CAJ | 학술논문

采用水热方法制备了纳米硫化镉光催化剂.借助粉末X-射线衍射(XRD),固体紫外可见漫反射光谱(DRS)对合成产物进行了表征.以纳米CdS和本体CdS作为可见光的光催化剂,用难降解的离子型染料罗丹明B为探针分子,讨论了溶液常见的共存金属离子种类、质量分数对CdS光催化降解罗丹明B的影响.结果表明:共存离子Cu~(2+)对CdS光催化降解罗丹明B起抑制作用,Ag~+对CdS光催化降解罗丹明B没有显著影响,而共存离子Fe~(3+)和Pr~(3+)能显著地提高纳米、本体CdS光催化剂降解罗丹明B的降解速率,最佳的离子质量分数分别为催化剂用量的0.5% 和10%.
채용수열방법제비료납미류화력광최화제.차조분말X-사선연사(XRD),고체자외가견만반사광보(DRS)대합성산물진행료표정.이납미CdS화본체CdS작위가견광적광최화제,용난강해적리자형염료라단명B위탐침분자,토론료용액상견적공존금속리자충류、질량분수대CdS광최화강해라단명B적영향.결과표명:공존리자Cu~(2+)대CdS광최화강해라단명B기억제작용,Ag~+대CdS광최화강해라단명B몰유현저영향,이공존리자Fe~(3+)화Pr~(3+)능현저지제고납미、본체CdS광최화제강해라단명B적강해속솔,최가적리자질량분수분별위최화제용량적0.5% 화10%.
Nano-crystal CdS photocatalyst was prepared by hydrothermal method.The product was characterized by X-ray diffraction (XRD) and UV-Vis diffused reflectance spec-troscopy (DRS). The effects of the variety of co-existing ions and concentration of ions on photodegradation of Rhodamine B (RhB) were investigated under the conditions of the nano-crystal CdS and bulk CdS as the visible-light photocatalyst and RhB as a molecule Probe. The results show that the co-existing ion Cu~(2+) was found to inhibit the activity of photocatal-ysis, the co-existing ion Ag~+ had not significant effect on photocatalysis reaction, and the co-existing ions Pr~(3+) and Fe~(3+) can significantly improve the photodegradation of RhB with the nanocrystal CdS or bulk CdS, and the optimal mass fraction of Fe~(3+) is 0. 5% of CdS mass and Pr~(3+) is 10%.