Mercapto-aryl functionalized MXene material and preparation method and application thereof
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A functionalized, mercaptoaryl technology, applied in the field of two-dimensional materials, can solve the problems of limiting the industrial application of new two-dimensional materials, metal atoms are easily oxidized, etc., to improve the antioxidant performance and structural stability, facilitate separation, enhance hydrophobic effect
Active Publication Date: 2020-06-19
HUAIYIN TEACHERS COLLEGE
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[0008] However, the exposed metal atoms on the surface of 2D MXene are easily oxidized in oxygen-rich environments such as air and water, res
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Embodiment 1
[0048] Example 1 Ti 3 C 2 preparation of
[0049] (1) Etching Ti 3 AlC 2 :
[0050] After dissolving LiF (1.4g) in 15ml of 12mol / L hydrochloric acid solution and 4.5ml of water at room temperature, the solution was heated to 40°C and continued to stir for 10min; 3 AlC 2 (1g) was added to the above solution in a small amount in batches, and after stirring at 40°C for 24 hours, the Al element in the compound was completely removed to obtain an accordion-shaped compound with Ti 3 C 2 The multi-layer MXene material of the structural formula, the mixture is subjected to centrifugation, washing, ultrasonication, and vacuum drying to obtain Ti 3 C 2 T m (MXene material), T m Is the surface group F, Cl or OH.
[0051] (2) 0.5g Ti obtained in step (1) 3 C 2 T m Add it to 10ml of 4mol / L sodium hydroxide alkali solution, stir at room temperature for 8h, centrifuge, and wash the solid with water until the eluate is neutral, then disperse the solid in 5ml of water to obtain...
Embodiment 2
[0058] Example 2 Ti 3 C 2 Preparation of supported palladium catalyst
[0059] With the Ti that 0.2g embodiment 1 makes 3 C 2 Add 10ml of water, stir at 25°C for 30min, then add Pd(OAc) to the mixture 2 (3ml 0.6mg / m1), after ultrasonication for 6h, centrifugal separation, and wash with water and ethanol several times respectively, in vacuum drying 8h, obtain catalyst Ti 3 C 2 Supported palladium catalyst, the Pd load is 0.42wt%. Through the nitrogen adsorption-desorption isotherm test, it was found that the specific surface area decreased, which proved that the Pd catalyst was successfully loaded, and the actual loading amount of the ICP-MS test was 0.39wt%.
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Abstract
The invention discloses a mercapto-aryl functionalized MXene material, which is called a mercapto-aryl-MXene material for short, and has a Mn+1Xn-(Ph-SH) structure, wherein M is any one or at least two metal elements in the IIIB group, the IVB group, the VB group, the VIB group and the VIIB group, x is any one or two of C and N elements, and n is 1, 2 or 3. Mercapto-aryl is used as a surface group, so that the oxidation resistance and the structural stability of the MXene material are enhanced, the binding capacity of the MXene material and a reduction product Cr<3+> is improved, meanwhile, the solubility of the MXene material in wastewater is reduced, and the separation of the MXene material and a water-soluble solvent is facilitated. The invention also discloses a sulfydryl aryl-MXene material supported palladium catalyst. The sulfydryl improves the adsorption capacity of the sulfydryl-MXene material supported palladium catalyst on an organic reaction substrate, and is beneficial tocombination of the sulfydryl-MXene material and the organic reaction substrate, thereby improving the activity of the catalyst.
Description
technical field [0001] The invention relates to the technical field of two-dimensional materials, in particular to a mercapto-functionalized MXene material and its preparation method and application. Background technique [0002] MXene materials are a class of layered nano-two-dimensional materials with novel structures and unique properties. Since their discovery in 2011, they have received extensive attention and research due to their high specific surface area, high aspect ratio, and unique electronic structure. At present, it has been widely used in the fields of energy storage and environmental governance. [0003] MXene is usually extracted from its parent material MAX phase (M n+1 AX n , n=1-3, M is a transition metal, which can be Sc, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Y, Zr, Nb, Mo, Ru, Rh, Pd, Au, One or more of Cd, Hf, Ta, W, Re, Os, Ir, Pt, Au, La, Ce; A is a IIIA or IVA group element, and X is C or N) A layer atomic layer obtained , the reaction process is a...
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