JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2024
·
IF 11.2
Rong Liu,Yan Gao
Preparing metal-organic frameworks (MOFs) film in situ on the surface of the Ti-6Al-4V (TC4) titanium alloy is challenging owing to the dense and stable surface TiO 2 passive film. In this study, titanium-doped zirconium-based MOFs (Zr(Ti)-MOFs) film was constructed in situ on the TC4 alloy in one step at a low temperature and atmospheric pressure, with ZrCl 4 as the source of Zr metal ions. ZrCl 4 attacked and dissolved the TiO 2 film to form Zr-O-Ti bonds on the surface of TC4 to provide nucleation sites for further reactions. At the same time, Zr 4+ and dissolved Ti 4+ combined in solution to form Ti containing Zr-O cluster nodes, which aggregated and grafted to the Zr-O-Ti bonds on the substrate surface, and reacted with organic ligands (terephthalic acid) to form Zr(Ti)-MOFs film. The Ti 4+ dissolved from the TC4 participate in the Zr-MOFs formation, thereby changing the high temperature and high-pressure conditions required for the traditional preparation of Zr-MOFs (UiO-66). The in situ preparation of Zr(Ti)-MOFs on TC4 was achieved at 80°C under atmospheric pressure conditions. This study elucidated the growth mechanism of Zr(Ti)-MOFs on the TC4 surface, providing a reference for the design and in-situ preparation of multifunctional MOFs on the TC4 titanium alloy.
研究领域:
材料科学
·
表面工程
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2019
·
IF 14.229
Shiyu Zhang,Meng Du,Zipeng Xing,Zhenzi Li,Kai Pan,Wei Zhou
Defective-rich and electron-rich mesoporous NH 2 -MIL-125(Ti)@ZnIn 2 S 4 /CdS hierarchical tandem heterojunctions were fabricated through two-step solvothermal and one-step hydrothermal strategies. The interface with electron enrichment can cause active interface reaction, fast transfer and separation of charge carriers and restrain the photocorrosion of CdS. ZnIn 2 S 4 , as a bridge to connect Ti-MOFs and CdS, favors the separation of charge carriers and forms tandem heterojunctions. The as-prepared photocatalyst has a relative large surface area of ∼877.0 m 2 g −1 and a narrow band gap of ∼1.84 eV, which could absorb visible light efficiently. Furthermore, it exhibits a high photocatalytic hydrogen generation rate which was increased to 2.367 mmol g −1 h −1 and the high photocatalytic degradation efficiency for 2,6-dichlorophen and 2,4,5-trichlorophenol which were 98.6% and 97.5%, respectively. Additionally, recycling text for several cycles indicates the high stability. This novel Ti-MOFs based core@shell hierarchical tandem heterojunctions may offer a new insight for fabricating high-performance heterojunctions for multi-channel charges transfer.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
CELLULOSE
·
2019
·Vol. 26
·期 17
·9335-9348
·
IF 3.917
Yang Yingying,Huang Wei,Guo Zengpei,Zhang Shiyu,Wu Feng,Huang Jingjing,Yang Hongjun,Zhou Yingshan,Xu Weilin,Gu Shaojin
Abstract Superhydrophobic cotton fabrics with improved ultraviolet resistance were prepared via in situ growing NH 2 -MIL-125(Ti)(Ti-MOF) nanoparticles on cotton fibers and subsequently coating with polydimethylsiloxane (PDMS) under room temperature. The synergetic effect of Ti-MOFs nanoparticles and PDMS was critical and essential for obtaining a superhydrophobic coating with anti-UV property. The surface microstructure, chemical composition, and superhydrophobic property of the as-prepared fabrics were characterized by K/S value, scanning electron microscopy, X-ray photoelectron spectroscopy, energy dispersive spectroscopy, and water contact angle (WCA) measurements. The as-prepared cotton fabrics not merely exhibited desirable superhydrophobic property with a water contact angle (WCA) of 154.7 ± 0.7° and a sliding angle of 3.6°, but also displayed the considerable UV resistance. The oil–water separation, stability of UV protection and superhydrophobicity were also investigated. The superhydrophobicity, anti-ultraviolet property, and K/S value of as-prepared PDMS/Ti-MOFs@cotton fabrics were stable after 300 cycles of abrasion and 5 cycles of washing. The facile synthesis technique provided a simple method for scalable construction of multifunctional fabrics. Graphic abstract
研究领域:
材料科学
·
纺织工程
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Energy Chemistry
·
2020
·
IF 7.216
Xiao Liu,Peijie Fan,Liangping Xiao,Jian Weng,Qingchi Xu,Jun Xu
The generation of green hydrogen (H 2 ) energy is of great significance to solve worldwide energy and environmental issues. Reduced Ti based photocatalyst has recently attracted intensive attention due to its excellent photocatalytic activity, while the synthesis of reduced Ti based photocatalysts with high stability is still a great challenge. Here, we report a facile method for synthesis of reduced Ti metal organic frameworks (small amounts of Pt incorporated) encapsulated BP (BP/R-Ti-MOFs/Pt) hybrid nanomaterial with enhanced photocatalytic activity. The strong interaction between Ti and P reduces the valence state of the binding Ti 4+ on the BP surface, forming abundant reduced Ti 4+ within R-Ti-MOFs/BP. Such reduced Ti 4+ render R-Ti-MOFs/BP efficient charge transfer and excellent light absorption capability, thus promote the photocatalytic H 2 production efficiency. Furthermore, the Ti-P interaction stabilizes both reduced Ti 4+ and BP during the photocatalytic reaction, which greatly enhanced the stability of the obtained BP/R-Ti-MOFs/Pt photocatalyst.
