
研究领域:
环境科学
·
光催化
·
核环境工程
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材料科学
·
水体修复
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产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2025
·
IF 3.9
Xie Jun,Shi Xiaoyu,Liu Qi,Liu Ziqian,Qiao Chunying,Wang Qi,Xie Qing
The safety and reliability of dry-type film capacitors depend critically on the insulation performance of their dielectric films. Polypropylene (PP) films serve as primary dielectric materials due to their superior insulation properties, high mechanical strength, and excellent heat resistance. With increasing transmission voltages and equipment miniaturization trends, enhancing dielectric film insulation is crucial to ensure ultra-high-voltage (UHV) transmission security. This study incorporates a fluorinated functional layer–modified nanofiller, MMT@T@S-F (MMT@TiO 2 @SiO 2 -F), into PP films via bulk modification. Film breakdown tests demonstrate that at 25 °C, 50 °C, and 75 °C, PP/MMT@T@S-F films exhibit DC breakdown strength increases of 41.26%, 36.26%, and 32.98% respectively, compared to pure PP films. Micro-nano structural analysis reveals elevated interfacial energy levels in MMT@T@S-F nanoparticles. Simultaneously, the organic fluorine modification introduces high-energy charge traps into PP films, further reducing free-moving carriers while maintaining functional effectiveness at elevated temperatures. Graphical abstract
研究领域:
材料科学
·
电气工程
·
纳米复合材料
·
介电与绝缘
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产品关联
DOI
高影响因子
Catalysts
·
2025
·Vol. 15
·期 12
·1105
·
IF 4
Xin Wang,Longxue Yu,Shuo Wang,Lingyun Xue,Yi Liu,Zhuhui Qiao,Xunyong Liu
Tetracycline (TC) is chemically stable and recalcitrant to natural degradation. Peroxymonosulfate (PMS)-based advanced oxidation processes offer an effective removal strategy, the efficacy of which relies on high-performance heterogeneous catalysts. Titanium dioxide (TiO2) is an ideal material due to its stability and environmental compatibility, yet its practical application is hindered by inadequate PMS activation capacity, particle agglomeration, and difficult recovery. To address these limitations, a heterogeneous Fe/TiO2catalyst was constructed via Fe3+doping, innovatively utilizing polyvinylpyrrolidone (PVP) as a structure-directing agent. PVP’s steric hindrance effectively suppressed nanoparticle agglomeration and enabled high dispersion of Fe active sites, simultaneously enhancing catalytic activity and stability. Under optimized conditions, the Fe/TiO2/PMS system achieved 94.3% TC degradation, following pseudo-first-order kinetics and significantly outperforming pure TiO2used in this experimental system. Radical quenching verified sulfate radicals (SO4•−) as the dominant species. The catalyst demonstrated excellent recyclability, retaining over 80% degradation efficiency after six cycles and enabling convenient magnetic separation. Moreover, in complex water matrices (tap water and seawater), it sustained high removal efficiency (>90% initially, >70% after six cycles), highlighting its superior anti-interference capability and practical potential. This work offers a strategic material design strategy for efficient and robust TC removal in challenging water environments.
研究领域:
环境科学
·
材料化学
·
高级氧化技术
·
催化
·
水净化
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2017
·
IF 6.395
Qinghua Tian,Lingxiangyu Li,Jizhang Chen,Li Yang,Shin-ichi Hirano
Elaborate fabrication of state-of-the-art nanostructure SnO 2 @C-based composites greatly contributes to alleviate the huge volume expansion issue of the SnO 2 anodes. But the preparation processes of most of them are complicated and tedious, which is generally adverse to the development of SnO 2 @C-based composite anodes. Herein, a unique nanostructure of TiO 2 @SnO 2 @C hollow nanobelts (TiO 2 @SnO 2 @C HNBs), including the characteristics of one-dimensional architecture, sandwich protection, hollow structure, carbon coating, and a mechanically robust TiO 2 support, has been fabricated by a facile approach for the first time. As anodes for lithium-ion batteries, the as-fabricated TiO 2 @SnO 2 @C HNBs exhibit an outstanding lithium storage performance, delivering capacity of 804.6 and 384. 5 mAh g −1 at 200 and even 1000 mA g −1 after 500 cycles, respectively. It is demonstrated that thus outstanding performance is mainly attributed to the unique nanostructure of TiO 2 @SnO 2 @C HNBs.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
Frontiers of Materials Science
·
2020
·Vol. 14
·期 2
·163-176
·
IF 1.747
Zhang Zhiyu,Hu Lixia,Zhang Hui,Yu Liping,Liang Yunxiao
Novel large-sized mesoporous nanofilm-constructed macroporous SiO 2 (LMNCMS) with two sets of well-defined 3D continuous pass-through macropores (pore size of 0.5–1.0 μm, wall thickness of 40–50 nm) was prepared through a dual-templating approach, and used as an advanced support for TiO 2 nanocrystalline photocatalyst. The structural and optical properties of the as-prepared materials were investigated by various characterization techniques in order to explore the connections between catalysts’ features and catalytic performance. The photocatalytic activities were evaluated by degradations of methylene blue (MB) and phenol under the simulated sunlight irradiation. To gain insight into the impact of preparation and operation conditions on photocatalytic degradation processes, experiments were conducted at wide ranges of the TiO 2 loading content, calcination temperature, solution pH, and photocatalyst dosage. Nano-TiO 2 /LMNCMS exhibited high photocatalytic activity and stability. Rapid matter transport, good accessibility of pollutants to TiO 2 and high light harvesting could mainly account for the superior photocatalytic performance. The trapping experiments were performed to identify the main reactive species in the catalytic reactions.
