Comparison detection method for nano photocatalytic activity capability

• Main Author: SUN ZHENYA
• Format: Patent
• Language: English
• Published: 09.12.2015
• Subjects: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MEASURING; PHYSICS; TESTING

The invention discloses a comparison detection method for a nano photocatalytic activity capability. The method comprises the steps of adding a neutral silver nitrate water solution and nano photocatalyst to be tested into a cylindrical quartz reactor, and stirring for 5min in a lightproof environment at a speed of 30r/min to disperse the catalysts uniformly; detecting and marking concentration of silver ions as C0; opening a light source, continuously stirring at the speed of 30r/min for reaction, and marking concentration of residual silver ions in the solution as Ci; evaluating catalytic performances of the nano photocatalyst, wherein a percent reduction is R=(C0-Ci)/C0*100%; defining the activity intensity of the catalyst with the highest percent reduction in the nano photocatalysts to be tested as 1, and calculating to obtain relative catalytic activities of residual catalysts. The silver ions are used as a probe, no intermediate products exist in a reaction process, the capability for generating electrons of the nano photocatalysts can be directly expressed, required detection time is shorter, interference factors are less and measuring is more accurate.