Highly efficient and recyclable triple-shelled Ag@Fe3O4@SiO2@TiO2 photocatalysts for degradation of organic pollutants and reduction of hexavalent chromium ions

Nanoscale ◽  
2014 ◽  
Vol 6 (10) ◽  
pp. 5181 ◽  
Author(s):  
Jianwei Su ◽  
Yunxia Zhang ◽  
Sichao Xu ◽  
Shuan Wang ◽  
Hualin Ding ◽  
...  
Keyword(s):  
Hexavalent Chromium ◽  
Organic Pollutants ◽  
Tio2 Photocatalysts ◽  
Chromium Ions ◽  
Highly Efficient

scholarly journals A theoretical and experimental study of the adsorptive removal of hexavalent chromium ions using graphene oxide as an adsorbent

2020 ◽  
Vol 18 (1) ◽  
pp. 936-942
Author(s):  
Ardhmeri Alija ◽  
Drinisa Gashi ◽  
Rilinda Plakaj ◽  
Admir Omaj ◽  
Veprim Thaçi ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Hexavalent Chromium ◽  
Adsorption Energy ◽  
Density Functional ◽  
Noncovalent Interactions ◽  
Theoretical Calculations ◽  
Chemical Oxidation ◽  
Chromium Ions ◽  
Adsorption Sites ◽  
Vis Spectroscopy

AbstractThis study is focused on the adsorption of hexavalent chromium ions Cr(vi) using graphene oxide (GO). The GO was prepared by chemical oxidation (Hummers method) of graphite particles. The synthesized GO adsorbent was characterized by Fourier transform infrared spectroscopy and UV-Vis spectroscopy. It was used for the adsorption of Cr(vi) ions. The theoretical calculations based on density functional theory and Monte Carlo calculations were used to explore the preferable adsorption site, interaction type, and adsorption energy of GO toward the Cr(vi) ions. Moreover, the most stable adsorption sites were used to calculate and plot noncovalent interactions. The obtained results are important as they give molecular insights regarding the nature of the interaction between GO surface and the adsorbent Cr(vi) ions. The found adsorption energy of −143.80 kcal/mol is indicative of the high adsorptive tendency of this material. The adsorption capacity value of GO toward these ions is q = 240.361 mg/g.

Tannin cross-linked polyethyleneimine for highly efficient removal of hexavalent chromium

2021 ◽  
Author(s):  
Yupeng Shang ◽  
Gengzheng Zhu ◽  
Dexiang Yan ◽  
Qinze Liu ◽  
Tingting Gao ◽  
...  
Keyword(s):  
Hexavalent Chromium ◽  
Efficient Removal ◽  
Highly Efficient
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