Application of a triacetylcellulose membrane with immobilizated of 5-(2′,4′-dimethylphenylazo)-6-hydroxypyrimidine-2,4-dione for mercury determination in real samples

Nanomaterial-based optical sensors for mercury ions

“…Colorimetric assay is the analytical method which the signal recognition event of the target molecule can be transformed into naked-eye sensitive color change. It is extremely attractive in chemical and biological analysis for its advantages of simplicity, rapidity, and cost-effectiveness [39,40]. Compared with conventional organic chromophores or dyes, the molar extinction coefficients of noble metal nanomaterials, especially gold and silver nanomateials, are higher in 3~5 orders of the magnitude in the visible region, which is due to their unique localized surface plasmon resonance (LSPR) [41].…”

Recent advances in cellulose-based membranes for their sensing applications

“…Similarly, 5-(2 0 ,4 0 -dimethylphenylazo)-6-hydroxy-pyrimidine-2,4-dione (DMPAHPD) can be acted as metal-ions probes (Amin and Ahmed 2010). Amin (2015) designed a triacetylcellulose membrane loaded with DMPAHPD dyes for detecting Hg 2? ions.…”

“…Similarly, 5-(2′,4′-dimethylphenylazo)-6-hydroxy-pyrimidine-2,4-dione (DMPAHPD) can be acted as metal-ions probes (Amin and Ahmed 2010 ). Amin ( 2015 ) designed a triacetylcellulose membrane loaded with DMPAHPD dyes for detecting Hg 2+ ions. The complex formation occurred between Hg 2+ ions and this membrane, which led to the color change from orange to deep red.…”

“…The raw materials for cellulose membranes preparation can include ethyl cellulose, cellulose nanofibers, cellulose nanocrystals, cellulose acetate, triacetyl cellulose, sodium carboxymethyl cellulose, nitrocellulose, etc. (Fu et al 2019;Zhu et al 2019a, b;Li et al 2017a, b, c;Amin 2015;Duong et al 2018;Hittini et al 2020;Tang et al 2019). The excellent sensing performances can be obtained by introducing metal nanowires, metal nanoparticles, carbon dots, quantum dots, carbon nanotubes, fluorophores, organic dyes and antigen-antibodies into cellulose membranes through physical-chemical methods (Lou et al 2020;Zhang et al 2019a, b, c;Jiang et al 2020a, b;Li et al 2017a, b, c;Lv et al 2019a, b;Shankar et al 2020).…”

Ratiometric Upconversion Temperature Sensor Based on Cellulose Fibers Modified with Yttrium Fluoride Nanoparticles

“…Flexible sensors have recently attracted the interest of researchers, especially in the area of wearable devices, due to their ability to be conformed, bent, or rolled into the desired shapes, which greatly reduces the size of the device and makes mass production more economical. Sensors based on cellulose, which is a well-known natural biopolymer, are of particular interest [ 1 , 2 , 3 , 4 , 5 ]. The main advantages of cellulose are its availability, biodegradability, and low price [ 4 , 5 , 6 , 7 , 8 ].…”