Self-clean coat­ings are breath of fresh air

Shanghai Daily - - METRO - Yang Meip­ing

RE­SEARCH into pho­to­cat­alytic tech­nol­ogy has been given a lift thanks to an agree­ment be­tween the Shang­hai Nor­mal Uni­ver­sity and the Shang­hai Wan­ming En­vi­ron­men­tal Pro­tec­tion Tech­nol­ogy Co.

The tech­nol­ogy can be used to pro­duce ex­ter­nal wall coat­ings that can self-clean and pu­rify the sur­round­ing air.

The com­pany is also test­ing a new coat­ing prod­uct that could be used on roads to ab­sorb ve­hi­cle ex­haust.

“Our coat­ing prod­ucts have been used on some ex­te­rior walls of build­ings such as the Shang­hai Sta­dium and Songjiang branch of the Shang­hai Gen­eral Hos­pi­tal,” said Chen Naxin, gen­eral man­ager of the com­pany.

“Those walls painted with our coat­ing are still bright af­ter sev­eral years. It’s also ef­fec­tive in pre­vent­ing de­ter­gents from cor­rod­ing into walls.”

Chen said that 200 square me­ters of ex­te­rior walls with pho­to­cat­alytic coat­ing can pu­rify as much air as 14 white poplars.

Li Hex­ing, di­rec­tor of the uni­ver­sity’s In­ter­na­tional Joint Lab­o­ra­tory on Re­source Chem­istry, said pho­to­cat­alytic tech­nol­ogy also has great po­ten­tial in other ap­pli­ca­tions as it can cre­ate a chem­i­cal re­ac­tion sim­i­lar to pho­to­syn­the­sis, ef­fec­tively de­com­pos­ing or­ganic com­pounds into harm­less car­bon diox­ide and wa­ter.

Li’s lab and the com­pany will work to­gether to do more re­search as well as cul­ti­vate tal­ent.

Zou Zhi­gang, an aca­demic at the Chi­nese Academy of Sciences and a pro­fes­sor at Nan­jing Uni­ver­sity, said the tech­nol­ogy could also be used in in­door dec­o­ra­tion and car pan­els.

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