CAJ | 학술논문

以 La(NO3)3?6H2 O 和 KOH 为原料,以EDTA、PVP和 HMTA等为模板剂,采用微波水热法制备得到纯相 La(OH)3,使用 X 射线衍射分析(XRD)、扫描电子显微镜(SEM)对产物的物相和形貌进行了分析,结果表明,不添加模板剂和添加 EDTA、PVP、HMTA 为模板剂时,可分别制备得到具有纳米棒状、类球形纳米颗粒、片状、纳米棒组装的片状形貌的纯相La(OH)3.光催化测试结果表明,模板剂可有效调控产物的微观形貌,并进一步提升 La(OH)3的光催化性能.其中添加 EDTA 得到的类球形 La(OH)3在21 min内对亚甲基蓝的降解率可达99％.
이 La(NO3)3?6H2 O 화 KOH 위원료,이EDTA、PVP화 HMTA등위모판제,채용미파수열법제비득도순상 La(OH)3,사용 X 사선연사분석(XRD)、소묘전자현미경(SEM)대산물적물상화형모진행료분석,결과표명,불첨가모판제화첨가 EDTA、PVP、HMTA 위모판제시,가분별제비득도구유납미봉상、류구형납미과립、편상、납미봉조장적편상형모적순상La(OH)3.광최화측시결과표명,모판제가유효조공산물적미관형모,병진일보제승 La(OH)3적광최화성능.기중첨가 EDTA 득도적류구형 La(OH)3재21 min내대아갑기람적강해솔가체99％.
Pure La(OH)3 was synthesized by microwave hydrothermal method using La(NO3 )3?6H2 O and KOH as raw materials and EDTA,PVP or HMTA as templates.The crystal phase and morphology of the ob-tained product were characterized by X-ray diffraction (XRD)and scanning electron microscopy (SEM).Results show that the obtained La(OH)3 products exhibit various morphologies like nano rods,sphere-like nano parti-cles,sheets and sheets assembled by nano rods when changing different templates in the hydrothermal reaction. Corresponding photocatalytic test results of the products indicate that the photocatalytic activity of La(OH)3 can be effectively enhanced by its different morphologies.When using EDTA as template,sphere-like La(OH)3 nano particles was found to show the highest degradation rate of methylene blue which was up to 9 9% within 2 1 min.