Abstract
In this study, we systematically investigated the effects of sulfuric acid treatment on the physico-chemical and pore characteristics of halloysite. XRD results indicate that sulfuric acid will destroy the crystal structure of halloysite and finally turn it into amorphous silica. The acid will react with halloysite nanotubes from both inner and outer surfaces, dissolve the [AlO6] octahedral layers and led to the rupture and collapse of [SiO4] tetrahedral layers. The BET surface area and total pore volume of halloysite increase firstly with treatment times from 1 to 13h, and then start to decrease due to disaggregation of silica layers. The acid treated halloysites exhibit fixed micropore and controllable mesopore size distributions and are effective low-cost adsorbents. The maximum adsorption capacity of acid treated halloysite for methylene blue is more than 60mgg−1 and can be controlled by pH values. Furthermore, the acid treated halloysite are potential supporters for enzyme, drug, sensors, and so on.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Colloids and Surfaces A: Physicochemical and Engineering Aspects
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
