Effective degradation of tetracycline by mesoporous Bi2WO6 under visible light irradiation

双性人 2 WO 6 在不同 pHs 与一个热水的方法被综合并且在水里为四圜素(TC ) 的降级使用了。mesoporous 双性人 2 在 pH 准备的 WO 6(BWO-1 ) 1 由于它的大表面区域和更有效的能力显示了最高的吸附和降级能力到 TC 分开 photogenerated 电子和洞。在 20 mg 畤散琠敨猠浹瑰浯 ? 畢 ? 敲慬獰 ? 耶啱 @ 椠 ? 的 97% TC ? ┰漠 ?

Bi2WO6 was synthesized with a hydrothermal method at different pHs and used for the degradation of tetracycline （TC） in water. The mesoporous BiEWO6 prepared at pH 1 （BWO-1） displayed the highest adsorption and degradation capacity to TC due to its large surface area and more efficient capacity to separate photogenerated electrons and holes. 97% of TC at 20 mg · L-1 was removed by BWO-1 at 0.5 g-L-1 after 120min irradiation under simulated solar light. Only 31% of the total organic carbon （TOC） was removed after 360 min irradiation although the TC removal reached 100%, suggesting that TC was mainly transformed to intermediate products rather than completely mineralized. The inter- mediates were identified by high-performance liquid chromatography-time of flight-mass spectrometry （HPLC-TOF-MS） and possible photodegradation path- ways were proposed.