Halloysite Nanotubes: Green Nanomaterial for Functional Organic‐Inorganic Nanohybrids

Abstract

The unique one-dimensional nanoporous structure and the reactive external and internal surfaces make halloysite nanotube (HNT) an interesting nanomaterial for various applications. HNT is a green nanomaterial because it is easily available from abundant deposits in nature and is biocompatible with low cytotoxicity. After a brief introduction on the structure of HNT, recent advances in surface modification of HNT and its functional organic-inorganic nanohybrids including hybrid nanocontainers, flame retardant nanocomposites, dye removal adsorbents, liquid marbles, and superamphiphobic coatings are introduced.

Past, Present and Future Perspectives on Halloysite Clay Minerals

“…Furthermore, HNTs are available at the scale of thousands of tons, compared to gram-scale for CNTs, and conversely to the latter they are biocompatible materials [ 9 ]. Compared with imogolite nanotubes, which are also naturally occurring, the pore size of HNTs is much larger; whereas conversely to boron nitride, which is chemically inert, HNTs can be modified on their surfaces by the grafting of suitable groups [ 10 ].…”

Influence of water evaporation/absorption on the stability of glycerol–water marbles

“…Under the action of external forces, a liquid marble can be split into two smaller liquid marbles without the spreading of liquids, showing a unique self-healing behavior. 19,22 When two liquid marbles are placed in contact, coalescence may occur by different coalescence techniques such as impact, magnetic force, vertical collision and direct-current voltage. [23][24][25][26][27] Given the exibility in the choice of solid particles and liquids to fabricate liquid marbles, liquid marbles are emerging as a versatile platform for a wide range of applications in miniature reactors, microuidics, drug transport, gas sensing, and biomedical and genetic analyses.…”

Pd-catalyzed enantioselective C–H arylation of phosphinamides with boronic acids for the synthesis of P-stereogenic compounds

“…The most commonly used methods for the preparation of Pstereogenic molecules have mainly relied on resolution, [24][25][26] chiral-auxiliary-aided asymmetric synthesis, [27][28][29][30][31][32][33][34] and asymmetric lithiation-trapping reactions. [35][36][37][38] Other alternative methods include the NHC-catalyzed desymmetrization of bisphenolic phosphinates, 39 the metal-catalyzed asymmetric cross-coupling of phosphines or phosphine oxides, [40][41][42][43][44][45] hydrophosphination of olefins, 46 addition reactions of phosphorus nucleophiles, 47,48 and olefin metathesis of divinyl phosphinates.…”