MnO2 Submicroparticles from Chinese Brush and Their Application in Treatment of Methylene Blue Contaminated Wastewater.

Qi Wang,Wanjun Li,Meng Fan,Chunlei Ma,Songdong Li,Lihua Ma

doi:10.17344/acsi.2016.2780

Abstract

Eggshell membrane (ESM) is selected as biotemplate to prepare MnO2 submicroparticles (SMPs) using Chinese Brush with sodium hydroxide solution. The size with average 710 nm of the obtained materials is in good consistency with the microsructured biotemplate. An efficient and convenient absorbent for methylene blue (MB) is developed. The removal efficiency could reach up to 93% in 35 min under room temperature without pH adjusting owing to the excellent adsorption from ESM itself and hydroxyl group formed on the surface of MnO2 crystal in the aqueous solution. Materials on the membrane can be separated from the wastewater simply to avoid the secondary pollution caused by the leak of material. This interesting approach to MnO2 SMPs and facile operation for MB adsorption could open a new path to the submicro-materials based wastewater treatment.

Highlights

Synthesis of inorganic materials by biotemplating as a burgeoning technique has emerged for years in a wide variety of research fields.[1]
The removal efficiency could reach up to 93% in 35 min under room temperature without pH adjusting owing to the excellent adsorption from Eggshell membrane (ESM) itself and hydroxyl group formed on the surface of MnO2 crystal in the aqueous solution
Scheme 1 displays the schematic diagram of the synthesis process of submicro-structured MnO2 on ESM using Chinese Brush

Summary

Introduction

Synthesis of inorganic materials by biotemplating as a burgeoning technique has emerged for years in a wide variety of research fields.[1]. Biotemplates like organisms (butterfly wing,[2] hair,[3] wood fiber[4,5] and pollen6), microorganisms (bacteria,[7,8] fungus,[9,10] and viruses11) and biological macromolecules (DNA,[12,13,14] RNA,[15] proteins,[16,17,18,19] and polysaccharides20) were reported to prepare inorganic materials Among these templates, proteins have gained more popularity by researchers,[21] ranging from ferritin,[22,23,24,25] bovine serum albumin (BSA)[26,27,28,29,30,31] to collagen[32,33,34]. Combining the adsorption capacities of both ESM itself[57] and hydroxyl groups formed on the surface of MnO2 in the aqueous media, these accessible MnO2 SMPs are applied successfully to the treatment of methylene blue (MB) wastewater

Experimental

Results and Discussion

Conclusions