Niobium pentaoxide doped cerium dioxide preparation method and product and application thereof

A technology of niobium pentoxide and cerium dioxide, which is applied in the field of material preparation and environmental protection, can solve the problems of low solubility of niobium salt, no VOCs application, uneven particle distribution, etc., and achieve no precipitant, simple operation and simple raw materials Effect

Active Publication Date: 2018-03-20
SHANGHAI NAT ENG RES CENT FORNANOTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the low solubility of niobium salts, the impregnation method often leads to the disadvantage of uneven particle distribution when preparing niobium-doped compounds
Moreover, this compound has been rarely studied in the relevant literature, and its application in the field of VOCs governance has not been found.

Method used

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  • Niobium pentaoxide doped cerium dioxide preparation method and product and application thereof
  • Niobium pentaoxide doped cerium dioxide preparation method and product and application thereof
  • Niobium pentaoxide doped cerium dioxide preparation method and product and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Weigh 7.5688g of cerium nitrate hexahydrate and 3.6605g of citric acid in a 20 mL beaker, add 5 mL of deionized water, stir and dissolve to obtain solution A; weigh 0.1214 g of niobium oxalate in a 20 mL beaker, add 5 mL of Deionized water, stir and dissolve to obtain solution B; weigh 1g of polyvinyl alcohol and place it in a 50 mL beaker, add 30 mL of deionized water, heat and stir to dissolve to obtain solution C, the heating temperature is 60-80°C; under stirring, dissolve 10ml Left and right solution C was dropped into solution B drop by drop, and continued to stir for 0.5-1h to obtain sol D; under strong stirring, drop sol D into solution A drop by drop, and continued to stir for 10min-30min to obtain gel E; The fourth step is to place the gel E in a muffle furnace with a set temperature of 400°C for combustion. After the combustion is complete, it is roasted for 2 hours to obtain the Nb 2 o 5 Doped CeO 2 The carrier material (mass ratio of cerium oxide and niob...

Embodiment 2

[0033]Weigh 7.3417g of cerium nitrate hexahydrate and 3.553g of citric acid in a 20 mL beaker, add 5 mL of deionized water, stir and dissolve to obtain solution A; weigh 0.3642 g of niobium oxalate in a 20 mL beaker, add 5 mL of Deionized water, stir and dissolve to obtain solution B; weigh 1g of polyvinyl alcohol and place it in a 50 mL beaker, add 30 mL of deionized water, heat and stir to dissolve to obtain solution C, the heating temperature is 60-80°C; under stirring, dissolve 10ml Left and right solution C was dropped into solution B drop by drop, and continued to stir for 0.5-1h to obtain sol D; under strong stirring, drop sol D into solution A drop by drop, and continued to stir for 10min-30min to obtain gel E; The fourth step is to place the gel E in a muffle furnace with a set temperature of 400°C for combustion. After the combustion is complete, it is roasted for 2 hours to obtain the Nb 2 o 5 Doped CeO 2 The carrier material (mass ratio of cerium oxide and niobiu...

Embodiment 3

[0035] Weigh 7.5688g of cerium nitrate hexahydrate and 3.6605g of citric acid in a 20 mL beaker, add 5 mL of deionized water, stir and dissolve to obtain solution A; weigh 0.1214 g of niobium oxalate in a 20 mL beaker, add 5 mL of Deionized water, stir and dissolve to obtain solution B; weigh 1g of polyvinyl alcohol and place it in a 50 mL beaker, add 30 mL of deionized water, heat and stir to dissolve to obtain solution C, the heating temperature is 60-80°C; under stirring, dissolve 10ml Left and right solution C was dropped into solution B drop by drop, and continued to stir for 0.5-1h to obtain sol D; under strong stirring, drop sol D into solution A drop by drop, and continued to stir for 10min-30min to obtain gel E; The fourth step is to place the gel E in a muffle furnace with a set temperature of 400°C for combustion. After the combustion is complete, it is roasted for 3 hours to obtain the Nb 2 o 5 Doped CeO 2 The carrier material (mass ratio of cerium oxide and niob...

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Abstract

The invention provides a niobium pentaoxide doped cerium dioxide preparation method and a product and application thereof. The material is prepared by the steps of respectively dissolving niobium oxalate and cerous nitrate, adding a citric acid combustion improver and a polyvinyl alcohol solubilizer and putting into a muffle furnace to be simply roasted. The material is prepared from Nb2O5 with amass ratio of 1% to 3% and CeO2 with a mass ratio of 97% to 99%. The material is prepared by the steps of respectively dissolving the niobium oxalate and the cerous nitrate, adding the citric acid combustion improver and the polyvinyl alcohol solubilizer and putting into the muffle furnace to be simply roasted. The method disclosed by the invention has the advantages of convenience in preparation,no precipitator, 100% utilization in metal oxide, no waste liquid and waste residue generation and the like. The material further has excellent oxidation susceptibility and can serve as a catalyst ora carrier to be applied to varieties of reactions.

Description

technical field [0001] The invention relates to a preparation method of ceria doped with niobium pentoxide and its product and application, belonging to the technical field of material preparation and environmental protection. The material can be used as a catalyst or a carrier. Background technique [0002] CeO 2 Has a unique cubic fluorite-type crystal structure, has the characteristics of variable valence, through Ce 3+ and Ce 4+ It is an environmentally friendly material and has many important applications in the fields of energy and environment. Cerium oxide can not only be used as an active component, but also a good carrier for other active components. Adding a second metal to ceria further improves its performance by introducing lattice defects. [0003] In recent years, there have been many studies on doping second metals in cerium oxide. For example, patent CN103055875A, a copper-doped cerium oxide catalyst was synthesized by a liquid phase method. Since the pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/20F23G7/07
CPCB01J23/002B01J23/20F23G7/07
Inventor 何丹农袁静张晓岚赵昆峰金彩虹
Owner SHANGHAI NAT ENG RES CENT FORNANOTECH
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