We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Fabrication of magnetic Fe<sub>3</sub>O<sub>4</sub>@SiO<sub>2</sub>@Bi<sub>2</sub>O<sub>2</sub>CO<sub>3</sub>/rGO composite for enhancing its photocatalytic performance for organic dyes and recyclability.
- Authors
Su, Gang; Liu, Lihua; Zhang, Lixing; Liu, Xing; Xue, Jianrong; Tang, Anping
- Abstract
A novel magnetic Fe3O4@SiO2@Bi2O2CO3/rGO composite comprising of uniform core-shell-structured Fe3O4@SiO2@Bi2O2CO3 microspheres mounted on reduced graphene oxide (rGO) sheets was successfully fabricated by using a facile hydrothermal method. The adsorption–desorption isotherm of Fe3O4@SiO2@Bi2O2CO3/rGO belonged to type IV with an H4-type hysteresis loop. The specific surface areas and magnetization saturation value (Ms) of Fe3O4@SiO2@Bi2O2CO3/rGO (x = 0.15 g) were 102.12 m2/g and 25.4 emu/g, respectively. Fe3O4@SiO2@Bi2O2CO3/rGO (x = 0.15 g) exhibited remarkable photocatalytic degradation activity and mineralization effect for MO and decolorization performance for the mixed solution of MO, Rh B, and MB. MO degradation by Fe3O4@SiO2@Bi2O2CO3/rGO conformed to a first-order kinetic reaction, and the corresponding kapp value was 0.05553 min−1. A suitable amount of rGO in Fe3O4@SiO2@Bi2O2CO3/rGO could decrease the energy band gap, inhibit the recombination of photo-induced electron/hole (e−/h+) pair, and broaden and enhance the response of the catalyst to visible light, thereby enhancing the visible-light catalytic degradation of organic dyes. The active species produced in the photocatalysis included •O2−, •OH, and h+, with •O2− being the dominant active species. The as-prepared photocatalyst also showed excellent magnetic separation performance and stability. Results show that the as-prepared Fe3O4@SiO2@Bi2O2CO3/rGO composite is a promising photocatalyst with considerable application potential in organic dyes removal.
- Subjects
PHOTODEGRADATION; PHOTOCATALYSTS; HYSTERESIS loop; MAGNETIC separation; COLOR removal in water purification; ORGANIC dyes; VISIBLE spectra
- Publication
Environmental Science & Pollution Research, 2021, Vol 28, Issue 36, p50286
- ISSN
0944-1344
- Publication type
Article
- DOI
10.1007/s11356-021-14248-z