Promotion effects of halloysite nanotubes on catalytic activity of Co3O4 nanoparticles toward reduction of 4-nitrophenol and organic dyes

Ultrafast conversion of carcinogenic 4-nitrophenol into 4-aminophenol in the dark catalyzed by surface interaction on BiPO4/g-C3N4 nanostructures in the presence of NaBH4

“…9,10 In this regard, over the last decades, semiconductor catalysts have attracted wide attention for removing environmental pollutants or/and converting them into useful compounds for industrial use. 11,12 Numerous semiconductor materials with appropriate physicochemical or/and photochemical properties have been widely developed and used for the catalytic and photocatalytic transformation of compounds. 13,14 g-C 3 N 4 has been considered as one of the most successful pconjugated polymers over the last decades, due to its high stability, good absorption in the visible light and photoefficiency.…”

Halloysite Nanotubes: Smart Nanomaterials in Catalysis

“…Recently, Yang et al reported the immobilization of Co 3 O 4 nanoparticles onto HNTs by a non-aqueous deposition-precipitation, followed by thermal treatment, and they used the obtained nanomaterial as catalyst for the reduction of 4-nitrophenol and organic dyes [83].…”

Manipulation of the halloysite clay nanotube lumen for environmental remediation: a review

“…Probably for the convenience of preparation, metallic NPs are usually supported on the outer wall of halloysite nanotubes. 31,32,35 However, such exposed catalysts generally exhibit the following disadvantages: mechanical wear during use can easily cause the abscission of metallic NPs, thereby shortening the service life of the catalyst; moreover, small metallic NPs are prone to agglomerate or sinter at elevated temperatures, thereby reducing their catalytic activity.…”

“…[21][22][23][24][25][26][27][28][29][30] These reviews mainly focus on the excellent support function of the outer wall of clay nanotubes, which is related to its elongated nanorod (NR)-like shape. For example, various metallic NPs such as Cu, ZnO, α-Ni(OH) 2 , Co 3 O 4 and CeO 2 -WO 3 , [31][32][33][34][35][36] or functional organic molecules such as cucurbiturils, chitosan, polyaniline, hydrothermal carbon, organosilane and dopamine, [37][38][39][40][41][42] were supported on the outer wall of clay nanotubes to prepare advanced hybrid nanomaterials, and then used as high-…”