APPLICATION OF ELECTRODES BASED ON TI-AL-C MAX-PHASE AT ELECTROCHEMICAL DESTRUCTION OF HARD-TO-OXIDIZE ORGANIC MATERIALS
Rubrics: 2. CHEMICAL TECHNOLOGY
Authors:
1.
Kazanskiy nacional'nyy issledovatel'skiy tehnologicheskiy universitet
2.
Kazanskiy nacional'nyy issledovatel'skiy tehnologicheskiy universitet
3.
Institut strukturnoy makrokinetiki i problem materialovedeniya im. A.G. Merzhanova RAN
4.
Institut strukturnoy makrokinetiki i problem materialovedeniya im. A.G. Merzhanova RAN
5.
Kazan National Research Technological University
Kazan, Russian Federation
Kazan, Russian Federation
6.
KNITU
Type:
Article
Pages:
from 124
to 128
Status:
In work
Language:
Russian
Keywords:
ELECTROCHEMICAL DESTRUCTION, HARD-TO-OXIDIZE ORGANIC COMPOUNDS, PHENOL, ELECTRODE MATERIALS, ELECTROCHEMICAL METHODS OF PURIFICATION, SELF-PROPAGATING HIGH-TEMPERATURE SYNTHESIS (SHS)
Abstract (English):
Approaches based on electrochemical technologies are one of the most promising ways to remove organic pollutants. The advantages of these technologies are noted in the absence of the need for additional reagents, the possibility of controlling the purification processes and relatively low environmental impact. The key aspect of this research is obtaining electrode materials on the basis of MAX-phases of Ti-Al-C system by free SHS-compression method and selection of the most effective materials in relation to the process of electrochemical degradation of hard-to-oxidize organic compounds. The method of free SHS-compression allows the synthesis of materials without supplying additional thermal energy, using the heat released during exothermic reactions, which significantly reduces costs and simplifies the production process. Six samples of electrode materials with specific phase composition and physicochemical properties were obtained during the study. The efficiency of the obtained materials was evaluated by using them as anode in the process of electrochemical degradation of phenol in aqueous model solution. The spectrophotometric method of solution analysis before and after electrolysis, demonstrating the achievement of phenol removal degree of 82,1%, shows the efficiency of using as an anode a sample of material with phase composition TiC, Ti3AlC2, TiAl3. Negative properties of the investigated electrodes - their intergranular destruction under conditions of long-term anodic polarization, except for the electrode made of the material sample with phase composition TiB, Ti, are noted.
Approaches based on electrochemical technologies are one of the most promising ways to remove organic pollutants. The advantages of these technologies are noted in the absence of the need for additional reagents, the possibility of controlling the purification processes and relatively low environmental impact. The key aspect of this research is obtaining electrode materials on the basis of MAX-phases of Ti-Al-C system by free SHS-compression method and selection of the most effective materials in relation to the process of electrochemical degradation of hard-to-oxidize organic compounds. The method of free SHS-compression allows the synthesis of materials without supplying additional thermal energy, using the heat released during exothermic reactions, which significantly reduces costs and simplifies the production process. Six samples of electrode materials with specific phase composition and physicochemical properties were obtained during the study. The efficiency of the obtained materials was evaluated by using them as anode in the process of electrochemical degradation of phenol in aqueous model solution. The spectrophotometric method of solution analysis before and after electrolysis, demonstrating the achievement of phenol removal degree of 82,1%, shows the efficiency of using as an anode a sample of material with phase composition TiC, Ti3AlC2, TiAl3. Negative properties of the investigated electrodes - their intergranular destruction under conditions of long-term anodic polarization, except for the electrode made of the material sample with phase composition TiB, Ti, are noted.
Keywords:
ELECTROCHEMICAL DESTRUCTION, HARD-TO-OXIDIZE ORGANIC COMPOUNDS, PHENOL, ELECTRODE MATERIALS, ELECTROCHEMICAL METHODS OF PURIFICATION, SELF-PROPAGATING HIGH-TEMPERATURE SYNTHESIS (SHS)
ELECTROCHEMICAL DESTRUCTION, HARD-TO-OXIDIZE ORGANIC COMPOUNDS, PHENOL, ELECTRODE MATERIALS, ELECTROCHEMICAL METHODS OF PURIFICATION, SELF-PROPAGATING HIGH-TEMPERATURE SYNTHESIS (SHS)
