Raspberry like creosol red functionalized zincite supported silica-titania nanocomposite: Correlation of structural, optical, and pH sensing properties. (November 2022)

• Record Type: Journal Article
• Authors: Islam, Shumaila; Alshoaibi, Adil
• Is Part Of: Materials research bulletin. Volume 155(2022)
• Publication Date: 2022-11
• Subjects: Zincite -- Silica-titania nanocomposite -- creosol red dye -- ph sensing Sol-gel method; Materials -- Periodicals; Crystal growth -- Periodicals; Matériaux -- Périodiques; Cristaux -- Croissance -- Périodiques; Crystal growth; Materials; Periodicals; 620.11
• DOI: 10.1016/j.materresbull.2022.111967
• Languages: English
• ISSNs: 0025-5408

Abstract

Highlights: Owing to fast-response and broad pH range, sol-gel based cresol red encapsulated zincite supported silica-titania nanocomposite is synthesized at low- temperature. CR/ZSTC had raspberry-like porous structure with uniform distribution of elements. The CR/ZSTC exposed ra ∼ 6 nm, transmission 86%, and n around 1.49 at 633 nm. A fast color time response of 0.5 s at pH 12 and high pKa value around 8 is detected. Experimental findings suggested that synthesized CR/ZSTC has potential for optical pH sensor. Abstract: Owing to fast-response and broad pH range, sol-gel-based zincite (zinc oxide) supported silica-titania nanocomposite (ZSTC) and cresol red encapsulated ZSTC (CR/ZSTC) are synthesized at low- temperature. SEM and EDX mapping exhibited that CR/ZSTC had a raspberry-like porous structure with uniform distribution of elements. The ZSTC exhibited a Ra (surface roughness) 1 nm, transmission 87%, and a refractive index (n) 1.48. The CR/ZSTC exposed Ra ∼ 6 nm, transmission 86%, and n around 1.49 at 633 nm. A fast color time response of 0.5 s at pH 12 and a high pKa value around 8 is detected. Experimental findings suggested that synthesized CR/ZSTC has the potential for optical pH sensors. Graphical abstract: Image, graphical abstract