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Cu2O-TiO2/g-C3N4 ternary complex and preparation and application method thereof

A ternary compound, cu2o-tio2 technology, applied in the field of photocatalysis, can solve the problems of low photon quantum efficiency, serious recombination of photogenerated carriers, serious photoerosion, etc., and achieve simple preparation method, good application prospect and high catalytic activity Effect

Active Publication Date: 2015-11-11
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But pure Cu 2 The recombination rate of photogenerated carriers inside O is high, the photon quantum efficiency is low, and the photoerosion is serious
Graphite-like carbon nitride g-C 3 N 4 It is a two-dimensional lamellar polymer semiconductor material with a graphene-like structure. The band gap is about 2.7eV. It can absorb ultraviolet-visible light with a wavelength of less than 470nm in sunlight. It is simple to prepare, low in cost and high in stability. , but as a photocatalyst, there are defects such as serious recombination of photogenerated carriers, weak oxidation ability, and poor mass transfer.

Method used

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  • Cu2O-TiO2/g-C3N4 ternary complex and preparation and application method thereof
  • Cu2O-TiO2/g-C3N4 ternary complex and preparation and application method thereof
  • Cu2O-TiO2/g-C3N4 ternary complex and preparation and application method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] 40%Cu 2 O-30%TiO 2 / 30%g-C 3 N 4 Preparation of:

[0027] Weigh 10g of urea and add 10mL of deionized water, and weigh 0.44g of TiO after dissolving 2 (20–30nm, Degussa product, composed of 80% anatase and 20% rutile TiO 2Composition) was added therein and ultrasonicated for 30min. Then, the water was evaporated to dryness in a water bath at 60° C., and dried in a vacuum oven at 60° C. for 10 h. Put it into a 50mL porcelain crucible after being ground into powder, and calcinate at 530°C for 2h at a heating rate of 5°C / min in a muffle furnace to obtain TiO 2 / g -C 3 N 4 binary complex.

[0028] 0.3328gCu(Ac) 2 ·H 2 O was dissolved in 50 mL of absolute ethanol, stirred for 30 min, and 0.18 g of TiO prepared above was added 2 / g -C 3 N 4 Binary complex, ultrasonic 30min, then slowly drop 50mL aqueous solution containing 0.9g glucose, and stir for 30min. Slowly raise the temperature to 40°C within 40min and add dropwise 60mL solution containing 0.72g NaOH (so...

Embodiment 2

[0033] Change the consumption of starting material by the method for embodiment 1 and prepare 30% Cu 2 O-40%TiO 2 / 30%g-C 3 N 4 catalyst of light.

[0034] The evaluation method of the photocatalytic activity of the catalyst is the same as in Example 1.

[0035] Rhodamine B was completely degraded within 5 minutes of visible light irradiation.

Embodiment 3

[0037] Change the consumption of starting material by the method for embodiment 1 and prepare 30% Cu 2 O-30%TiO 2 / 40%g-C 3 N 4 catalyst of light.

[0038] The evaluation method of the photocatalytic activity of the catalyst is the same as in Example 1.

[0039] Rhodamine B was completely degraded within 5 minutes of visible light irradiation.

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Abstract

The invention discloses a Cu2O-TiO2 / g-C3N4 ternary complex and a preparation and application method thereof. The preparation method comprises the steps that firstly, urea and TiO2 are mixed through a simple physical method, water is added to the mixture, the mixture is dried by distillation, calcination is conducted, and then a binary complex of TiO2 / g-C3N4 is obtained; secondly, by means of sediment and reduction processes, the Cu2O-TiO2 / g-C3N4 ternary complex is prepared. The preparation method is simple, cost is low, and industrial production is facilitated. The prepared ternary complex serves as a visible-light-driven photocatalyst which has high catalytic activity in the visible region, the catalytic efficiency is high, and various organic pollutants in a solution can be degraded instantly; the prepared ternary complex can also serve as a visible-light-driven photocatalyst which is applied to hydrogen preparing of photocatalytic water splitting, degrading of volatile organic pollutants in air and the like, and very good application prospects are achieved.

Description

technical field [0001] The invention relates to a visible light responsive Cu 2 O-TiO 2 / g -C 3 N 4 The ternary compound and its preparation and application method belong to the technical field of photocatalysis. Background technique [0002] As an abundant renewable clean energy, the effective use of solar energy is considered to be one of the most potential ways to solve the three major problems of energy shortage, environmental pollution and greenhouse effect, which are becoming more and more serious in the world today. The key to the effective utilization of solar energy is the availability of light energy conversion materials with excellent performance. [0003] In the past two decades, solving the problem of environmental pollution through photocatalytic technology has attracted widespread attention. Nano n-type semiconductor material TiO 2 Due to its advantages of non-toxicity, low price, good photocatalytic activity and stability, it has become the photocatalys...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24
Inventor 钱东王喜鹏李亚萍闵紫嫣邓渺
Owner CENT SOUTH UNIV
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