CATALYTIC ACTIVITY OF THE COMPOSITION SrBi4-уO7-z / ½у(BiO)2СО3 IN DECOMPOSITION OF METHYLENE BLUE DYE
Annotation
Results of studying the properties of the photo-catalytically active compositions SrBi4-уO7-z / ½у(BiO)2СО3, where y=1,2… 1,7, obtained by pyrolytic synthesis from organic precursor com-plexes of strontium and bismuth with sorbitol, are presented. The synthesized powder materials are shown to absorb light of the visible range up to 500 nm due to the presence of the narrow-band semiconductor SrBi4O7. The presence of the wide-band gap semiconductor (BiO)2СО3 provides effective separation of electron-hole pairs. The diffuse reflection spectra of the compositions differ from similar spectra of the mechanical mixture of these semiconductor phases of the same composition, which suggests the presence of a heterostructure in the semiconductor system. The catalytic particles synthesized at a temperature of 500 °C and containing 73 wt. % of SrBi4 уO7-z and 27 wt. % of (BiO)2СО3, have the greatest activity in me-thylene blue photo-decomposition. The possibility of controlling the optical properties and photocatalytic activity of the composition due to the joint formation of the phase of strontium bismuthate and the phase of bismuth oxycarbonate is demonstrated.
Keywords
Постоянный URL
Articles in current issue
- SYNTHESIS OF ROBUST CONTROLLERS FOR AN OBJECT WITH DELAY USING TRADITIONAL CONTROL LAWS
- PROCESS ANALYSIS OF DATA FLOW PRIORITY MANAGEMENT IN SOFTWARE SYSTEMS
- USING THE EXTENDED KALMAN FILTER IN NONSTATIONARY THERMAL MEASUREMENT WHEN SOLVING INVERSE HEAT TRANSFER PROBLEMS
- TECHNOLOGY OF FORMATION OF INERTIA MOMENTS OF SPHERICAL ROTORS FROM ANISOTROPIC MATERIALS
- ORGANIZATION OF CYBER-PHYSICAL PRODUCTION SYSTEMS USING BLOCKCHAIN AND SMART-CONTRACTS TECHNOLOGIES
- ANALYSIS OF VARIANCE IN THE STUDY OF PROBLEMS IN SMALL SCALE PRODUCTION OF TWO-STEP FLOATED GYROSCOPES
- DEPENDENCE OF ACTIVITY OF PHOTOCATALYSTS BASED ON CALCIUM BISMUTHATES ON INITIAL CONCENTRATION OF THE POLLUTANT
- USING THE LASER CONОSCOPY METHOD FOR THE ANALYSIS AND EVALUATION OF OPTICAL QUALITY OF LITHIUM NIOBATE CRYSTALS
- STUDY OF INVERSE MAGNETOELECTRIC EFFECT IN FeBO3-BASED COMPOSITES USING OPTICAL METHODS
- DIAGNOSTICS OF PHYSIOLOGICAL PROCESSES IN LIVING TISSUES BY THE METHOD OF OPTICAL VISUALIZATION OF BLOOD PULSATION
- SYSTEM OF OPTICAL PROBE POSITIONING FOR DIAGNOSING INTERNAL SURFACE OF HOLLOW REINFORCED CONCRETE STRUCTURES
- PHOTOCATALYTIC ACTIVITY MEASURING OF BISMUTH COATINGS ON THE CERAMIC CARRIER IN AUTOMATIC MODE
- USING THE SOLC OPTICAL FILTER FOR DETERMINATION OF CRYSTALLINE PLATES THICKNESS
- FIBER-OPTIC INTERFEROMETRIC ACCELEROMETER FOR MONITORING OF NATURAL AND MAN-MADE OBJECTS