BiPO4 nanorod and preparation method and application thereof

A nanorod and reaction technology, which is applied in the field of photocatalytic materials, can solve the problems of variable pressure environment, low single preparation at high temperature, etc., and achieve the effects of good ultraviolet photocatalytic activity, cheap raw materials, and reduced product cost.

Inactive Publication Date: 2013-01-16
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of this invention is to provide a kind of BiPO 4 The nanorod and its preparation method and application solve the shortcomings of the traditional preparation method in the variable pressure environment, high temperature, and small amount of single preparation, and are BiPO 4 The industrialized production and practical application have established a good technical foundation. The BiPO with monoclinic phase monazite and hexagonal phase mixed crystal structure (ratio about 5:1) provided by the present invention 4 Has good UV photocatalytic activity

Method used

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  • BiPO4 nanorod and preparation method and application thereof
  • BiPO4 nanorod and preparation method and application thereof
  • BiPO4 nanorod and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0022] Example 1, adjusting the reaction time to prepare BiPO 4 Nano stave

[0023] Weigh 24.3g (50mmol) of Bi(NO 3 ) 3 ·5H 2 O and 7.8g (50mmol) of NaH 2 PO 4 2H 2 O, add 5.0L three-necked flask, measure 3.6L deionized water and join in the three-necked flask, then put the magnet into the three-necked flask. The spherical condenser is connected to a small mouth of the three-necked flask, and the temperature sensor of the electric heating jacket is inserted into the reaction solution from the other small mouth of the three-necked flask, and the big mouth in the middle of the three-necked flask is plugged tightly with a stopper. Adjust the magnetic stirring knob on the electric heating mantle to 800r / min, and set the temperature of the electric heating mantle temperature control panel to 100°C. After heating for about 30 min, the reaction solution began to boil. Timing control reaction time is 24h, 36h, 48h, 60h and 72h from the time when the reaction solution boils (5...

Embodiment 2

[0025] Embodiment 2, regulation and control Bi 3+ / PO 4 3- Ratio-prepared BiPO 4 Nano stave

[0026] Weigh 24.3g (50mmol) of Bi(NO 3 ) 3 ·5H 2 O and 39.0 g (250 mmol) of NaH 2 PO 4 2H 2 O, Bi 3+ / PO 4 3- The molar ratio is 1:5 (fixed Bi(NO 3 ) 3 ·5H 2 The amount of O is 50mmol, and the regulation of Bi 3+ / PO 4 3-The molar ratios were 1:1, 1:1.5, 1:2, 1:4, 1:5, 1:6, 1:7 and 1:10, and a total of 8 groups of experiments were done, and NaH was weighed according to different ratios. 2 PO 4 2H 2 The amount of O is respectively 7.8g, 11.7g, 15.6g, 31.2g, 46.8g, 54.6g and 78.0g), add a 5.0L three-necked flask, measure 3.6L deionized water into the three-necked flask, and then put the magnetic into a three-neck flask. Connect the spherical condenser to a small mouth of the three-necked flask, insert the temperature sensor of the electric heating mantle into the reaction solution from the other small mouth of the three-necked flask, and plug the middle big mouth o...

Embodiment 3

[0028] Example 3, adjusting the pH value of the reaction solution to prepare BiPO 4 Nano stave

[0029] Weigh 24.3g (50mmol) of Bi(NO 3 ) 3 ·5H 2 O and 39.0 g (250 mmol) of NaH 2 PO 4 2H 2 O, Bi 3+ / PO 4 3- The molar ratio is 1:5, put into a 5.0L three-necked flask, measure 3.6L deionized water into the three-necked flask, and then put the magnet into the three-necked flask. Adjust the magnetic stirring knob on the electric heating mantle to 800r / min, measure the pH value of the reaction mixture with a pHSJ-4A pH meter at room temperature to 2.2, and use concentrated HNO 3 Adjust the pH of the reaction mixture to 1.0 and 1.5, and use 1.0mol / L NaOH solution to adjust the pH of the reaction mixture to 3.0, 5.0 and 7.0 (6 groups of tests were done in total). After the pH value of the reaction solution is adjusted to an appropriate value, connect the spherical condenser tube to one mouth of the three-necked flask, and insert the temperature sensor of the electric heatin...

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Abstract

The invention provides a BiPO4 nanorod and a preparation method and application thereof. The preparation method of the BiPO4 nanorod includes the steps: adding Bi(NO3)3 5H2O and NaH2PO4 2H2O into deionized water for reaction so as to obtain precipitate, namely the BiPO4 nanorod. BiPO4 which is prepared by the method and of monoclinic-phase monazite and hexagonal mixed crystal structures has fine ultraviolet light catalytic activity, and MB (methylene blue) liquid phase degradation rate of the BiPO4 reaches degradation activity of BiPO4 prepared by a hydrothermal method; and the whole preparation method is low in raw material cost, simple in process, low in preparation temperature and suitable for industrialized mass production and has extremely high practical value and application prospect, and product cost is effectively reduced.

Description

technical field [0001] The present invention relates to a BiPO 4 The nanorod and its preparation method and application belong to the technical field of photocatalytic materials. Background technique [0002] Photocatalysis has important prospects in environmental purification and energy utilization, and is a hotspot in physical and chemical research. Due to TiO 2 The photocatalysts based on photocatalysts have constraints such as high photogenerated electron-hole recombination rate and narrow absorption spectrum, and no breakthrough has been made in their modification. At present, the search for new and efficient composite oxide photocatalysts has attracted some attention. Among them, as a new type of photocatalyst, non-metallic oxo acid salts have the advantages of stable structure, good crystallinity, low electron-hole recombination rate, small photocorrosion, and large induction effect. They are a type of photocatalyst with relatively great potential. BiPO 4 It is a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/18B01J35/02B01J37/03C02F1/32
Inventor 朱永法朱艳艳刘艳芳吕艳辉
Owner TSINGHUA UNIV
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