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A kind of preparation method of Rubik's cube soft bismuth ore bismuth phosphate powder

A technology of soft bismuth ore and bismuth phosphate, applied in chemical instruments and methods, phosphorus compounds, inorganic chemistry, etc., can solve the problems of difficult synthesis of preparation methods, and achieve the effect of novel crystal shape, simple device and regular shape

Inactive Publication Date: 2017-03-08
CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to its special Bi, P, O stoichiometry ratio, the replication and transplantation of monoclinic BiPO 4 The preparation method is difficult to synthesize Bi 12 P 0.86 o 20.14
Currently Bi 12 P 0.86 o 20.14 The synthesis method adopted is a high-temperature solid-phase method. After the raw materials are prepared according to the stoichiometric ratio, the synthesis is realized through a high-temperature reaction, and Bi with a regular Rubik’s cube shape is synthesized by a hydrothermal method. 12 P 0.86 o 20.14 Powder has not been reported yet

Method used

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  • A kind of preparation method of Rubik's cube soft bismuth ore bismuth phosphate powder
  • A kind of preparation method of Rubik's cube soft bismuth ore bismuth phosphate powder
  • A kind of preparation method of Rubik's cube soft bismuth ore bismuth phosphate powder

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Step 1: Bi(NO 3 ) 3 ·5H 2 O and NaH 2 PO 4 2H 2 O was added to 2mol / L HNO at a volume ratio of 1:1 3 solution and distilled water, magnetically stirred for 50min to obtain Bi(NO 3 ) 3 of nitric acid solution and NaH 2 PO 4 aqueous solution; the NaH 2 PO 4 aqueous solution was added to the Bi(NO 3 ) 3 nitric acid solution, and the mixed solution was magnetically stirred for 50min to obtain a white suspension; the Bi(NO 3 ) 3 and NaH 2 PO 4 The concentration is 0.16mol / L;

[0034] Step 2: Add 6 mol / L NaOH solution to the above white suspension and then magnetically stir for 50 min. The volume ratio of NaOH solution and white suspension is 30:50 to obtain a hydrothermal reaction precursor.

[0035] Step 3: Transfer the precursor liquid into the hydrothermal reaction kettle, the filling rate of the hydrothermal reaction kettle is 80%, put it into a constant temperature blast drying oven, keep it at 130°C for 10 hours, and then stop the reaction;

[0036] S...

Embodiment 2

[0038] Step 1: Bi(NO 3 ) 3 ·5H 2 O and NaH 2 PO 4 2H 2 O was added to 2.2mol / L HNO with a volume ratio of 1:1 3 solution and distilled water, magnetically stirred for 45min to obtain Bi(NO 3 ) 3 of nitric acid solution and NaH 2 PO 4 aqueous solution; the NaH 2 PO 4 Aqueous solution was added to Bi(NO 3 ) 3 nitric acid solution, and the mixed solution was magnetically stirred for 45min to obtain a white suspension; the Bi(NO 3 ) 3 and NaH 2 PO 4 The concentrations are 0.16mol / L and 0.08mol / L respectively;

[0039] Step 2: Add 6.5 mol / L NaOH solution to the above white suspension and then magnetically stir for 45 minutes. The volume ratio of NaOH solution and white suspension is 28:52 to obtain the hydrothermal reaction precursor.

[0040] Step 3: transfer the precursor solution into a hydrothermal reaction kettle, the filling rate of the hydrothermal reaction kettle is 78%, put it into a constant temperature blast drying oven, keep it at 125°C for 10 hours, an...

Embodiment 3

[0043] Step 1: Bi(NO 3 ) 3 ·5H 2 O and NaH 2 PO 4 2H 2 O was added to 2.4mol / L HNO with a volume ratio of 1:1 3 solution and distilled water, magnetically stirred for 40min to obtain Bi(NO 3 ) 3 of nitric acid solution and NaH 2 PO 4 aqueous solution; the NaH 2 PO 4 Aqueous solution was added to Bi(NO 3 ) 3 nitric acid solution, and the mixed solution was magnetically stirred for 40min to obtain a white suspension; the Bi(NO 3 ) 3 and NaH 2 PO 4 The concentrations are 0.24mol / L and 0.08mol / L respectively;

[0044] Step 2: Add 7mol / L NaOH solution to the above white suspension and then magnetically stir for 40min. The volume ratio of NaOH solution and white suspension is 26:54 to obtain the hydrothermal reaction precursor.

[0045] Step 3: transfer the precursor liquid into the hydrothermal reaction kettle, the filling rate of the hydrothermal reaction kettle is 76%, put it into a constant temperature blast drying oven, keep it at 135°C for 9 hours, and then st...

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Abstract

The invention provides a preparing method for Rubik-cube-shaped sillenite bismuth phosphate powder. According to the method, a NaH2PO4 solution of a certain molar ratio is added into a Bi(NO3)3 nitric acid solution to obtain white turbid liquid; an alkali metal hydroxide solution of a certain amount is added into the white turbid liquid, and magnetically stirred until the turbid liquid turns yellow; the obtained yellow turbid liquid is transferred into a hydrothermal reaction kettle to be subjected to a reaction, after the reaction is completed, cooling is carried out, and yellow precipitate in the reaction kettle is taken out, washed and dried to obtain the Rubik-cube-shaped sillenite bismuth phosphate Bi12P0.86O20.14 powder. The method has the advantages that a device is simple, temperature is low (120 DEG C-140 DEG C), and environmental protection is achieved (the synthetic reaction is carried out in a closed system); the powder is synthesized at a time in a hydrothermal mode, high-temperature calcinations is not needed, the synthesized powder is high in purity and crystallinity, and regular in morphology, and the preparing method is simple in process, high in efficiency, low in energy consumption and low in cost.

Description

technical field [0001] The invention belongs to the field of functional materials, in particular to a Rubik's Cube-shaped Bi 12 P 0.86 o 20.14 Powder preparation method. Background technique [0002] The use of photocatalytic technology for sewage treatment can effectively degrade organic matter and reduce heavy metal ions. Moreover, the technology requires low energy consumption, simple operation, mild reaction conditions, and no secondary pollution. Therefore, photocatalysis is a promising technology for environmental governance. [0003] Bismuth phosphate photocatalyst research focuses on monoclinic phase bismuth phosphate (chemical formula BiPO 4 ), its preparation methods include high-temperature solid phase method, hydrothermal method, solvothermal method, microwave hydrothermal method and microemulsion method, liquid phase precipitation method, sol-gel method, ultrasonic synthesis method, etc. However, due to the wide bandgap (3.85eV), BiPO 4 Photocatalytic act...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B25/37
CPCC01B25/37C01P2002/72C01P2002/84C01P2004/03C01P2004/38
Inventor 李海斌张健刘希陈曙光付圣豪李富进刘鹏黄国游
Owner CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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