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首页> 外文期刊>Science and Technology of Advanced Materials >Activity of nanosized titania synthesized from thermal decomposition of titanium (IV) n-butoxide for the photocatalytic degradation of diuron
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Activity of nanosized titania synthesized from thermal decomposition of titanium (IV) n-butoxide for the photocatalytic degradation of diuron

机译：钛（IV）正丁醇热分解合成的纳米二氧化钛的光催化降解杜伦的活性

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摘要

Nanoparticles of anatase titania were synthesized by the thermal decomposition of titanium (IV) n-butoxide in 1,4-butanediol. The powder obtained was characterized by various characterization techniques, such as XRD, BET, SEM and TEM, to confirm that it was a collection of single crystal anatase with particle size smaller than 15 nm. The synthesized titania was employed as catalyst for the photodegradation of diuron, a herbicide belonging to the phenylurea family, which has been considered as a biologically active pollutant in soil and water. Although diuron is chemically stable, degradation of diuron by photocatalyzed oxidation was found possible. The conversions achieved by titania prepared were in the range of 70-80% within 6 h of reaction, using standard UV lamps, while over 99% conversion was achieved under solar irradiation. The photocatalytic activity was compared with that of the Japanese Reference Catalyst (JRC-TIO-1) titania from the Catalysis Society of Japan. The synthesized titania exhibited higher rate and efficiency in diuron degradation than reference catalyst. The results from the investigations by controlling various reaction parameters, such as oxygen dissolved in the solution, diuron concentration, as well as light source, suggested that the enhanced photocatalytic activity was the result from higher crystallinity of the synthesized titania.
机译：通过在1,4-丁二醇中热分解正丁醇钛（IV）合成了锐钛矿型二氧化钛纳米颗粒。通过各种表征技术，如XRD，BET，SEM和TEM对获得的粉末进行表征，以确认它是粒径小于15 nm的单晶锐钛矿的集合体。合成的二氧化钛被用作Diuron（一种属于苯基脲家族的除草剂）的光降解催化剂，Diuron被认为是土壤和水中的生物活性污染物。尽管杜隆在化学上是稳定的，但发现通过光催化氧化降解杜隆是可能的。使用标准的紫外线灯，在制备的二氧化钛在反应6小时内，所获得的转化率在70-80％的范围内，而在太阳辐射下则可实现99％以上的转化率。将光催化活性与日本催化学会的日本参考催化剂（JRC-TIO-1）二氧化钛进行了比较。合成的二氧化钛显示出比参考催化剂更高的二氮杂降解速率和效率。通过控制各种反应参数（例如溶液中溶解的氧气，敌草隆浓度以及光源）的研究结果表明，增强的光催化活性是合成二氧化钛结晶度更高的结果。

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