Silver/graphene oxide nanocomposite: Process optimization of mercury sensing and investigation of crystal violet removal

• Published in: Inorganic chemistry communications 2023-05, Vol.151, p.110613, Article 110613
• Main Authors: Dat, Nguyen Minh, Thinh, Doan Ba, Nam, Nguyen Thanh Hoai, Hai, Nguyen Duy, Huong, Le Minh, Hanh, Nguyen Thi, Phong, Mai Thanh, Hieu, Nguyen Huu
• Format: Article
• Language: English
• Subjects: Box–Behnken model; Experimental design; Graphene oxide; Nanocomposite; Silver
• ISSN: 1387-7003; 1879-0259
• DOI: 10.1016/j.inoche.2023.110613

[Display omitted] •A facile method to fabicate silver/graphene oxide (AG) nanocomposite.•The development of Box-Behnken model to examine the AG’s ability in Hg(II) sensing.•High Hg(II) selectivity of AG3 in water with a low LOD of 19.06 ± 0.42 µg/L.•The adsorption capacity of AG2 for crystal violet of 93.45 mg/g. In this work, the silver/graphene oxide (AG) nanocomposite was synthesized with various AgNO3:GO ratios according to our previous studies. The characterization of AG nanocomposites is determined through modern analytical methods, resulting in particle sizes of 18.09 ± 3.78 nm (1:1 wt/wt − AG2) and 22.88 ± 4.67 nm (1.25:1 wt/wt − AG3). Further investigations on the smallest variation of factors affecting the Hg(II) sensing ability of AG nanocomposite were examined through the Box-Behnken model. The obtained results showed that the sensing performance of AG3 achieved a limit of detection of 19.06 ± 0.42 μg/L with AG dose of 49.21 mg/L, solution salinity of 52 ‰, and interaction time of 10.08 min. The acceptable relative standard deviation of 6.7% revealed the high precision of the treatment. Meanwhile, AG2 demonstrates the highest adsorption capacity towards CV, attaining 100 % of removal with the initial concentration of less than 25 mg/L; concurrently, the adsorption behavior follows the Langmuir isotherm model and provides impressive reusability. The research has introduced the AG nanocomposite as a promising material in Hg(II) sensing and crystal violet removal.