Monoclinic-phase BiVO4/GO (graphene oxide)/RGO (reduced graphene oxide) crystal and preparation method thereof

A monoclinic phase, crystal technology, applied in the direction of single crystal growth, crystal growth, single crystal growth, etc., can solve problems such as no reports, no patents and literature reports, and achieve the effect of good ionic conductivity

Active Publication Date: 2016-08-10
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] So far, the preparation of monoclinic BiVO by sacrificial template method 4 The work on /GO/RGO crystals has not been reported yet,

Method used

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  • Monoclinic-phase BiVO4/GO (graphene oxide)/RGO (reduced graphene oxide) crystal and preparation method thereof
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  • Monoclinic-phase BiVO4/GO (graphene oxide)/RGO (reduced graphene oxide) crystal and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0034] Example 1:

[0035] Step 1. Add 1mmoL Bi(NO 3 ) 3 ·5H 2 O dissolved in 9mL 1mol / L dilute HNO 3 After stirring for 30 minutes, add 3mL oleic acid, 3mL n-heptane and 10mL acetone dropwise at a rate of 2 drops / sec. Stir for 10min, then add 5mL 10mol / L NaOH solution at a rate of 2 drops / sec to form Precursor solution, the precursor solution is stirred at room temperature for 8h to prepare Bi 2 O 3 Settling, washing and drying the precipitate for use;

[0036] Step 2, add 115mL of concentrated H 2 SO 4 Place it in an Erlenmeyer flask, place the Erlenmeyer flask in a low-temperature thermostat, reduce the temperature to 0°C and keep the temperature constant for 35min; then under agitation, at the speed of 0.33g / min, 0.5g / min and 1.5g / min Add 5g graphite, 5g sodium nitrate and 15g potassium permanganate successively, and stir evenly at 0℃ to obtain a mixture; then heat the mixture to 25℃, stir and keep it for 3h; then heat the mixture to 35℃ and continue stirring And keep for 2h; ...

Example Embodiment

[0043] Example 2:

[0044] Step 1. Add 1mmoL Bi(NO 3 ) 3 ·5H 2 O dissolved in 9mL 1mol / L dilute HNO 3 After stirring for 30 minutes, add 3mL oleic acid, 3mL n-heptane and 10mL acetone drop by drop at a rate of 2 drops / sec. Stir for 10min, then add 5mL 10mol / L NaOH solution at a rate of 2 drops / sec to form Precursor solution, the precursor solution is stirred at room temperature for 8.5h to prepare Bi 2 O 3 Settling, washing and drying the precipitate for use;

[0045] Step 2, add 115mL of concentrated H 2 SO 4 Place it in an Erlenmeyer flask, place the Erlenmeyer flask in a low-temperature thermostat, reduce the temperature to 0°C and keep the temperature constant for 35min; then under agitation, at the speed of 0.33g / min, 0.5g / min and 1.5g / min respectively Add 5g graphite, 5g sodium nitrate and 15g potassium permanganate successively, and stir evenly at 0℃ to obtain a mixture; then heat the mixture to 25℃, stir and keep it for 3h; then heat the mixture to 35℃ and continue stirring...

Example Embodiment

[0052] Example 3:

[0053] Step 1. Add 1mmoL Bi(NO 3 ) 3 ·5H 2 O dissolved in 9mL 1mol / L dilute HNO 3 After stirring for 30min, add 3mL oleic acid, 3mL n-heptane and 10mL acetone dropwise at a rate of 2 drops / sec. Stir for 10min, then add 5mL10mol / L NaOH solution at a rate of 2 drops / sec to form a precursor The precursor solution was stirred at room temperature for 7.5h to prepare Bi 2 O 3 Settling, washing and drying the precipitate for use;

[0054] Step 2, add 115mL of concentrated H 2 SO 4 Place it in an Erlenmeyer flask, place the Erlenmeyer flask in a low-temperature thermostat, reduce the temperature to 0°C and keep the temperature constant for 35min; then under agitation, at the speed of 0.33g / min, 0.5g / min and 1.5g / min respectively Add 5g graphite, 5g sodium nitrate and 15g potassium permanganate successively, and stir evenly at 0℃ to obtain a mixture; then heat the mixture to 25℃, stir and keep it for 3h; then heat the mixture to 35℃ and continue stirring And keep for 2h...

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Abstract

The invention discloses a monoclinic-phase BiVO4/GO (graphene oxide)/RGO (reduced graphene oxide) crystal and a preparation method thereof. The preparation method comprises the following steps: by using Bi(NO3)3.5H2O as a Bi source, sequentially adding oleic acid, n-heptane and acetone into the Bi(NO3)3.5H2O, and stirring at low temperature for 6-10 hours to synthesize a fibrous Bi2O3 template; and respectively dissolving the prepared Bi2O3 template and NH4VO3 in ethanol and a water solution, mixing the two solutions, adding the dispersed GO suspension to form a precursor solution, and carrying out hydrothermal reaction on the precursor solution at 180 DEG C to obtain the BiVO4/GO/RGO crystal. The BiVO4 is the monocline phase; the space structure group is I2/a(15); and as the hydrothermal time is prolonged, the crystal is developed more completely and has better structural stability. In the hydrothermal reaction process, the GO is partially reduced; and as the time is prolonged, the reduction degree of the GO increased. The method is simple to operate and stable in technique, and is mature and feasible.

Description

technical field [0001] The invention belongs to the field of functional materials and relates to a monoclinic phase BiVO 4 / GO / RGO crystal and its preparation method. Background technique [0002] BiVO 4 It is a non-toxic, chemically and biologically stable semiconductor material with visible light responsiveness. In recent years, it has been gradually used in photocatalytic degradation of organic pollutants, photoelectric sensitivity, photoinduced luminescence etc. Thanks to BiVO 4 The surface has disadvantages such as weak adsorption capacity, easy recombination of photogenerated electrons and holes, and difficult separation. Researchers have done a lot of research work on its modification and surface modification. Common modification methods include doping of metal ions and non-metal ions, noble metal deposition, and composite heterojunction. Among them, the composite heterojunction has been widely studied because it can achieve the purpose of effectively separating ...

Claims

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Application Information

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IPC IPC(8): C30B7/10C30B29/10
CPCC30B7/10C30B29/10
Inventor 谈国强赵程程夏傲任慧君
Owner SHAANXI UNIV OF SCI & TECH
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