Effects of precursor composition used in solution precursor plasma spray on the properties of ZnO coatings for CO2 and UV light sensing

SURFACE & COATINGS TECHNOLOGY

卷:371

Article; Proceedings Paper

Candidato, Rolando T., Jr.¹  Ontolan, Jose Presiphil, Jr.¹  Carpio, Pablo²  Pawlowski, Lech³  Vequizo, Reynaldo M.¹ 

[1] MSU IIT, Coll Sci & Math, Phys Dept, A Bonifacio Ave, Iligan 9200, Philippines

[2] Univ Politecn Valencia, ITM, Valencia, Spain

[3] Univ Limoges, Inst Rech Ceram IRCER, UMR CNRS 7315, Ctr Europeen Ceram, 12 Rue Atlantis, F-87068 Limoges, France

关键词: CO2 gas sensor;    UV sensor;    Sensitivity;    SPPS;    ZnO coatings;   

DOI  :  10.1016/j.surfcoat.2018.10.009

来源: Elsevier

【 摘 要 】

The potential of finely-structured zinc oxide (ZnO) coatings developed via solution precursor plasma spraying (SPPS) as CO2 gas and UV light sensor was explored in this work. The coatings were deposited on stainless steel substrates using aqueous solutions of zinc nitrate and zinc acetate as precursors. The coatings' microstructures were studied in relation to the solution precursors used. Relatively porous coatings were obtained when using acetate as starting precursor compared to the coatings from the nitrate precursor. This was attributed to the different chemical routes of ZnO formation for each precursor droplet upon contact with plasma jet. Phase analysis confirmed the formation of polycrystalline ZnO having wurtzite structure from both precursors. The sprayed ZnO coatings showed good sensitivity and recovery towards UV light. Moreover, the coatings were sensitive towards carbon dioxide (CO2) analyte gas but did not show any good recovery which was attributed to the microstructure of the coatings. These results showed the feasibility of SPPS process for the fabrication of finely-structured ZnO coatings as sensors of CO2 gas and UV light.

【 授权许可】

Free