Recent Advances on Surface Modification of Halloysite Nanotubes for Multifunctional Applications

Abstract

Halloysite nanotubes (HNTs) are natural occurring mineral clay nanotubes that have excellent application potential in different fields. However, HNTs are affected by size effect, surface electron effect and hydrogen bond formation on the surface which lead to weak affinity and prone to reunion at some extent. It is very significant to modify the HNTs' surface for expand its applications. In this review, the structural characteristics, performance and the related applications of surface modification HNTs are reviewed and summarized. we focus on the surface modified methods of HNTs, the effect of surface modification on materials and its related applications in various regions. In addition, future prospects and the meaning of surface modification have been discussed in HNTs studies. This review provided a reference for the application of HNTs modifications in new fields.

Ex Situ Fabrication of Polypyrrole-Coated Core-Shell Nanoparticles for High-Performance Coin Cell Supercapacitor

“…Proper control of the shape of the PPy is very important for high performance in a variety of applications, such as supercapacitors, chemical sensors, solar cells (SCs), fuel cells (FCs) and so forth [ 3 , 4 , 5 , 6 , 7 , 8 ]. When PPy is made of nanomaterials, it has following advantages over bulk materials: (1) higher surface area; (2) better reactivity; (3) enhanced electrical conductivity [ 1 , 2 , 4 , 6 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 ]. Studies on the synthesis of nanomaterials with various shapes such as nanorods (NRs), nanoparticles (NPs), and nanotubes (NTs) have been carried out using template-mediated methodologies [ 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 ].…”

“…Among the various nanomaterials, the core-shell is very suitable as a stable electrode material because the Si core can protect the CP shell from swelling and shrinkage problems [ 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 ]. In addition, the high surface area of the Si cores enable rapid adsorption/desorption of electrolyte ions within the electrodes [ 19 ].…”

Mineralogy and Physico-Chemical Data of Two Newly Discovered Halloysite in China and Their Contrasts with Some Typical Minerals

“…Based on the hollow nanotubular morphology, large surface area, high porosity, non-toxicity, good thermal stability and biocompatibility, as well as adjustable surface properties of halloysite mineral [13][14][15]. Significant attention has been focused on the application of halloysite into many fields in these years, such as the applications in chemically blocked and controlled release [16][17][18][19][20][21], biomimetic nanoreactors [22][23][24], medicine carrier and biological antibacterial materials [25][26][27], catalysis supports [28][29][30][31][32], hydrogen storage matrix [33][34][35], food packaging applications [36], mineral templates and other functional materials [37][38][39].…”

Direct Observation of Inner-Layer Inward Contractions of Multiwalled Boron Nitride Nanotubes upon in Situ Heating

“…In the recent decades, one-dimensional (1D) tubular nanomaterials, notably the carbon-based nanotubes and the mineral-based nanotubes [ 1 , 2 , 3 ], have attracted a great deal of attention for many applications because of their novel physical properties [ 4 , 5 , 6 ]. Carbon nanotubes (CNTs) are one prominent example, and exhibit rich transport properties including insulating, semiconducting and metallic behaviors, depending on the tubular chirality [ 7 ].…”