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Preparation method of bismuth subcarbonate microflowers and product

A technology of bismuth oxycarbonate and micro-flowers, which is applied in chemical instruments and methods, bismuth compounds, inorganic chemistry, etc., can solve the problems of poor controllability of morphology, disordered flower-like structure, and low crystallinity of bismuth oxycarbonate micro-flowers. , to achieve the effect of easy control, simple preparation process and high crystallinity

Inactive Publication Date: 2014-12-24
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the crystallinity of the bismuth oxycarbonate micro-flowers prepared by this method is not high, the flower-like structure is relatively disordered, and the controllability of the morphology is poor.

Method used

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  • Preparation method of bismuth subcarbonate microflowers and product
  • Preparation method of bismuth subcarbonate microflowers and product
  • Preparation method of bismuth subcarbonate microflowers and product

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] 1) Weigh 8 mmol of tetrabutyl titanate, add it dropwise into deionized water, and control the concentration of tetrabutyl titanate to 1.0 mol / L.

[0027] 2) Weigh 11 mmol of bismuth nitrate pentahydrate, add it into the suspension prepared in step 1), and stir thoroughly.

[0028] 3) Weigh 0.04 mol of potassium hydroxide, add to the suspension solution prepared in step 2), and stir for at least 30 minutes.

[0029] 4) Weigh 28 mmol of ammonium citrate, dissolve it in deionized water, and control the concentration of ammonium citrate to 2.8 mol / L.

[0030] 5) Add the solution prepared in step 4) dropwise to the suspension prepared in step 3) under stirring state, and disperse through sufficient stirring and ultrasonic vibration.

[0031] 6) Add the suspension prepared in step 5) into the liner of the reaction kettle. Use deionized water to adjust its volume to account for 4 / 5 of the inner tank volume of the reactor to obtain a suspension of the reaction precursor. At ...

Embodiment 2

[0034] 1) Weigh 10 mmol of tetrabutyl titanate, add it dropwise to deionized water, and control the concentration of tetrabutyl titanate to 1.0 mol / L.

[0035] 2) Weigh 13 mmol of bismuth nitrate pentahydrate, add it into the suspension prepared in step 1), and stir thoroughly.

[0036] 3) Weigh 0.04 mol of potassium hydroxide, add to the suspension solution prepared in step 2), and stir for at least 30 minutes.

[0037] 4) Weigh 28 mmol of ammonium citrate, dissolve it in deionized water, and control the concentration of ammonium citrate to 2.8 mol / L.

[0038] 5) Add the solution prepared in step 4) dropwise to the suspension prepared in step 3) under stirring state, and disperse through sufficient stirring and ultrasonic vibration.

[0039] 6) Add the suspension prepared in step 5) into the liner of the reaction kettle. Use deionized water to adjust its volume to account for 4 / 5 of the inner tank volume of the reactor to obtain a suspension of the reaction precursor. At t...

Embodiment 3

[0042] 1) Weigh 9 mmol of tetrabutyl titanate, add it dropwise into deionized water, and control the concentration of tetrabutyl titanate to 1.0 mol / L.

[0043] 2) Weigh 12 mmol of bismuth nitrate pentahydrate, add it into the suspension prepared in step 1), and stir thoroughly.

[0044] 3) Weigh 0.04 mol of potassium hydroxide, add to the suspension solution prepared in step 2), and stir for at least 30 minutes.

[0045] 4) Weigh 29 mmol of ammonium citrate, dissolve it in deionized water, and control the concentration of ammonium citrate to 2.9 mol / L.

[0046] 5) Add the solution prepared in step 4) dropwise to the suspension prepared in step 3) under stirring state, and disperse through sufficient stirring and ultrasonic vibration.

[0047] 6) Add the suspension prepared in step 5) into the liner of the reaction kettle. Use deionized water to adjust its volume to account for 4 / 5 of the inner tank volume of the reactor to obtain a suspension of the reaction precursor. At ...

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Abstract

The invention discloses a preparation method of bismuth subcarbonate microflowers. The method comprises the steps that tetrabutyl titanate, bismuth nitrate pentahydrate and water are mixed, so as to obtain suspension liquid, and the molar ratio of bismuth nitrate pentahydrate to tetrabutyl titanate is (11 to 13):(8 to 10); KOH is mixed with the suspension liquid, and then ammonium citrate fluid is dropwise added into the suspension liquid, so as to obtain precursor solution; the KOH concentration in the precursor solution is 0.8 to 1.2 mol / L, the bismuth nitrate pentahydrate concentration is 0.2 to 0.4 mol / L and the ammonium citrate concentration is 0.6 to 0.8 mol / L; the precursor solution is subjected to hydrothermal reaction for 18 to 22 h at 190 to 210 DEG C, and the bismuth subcarbonate microflowers are obtained through after treatment. The bismuth subcarbonate microflowers prepared are formed by staggering two-dimensional nano sheets, the average diameter is 5 to 15 micrometers, and the specific surface area is large. Bismuth subcarbonate has obvious degradation effect on toxic organic pollutants, and has a wide application prospect in terms of environmental management.

Description

technical field [0001] The invention relates to a preparation method of inorganic non-metallic materials, in particular to a preparation method and product of bismuth oxycarbonate micron flowers. Background technique [0002] In recent years, the heterogeneous photocatalytic technology using semiconductor oxides as catalysts has become an ideal environmental pollution control technology, and the application of photohydrolysis hydrogen production has been extensively studied. Among them, titanium dioxide is considered to be the most promising semiconductor photocatalyst due to its chemical and biological inertness, high stability, non-toxicity and low cost. However, two inherent defects of titanium dioxide limit its practical application: (1) TiO 2 The band gap is wide, and it can only be excited by ultraviolet light with a wavelength less than 386.5nm; (2) TiO 2 The electrons and holes generated by photoexcitation are easy to recombine, resulting in extremely low photon qu...

Claims

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Application Information

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IPC IPC(8): C01G29/00
Inventor 徐刚白惠文邓世琪沈鸽韩高荣
Owner ZHEJIANG UNIV
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