Patent ID: 7948624

Claim:
A photocatalytic activity testing device comprising: a reaction chamber for containing a methylene blue solution and a photocatalyst; a light source for illuminating the methylene blue solution and the photocatalyst contained in the reaction chamber; a light-tight chamber, the reaction chamber and the light source being received in the light-tight chamber; a spectrophotometer comprising: an emitter positioned outside the light-tight chamber and configured for emitting carrier light; a first fiber interconnecting the emitter and the reaction chamber and configured for guiding the carrier light from the emitter to the reaction chamber; a second fiber; a sensor positioned outside the light-tight chamber, the second fiber interconnecting the reaction chamber and the sensor and being configured for guiding the carrier light from the reaction chamber to the sensor, the sensor being configured for sensing color of the carrier light from the reaction chamber; and a reader configured for calculating color vanishing rate of the methylene blue solution using the sensed color, according to Lambert-Beer's law and presenting the calculated color vanishing rate of the methylene blue solution to users; and a temperature stabilizer configured for stabilizing temperature of the methylene blue solution.