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首页> 外文期刊>Catalysis science & technology >Assessment of an intrinsic kinetic model for TiO2-formic acid photodegradation using LEDs as a radiation source
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Assessment of an intrinsic kinetic model for TiO2-formic acid photodegradation using LEDs as a radiation source

机译：评估的内在动力学模型使用led作为TiO2-formic酸光降解辐射源

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Dependency of HCOOH photodegradation on radiation wavelength was evaluated by using LEDs with different emission spectra. Two commercial TiO(2)photocatalysts, one of them modified with carbon, were used. From the optical properties of the photocatalyst suspensions, higher scattering coefficients were detected for the C modified TiO2. Radiation absorption profiles and volumetric rates of photon absorption were calculated to analyze the effect of radiation wavelength, photocatalyst loading and the amount of incident radiation flux. A 365 nm LED provided faster photodegradation rates and quantum efficiencies and consumed less electric power. Furthermore, when an LED with an emission peak centered at 405 nm was employed, the photocatalyst modified with carbon yielded faster photodegradation rates than the photocatalyst only made of TiO2. Finally, an intrinsic kinetic model was developed to simulate the process and the intrinsic kinetic parameters were obtained for the LEDs employed, obtaining root mean square error (RMSE) values below 10%. For both photocatalysts, the highest intrinsic kinetic parameters were obtained with the LED with an emission peak at 365 nm.
机译：依赖HCOOH光降解的辐射波长被使用发光二极管和评估不同的发射光谱。TiO(2)催化剂,其中一个修改碳,。光催化剂悬浊液,更高的散射系数C修改检测二氧化钛。容积率光子吸收计算分析辐射的影响波长、光催化剂装载量入射辐射通量。更快的光降解率和量子效率和更少的电力消耗。此外,当一个领导一个发射峰集中在405 nm受雇光催化剂改性的碳产生更快比光催化剂光降解率只有由二氧化钛。模型模拟过程和发展的内在动力学参数led采用,得到均方根错误(RMSE)值低于10%。论文的,最高的内在动力得到领导与一个参数发射峰在365海里。

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