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Journal articleHe L, Xu Y, Yang Z, et al., 2024,
Copper-decorated strategy based on defect-rich NH2-MIL-125(Ti) boosts efficient photocatalytic degradation of methyl mercaptan under sunlight.
, Environ Pollut, Vol: 344Photocatalysis has received significant attention as a technology that can solve environmental problems. Metal-organic frameworks are currently being used as novel photocatalysts but are still limited by the rapid recombination of photogenerated carriers, low photogenerated electron migration efficiency and poor solar light utilization rate. In this work, a novel photocatalyst was successfully constructed by introducing Cu species into thermal activated mixed-ligand NH2-MIL-125 (Ti) via defect engineering strategy. The constructed defect structure not only provided 3D-interconnected gas transfer channels, but also offered suitable space to accommodate introduced Cu species. For the most effective photocatalyst 0.2Cu/80%NH2-MIL-125 (300 °C) with optimized Cu content, the photocatalytic degradation rate of CH3SH achieved 4.65 times higher than that of pristine NH2-MIL-125 under visible light (λ > 420 nm). At the same time, it showed great degradation efficiency under natural sunlight, 100 ppm CH3SH was completely removed within 25 min in full solar light illumination. The improved catalytic efficiency is mainly due to the synergistic effect of the integrated Schottky junction and rich-defective NH2-MIL-125, which improved the bandgap and band position, and thus facilitated the separation and transfer of the photo-generated carriers. This work provided a facile way to integrate Schottky junctions and rich-defective MOFs with high stability. Due to its excellent degradation performance under sunlight, it also offered a prospective strategy for rational design of high-efficiency catalysts applied in environmental technologies.
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Journal articleHe L, Yang Z, Lu X, et al., 2023,
Defective UiO-66 by metal doping for highly efficient photocatalytic degradation of methyl mercaptan
, Journal of Environmental Chemical Engineering, Vol: 11Defective UiO-66 by metal doping exhibits considerable promise in the photocatalytic degradation of environmental contaminants, albeit how different metal doping affect formation of defects and its efficacy in the degradation of methyl mercaptan has yet to be comprehensively explored. In this study, a one-step solvothermal method was employed to successfully synthesize six distinct metal-doped UiO-66 with variations of defects by incorporating Ce, Al, Cu, Cr, Mg, and Fe. A systematic examination of the structural and photochemical attributes of these metal-doped UiO-66 materials was conducted through a series of characterisations. Metal doping creates defects in UiO-66, changes its colour and morphology and increases its specific surface area. Subsequently, the adsorption and photocatalytic degradation characteristics of these nanomaterials concerning methyl mercaptan were investigated. In comparison to pristine UiO-66, all metal-doped UiO-66 variants exhibited enhanced adsorption and photocatalytic degradation capabilities towards methyl mercaptan. Notably, among the prepared materials, FeUiO-66 demonstrated the most exceptional photocatalytic degradation performance, followed by CuUiO-66, AlUiO-66, CeUiO-66, CrUiO-66, and MgUiO-66 in that order. 1.0FeUiO-66 exhibiting the most remarkable performance, achieving a 99 % degradation of methyl mercaptan within 30 min. This represented a degradation rate 36.8 times higher than that of pure UiO-66, attributable to the incorporation of low-valence metals into the UiO-66 framework, resulting in the creation of oxygen vacancy defects. Furthermore, the presence of these metals facilitated electron transport, thereby enhancing the efficiency of photocatalytic degradation. This study underscores the potential of various metals-doped UiO-66 for adsorption and photocatalytic elimination of methyl mercaptan.
