Next Article in Journal
Mineralogical and Geochemical Characteristics of Trace Elements in the Yongdingzhuang Mine, Datong Coalfield, Shanxi Province, China
Next Article in Special Issue
Halloysite Nanotubes as an Effective and Recyclable Adsorbent for Removal of Low-Concentration Antibiotics Ciprofloxacin
Previous Article in Journal
The Effects of Sodium Ions, Phosphorus, and Silicon on the Eco-Friendly Process of Vanadium Precipitation by Hydrothermal Hydrogen Reduction
Previous Article in Special Issue
Distribution and Characteristics of Nanotubular Halloysites in the Thach Khoan Area, Phu Tho, Vietnam
Article Menu
Issue 7 (July) cover image

Export Article

Open AccessArticle
Minerals 2018, 8(7), 296;

Selective Fabrication of Barium Carbonate Nanoparticles in the Lumen of Halloysite Nanotubes

Key Laboratory for Mineral Materials and Application of Hunan Province, Central South University, Changsha 410083, China
Centre for Mineral Materials, Department of Inorganic Materials, School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China
Department of Chemistry, Unit 3060, University of Connecticut, Storrs, CT 06269-3060, USA
Author to whom correspondence should be addressed.
Received: 21 May 2018 / Revised: 25 June 2018 / Accepted: 4 July 2018 / Published: 11 July 2018
(This article belongs to the Special Issue Mineral Materials)
Full-Text   |   PDF [8588 KB, uploaded 11 July 2018]   |  


Barium carbonate (BaCO3) materials with the controllable morphology of nanoparticles were selectively loaded into the lumen halloysite nanotubes (abbreviated as Hal) by a urease assisted catalytic implementation strategy. The Hal mineral was pre-treated through leaching by hydrochloric acid (abbreviated as A-Hal), resulting in increased defect sites and zeta potential. The negatively charged urease was loaded inside the positively charged A-Hal lumen, and then through the decomposition of urea catalyzed by urease to produce carbonate ions and ammonia. When Ba2+ diffused in, BaCO3 particles were selectively synthesized in the lumen of A-Hal, the pore channels of A-Hal effectively controlled the growth and aggregation of BaCO3 nanocrystals and their geometrical morphology. The obtained BaCO3/A-Hal-T was characterized by transmission electron microscopy, Fourier transformation infrared spectroscopy and X-ray diffraction, differential scanning calorimetry-thermogravimetry (DSC-TG). The BaCO3/A-Hal-T may provide a candidate for potential applications. View Full-Text
Keywords: halloysite; urease; barium carbonate; selective decoration; nanoreactors halloysite; urease; barium carbonate; selective decoration; nanoreactors

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

Share & Cite This Article

MDPI and ACS Style

Ouyang, J.; Mu, D.; Zhang, Y.; Yang, H.; Suib, S.L. Selective Fabrication of Barium Carbonate Nanoparticles in the Lumen of Halloysite Nanotubes. Minerals 2018, 8, 296.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics



[Return to top]
Minerals EISSN 2075-163X Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top