Relatively cheap or at no cost, easily available, renewable agricultural waste has been given a new purpose. Using coconut shells as the raw material, and being obtained from agricultural, industry by-products, or even waste materials were used as carbon resource. Acid etching coconut shells carbon (AC) rendered micro/nanoscale hierarchical structures and made the surface available for further modification. Then, the surface of acidified coconut shell carbon was engineered via mussel inspired chemistry. The polydopamine functionalized AC composites (AC-PDA) were applied for efficient removal of methylene blue (MB) dye. Further, the surface morphology, and chemical structure were evaluated by means of scanning electron microscope (SEM) and Fourier transform infrared spectroscopy (FT-IR). Through the combination of acid etching and mussel inspired chemistry, organic functional groups can be successfully introduced onto the surface of the coconut shells carbon. The improvement of adsorption capacity of AC-PDA compared with AC is probably due to the increased number of active binding sites resulting from surface modification and formation of new functional groups.

相对便宜或免费的，易于获得的可再生农业废物已被赋予了新的目的。以椰子壳为原料，并从农业，工业副产品甚至废料中获取椰子壳作为碳源。酸蚀椰子壳碳（AC）呈现出微米/纳米级的分层结构，并使表面可用于进一步修饰。然后，酸化的椰子壳碳的表面通过贻贝激发了化学反应。聚多巴胺官能化的AC复合材料（AC-PDA）用于有效去除亚甲基蓝（MB）染料。此外，通过扫描电子显微镜（SEM）和傅立叶变换红外光谱（FT-IR）评价了表面形态和化学结构。通过酸蚀刻和贻贝激发化学的结合，有机官能团可以成功地引入到椰子壳碳表面。与AC相比，AC-PDA的吸附能力有所提高，这可能是由于表面改性和形成新的官能团导致活性结合位点数量增加所致。