研究领域:
材料科学
·
环境科学
·
光催化技术
✓ 已验证
DOI
高影响因子
Energy Sources Part A-Recovery Utilization and Environmental Effects
·
2025
·
IF 2.2
Jieming Chen,Yuchun Zhang,Yao Li,Peng Fu,Zhiyu Li
Pure TiO2 exhibits limited responsiveness to visible light, while the doping of Ti3+ significantly enhances its absorption efficiency in the visible spectrum, improving the efficiency of photogenerated electron utilization. However, during the direct reduction of TiO2 using NaBH4, the instability of surface Ti3+ ions and their susceptibility to oxidation in air limit their performance in photocatalytic applications. Nitrogen doping into TiO2 effectively addresses this issue, improving the stability of Ti3+ ions and significantly enhancing visible-light-driven photocatalytic activity. Experimental results indicate that reducing 1 g of TiO2 with 0.2 g of NaBH4, followed by calcination in an ammonia environment at 300℃, yields a catalyst with optimal visible-light photocatalytic hydrogen evolution activity, achieving a hydrogen production rate of 847.8 μmol h−1 g−1, representing a 177-fold enhancement over pristine anatase TiO2. After modification, the band gap of the catalyst decreased from 3.2 eV to 2.83 eV. This study elucidates the synergistic effects among Ti3+ species, nitrogen dopants, and oxygen vacancies in TiO2-based photocatalysts, demonstrating their crucial roles in enhancing visible-light-driven hydrogen evolution.
研究领域:
材料科学
·
光催化
·
能源化学
·
纳米材料
·
半导体催化
·
环境功能材料
✓ 已验证
产品关联
DOI
高影响因子
FUEL
·
2025
·
IF 7.5
Yuanyuan Li,Xiaoling Xu,Ran Zhang,Xingbao Yang,Kun Jia
Traditional coal mine fire suppression methods face critical limitations, including short-term efficacy, poor penetration in concealed coal seams, and environmental risks from chemical residues. To address these challenges, this study developed a biomaterial-based composite inhibitor integrating physical isolation, free radical quenching, and antioxidant slow release for sustainable prevention of spontaneous coal combustion. A novel antioxidant-loaded composite was synthesized using hollow mesoporous TiO 2 nanoparticles (HM-TiO 2 ) as carriers, which were functionalized via layer-by-layer self-assembly (LBL) of chitosan (CS) and phytic acid (PA) to encapsulate tea polyphenol (TP). This design enables the TP antioxidant activity and low release while leveraging CS/PA’s catalytic char-forming capacity. The chemical composition and micromorphology of the composite were systematically characterized through FTIR, XRD, SEM, and TEM analyses. Programmed temperature oxidation experiments combined with thermogravimetric (TG) and thermogravimetric-Fourier Transform Infrared Spectroscopy (TG-FTIR) measurements were conducted to evaluate inhibition performance by tracking mass loss, characteristic gas emissions, and radical intermediates. Key findings demonstrate that the composite inhibitor: Prolongs coal ignition delay by 48 % compared to untreated coal, attributed to the synergistic barrier effect of the TiO 2 @CS-PA framework and TP’s radical scavenging activity; Reduces CO, CO 2 , CH 4 and H 2 O emissions during low-temperature oxidation; Maintains structural stability above 400 °C, with TiO 2 catalyzing dense char layers to isolate oxygen diffusion. This multifunctional composite overcomes the trade-off between inhibition longevity and environmental compatibility observed in conventional inhibitors (e.g., MgCl 2 , KMnO 4 ), offering a scalable solution for fire prevention in high-level mining areas. The bio-based components (CS, PA, TP) further ensure ecological safety, aligning with green mining initiatives.
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）