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Journal articleWu C, Ding Y, Almeida-Fernandes L, et al., 2023,
State-of-the-art review on the web crippling of pultruded GFRP profiles
, THIN-WALLED STRUCTURES, Vol: 192, ISSN: 0263-8231 -
Journal articleTam L-H, Wu R, Minkeng MAN, et al., 2023,
Understanding creep behavior of carbon fiber/epoxy interface via molecular dynamics simulation
, MECHANICS OF ADVANCED MATERIALS AND STRUCTURES, Vol: 30, Pages: 4052-4064, ISSN: 1537-6494- Author Web Link
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- Citations: 3
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Journal articleMa H, He L, Wu C, 2023,
Development of Reactive MgO Cement-Silica Fume-Based Strain-Hardening Engineered Cementitious Composite
, JOURNAL OF MATERIALS IN CIVIL ENGINEERING, Vol: 35, ISSN: 0899-1561 -
Journal articleTam L-H, Zhou A, Yu Z, et al., 2023,
Editorial: Microstructures and Mechanical Properties of Cement-Based Composites
, MATERIALS, Vol: 16 -
Journal articleWu C, Pan Y, Yan L, 2023,
Mechanical Properties and Durability of Textile Reinforced Concrete (TRC)-A Review
, POLYMERS, Vol: 15 -
Journal articleWu R, Wang XQ, Zhao D, et al., 2023,
Degradation of fiber/matrix interface under various environmental and loading conditions: Insights from molecular simulations
, CONSTRUCTION AND BUILDING MATERIALS, Vol: 390, ISSN: 0950-0618- Author Web Link
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- Citations: 1
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Journal articleWu C, Hou J-A, Liu H, et al., 2023,
Understanding moisture effect on nonlinear vibrations of epoxy thin film via a multiscale simulation
, JOURNAL OF SOUND AND VIBRATION, Vol: 553, ISSN: 0022-460X -
Journal articleTam L-H, Minkeng MAN, Lau D, et al., 2023,
Molecular interfacial shearing creep behavior of carbon fiber/epoxy matrix interface under moisture condition
, ENGINEERING FRACTURE MECHANICS, Vol: 282, ISSN: 0013-7944- Author Web Link
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- Citations: 5
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Journal articleWu C, Ding Y, He L, et al., 2023,
Web crippling of pultruded GFRP built-up sections
, THIN-WALLED STRUCTURES, Vol: 185, ISSN: 0263-8231 -
Journal articleWu C, Yu Y-Z, Tam L-H, et al., 2023,
Effects of bondline defects on the bond behaviour of CFRP-steel double strap joints
, COMPOSITE STRUCTURES, Vol: 308, ISSN: 0263-8223 -
Journal articleWu C, Liu S, Guo J, et al., 2023,
Relationship between Thermal Conductivity and Compressive Strength of Insulation Concrete: A Review
, Journal of Research Updates in Polymer Science, Vol: 12, Pages: 80-96Developing insulation concrete with high strength is essential for the construction of energy saving buildings. This is important to achieve carbon neutrality in the modern building industry. This paper reviews the existing studies in the literature on insulation concrete. This paper aims to reveal the correlation between the thermal conductivity and strength of concrete and identify the most effective method to make insulation concrete with lower thermal conductivity but higher strength. The review is carried out from two perspectives, including the effects of different foaming methods and various lightweight aggregates. As for the foaming methods, the chemical and mechanical foaming methods are discussed. As for the lightweight aggregates, cenospheres, porous aggregates, aerogels, and phase change materials are assessed. It is clearly observed that the thermal conductivity and compressive strength of concrete can be fitted by a linear function. As for the foaming methods, chemical foaming using hydrogen peroxide is the most effective to produce concrete with relatively lower thermal conductivity and higher compressive strength. For concrete with lightweight aggregates, cenospheres are the best option. Finally, recommendations are made to develop concrete with lower thermal conductivity and higher strength.
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Journal articleFame CM, He L, Tam L-H, et al., 2023,
Fatigue Damage Tolerance of Adhesively Bonded Pultruded GFRP Double-Strap Joints with Adhesion Defects
, JOURNAL OF COMPOSITES FOR CONSTRUCTION, Vol: 27, ISSN: 1090-0268 -
Journal articleYu Y-Z, Tam L-H, Wu C, 2023,
A universal solution of the bond behaviour between CFRP-steel double strap joints considering steel yielding
, COMPOSITE STRUCTURES, Vol: 304, ISSN: 0263-8223- Author Web Link
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- Citations: 1
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