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Preparation method and applications of calcium-doped LaNiO3 perovskite type photocatalyst

A perovskite type, photocatalyst technology, applied in physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, etc., can solve problems such as failure to achieve degradation effects, and achieve good results Adsorption and photocatalytic effects, small secondary pollution, great use value and research value

Inactive Publication Date: 2019-11-19
YULIN NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Conventional treatment methods for wastewater mainly include physical methods, chemical methods, biological methods, biofilm methods, etc., but these methods have great limitations in practical application and have not achieved the desired degradation effect

Method used

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  • Preparation method and applications of calcium-doped LaNiO3 perovskite type photocatalyst
  • Preparation method and applications of calcium-doped LaNiO3 perovskite type photocatalyst
  • Preparation method and applications of calcium-doped LaNiO3 perovskite type photocatalyst

Examples

Experimental program
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Effect test

Embodiment 1

[0030] NeO 3 The preparation of A-site doped calcium ions is based on the ratio of nickel ions to lanthanum ions + calcium ions (calcium ions: lanthanum ions molar ratio = 0.1, 0.4, 0.5) = 1:1, respectively weigh lanthanum nitrate 0.8127g and calcium nitrate 0.06g in the same beaker, 1.1g of nickel nitrate in another beaker, add 30mL of distilled water each time, fully dissolve and mix well in the same volume, then place it on a multi-point magnetic stirrer at a speed of 230r / min Stir in medium for 30min, add 3mol / L ammonia solution drop by drop with a rubber dropper under the condition of stirring (one drop every 1min), and stop until the pH of the solution is greater than or equal to 12 (measured by extensive test paper) , in a circulating water vacuum pump, washed (2-3 times with distilled water), filtered, and dried in a blast drying oven at 90°C, after drying, it was fully ground and placed in an artificial intelligence box-type resistance furnace at 600°C Medium roasti...

Embodiment 2

[0032] The difference from Example 1 is that 0.8866g of lanthanum nitrate, 0.12g of calcium nitrate, calcium ion: lanthanum ion molar ratio = 0.2, after drying, it is fully ground and baked in an artificial intelligence box-type resistance furnace at 700°C 2h.

Embodiment 3

[0034] The difference from Example 1 is that lanthanum nitrate is 0.9605g, calcium nitrate is 0.18g, and the calcium ion:lanthanum ion molar ratio is 0.3.

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Abstract

The invention relates to a perovskite type photocatalyst, and specifically discloses a preparation method and applications of a calcium-doped LaNiO3 perovskite type photocatalyst. The preparation method comprises: adding water to lanthanum nitrate and nickel nitrate, completely dissolving, adding fully dissolved nickel nitrate, adding an ammonia water solution in a dropwise manner under stirring conditions, adjusting the pH value of the solution to 9-12, generating a precipitate, filtering the product, washing, drying, and roasting, wherein a molar ratio of the calcium ions to the lanthanum ions is 0.1-0.5. The invention further discloses applications of the calcium-doped LaNiO3 perovskite type photocatalyst in degradation of methyl orange in printing and dyeing wastewater. According to the present invention, the preparation method has characteristics of simple synthesis conditions and low secondary pollution, and the obtained calcium-doped LaNiO3 perovskite type photocatalyst has goodcatalytic effect, wherein the degradation effect reaches 95.01%.

Description

technical field [0001] The present invention relates to a perovskite photocatalyst, in particular to a calcium-doped LaNiO 3 Preparation method of perovskite photocatalyst. At the same time, the invention also relates to the application of the catalyst in degrading methyl orange in printing and dyeing wastewater. Background technique [0002] With the rapid development of human industry and society, the scale of urbanization continues to expand, and the amount of urban water consumption and loss continues to increase, which to a certain extent exacerbates the shortage of water resources and water pollution, and the environmental problems are becoming more and more prominent. The resulting water crisis It has become an important restrictive factor for social and economic development. Since the 1870s, scientists began to study photocatalytic technology. In 1972, two scientists, Fujishina and Honda, discovered that TiO 2 Single crystals can decompose H 2 O, has caused a wav...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/83C02F1/30C02F101/30C02F103/30C02F101/38
CPCB01J23/83C02F1/30C02F2305/10C02F2101/308C02F2101/40C02F2103/30B01J35/39
Inventor 曾玉凤莫再勇罗永朝
Owner YULIN NORMAL UNIVERSITY
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