Hierarchical mesoporous carbon nanosheets were synthesized by using gallic acid and zinc organic-inorganic (Zn-GA) hybrids as templates. After carbonization and removal of ZnO nanoparticles by diluted HCl, carbon nanosheets with a thickness of 11–16 nm were formed and arranged like a completely-opened-erected book. The carbon nanosheets possessed mesopores (centered at 6.5 and 23.4 nm) and macropores and had high surface areas (786 m² g⁻¹) and large pore volumes (1.57 cm³ g⁻¹). The thin thickness and high amount of mesopores of the carbon nanosheets ensured short diffusion path and largely available inner and outer adsorptive sites of the carbon nanosheet. The hierarchical structure of the carbon nanosheets avoided the thin nanosheets from aggregation during adsorption of organic pollutants in water solution. The obtained hierarchical mesoporous carbon (HMC) nanosheets were used as adsorbents to remove 2,4,6-trichlorophenol (TCP) from water. As a result, the HMC nanosheets showed fast adsorption rate and significantly higher adsorption capacity (833 mg g⁻¹) to TCP than other mesoporous carbon materials.

以没食子酸和锌有机-无机（Zn-GA）杂化物为模板合成了介孔碳纳米片。碳化并用稀盐酸去除ZnO纳米颗粒后，形成厚度为11–16 nm的碳纳米片，并像完全打开的书本一样排列。碳纳米片具有中孔（居中位于6.5和23.4 nm）和大孔，具有高表面积（786 m ²  g ^-1）和大孔体积（1.57 cm ³  g ^-1））。碳纳米片的薄厚度和大量的中孔确保了碳纳米片的短扩散路径和大量可用的内部和外部吸附位点。碳纳米片的分层结构避免了薄纳米片在水溶液中吸附有机污染物的过程中聚集。所获得的分层中孔碳（HMC）纳米片用作吸附剂，以从水中去除2,4,6-三氯苯酚（TCP）。结果，与其他中孔碳材料相比，HMC纳米片显示出快速的吸附速率和对TCP的显着更高的吸附容量（833 mg g ^-1）。