Silver Nanoparticles Influence on Photocatalytic Activity of Hybrid Materials Based on TiO₂ P25

Abstract

The aim of the present study consists in the obtaining of a hybrid material film, obtained using TiO2P25 and silver nanoparticles (AgNPs). The film manufacturing process involved realization of physical mixtures of TiO2P25 and AgNPs dispersions. The size distribution of the AgNPs proved to be a key factor determining the photodegradation activity of the materials measured using methyl orange. The best result was 33% degradation of methyl orange (MO) after 150 min. The second approach was the generation of AgNPs on the surface of TiO2P25. The obtained hybrid material presents photocatalytic activity of 45% MO degradation after 150 min. The developed materials were characterized by UV-VIS, SEM, and DLS analyses.

Silver Nanoparticles for Water Pollution Monitoring and Treatments: Ecosafety Challenge and Cellulose-Based Hybrids Solution

“…Some examples of Ag ENMs used for polluted water treatments are reported in Table 2 , pointing out AgNP size and supporting the existence of synergic effects in some cases [ 61 , 75 , 109 , 110 , 111 , 112 ].…”

“…Some examples of Ag ENMs used for polluted water treatments are reported in Table 2, pointing out AgNP size and supporting the existence of synergic effects in some cases [61,75,[109][110][111][112]. A large number of innovative hybrid materials with a synergetic or complementary behavior were obtained using Ag-based photocatalysts.…”

New carbon/ZnO/Li2O nanocomposites with enhanced photocatalytic activity

“…The photodegradation monitoring of the experiment involved the decomposition of 500 mL MO with a concentration of 5 · 10 −5 M at pH = 6 using a modified commercial set-up described elsewhere 15 . The set-up was comprised of a microdosing pump Masterflex-Unipan 335 with a flow fixed at 350 mL/h; a UV light bulb tube was introduced inside the quartz tube (𝜆 = 360 nm, power 4 W); a 5 mL flask was used to collect samples.…”

“…: ZnO, SnO, TiO 2 , etc.) 11–15 that generate hydroxyl free radicals as oxidizing agents that decompose the organic contaminants to CO 2 and H 2 O in the presence of UV light, hydrogen peroxide or ozone 2,15–17 . Compared to pure inorganic metal oxides, the nanomaterials that use biochar as support for the deposition of the inorganic particles can promote the photodegradation of the organic dyes with increased degradation rate 18–20 .…”

Influence of Poly(vinylpyrrolidone) concentration on properties of silver nanoparticles manufactured by modified thermal treatment method

“…Noble metal nanoparticles, especially silver nanoparticles with narrow size distributions, have very wide applications in the various fields of nanotechnology including being used as catalysis and biocatalysis [ 1 – 6 ], in surface enhanced resonance Raman scattering [ 7 , 8 ], in function improvement of the Remie Fibers [ 9 ] in environmental application [ 10 ], in therapeutics, diagnostic assays and medical diagnostics [ 11 – 21 ], in thermal ablation, and radiotherapy enhancement [ 22 – 24 ] in drug and gene delivery [ 25 , 26 ], sensors and optical biosensors [ 27 – 31 ], oil refining processes, and fuel cell technology [ 32 ], in plastic industry [ 33 ] and optical applications [ 34 ]. Also noble metal nanoparticles especially silver nanoparticles have biomedical and antimicrobial applications in human health care such as coating contact lenses, cardiovascular implants, wound dressing, bone cement and other implants, medical catheters, bandages, endodontic filling materials, dental instruments [ 35 ].…”