Kelin Huang

Bio: Kelin Huang is an academic researcher from Chinese Academy of Sciences. The author has contributed to research in topics: Catalysis & Photocatalysis. The author has an hindex of 1, co-authored 1 publications receiving 9 citations.

Titanium Carbide (Ti3C2) MXene as a Promising Co-catalyst for Photocatalytic CO2 Conversion to Energy-Efficient Fuels: A Review

Abstract: Photocatalytic CO2 reduction to produce valuable chemicals and fuels using solar energy provides an appealing route to alleviate global energy and environmental problems. However, available semicon...

A Review on MXene Synthesis, Stability, and Photocatalytic Applications.

Abstract: Photocatalytic water splitting, CO2 reduction, and pollutant degradation have emerged as promising strategies to remedy the existing environmental and energy crises. However, grafting of expensive and less abundant noble-metal cocatalysts on photocatalyst materials is a mandatory practice to achieve enhanced photocatalytic performance owing to the ability of the cocatalysts to extract electrons efficiently from the photocatalyst and enable rapid/enhanced catalytic reaction. Hence, developing highly efficient, inexpensive, and noble-metal-free cocatalysts composed of earth-abundant elements is considered as a noteworthy step toward considering photocatalysis as a more economical strategy. Recently, MXenes (two-dimensional (2D) transition-metal carbides, nitrides, and carbonitrides) have shown huge potential as alternatives for noble-metal cocatalysts. MXenes have several excellent properties, including atomically thin 2D morphology, metallic electrical conductivity, hydrophilic surface, and high specific surface area. In addition, they exhibit Gibbs free energy of intermediate H atom adsorption as close to zero and less than that of a commercial Pt-based cocatalyst, a Fermi level position above the H2 generation potential, and an excellent ability to capture and activate CO2 molecules. Therefore, there is a growing interest in MXene-based photocatalyst materials for various photocatalytic events. In this review, we focus on the recent advances in the synthesis of MXenes with 2D and 0D morphologies, the stability of MXenes, and MXene-based photocatalysts for H2 evolution, CO2 reduction, and pollutant degradation. The existing challenges and the possible future directions to enhance the photocatalytic performance of MXene-based photocatalysts are also discussed.

Construction of delaminated Ti3C2 MXene/NiFe2O4/V2O5 ternary composites for expeditious pollutant degradation and bactericidal property

Abstract: Increasing flux of toxic pollutants and harmful microbes ejected by the industrial effluents into water resources have been frightening the natural ecosystem over the years. Ergo, the present work aims to decompose Rhodamine B (RhB), Staphylococcus aureus ( S. aureus ) and Bacillus cereus ( B. cereus ) using a novel delaminated Ti 3 C 2 MXene/NiFe 2 O 4 /V 2 O 5 (D-M/NFO/VO) ternary composite. The construction of pristine materials and composites were testified by crystallography studies, while the morphological characteristics were ascertained by microscopy analyses. In comparison with V 2 O 5 and NiFe 2 O 4 /V 2 O 5 , 0.5 wt% D-M/NFO/VO exhibited improved photoactivity, which decomposed 88.7% RhB, 72.8% S. aureus and 85.1% B. cereus after 240 min. As an outstanding co-catalyst, Ti 3 C 2 MXene can efficiently capture electron and prevented the charge carrier recombination in the composite. Meanwhile, the photocatalytic mechanism of the composite was tested via radical trapping analyses and electron spin resonance spectra, which verified that the hydroxyl and superoxide anion radicals served as the pivotal roles for photodegradation of RhB dye. The real-world viability of D-M/NFO/VO photocatalytic system was also examined using the real printed ink wastewater-containing RhB. The phytotoxic effects of real printed ink wastewater-containing RhB toward the germination seeds of Vigna radiata and Vigna unguiculata were significantly decreased after D-M/NFO/VO photocatalysis. This work puts forward for the use of visible light-assisted catalysts toward ameliorating and eradicating the existing multifarious environmental damages. • A novel delaminated Ti3C2/NiFe2O4/V2O5 composite was prepared. • Ti3C2 loading was optimized to boost RhB degradation and bacteria disinfection. • Ti3C2 cocatalyst-stimulated interface electron separation for photocatalysis. • Real effluent treatment and phototoxicity test supported the viability of composite.