Department of Environmental Science, Zhejiang University , Hangzhou 310058, China.
Zhejiang Provincial Key Laboratory of Organic Pollution Process and Control, Hangzhou 310058, China.
Environ Sci Technol. 2017 Nov 7;51(21):12644-12652. doi: 10.1021/acs.est.7b03639. Epub 2017 Oct 25.
A sugar cane-converted graphene-like material (FZS900) was fabricated by carbonization and activation. The material exhibited abundant micropores, water-stable turbostratic single-layer graphene nanosheets, and a high BET-N surface area (2280 m g). The adsorption capacities of FZS900 toward naphthalene, phenanthrene, and 1-naphthol were 615.8, 431.2, and 2040 mg g, respectively, which are much higher than those of previously reported materials. The nonpolar aromatic molecules induced the turbostratic graphene nanosheets to agglomerate in an orderly manner, forming 2-11 graphene layer nanoloops, while polar aromatic compounds induced high dispersion or aggregation of the graphene nanosheets. This phase conversion of the nanosized materials after sorption occurred through coassembly of the aromatic molecules and the single-layer graphene nanosheets via large-area π-π interactions. An adsorption-induced partition mechanism was further proposed to explain the nanosize effect and nanoscale sorption sites observed. This study indicates that commonly available biomass can be converted to graphene-like material with superhigh sorption ability in order to remove pollutants from the environment via nanosize effects and a coassembly mechanism.
一种由碳化和活化制备的甘蔗转化的类石墨烯材料（FZS900）。该材料具有丰富的微孔、水稳定的乱层单层石墨烯纳米片和高 BET-N 比表面积（2280 m g）。FZS900 对萘、菲和 1-萘酚的吸附容量分别为 615.8、431.2 和 2040 mg g，远高于以前报道的材料。非极性芳香分子诱导乱层石墨烯纳米片有序聚集，形成 2-11 层石墨烯纳米环，而极性芳香化合物则导致石墨烯纳米片高度分散或聚集。这种吸附后纳米材料的相转变是通过芳香分子和单层石墨烯纳米片之间的大面积π-π相互作用进行共组装来实现的。进一步提出了一种吸附诱导分配机制来解释观察到的纳米尺寸效应和纳米级吸附位点。本研究表明，可将常见的生物质转化为具有超高吸附能力的类石墨烯材料，通过纳米尺寸效应和共组装机制从环境中去除污染物。
