Carbon shell-coated lead molybdate nanocrystal and preparation method thereof

A nanocrystal, lead molybdate technology, applied in nanotechnology, nanotechnology, nanotechnology and other directions for materials and surface science, can solve the problems of affecting the photocatalytic efficiency, reducing the conductivity of the material, and the complexity of the process. Separation and transfer, low cost, high purity effect

Inactive Publication Date: 2015-11-04
CAPITAL NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the combination of semiconductor and semiconductor reduces the conductivity of the material and affects its photocatalytic efficiency; and in the preparation process, there are problems such as complex process and high cost.

Method used

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  • Carbon shell-coated lead molybdate nanocrystal and preparation method thereof
  • Carbon shell-coated lead molybdate nanocrystal and preparation method thereof
  • Carbon shell-coated lead molybdate nanocrystal and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Embodiment 1: Synthesis of lead molybdate nanocrystals coated with 2 nanometer carbon shells

[0025] First, lead acetate trihydrate (75.9 mg) and ammonium molybdate (35.3 mg) were added to a Teflon liner with a volume of 20 mL at room temperature, followed by 12.0 mL of deionized water with a pipette Into a Teflon liner, the solution obtained above was placed on a magnetic stirrer and stirred for 10 min.

[0026] 105.0 mg of citric acid were added to the above solution, and the solution obtained in the above reaction liner was stirred for 5 minutes on a magnetic stirrer.

[0027] Next, put the reaction liner containing the precursor solution into the stainless steel shell of the reaction kettle, tighten the lid of the kettle, and then put the reaction kettle into a 200-degree electric blast drying oven and keep it for 1 hour.

[0028] After the reaction, cool the removed reactor to room temperature, transfer the solution in the reaction liner to a 10ml centrifuge tube...

Embodiment 2

[0030] Example 2: Lead molybdate nanocrystals coated with 5 nanometer carbon shells

[0031] Except for adding 210.0 mg of citric acid, the same method as in Example 1 was used to prepare lead molybdate nanocrystals coated with 5 nanometer carbon shells.

[0032] figure 1 Photo 2 is a transmission electron micrograph of the final product prepared in this embodiment, which shows that the prepared length and width are about 50 to 100 nanometers and 20 to 50 nanometers; figure 2 Curve 3 among them is the X-ray powder diffraction pattern of the final product prepared in this embodiment, as can be seen from the figure, the crystallinity of the product synthesized under hydrothermal conditions is high; image 3 Photo 3 in is the high-resolution electron micrograph of the final product prepared in this embodiment; Figure 4 Curve 3 is the Raman spectrum of the final product prepared in this example. In this Raman spectrum, there are absorption bands D band and G band, and its posi...

Embodiment 3

[0033] Example 3: Lead molybdate nanocrystals coated with 8 nanometer carbon shells

[0034] Except that 1050 mg of citric acid was added, lead molybdate nanocrystals coated with 8 nanometer carbon shells were prepared according to the same method as in Example 1.

[0035] figure 1 Photo 3 is a transmission electron microscope photo of the final product prepared in this embodiment, which shows that the prepared length and width are about 50 to 100 nanometers and 20 to 50 nanometers; figure 2 Curve 4 among them is the X-ray powder diffraction pattern of the final product prepared in this embodiment, as can be seen from the figure, the crystallinity of the product synthesized under hydrothermal conditions is high; image 3 Photo 4 in is the high-resolution electron micrograph of the final product prepared in this embodiment; Figure 4 Curve 4 is the Raman spectrogram of the final product prepared in this example. In this Raman spectrum, there are absorption bands D band and G...

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Abstract

The invention relates to a carbon shell-coated lead molybdate nanocrystal and its preparation method. Citric acid is used to control synthesis of lead molybdate nanometer materials with different carbon shell thicknesses. Specifically, the preparation method is simple and novel and has strong controllability. The synthesized carbon layer-coated lead molybdate composite nanocrystal has high purity, and length and width of the nanocrystal are about 100 nm and 50 nm. In addition, the carbon shell coated outside the obtained lead molybdate composite material is more beneficial to separation and transfer of electrons. The carbon shell-coated lead molybdate nanocrystal is used as a cathode material for photoelectrocatalytic water-splitting, and stability and catalytic efficiency of the material also can be enhanced. The invention accords with researches on the latest clean energy and sustainable energy sources.

Description

technical field [0001] The present invention relates to the field of material synthesis, in particular to a carbon shell-coated semiconductor nanomaterial and its synthesis method and the application of the carbon shell-coated semiconductor nanomaterial in the field of hydrogen energy, more specifically to the application of Citric acid is used to control the synthesis of lead molybdate nanomaterials with different carbon shell thicknesses. In addition, it also involves the application of the prepared lead molybdate and its carbon-coated lead molybdate nanomaterials in photocatalytic water splitting. Background technique [0002] Hydrogen is a clean, non-polluting new energy source that is expected to replace fossil fuels, meet global energy demand, and alleviate the energy crisis. At present, the use of sunlight for photocatalytic water splitting to produce hydrogen has the advantages of environmental protection, energy saving, and sustainability, and has become a hot spot ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G39/00C01B31/02B82Y30/00B82Y40/00
Inventor 田洋王立刚
Owner CAPITAL NORMAL UNIVERSITY
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