Halloysite-Based Magnetic Nanostructures for Diverse Applications: A Review

Abstract

Halloysite nanotubes (HNTs) have emerged as one of the promising clay minerals that have myriad applications due to their unique properties. The presence of silica and alumina groups on the outer and inner surfaces allows surface modifications with different functional compounds. Depending on the applications required, numerous desired compounds have been used for both inner and outer surface modifications to construct hybrid noanostructures which further enhance their physiochemical properties. This review discusses the surface design with special emphasis on magnetic nanoparticles to fabricate HNT-based magnetic nanostructures which display synergistic effects and summarizes potential applications in the fields of catalysis, magnetically driven drug delivery, chemotherapy/diagnosis, environmental remediation, emulsification, and microwave absorption.

Nanoscale Ion-Exchange Materials: From Analytical Chemistry to Industrial and Biomedical Applications

“…Of these NIEs, chitosan possesses perhaps the best combination of properties that makes it favorable for a plethora of applications [ 49 , 50 , 51 ], some of which are discussed below (see Section 4 ). Another inexpensive and easy-to-produce alternative to synthetic NIEs is halloysite, a natural clay material with a nanotubular structure [ 52 ] which can be converted into effective cation NIEs in one of two ways ( Figure 1 ; see also [ 53 ]).…”