Biofabricated Silver Nanoparticles and Nanocomposites as Green Catalyst to Mitigate Dye Pollution in Water‐A Review

Abstract

Synthetic dyes are one of the major classes of pollutant released in the environment by industries such as textile, paper, leather, rubber, cosmetics, pharmaceutical etc. They are known carcinogen and extremely hazardous to human, plant and aquatic life. Conventional chemical, physical and biological methods used for treatment of industrial effluent are costly, time-consuming and produces secondary waste. Silver nanoparticle and nanocomposite-based catalyst are very effective in decomposition of dyes due to their high surface area-tovolume ratio, stability and biocompatibility. The degradation reaction takes place in presence of light (photocatalytic) or in presence of a reagent such as NaBH 4 or H 2 O 2 .Of various methods of silver nanoparticle/nanocomposite synthesis, green synthesis has been quite popular in recent times due to ease in synthesis and sustainability factor. In this review, current state of knowledge about application of green synthesized silver nanoparticles /nanocomposites in degradation of synthetic dyes and other organic pollutant have been summarized. Moreover, the article also emphasizes on the mechanism of degradation, the kinetic parameters and optimum treatment conditions.

Effect of Camellia sinensis Origin and Heat Treatment in the Iron Oxides Nanomaterials Composition and Fenton Degradation of Methyl Orange

“…[1][2][3] Different plants as black tea, Yerba Mate, grape seed, green tea, oolong tea, eucalyptus leaf, have produced different iron nanomaterials because of the different polyphenol composition and synthesis condition, which consequently affects the IONPs properties. [6][7][8][9][10][11][12][13][14][15] As reported in the literature, [6][7][8][9][10] most of the green IONPs are amorphous materials due to the high content of polyphenols, which precludes formation of defined crystalline nanomaterials as well as formation of iron oxides of scientific and technological interest. Thermal treatment has been described for green IONPs to favor the formation of crystalline and well-defined iron oxides.…”

Beyond Conventional: Antibacterial, Antioxidant, and Photocatalytic Properties of Nanofibers Featuring Metal-Oxide-Modified Boron Nitride Nanoparticles

“…5 For this reason, researchers focus on specific methods and technologies such as adsorption, coagulation, flocculation, advanced oxidation process, membrane separation, oxidation, ion exchange, electrochemical process, photocatalysis, and biodegradation for the remediation of dyes from wastewater. 6 Dye removal processes are expected to be able to effectively remove large quantities of dyes in a short period of time without generating secondary waste. 7 Among the aforementioned methods, photocatalytic degradation is an efficient, environmentally friendly, low-cost, and sustainable heterogeneous advanced oxidation process.…”

“…It also causes serious damage to human health, such as mutagenic effects, respiratory problems, kidney and liver dysfunction, reproductive system and central nervous system disorders, cancer, behavioral problems, and allergic reactions, depending on concentrations and exposure times . For this reason, researchers focus on specific methods and technologies such as adsorption, coagulation, flocculation, advanced oxidation process, membrane separation, oxidation, ion exchange, electrochemical process, photocatalysis, and biodegradation for the remediation of dyes from wastewater . Dye removal processes are expected to be able to effectively remove large quantities of dyes in a short period of time without generating secondary waste .…”

A pragmatic review on photocatalytic degradation of methyl orange dye pollutant using greenly biofunctionalized nanometallic materials: A focus on aquatic body

“…In recent times, several reviews 2,8,32,75–125 have been published on the photocatalytic degradation of various dye pollutants in an aquatic medium using different nanomaterials. However, only a few 2–4,77,81,82,86,91,96,102,123,124 focus on the biosynthesized NPs for the dye photodegradation application.…”

“…In recent times, several reviews 2,8,32,75–125 have been published on the photocatalytic degradation of various dye pollutants in an aquatic medium using different nanomaterials. However, only a few 2–4,77,81,82,86,91,96,102,123,124 focus on the biosynthesized NPs for the dye photodegradation application. More specifically, according to an exhaustive literature survey done by the authors, it was revealed that there is no critical pragmatic review directed toward the full spectrum of photocatalytic degradation of MO using biosynthesized MNPs.…”