银改性斜沸石光催化降解水溶液中的二嗪酮

Milad Hallajiqomi, Mohsen Mehdipour Ghazi, F. Varaminian
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引用次数: 1

摘要

以斜沸石沸石-银为光催化剂,在光催化反应器中对水中重氮磷进行了降解试验。采用微波能技术合成了斜沸石沸石-银光催化剂。研究了AgO在光催化反应器中对重氮肼处理的影响。通过x射线衍射(XRD)、场发射扫描电镜(FESEM)、布伦纳-埃米特-泰勒(BET)和漫反射光谱(DRS)等分析方法对所制备的光催化剂进行了表征。利用XRD对每一种混合物进行分析,选取斜沸石的三个特征峰(2Ɵ = 9.84, 11.17, 22.35)进行峰强度求和计算。实验考察了pH、光催化剂投加量、初始二嗪肼和照射时间等经验因素对降解效率的影响。结果表明,降解重氮磷的最佳条件为pH = 9,光催化剂用量为1 g/L,照射时间为120 min。斜沸石沸石-银光催化剂的零电荷点(pzc)为8,即表面电荷密度为零。这种优异的催化性能主要归功于光催化剂和吸附剂的杂化作用。
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Degradation of Diazinon from aqueous solution using Silver-modified Clinoptilolite Zeolite in photocatalytic process
photocatalytic reactor was tested in the degradation of diazinon in water using photocatalyst clinoptilolite zeolite-silver. The photocatalyst clinoptilolite zeolite-silver was synthesized using a microwave energy technique. The influence of AgO in the photocatalytic reactor was investigated for diazinon treatment. The prepared photocatalyst was authenticated by X-Ray Diffraction (XRD), for Field Emission Scanning Electron Microscope (FESEM), Brunner-Emmet-Teller (BET), and Diffuse Reflectance Spectroscopy (DRS) analysis methods. Every one of the mixtures was analyzed using XRD, and the three distinctive peaks (2Ɵ = 9.84, 11.17, and 22.35) of clinoptilolite were chosen for which the calculations of the peak intensity summation were done.  The experiments appraised the influence of various empirical factors, e.g., pH, photocatalyst dosage, initial diazinon, and irradiation time on the degradation efficiency. The results showed that the optimum conditions for diazinon degradation were a pH of 9, photocatalyst dosage of 1 g/L and irradiation time of 120 min. The point of zero charge (pzc) of the photocatalyst clinoptilolite zeolite-silver, the point when the surface charge density is zero, was identified to be 8. This excellent catalytic ability was mainly attributed to the hybrid effect of the photocatalyst and adsorbent.
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