纳米二氧化钛对靛蓝染料的紫外辐射催化降解

UV Radiation-Catalyzed Degradation of Indigo Dye by Nano TiO_(2)

为研究二氧化钛对固态靛蓝、靛蓝悬浮液的光催化效果,以固体表观变化、K/S值、红外光谱图、悬浮液浊度为指标,考察了纳米二氧化钛含量、光照时间以及光源等对催化降解靛蓝的影响。结果表明:纳米二氧化钛对固态靛蓝具有催化降解能力;辐射时间越长,固态靛蓝的脱色速率越快;紫外辐射8 h,固态靛蓝的脱色较快;提高二氧化钛的含量有利于固体靛蓝的褪色;二氧化钛浓度为60%时,催化降解效果较好;据红外光谱图推测,固态靛蓝在纳米二氧化钛的作用下可直接降解矿化。

In order to study the photocatalytic effect of titanium dioxide on solid indigo and indigo suspension,the effects of nano titanium dioxide content,illumination time,and light source on the catalytic degradation of indigo were investigated using solid surface changes,K/S values,infrared spectra,and suspension turbidity as indicators.The results show that nano titanium dioxide has catalytic degradation ability for solid indigo.The longer the radiation time,the faster the decolorization rate of solid indigo.After 8 hours of ultraviolet radiation,the decolorization of solid indigo is faster.Increasing the content of titanium dioxide is beneficial for the fading of solid indigo.When the concentration of titanium dioxide is 60%,the catalytic degradation effect is better.According to the infrared spectrum,it is speculated that solid indigo can directly degrade mineralization under the action of nano titanium dioxide.