Enriched Catalytic Activity of TiO2 Nanoparticles Supported by Activated Carbon for Noxious Pollutant Elimination

Abstract

Cleaning wastewater has become one of the most serious issues for a number of scientists and researchers in recent years, as water is the most basic need for the daily life of humans. There has been a focus on the removal of noxious pollutants from wastewater effluents by using nanocatalysts owing to their unique physicochemical actions and stability. Herein we manufactured TiO2 nanoparticles supported by activated carbon (AC-TiO2) using a cost-effective sonochemical method. The band structures of the AC-TiO2 and TiO2 were modified from 3.2 to 3.1 eV, thus increasing the catalytic activity. The structural, optical and anatase crystal phase properties, with morphological confirmation, were studied by applying UV-DRS, PL, FESEM, XRD, along with HRTEM, respectively. The specific surface area, calculated by BET analysis, was found to be ~241 m2/gm and ~46 m2/gm for AC-TiO2 and TiO2. The degradation efficiency of the as-prepared nanocatalysts against the very toxic but rarely studied organic textile dye pollutant RO 84 was investigated and 97% efficiency were found for the AC-TiO2 as compared to pure TiO2, which is a highly appreciated finding in the catalytic dye degradation application domain. Such surface-modified nanocatalysts could be further implemented for the treatment of wastewaters/waste effluents released from chemical industries, laboratories and other sources.

Application of Green Synthesized MMT/Ag Nanocomposite for Removal of Methylene Blue from Aqueous Solution

“…Numerous adsorbents (natural and engineered) have been studied by various researchers for the removal of dye molecules such as activated carbon [15,16], zeolite [17], tourmaline [18], black phosphorous nanosheet [19], waste materials [20], dead biomass [21], natural clay and clay minerals [22,23] and agricultural waste materials [24]. Recently, nanotechnology-driven materials such as clay/metal nanocomposites are being explored for their potential as efficient adsorbents, where metal nanoparticles act as fillers and clay provides support for their synthesis.…”

Nanostructured Antibiotics and Their Emerging Medicinal Applications: An Overview of Nanoantibiotics

“…Metal-based nanomaterials are frequently found to exert non-specific negative bacterial effects, such as the fact that they do not bind to a specific receptor in the bacterial cell, making it more difficult for bacteria to develop resistance ( Figure 2 ) and extending the antibacterial field [ 28 ]. A wide range of nanostructures, including Au, Ag, CuO, TiO 2 , MgO, and ZnO, are projected to become antibacterial nanosystem alternatives [ 30 , 31 , 32 ].…”

“…Research indicates that employing silver nanoparticles into certain drugs successfully increases the cumulative effects of antibiotics such as cefuroxime, azithromycin, fosfomycin, cefoxime, and chloramphenicol against Escherichia coli . Although the antibacterial efficacy of silver nanoparticles in conjunction with oxacillin and neomycin was reported to be lower against Staphylococcus aureus when contrasted with antibiotics alone, the conjunction of zinc oxide nanoparticles within antibiotics improved the antimicrobial efficacy [ 31 ]. On the other hand, following green-route synthesis employing Allium sativum extract to develop silver nanoparticles was also studied.…”

“…Copper nanoparticles are employed in a multitude of scenarios, notably electrochemical sensors, optoelectronic devices, solar panels, and paints and varnishes [ 44 ]. Parikh et al [ 31 ] employed Datura leaf extract to synthesize copper nanoparticles. The copper NPs outperformed standard chloramphenicol in antibacterial activity versus E. coli , Bacillus megaterium , and Bacillus subtilis , demonstrating that copper NPs can be used as antimicrobial agents instead of antibiotics.…”

Functionalized Microbial Consortia with Silver-Doped Hydroxyapatite (Ag@HAp) Nanostructures for Removal of RO84 from Industrial Effluent

“…In this context, reactive orange 84 (RO84), one of the most popular dyes, is frequently employed for dyeing textile and inking paper, as well as for other commercial uses, such as the synthesis of toys, foods, and bulk drugs. Additionally, due to reactive dyes' water solubility, traditional biological, physical, and chemical methods fail to effectively clean dye discharge [3,4]. Therefore, researchers and employees have been inspired to develop effective green technologies to address such environmental challenges, particularly in the dye and textile sectors.…”