title: One-pot mass self-assembly of MnO2sponge-like hierarchical nanostructures through a limited hydrothermal reaction and their environmental applications.
abstract: We report an environmentally-responsible limited hydrothermal reaction to construct gram-scale MnO2sponge-like hierarchical nanostructures composed of ultrathin nanosheets (∼5nm) in one pot. This template-free strategy simultaneously avoids the disposal of toxic materials and provides novel metal oxide nanostructures. As a typical application, the MnO2hierarchical nanostructures prepared can easily remove positively-charged methylene blue in water with much more adsorption capacity than those of commercial carbon grain and MnO2microparticles, TiO2and Fe2O3nanoparticles. Meanwhile, the solid-liquid separation is ready due to higher density resulted from their hierarchical nanostructures. Importantly adsorbed methylene blue can be reclaimed after elution with ethanol. Remarkably, the sponge-like hierarchical nanostructures can be recycled for many times with no obvious loss of adsorption capacity, qualifying them as a great potential application in environmental protection and resource reuse.
authors.affiliation: Beijing National Laboratory for Molecule Sciences, CAS Key Lab of Colloid, Interface and Chemical Thermodynamics, Institute of Chemistry, Chinese Academy of Sciences Zhongguancun North First Street 2, 100190 Beijing, China.
authors.forename: Jinbo
authors.initials: J
authors.lastname: Fei
authors.affiliation: Beijing National Laboratory for Molecule Sciences, CAS Key Lab of Colloid, Interface and Chemical Thermodynamics, Institute of Chemistry, Chinese Academy of Sciences Zhongguancun North First Street 2, 100190 Beijing, China.
authors.forename: Jie
authors.initials: J
authors.lastname: Zhao
authors.affiliation: Beijing National Laboratory for Molecule Sciences, CAS Key Lab of Colloid, Interface and Chemical Thermodynamics, Institute of Chemistry, Chinese Academy of Sciences Zhongguancun North First Street 2, 100190 Beijing, China.
authors.forename: He
authors.initials: H
authors.lastname: Zhang
authors.affiliation: National Centre for Nanoscience and Technology, Beijing 100190, China.
authors.forename: Anhe
authors.initials: A
authors.lastname: Wang
authors.affiliation: Beijing National Laboratory for Molecule Sciences, CAS Key Lab of Colloid, Interface and Chemical Thermodynamics, Institute of Chemistry, Chinese Academy of Sciences Zhongguancun North First Street 2, 100190 Beijing, China.
authors.forename: Chenchen
authors.initials: C
authors.lastname: Qin
authors.affiliation: Beijing National Laboratory for Molecule Sciences, CAS Key Lab of Colloid, Interface and Chemical Thermodynamics, Institute of Chemistry, Chinese Academy of Sciences Zhongguancun North First Street 2, 100190 Beijing, China.
authors.forename: Peng
authors.initials: P
authors.lastname: Cai
authors.affiliation: Beijing National Laboratory for Molecule Sciences, CAS Key Lab of Colloid, Interface and Chemical Thermodynamics, Institute of Chemistry, Chinese Academy of Sciences Zhongguancun North First Street 2, 100190 Beijing, China.
authors.forename: Xiyun
authors.initials: X
authors.lastname: Feng
authors.affiliation: Beijing National Laboratory for Molecule Sciences, CAS Key Lab of Colloid, Interface and Chemical Thermodynamics, Institute of Chemistry, Chinese Academy of Sciences Zhongguancun North First Street 2, 100190 Beijing, China; National Centre for Nanoscience and Technology, Beijing 100190, China. Electronic address: jbli@iccas.ac.cn.
authors.forename: Junbai
authors.initials: J
authors.lastname: Li
keywords: Hierarchical nanostructure; Hydrothermal reaction; Metal oxide; Nanosheet; Self-assembly