Iron oxide magnetic nanoparticles: A short review

Preparation of the Magnetic Composite Materials Fe3O4/ Hydroxyapatite and Its Application for Removal of 2,4-D and Chrysoidine Crystal

“…Các hạt nano oxit sắt đã được chứng minh là có độc tính thấp và tính tương thích sinh học. Do đó, nó chủ yếu được nghiên cứu trong lĩnh vực y học như là một tác nhân dẫn truyền thuốc [1,2], và ________ * Tác giả liên hệ. Địa chỉ email: hoannx@vnu.edu.vn https://doi.org/10.25073/2588-1140/vnunst.5110 trong lĩnh vực xử lý môi trường như là một chất xúc tác quang hóa cho quá trình phân hủy của thuốc nhuộm [3], hoặc được sử dụng như một chất hấp phụ nano để loại bỏ các chất ô nhiễm kim loại, đặc biệt là trong việc loại bỏ asen [4].…”

Oxidation-assisted alkaline precipitation of nanoparticles using gas-diffusion electrodes

“…7 In light of the increasing interest in these materials, we recently demonstrated the role of the oxidation-assisted alkaline precipitation (Ox-AP) mechanism in synthesizing metal (oxy) (hydr)oxide nanoparticles with smaller sizes and more narrow size distributions than achievable with the traditional alkaline precipitation (AP) mechanism. 8 While the AP mechanism constitutes the reaction of an alkali (e.g., OH − ) with a metal ion to form a sparingly soluble metal (oxy)(hydr)oxide (nano) particle, [9][10][11][12][13] Ox-AP constitutes the simultaneous reaction of an alkali and an oxidant (e.g., H 2 O 2 ) with a metal ion in solution to form sparingly soluble metal (oxy)(hydr)oxide (nano) particles of a higher oxidation state. 8 In general, chemical precipitation consist of three stages: stage 1 before precipitation, stage 2 during precipitation and stage 3 after precipitation.…”

“…The goal of this work was to benchmark this promising GDEx method against the alkaline titration (AT) method, a proven AP method for the production of metal (oxy)(hydr) oxide nanoparticles. [9][10][11][12][13] ). Recently, AT of ZnCl 2 was investigated in-depth and was demonstrated to be a good case to compare other cases against.…”

Hybrid Composite Based on Magnetite/ Chitosan for 2,4-D and Chrysoidine Removal

“…On this basis, iron oxide nanoparticles such as magnetite and maghemite are the most studied magnetic materials, which can be easily synthesized in the laboratory [2]. Furthermore, iron oxide nanoparticles have been proved to have low toxicity and biocompatibility, so it is mainly studied in the field of medicine as a drug delivery agent [3,4], and in the field of environmental remediation as a photocatalyst for degradation of dyes [5] or as a nano-adsorbent for the arsenic removal [6]. However, iron oxide nanoparticles also have limitations as it is susceptible to oxidation under environmental conditions, small specific surface area and it is not effective with organic contamination.…”