CdTe nanoparticles encapsulation in mesoporous titania-silica nanocomposite for phenol red pH sensing

被引：3
|
作者：
Alamer, Kawther [1 ]
Islam, Shumaila [2 ]
Alshoaibi, Adil [2 ]
Alnaim, Nisrin [2 ]
Bakhtiar, Hazri [3 ]
机构：
[1] King Faisal Univ, Coll Sci, Dept Chem, POB 400, Al Hasa 31982, Al Hofuf, Saudi Arabia
[2] King Faisal Univ, Coll Sci, Dept Phys, POB 400, Al Hasa 31982, Al Hufuf, Saudi Arabia
[3] Univ Teknol Malaysia, Ibnu Sina Inst Sci & Ind Res, Laser Ctr, Skudai 81310, Johor, Malaysia
来源：
OPTICAL MATERIALS | 2024年 / 148卷
关键词：
Titania -silica nanocomposite; Cadmium telluride nanoparticles; Sol -gel technique; Phenol red sensing; Mesoporosity; OPTICAL-PROPERTIES; SOL; FILMS; MATRIX; DYE;
D O I：
10.1016/j.optmat.2024.114889
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Owing to phenol red (PR) pH sensing, cadmium telluride (CdTe) nanoparticles are encapsulated in titania-silica nanocomposite (CdTe-TSNC) at low temperatures by sol-gel method. Scanning electron microscopy (SEM) revealed the dense and porous colonial nanostructures of CdTe-TSNC. Atomic force microscopy (AFM) possessed an average surface roughness of around 4 nm and a thickness 25 nm for TSNC (titania-silica nanocomposite) which reduced to 1 nm and 4 nm, respectively, after CdTe encapsulation. Thermally stable CdTe-TSNC possessed a large surface area 411 m2/g, transmittance 77 %, and refractive index 1.4 at 550 nm. The PR/CdTe-TSNC (PR immobilized CdTe-TSNC) exhibited large pKa 9.4 with fast time response 0.21 s in pH 12 without leaching.
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页数：11
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