Flower-, wire-, and sheet-like MnO_2-deposited diatomites:Highly efficient absorbents for the remova

• 作 者: Yucheng Du Liping Wang Jinshu Wang Guangwei Zheng Junshu Wu Hongxing Dai
• 机 构: Key Lab of Advanced Functional Materials, Ministry of Education, College of Materials Science and En
• 出 处: Journal of Environmental Sciences
• 发表日期: 2015年03期
• 关键词: sheet hydrothermal abundant giving chromium numerous flower hydroxyl Highly isot

Flower-, wire-, and sheet-like MnO2-deposited diatomites have been prepared using a hydrothermal method with Mn(Ac)2, KMnO4and/or MnSO4 as Mn source and diatomite as support. Physical properties of the materials were characterized by means of numerous analytical techniques, and their behaviors in the adsorption of chromium(VI) were evaluated.It is shown that the MnO2-deposited diatomite samples with different morphologies possessed high surface areas and abundant surface hydroxyl groups(especially the wire-like MnO2/diatomite sample). The wire-like MnO2/diatomite sample showed the best performance in the removal of Cr(VI), giving the maximum Cr(VI) adsorption capacity of 101 mg/g.

Flower-, wire-, and sheet-like MnO2-deposited diatomites have been prepared using a hydrothermal method with Mn (Ac) 2, KMnO4and / or MnSO4 as Mn source and diatomite as support. Physical properties of the materials were characterized by means of multiple analytical techniques, and their behaviors in the adsorption of chromium (VI) were used. It is shown that the MnO2-deposited diatomite samples with different morphologies possessed high surface areas and abundant surface hydroxyl groups (especially the wire-like MnO2 / diatomite samples The wire-like MnO2 / diatomite sample showed the best performance in the removal of Cr (VI), giving the maximum Cr (VI) adsorption capacity of 101 mg / g.