Synthesis of microporous eskolaite from Cr(VI) using activated carbon as a reductant and template

详细信息	查看全文 | 推荐本文 |

• 作者：A. Cruz-Espinoza^a ; V. Ibarra-Galvá ; n^a ; A. Ló ; pez-Valdivieso^b ; ^{alopez@uaslp.mx} ; J. Gonzá ; lez-Gonzá ; lez^a
• 关键词：Chromium oxide ; Eskolaite ; Activated carbon ; Synthesis ; Adsorption ; Dichromate
• 刊名：Journal of Colloid and Interface Science
• 出版年：2012
• 期刊代码：125_00219797
• 类别：ch
• 出版时间：15 May, 2012
• 卷：374
• 期：1
• 页码：321-324
• 文件大小：717 K

摘要

A novel technique has been devised for the synthesis of microporous 伪-Cr₂O₃ (eskolaite). The technique was based on the formation of amorphous-Cr₂O₃ onto microporous activated carbon through adsorption-reduction of dichromate ions at the activated carbon/aqueous solution interface. Then, the Cr₂O₃-loaded carbon was thermally processed under oxidizing conditions to remove the carbon and recover the chromium oxide as 伪-Cr₂O₃. Both the Cr₂O₃-loaded carbon and the synthetic product were characterized by XRD, SEM, surface area and pore volume measurements. The synthetic eskolaite assayed 97.3%Cr₂O₃ and its specific surface area was 15.48 m²/g and pore size of 16.1 脜.