研究目的
Investigating the combined adsorption process and photocatalytic degradation of some commercial herbicides over N-doped TiO2 particles supported on recyclable magnetic hexagonal mesoporous silica.
研究成果
N-doped TiO2 supported on magnetic HMS nanoparticles were found to be recyclable and active photocatalysts for the degradation of aqueous solutions of trifluralin, 2,4-D, and glyphosate. The study demonstrated a synergetic effect between adsorption and photodegradation, with the process following first-order kinetics. The photocatalysts showed enhanced stability and reusability.
研究不足
The study did not address the scalability of the process for large-scale wastewater treatment plants, potential deactivation of the photocatalyst over time, and the environmental impact of the by-products formed during the degradation process.
1：Experimental Design and Method Selection
The study involved the preparation of magnetic hexagonal mesoporous silica (magnetic HMS) containing N-doped TiO2 by hydrothermal method. The photocatalytic degradation of herbicides was studied under UV/visible light irradiation.
2：Sample Selection and Data Sources
The study focused on the removal of trifluralin, 2,4-dichlorophenoxyacetic acid, and glyphosate herbicides from aqueous solutions.
3：List of Experimental Equipment and Materials
Equipment included a Philips LP 8 W low pressure mercury lamp and daylight lamps (40 W) for UV and visible light sources, respectively. Materials included magnetic HMS and N-doped TiO2 particles.
4：Experimental Procedures and Operational Workflow
Batch experiments were performed using 0.25 g FM/TiNx in 100 cc aqueous solution of each herbicide in a glass photoreactor. The suspension was stirred at 500 rpm and constant temperature of 25°C.
5：Data Analysis Methods
The decrease of herbicide concentration and TOC were followed by HPLC device and TOC analyzer, respectively. Kinetic studies were conducted to understand the photodegradation process.
独家科研数据包，助您复现前沿成果，加速创新突破
获取完整内容
