Surfactant-assistant and facile synthesis of hollow ZnS nanospheres

Hollow Micro‐/Nanostructures: Synthesis and Applications

“…[178,179] After the silica shell is formed by the hydrolysis and condensation of TEOS, the liquid PDMS cores can be easily removed by solvent extraction. [180] In addition to sol-gel processes, many other synthetic approaches, such as hydrothermal methods [158] and g-irradiation, [181][182][183][184] have been employed in combination with emulsion templating to synthesize hollow particles of various crystalline materials, including metals, [185,186] oxides [187] and sulfides, [157,188,189] and inorganic/polymer composites. [183,184] Bao et al synthesized Ni hollow spheres (300-450 nm) using NiSO 4 and NaH 2 PO 2 as precursor and reducing agent respectively.…”

General Route to the Fabrication of ZnS and M‐Doped (M = Cd2+, Mn2+, Co2+, Ni2+, and Eu3+) ZnS Nanoclews and a Study of Their Properties

“…The absorption-peak intensity that corresponds to MO molecules decreases gradually as the exposure time increases, which indicates the photodegradation of MO. For the purpose of comparison, the photocatalytic degradation of MO without catalyst and with commercial TiO 2 powders (P25; Degussa), ZnS nanocrystals prepared according to a literature method, [29] and ZnS hollow nanospheres prepared according to our previous work [30] was carried out, and the results are illustrated in Figure 6c. In this figure, C t is the absorption of MO at the wavelength of 464 nm, and C 0 is the absorption of MO after the adsorption equilibrium on photocatalysts before irradiation.…”

“…The mixture was later illuminated with an Hg lamp (100 W) or Xe lamp (300 W), during which a samples (3.0 mL) of the solution together with the catalyst were drawn at given time intervals to determine the concentration of the remaining reactant by using UV/Vis spectrophotometry; the solution was separated from the catalyst by settlement for about 15 min. For comparison purposes, commercial TiO 2 powders (P25; from Degussa), ZnS nanocrystals prepared according to a literature method, [29] and ZnS hollow nanospheres prepared according to our previous work [30] were also tested as references. The chemical stability of the ZnS nanoclew catalyst was further tested after five cycles of the reaction.…”

Preparation and characterization of ZnS nanoparticles deposited on montmorillonite

“…The preparation of ZnS nanoparticles often involves using an organic/surfactant stabilizer. Cetyltrimethylammonium (CTA) [7][8][9], sodium bis(2-ethylhexyl) sulfosuccinate [10,11], L-cysteine, mercaptoethanol [12] and other stabilizers [13][14][15][16][17], or different polymer assistants [18][19][20] were used to prevent the particles agglomeration keeping their size in the nano-range. CO 2 is a greenhouse gas representing the largest contribution of human activities.…”