Graphite loaded tin dioxide electrode and preparation method

A tin dioxide and electrode technology, which is applied in chemical instruments and methods, liquid chemical plating, water/sludge/sewage treatment, etc., can solve problems such as hindering application and poor conductivity, and achieve improved structure and properties, and improved Electrode performance, effect of large free space

Inactive Publication Date: 2018-02-02
SHANGHAI BODAN ENVIRONMENTAL ENG TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But SnO 2 Some of its own properties, such as poor conductivity, hinder its further application

Method used

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  • Graphite loaded tin dioxide electrode and preparation method
  • Graphite loaded tin dioxide electrode and preparation method

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Experimental program
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Embodiment 1

[0028] A graphite-supported tin dioxide electrode and a preparation method thereof, specifically comprising the following steps:

[0029] A. Graphite sheets (fixed carbon content > 99%) of 10cm × 10cm are used in turn with 100 # , 300 # and 500 # Grinding with sandpaper, removing the surface inert layer, making the surface of the substrate smooth, then ultrasonically cleaning in distilled water and acetone for 20 minutes, then cleaning twice with distilled water, cleaning and drying; immerse the cleaned graphite sheet in aqua regia, boil 1h, carry out the oxygen termination treatment, wait for the aqua regia to cool naturally, take out the graphite sheet and wash it twice with distilled water, dry it after cleaning; then place the graphite sheet in the muffle furnace, in the carbon dioxide atmosphere, use the temperature program to carry out Heat treatment, the program temperature is 1°C / min, the hole expansion heat treatment temperature is 600°C, and the heat treatment time...

Embodiment 2

[0036] A graphite-supported tin dioxide electrode and a preparation method thereof, specifically comprising the following steps:

[0037] A. Graphite sheets (fixed carbon content > 99%) of 10cm × 10cm are used in turn with 100 # , 300 # and 500 # Grinding with sandpaper, removing the inert layer on the surface, making the surface of the substrate smooth, then ultrasonically cleaning in distilled water and acetone for 20 minutes, washing twice with distilled water, and drying after cleaning; soaking the cleaned graphite sheet in 65% nitric acid for 24 hours , carry out oxygen termination treatment, take out the graphite sheet and wash it twice with distilled water, dry it after cleaning; then place the graphite sheet in a muffle furnace, and heat-treat it in a carbon dioxide atmosphere by using a temperature program at a temperature of 5°C / min, the hole expansion heat treatment temperature is 800°C, and the heat treatment time is 5h to obtain a spare graphite sheet;

[0038...

experiment example

[0041] Adopt the SnO that embodiment 1 prepares 2 -Mn / Graphite Electrode Electrocatalytic Oxidation Degradation of High Concentration Pesticide Wastewater. The electrocatalytic degradation is carried out in a single-cell circular electrochemical reaction cell, and a cup with circulating water is added to keep the temperature of the reaction system at room temperature. The prepared electrode is used as the anode, the Ti plate is used as the counter electrode, and the electrode area is 100 cm 2 , electrochemical degradation using constant current electrolysis, constant current density 100mA cm -2 . COD containing 3% NaCl electrolyte cr The value is 750mg / L. The treated water after electroplating is a wastewater sample, and the reaction volume is 500ml. Samples are taken at different times during the degradation reaction for analysis. Sampled COD cr The value is determined by potassium dichromate standard method (GB11914-89).

[0042] The results showed that the removal rat...

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Abstract

The invention discloses a graphite loaded tin dioxide electrode and a preparation method. The preparation method comprises the following steps of (1) grinding a graphite sheet with abrasive paper so as to remove a surface inert layer, and then performing oxygen terminal treatment; putting a graphite electrode obtained after treatment in a muffle furnace, and performing heat treatment by adopting temperature programming in carbon dioxide atmosphere, so that a standby graphite sheet is obtained; (2) preparing sol-gel deposition liquid; and (3) repeating impregnation-deposition, drying and calcining processes for many times, so that an SnO2-Mn / Graphite electrode is prepared. According to the preparation method, the surface structure of an SnO2 coating is reformed by utilizing manganese as a metal element, so that an Mn doped SnO2 modified layer with small particle size and compact arrangement is obtained, and the electrode performance is improved; compared with the graphite sheet which isnot modified, the obtained electrode has high oxygen evolution potential and electrocatalytic activity, and the stability of the graphite electrode can be effectively kept.

Description

technical field [0001] The invention relates to the technical field of organic wastewater treatment, in particular to a graphite-loaded tin dioxide electrode and a preparation method. Background technique [0002] Electrochemical Advanced Oxidation (EAOPs) is a method of using electrons as reaction reagents to efficiently and greenly treat environmental pollutants. It has been widely used by many researchers in the research on the degradation of organic wastewater. EAOPs are essentially a heterogeneous electron transfer reaction that occurs at the solid-liquid (electrode / electrolyte) interface, which makes the electrode the key to the entire reaction system. Many studies have pointed out that the anode suitable for electrochemical oxidation treatment of organic pollutants in wastewater should have good electrical conductivity, electrochemical stability, high oxygen evolution potential and good catalytic degradation activity for organic matter. At the same time the costs are...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C18/12C02F1/461C02F101/30
CPCC02F1/46109C02F1/4672C02F2001/46142C02F2101/306C23C18/1216C23C18/1254
Inventor 范佳奇王凯武广
Owner SHANGHAI BODAN ENVIRONMENTAL ENG TECH
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