Catalytic reduction of nitrophenols and dyes using silver nanoparticles @ cellulose polymer paper for the resolution of waste water treatment challenges

Poly(acrylic acid) hydrogel microparticles fabricated with silver nanoparticles: synthesis, characterization, and catalytic applications

“…The PAAHMPs/AgNPs composite has shown excellent potential as a catalyst by accelerating the reduction of 4-NP, 4-NP and MO. No loss in catalytic activity was observed in recycling even in seven consecutively cycles while only 36.5% loss in activity was observed upon storage of dried catalyst in airtight container for k app (min −1 ) Effect of storage time Effect of recycling P(AAm-co-MTM)-AuNPs [43] 0.135 Not reported Not reported Amid-p(MAA-co-AN)-CoNPs [25] 0.074 Not reported No loss in catalytic activity till 7 cycles PMAAH/NiNPs [30] 0.038 Not reported 20% loss in catalytic activity in fourth cycle PAAHMPs/CoNPs [34] 0.117 Not reported No loss in catalytic activity till 5 cycles Ag@CAF [44] 0. Abbreviations: Ag@CAF, AgNPs supported by cellulose acetate filter paper; Ag@TiO 2 , AgNPs supported by titanium dioxide; Amid-p(MAAco-AN), amidoximated poly(methacrylic acid-co-acrylonitrile); PMAAH, poly(methacrylic acid) bulk hydrogel; PAAHMPs, poly(acrylic acid) hydrogel microparticles; P(AAm-co-MTM) = poly(acrylamide-co-N-metacrylamido thiomorpholine) bulk hydrogel.…”

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

“…This consists of the use of phytochemicals like polyphenols, flavonoids, and alkaloids, extracted from different natural sources, as Ag + reductants. Albukari and coworkers have proposed the use of Duranta erecta leaves' extract for synthesizing AgNPs directly on cellulose polymer paper [20]. Das' group considered the Hibiscus sabdariffa shrub The combination of different and complementary analytical techniques is necessary to confirm nanoparticle formation (XRD), bonding on the cellulose support by involving hydroxyl groups (FTIR), and homogeneous dispersion of nanoparticles on the polymeric matrix (SEM, TEM).…”

“…This consists of the use of phytochemicals like polyphenols, flavonoids, and alkaloids, extracted from different natural sources, as Ag + reductants. Albukari and coworkers have proposed the use of Duranta erecta leaves' extract for synthesizing AgNPs directly on cellulose polymer paper [20]. Das' group considered the Hibiscus sabdariffa shrub as a source of both nanocellulose from stem and reducing agents from flowers and leaves [183].…”

“…Engineered nanomaterials (ENMs) are typically defined as materials smaller than 100 nm in at least one dimension, and they have specific surface functionalizations and size-dependent properties, such as high reactivity and large surface-to-volume ratio, that satisfy their wide range of applications, including in sensing [1][2][3][4][5], optics [6][7][8][9][10], energy [11][12][13][14][15], catalysis [16][17][18][19], biotechnology [20][21][22][23][24] and so on.…”

Fabrication of CS/GA/RGO/Pd composite hydrogels for highly efficient catalytic reduction of organic pollutants

“…The comparison of the catalytic activity of CS/GA/RGO/Pd catalyst in the reduction of 4-NP and 2-NA with different reported catalysts is presented in Tables 2 and 3, respectively. 25,[59][60][61][62][63][64][65][66][67] The results show that CS/GA/RGO/Pd catalyst has good catalytic performance. Moreover, the raw materials and preparation process of CS/GA/RGO/Pd hydrogel are green, pollution-free and environmentally friendly.…”