研究领域:
材料科学
·
能源化学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2025
·
IF 8.3
Yanping Dong,Xiqiang Tian,Muhammad Zahid
Due to their highly tunable structures and porous nature, metal-organic frameworks (MOFs) have garnered substantial interest as versatile platforms for immobilizing noble metal nanoparticles in selective hydrogenation catalysis. However, the inherent limitations of MOFs, such as small micropores and weak interactions between inorganic nodes and guest noble metals (caused by organic ligands), often result in limited accessibility and the collapse of reactive sites. To overcome these challenges, this study focuses on a novel partial deligandation strategy and further, stabilizes the active Pt nanoparticles over it. Specifically, Ti-MOF-250 was synthesized by partially decomposing NH 2 –Ti-MIL-125 (Ti-MOF) at 250 °C, followed by the eco-friendly polyol reduction method to produce Pt/Ti-MOF-250 catalyst. Compared to the non-deliganded Ti-MOF, the Ti-MOF-250 catalyst, which retains residual organic ligands, exhibits a greater surface area, a hierarchical porous structure, and active defect sites that expose the unsaturated Ti metal centers. These features synergistically control the Pt particle size, enhance their uniform dispersion, and increase the number of exposed reactive sites. The distinctive structural properties of the Pt/Ti-MOF-250 catalyst enable unique furfural (FAL) adsorption geometries, achieving exceptional FAL conversion (97.4 %) and high selectivity (98.1 %) toward furfuryl alcohol (FOL). The partial deligandation approach paves the way to enhance the physicochemical properties of pristine MOFs, enabling the homogeneous confinement and stabilization of Pt nanoparticle catalysts to achieve exceptional catalytic activity, selectivity, and stability in hydrogenation reactions.
研究领域:
材料化学
·
催化化学
·
纳米科学
·
多孔材料
·
绿色化学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2026
·
IF 9.1
Zhibang Gao,Qiumin Wang,Chi Wang,Shuangyou Bao,Fei Wang,Kai Li,Yi Mei
The performance of peroxymonosulfate (PMS)-based advanced oxidation processes is often limited by inefficient reactive oxygen species (ROS) utilization and instability of active metal sites. Herein, a dual-confinement strategy is proposed by integrating spatial pore confinement and coordination confinement into Ti-based metal–organic frameworks (MOFs) to regulate PMS activation. Compared with Ti-BPDC, the pyridine-functionalized Ti-BPYDC framework provides Co N coordination sites, enabling stronger stabilization and electronic modulation of Co active centers. As a result, the Co-Ti-BPYDC/PMS system achieves enhanced tetracycline degradation (98.83% within 30 min), higher reaction kinetics (0.54 min −1 ), and improved mineralization (44.73%). Mechanistic studies reveal that the dual-confinement structure promotes interfacial electron transfer, stabilizes the Co 3+ /Co 2+ redox cycle, and favors a singlet oxygen ( 1 O 2 )-dominated non-radical pathway, while suppressing Co leaching. Consequently, the catalyst exhibits excellent stability and resistance to environmental interference. This work provides a general strategy for designing efficient and stable MOF-based catalysts for advanced oxidation processes.
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）