Preparation method and application of hierarchical porous molecular sieve-supported PtRu catalyst
A molecular sieve and multi-stage pore technology, which is applied in the reduction of p-nitrophenol, and the synthesis field of multi-stage pore molecular sieve-loaded PtRu catalysts, can solve the problem of multi-stage pore synthesis, such as the difficulty of increasing the temperature, and achieve the effect of preventing precipitation
Active Publication Date: 2018-05-01
UNIV OF JINAN
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In addition to pore size and surface area, pore structure also has an important impact on the reaction. In addition, compared with single-stage and few-stage pore structures, multi-stage pore molecular sieves have a wider range of applications and can produce greater economic value, but the corresponding Yes, the synthesis of multi-level pores is difficult to increase, and there are few reports on the synthesis of multi-level pore molecular sieves in the prior art
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Embodiment 1
[0025] Pt 2 The preparation method of Ru / EMT-FAU / SBA-15 catalyst:
[0026] A. Add 0.35g sodium hydroxide, 1.04g sodium aluminate, 1.0g 18-crown-6, 0.034g sodium phosphate, 4.74g deionized water and 6.3g silica sol into the reaction kettle and stir at 25 degrees Celsius dissolved as solution I;
[0027] B. Add 0.12g 3-mercaptopropyltrimethoxysilane, 0.15g sodium hydroxide and 2g deionized water into the beaker and stir to dissolve, then add 1.8mL of H 2 PtCl 6 (100mol / L) and 0.9mL of RuCl 3 solution (100mol / L), as solution II;
[0028] C. Add solution II dropwise to solution I and stir for 3 hours, then age at 25 degrees Celsius for 24 hours, then transfer to a reaction kettle and crystallize at 100 degrees Celsius for 96 hours to obtain a PtRu / EMT-FAYU zeolite microcrystalline emulsion;
[0029] D. Add 2g of P123 organic matter to the hydrochloric acid solution to dissolve and disperse, add dropwise the tetraethyl orthosilicate of 4.28g and the PtRu / EMT-FAU zeolite microc...
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The invention relates to a preparation method for a hierarchical porous molecular sieve-supported PtRu catalyst and a method for reducing 4-nitrophenol. According to the present invention, PtRu alloynano-particles are successfully introduced into microporous channels of a hierarchical porous molecular sieve EMT-FAU / SBA-15 by using of microwave assisted heating and a specific blended microcrystalline emulsion synthetic method, and the PtRu alloy nano-particles prepared by the method has relatively high stability because of confinement effect of the molecular sieve, meanwhile, the prepared PtRu / EMT-FAU / SBA-15 catalyst shows excellent catalytic performance in a reduction reaction of 4-nitrophenol, and results show that the element proportions in PtRu alloy plays an important role in the reduction reaction of 4-nitrophenol.
Description
technical field [0001] The invention relates to the field of molecular sieve synthesis, in particular to a method for synthesizing a PtRu catalyst loaded on a multi-level pore molecular sieve and a method for reducing p-nitrophenol. Background technique [0002] Among all toxic organic wastes, nitrophenol compounds are the most common and have high stability and solubility in water. Among all nitrophenol compounds, p-nitrophenol is one of the typical representatives. At present, the common treatment methods of p-nitrophenol waste mainly include electrocoagulation, microbial degradation, catalytic reduction and catalytic oxidation. Among them, the tetranitrophenol catalytic reduction method is currently the most commonly used and the most economical method, and its reduction product 4-aminophenol can also be used as a synthetic raw material for other commonly used compounds. Therefore, it is of great research significance to develop new tetranitrophenol reduction catalysts ...
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Login to View More IPC IPC(8): B01J29/80C07C213/02C07C215/76B01J37/08
CPCB01J29/005B01J29/0354B01J29/7438B01J37/082B01J37/346B01J2229/18C07C213/02C07C215/76
Inventor 高道伟吕一品李书娜陈国柱
Owner UNIV OF JINAN