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Preparation method for graphite phase carbon nitride/high bismuth oxyiodide heterojunction with up-conversion characteristics and product thereof, and application of product

A technology of graphite phase carbon nitride and conversion characteristics, applied in the field of photocatalytic materials, can solve the problem of low recombination efficiency of photogenerated carriers, achieve excellent electron-hole separation ability, large spectral response range, and simple preparation method Effect

Pending Publication Date: 2020-06-09
SHANGHAI UNIVERSITY OF ELECTRIC POWER
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Heterojunction can reduce the recombination efficiency of photogenerated carriers

Method used

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  • Preparation method for graphite phase carbon nitride/high bismuth oxyiodide heterojunction with up-conversion characteristics and product thereof, and application of product
  • Preparation method for graphite phase carbon nitride/high bismuth oxyiodide heterojunction with up-conversion characteristics and product thereof, and application of product
  • Preparation method for graphite phase carbon nitride/high bismuth oxyiodide heterojunction with up-conversion characteristics and product thereof, and application of product

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] This embodiment provides a method for preparing a graphitic phase carbon nitride / bismuth periodinite heterojunction with up-conversion properties:

[0031] (1) Calcining urea at 550°C for 4h to obtain powdered g-C 3 N 4 , the calcination heating rate is 5°C / min.

[0032] (2) Weigh 3mmol of Bi(NO 3 ) 3 ·5H 2 O was dispersed into 10ml of ethylene glycol, and ultrasonicated to a uniform solution, which was recorded as solution A, wherein the ultrasonic time was 10min, and the ultrasonic frequency was 40KHz.

[0033] (3) Weigh 0.13mmol of Yb(NO 3 ) 3 Dispersed into 5ml of ethylene glycol, ultrasonicated to a uniform solution, which was recorded as solution B, wherein the ultrasonic time was 10min, and the ultrasonic frequency was 40KHz.

[0034] (4) Weigh 2mmol of g-C prepared in (1) 3 N 4 Dispersed into 10ml of ethylene glycol, ultrasonicated to a uniform solution, which was recorded as solution C, wherein the ultrasonic time was 10min, and the ultrasonic frequenc...

Embodiment 2

[0042] This embodiment provides a method for preparing a graphitic phase carbon nitride / bismuth periodinite heterojunction with up-conversion properties:

[0043] (1) Calcining urea at 550°C for 4h to obtain powdered g-C 3 N 4 , the calcination heating rate is 5°C / min.

[0044] (2) Weigh 3mmol of Bi(NO 3 ) 3 ·5H 2 O was dispersed into 10ml of ethylene glycol, and ultrasonicated to a uniform solution, which was recorded as solution A, wherein the ultrasonic time was 5min, and the ultrasonic frequency was 35KHz.

[0045] (3) Weigh 0.13mmol of Yb(NO 3 ) 3 Dispersed into 5ml of ethylene glycol, ultrasonicated to a uniform solution, which was recorded as solution B, wherein the ultrasonic time was 5min, and the ultrasonic frequency was 35KHz.

[0046] (4) Weigh 2mmol of g-C prepared in (1) 3 N 4 Dispersed into 10ml of ethylene glycol, ultrasonicated to a uniform solution, which was recorded as solution C, wherein the ultrasonic time was 5min, and the ultrasonic frequency w...

Embodiment 3

[0052] This embodiment provides a method for preparing a graphitic phase carbon nitride / bismuth periodinite heterojunction with up-conversion properties:

[0053] (1) Calcining urea at 550°C for 4h to obtain powdered g-C 3 N 4 , the calcination heating rate is 5°C / min.

[0054] (2) Weigh 3mmol of Bi(NO 3 ) 3 ·5H 2 O was dispersed into 10ml of ethylene glycol, and ultrasonicated to a uniform solution, which was recorded as solution A, wherein the ultrasonic time was 10min, and the ultrasonic frequency was 35KHz.

[0055] (3) Weigh 0.13mmol of Yb(NO 3 ) 3 Dispersed into 5ml of ethylene glycol, ultrasonicated to a uniform solution, which was recorded as B solution, wherein the ultrasonic time was 10min, and the ultrasonic frequency was 35KHz.

[0056] (4) Weigh 2mmol of g-C prepared in (1) 3 N 4 Dispersed into 10ml of ethylene glycol, ultrasonicated to a uniform solution, which was recorded as solution C, wherein the ultrasonic time was 10min, and the ultrasonic frequenc...

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Abstract

The invention discloses a preparation method of a graphite phase carbon nitride / high bismuth oxyiodide heterojunction with up-conversion characteristics and a product thereof, and application of the product. The preparation method comprises the following steps: respectively dispersing Bi(NO<3>)<3>.5H<2>O, Re(NO<3>)<3>, g-C<3>N<4> and KI into ethylene glycol, carrying out ultrasonic treatment, andrespectively marking the formed solutions as a solution A, a solution B, a solution C and a solution D; adding the solution B into the solution A, carrying out stirring, then adding the solution C, conducting stirring, finally adding the solution D, and conducting uniform stirring to obtain a mixed solution; subjecting the obtained mixed solution to a reaction for 10-12 hours at a temperature of 150-160 DEG C, and drying the obtained product to obtain a precursor g-C<3>N<4> / Re<3+>-BiOI; and calcining the precursor g-C<3>N<4> / Re<3+>-BiOI for 2 to 3 h at a temperature of 450 to 480 DEG C so as to obtain a product g-C<3>N<4> / Re<3+>-Bi<5>O<7>I. The graphite phase carbon nitride / high bismuth oxyiodide heterojunction with the up-conversion characteristics is prepared through two steps includinga solvothermal method and a calcining method, has excellent electron hole separation capability and a large spectral response range, and is wide in application range.

Description

technical field [0001] The invention belongs to the field of photocatalytic materials, and in particular relates to a preparation method, product and application of a graphite phase carbon nitride / bismuth periodyl iodine heterojunction with upconversion characteristics. Background technique [0002] In recent years, environmental pollution and potential energy shortage problems have brought serious problems to human beings. Photocatalytic technology shows great potential in environmental restoration and new energy development. However, the current photocatalysts have low activity, which is mainly reflected in the low utilization rate of sunlight and the high recombination efficiency of photogenerated carriers. Therefore, it is very necessary to develop a photocatalyst with a large photoresponse range and low recombination efficiency of photogenerated carriers. [0003] Graphite-type C3N4 (g-C3N4) has attracted extensive attention from photocatalytic researchers due to its ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24C02F1/30C02F101/20
CPCB01J27/24C02F1/30C02F2305/10C02F2101/20B01J35/39
Inventor 吴江周敏王润王健敏王方军杨鸿宇何平马昕霞陈然
Owner SHANGHAI UNIVERSITY OF ELECTRIC POWER
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