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Method for synthesizing PbTio3/RGO composite material through photocatalysis

A composite material and photocatalytic technology, applied in the field of photocatalytic synthesis of PbTiO3/RGO composite materials, can solve the problems of low sensitivity and complicated operation, and achieve the effects of high sensitivity, simple synthesis method and improved catalytic ability.

Active Publication Date: 2019-01-22
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, there are few detection methods for pyrrole content in the world. The gas chromatography and chemiluminescence methods reported in the literature are complicated to operate and have low sensitivity. Therefore, it is necessary to develop an efficient and simple method for the detection of pyrrole.

Method used

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  • Method for synthesizing PbTio3/RGO composite material through photocatalysis
  • Method for synthesizing PbTio3/RGO composite material through photocatalysis
  • Method for synthesizing PbTio3/RGO composite material through photocatalysis

Examples

Experimental program
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Effect test

Embodiment 1

[0033] A photocatalytic synthesis of PbTiO 3 The method of / RGO composite material, its specific steps are:

[0034] 1) Combine graphene oxide (GO) and nano-PbTiO 3 The suspensions were ultrasonically dispersed, and after they were mixed and ultrasonicated again, under the condition of nitrogen protection and stirring, the PbTiO 3 As a photocatalyst, it is irradiated with ultraviolet-visible light for 60 minutes to carry out photocatalytic reduction reaction, so that graphene oxide can be photoreduced to graphene (RGO) and a mixed suspension can be obtained;

[0035] 2) The mixed suspension prepared in step 1) is subjected to solid-liquid separation, and the obtained solid is washed with ultrapure water and ethanol, and dried to obtain PbTiO bonded by Ti-O-C bonds 3 / RGO Composite.

[0036] 1. PbTiO 3 Characterization of / RGO composites:

[0037] (1) To identify the effective photoreduction of GO, UV-Vis spectrophotometer and Raman spectroscopy were used for characterizat...

Embodiment 2

[0051] A photocatalytic synthesis of PbTiO 3 The method of / RGO composite material, its specific steps are:

[0052] 1) Graphene oxide (GO) and nano-PbTiO with L-type morphology and {110} crystal plane group as the main exposed surface 3 Suspensions were ultrasonically dispersed to disperse graphene oxide (GO) and PbTiO 3 The solvents are all ultrapure water and isopropanol mixed solution with a volume ratio of 3:1, wherein isopropanol is used as a photogenerated hole capture agent, and it is mixed with a volume ratio of 1:5 and ultrasonicated again, and then the , under stirring conditions, with PbTiO 3 As a photocatalyst, it is irradiated with ultraviolet-visible light for 40 minutes to carry out photocatalytic reduction reaction, so that graphene oxide can be photoreduced to graphene (RGO) and a mixed suspension can be obtained;

[0053] 2) Centrifuge the mixed suspension prepared in step 1) between solid and liquid at a speed of 10,000 r / min, wash the obtained solid wit...

Embodiment 3

[0055] A photocatalytic synthesis of PbTiO 3 The method of / RGO composite material, its specific steps are:

[0056] 1) Graphene oxide (GO) and nano-PbTiO with L-type morphology and {110} crystal plane group as the main exposed surface 3 Suspensions were ultrasonically dispersed to disperse graphene oxide (GO) and PbTiO 3 The solvents are all mixed solutions of ultrapure water and isopropanol with a volume ratio of 2.5:1, in which isopropanol is used as a photogenerated hole capture agent, graphene oxide (GO) and PbTiO 3 The concentrations of the suspensions were 0.5mg / mL and 0.925mg / mL respectively, and graphene oxide (GO) and PbTiO 3 The volume ratio of the suspension was mixed at 1:6. After ultrasonic treatment again, under the condition of nitrogen protection and stirring (nitrogen was introduced during the stirring process, and the stirring speed was 800r / min), the PbTiO 3 As a photocatalyst, it is irradiated with ultraviolet-visible light for 80 minutes. The ultraviol...

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Abstract

The invention discloses a method for synthesizing a PbTio3 / RGO composite material through photocatalysis, PbTio3 is used as a photocatalyst, and under the protection of nitrogen and ultraviolet light-visible light irradiation, graphene oxide (GO) is reduced into graphene (RGO) through photocatalysis to form the PbTio3 / RGO nano composite material which is combined by a Ti-O-C bond to provide an electron rapid transfer channel. The invention also discloses a PbTio3 / RGO / GCE modified electrode and application of the PbTio3 / RGO / GCE modified electrode in a high-sensitivity electrochemical detectionmethod for pyrrole. The synthesis method disclosed by the invention is simple, raw materials are easy to obtain, the price is low, the method has relatively high practical value, and the obtained nanocomposite material is good in electrical conductivity, high in catalytic performance and good in stability, and can be used for preparing the PbTio3 / RGO / GCE modified electrode for high-sensitivity electrochemical detection of pyrrole.

Description

technical field [0001] The invention relates to the technical field of preparation of nano functional materials, in particular to a photocatalytic synthesis of PbTiO 3 / RGO composite approach. Background technique [0002] Photocatalytic synthesis has attracted the attention of more and more scientific researchers. Light energy has the advantages of cleanness, harmlessness, and wide sources. It is an ideal green energy source in chemical synthesis, and has the advantages of mild reaction conditions and flexible and controllable operating environment. . Photocatalytic synthesis methods can be used to prepare compounds with new C-C bond modification groups, and have begun to be applied in organic synthesis reactions, especially in the development of pharmaceuticals, fine chemicals and advanced materials. According to literature reports, compounds such as benzophosphoric acid oxides, aromatic ketones, and tris-2,2'-bipyridyl-ruthenium (II) have been synthesized using photocat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/14H01B1/04H01B1/08G01N27/26
CPCH01B1/04H01B1/08G01N27/26B01J23/14B01J35/39
Inventor 潘海波彭琦谢文强应美慧许远杰李超超
Owner FUZHOU UNIV
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