Hierarchically Nanostructured Barium Sulfate Fibers

Abstract

BaSO(4) nanostructures with controlled morphologies were successfully produced via one-step process through precipitation of BaSO(4) in aqueous and organic media. The synthesis is carried out by mixing solutions of BaCl(2) and Na(2)SO(4) in presence of EDTA (disodium ethylenediaminetetraacetic acid) at room temperature. The influence of the reaction conditions such as initial reactants concentration, pH, EDTA/[Ba(2+)] ratio and aging on the BaSO(4) nanoparticles organization is studied. Using EDTA in aqueous media, spherical secondary particles of 500 nm diameter are obtained, which are formed by 4 nm size primary particles. With dimethyl sulfoxide and small amounts of water (5%) and EDTA, the aging process allows the production of long homogeneous fibers, related to hierarchical organization of BaSO(4) nanoparticles. Direct observation of self-assembling of primary particles by HRTEM allows proposing a mechanism for fiber formation, which is based on multipolar attractions that lead to a brick-by-brick organization along a preferential orientation. Results evidence the role of EDTA as controlling agent of the morphology and primary and secondary mean particle size.

Synthesis and Characterization of Barium Sulphate from Acid Mine Drainage

“…The spectrum of the barite crystals contained all the major peaks referring to JCPDS file No. 24-1035 which is in good agreement with the results reported in the literature (Zhao et al, 2007;Romero-Ibarra et al 2010;Sun et al 2013;Wang et al 2005;Wu et al, 2013). The mineral phase of the crystal precipitate was barite.…”

Spectroscopic studies and antibacterial activities of pure and various levels of Cu-doped BaSO4 nanoparticles

“…Barium sulphate, which is commonly known as Barite and inert in lots chemical reactions, has been extensively used in many areas such as catalyst carriers [17,18], adsorbent materials [19,20], printing ink [21], engineering plastics [22], biomedical devices [23], fillers and add-ons in polymers [22,24]. BaSO 4 is used in paints and coatings for stabilization of pigments against flocculation and show high transparency.…”

Formation and Application of High Reflectivity Controllable Barium Sulfate Microspheres

“…In addition, barium sulfate particles with complex structures, such as fiber bundles [6], peanuts [7], and almonds [8], have been synthesized. The morphology and particle size of barium sulfate determine its application path.…”