University Chemistry ›› 2022, Vol. 37 ›› Issue (5): 2111031.doi: 10.3866/PKU.DXHX202111031

Special Issue: 第2届全国大学生化学实验创新设计竞赛

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A Blue Painting Painted with a "Light Pen": The Prodigious Photochemical Reaction of Cyanotype

Xiaolan Lü, Yu Hu, Sihao Wu, Yinhe Qu, Mingming Wang, Yan Zhao, Hu Cai()   

  • Received:2021-11-10 Accepted:2021-11-15 Published:2022-03-18
  • Contact: Hu Cai


Photochemical reactions are ubiquitous in our daily life. The cyanotype is a typical application of photochemical reactions to promote social development; it is generally well received due to its indefectible blue color. We have designed a popular science experiment program for three different age groups based on the photochemical reaction characteristics of the cyanotype. This program launches popular science content contrapuntally and includes making cyanotype photos, explaining the concept and principles of photochemical reactions, and carrying out UV protection experiments. To enhance the connection with life, we also creatively expanded the cyanotype-ultraviolet experiment to intuitively show participants the principles and effects of ultraviolet light. These experiments are easy to operate, safe, and environmentally friendly. In addition, the experimental results are very attractive, ornamental, and artistic, and are easy to understand, accept, and participate in. At the same time, they can stimulate participants' interest in learning chemistry and describe how chemistry can improve life.

Key words: Cyanotype, Photochemical reaction, Popularization of chemistry, Ultraviolet ray


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