Photochemical microfluidic synthesis of vitamin D3 by improved light sources with photoluminescent substrates

• 来源期刊: 中国化学工程学报（英文版）
• 年，卷（期）: 2021,（1）
• 所属期刊栏目: Catalysis, Kinetics and Reaction Engineering
• 页码范围: 204-211
• 页数: 8页
• 语种: 英文

摘要

This study presents a novel technique for the controllable preparation of photoluminescent substrates to enhance the photochemical microfluidic synthesis of vitamin D3.The dip-coating method to prepare the substrates was experimentally optimized,and the corresponding emission behaviors were systematically investigated.The substrates were successfully used to enhance the ultraviolet B (UVB) emission of a low-power light source (eg.,an 8 W lamp),whose UVB emission intensity was increased by approximately 11 times.By virtue of the novel light source,the productivity of a single set of photochemical micro reactor with a 12-meter-long channel (0.6 mm i.d.) was increased to 1.83 kg·a-1,which was 42％ higher than that of a 100 W lamp,and no cooling devices were used.The method is simple and has great potential to replace traditional medium-pressure mercury lamps for UVB-irradiated photochemical reactions.