Recently, removal of trace hazardous organic contaminants in the water is still a challenge work and attracting a growing number of concerning. Herein, a photo-responsive cellulose based intelligent imprinted material (PR-Cell-MIP) was fabricated through SI-ATRP (surface-initiates atom transfer radical polymerization) and employed for the selective adsorption of a typical pesticide residue, 2,4-dichlorophenoxyacetic acid (2,4-D). The characterization results showed that the obtained PR-Cell-MIP displayed 2-D petal-like laminar sheet and owned ample functional groups such as N=N, COCl and –COOH. The photo-responsive tests confirmed the excellent photo-isomerization property of PR-Cell-MIP, leading to a satisfactory regeneration during the 2,4-D adsorption. Batch adsorption experiments demonstrated that the 2,4-D adsorption followed Frendlich adsorption isotherm. Meanwhile, the higher equilibrium template bindings (89.03%), lower specific binding constant K_D (11.601 mg L^-1) and apparent maximum number Q_max (11.039 mg g^-1) suggested much higher adsorption performance of PR-Cell-MIP than that of the non-imprinted polymer (PR-Cell-NIP). The selectivity experiments revealed that PR-Cell-MIP presented better specificity towards 2,4-D than its structural analogues. In addition, the PR-Cell-MIP also displayed outstanding stability, reusability (8 cycles) and green regeneration. Furthermore, the selective adsorption and green regeneration were attributed to the exposure and blockage of specific recognition sites, allowing the precise and reversible switching of the host-guest interaction between receptor sites and 2,4-D. These findings will provides a fundamentally technical basis for the remediation of the trace hazardous pollutants.

近来，去除水中痕量有害有机污染物仍然是一项挑战性工作，并且引起越来越多的关注。本文中，通过SI-ATRP（表面引发原子转移自由基聚合）制备了基于光响应性纤维素的智能压印材料（PR-Cell-MIP），并将其用于选择性吸附典型的农药残留物2,4-二氯苯氧基乙酸酸（2,4-D）。表征结果表明，所得的PR-Cell-MIP具有2D花瓣状层状薄片，并具有充足的官能团，如N = N，COCl和–COOH。光响应测试证实PR-Cell-MIP具有出色的光异构化特性，从而在2,4-D吸附过程中产生令人满意的再生。分批吸附实验表明，2 4-D吸附跟随Frendlich吸附等温线。同时，较高的平衡模板结合率（89.03％），较低的特异性结合常数K_D（11.601 mg L ^-1）和最大表观数Q _max（11.039 mg g ^-1）表明PR-Cell-MIP的吸附性能比非压印聚合物（PR-Cell-NIP）更高。选择性实验表明，PR-Cell-MIP对2，4-D的特异性高于其结构类似物。此外，PR-Cell-MIP还表现出出色的稳定性，可重复使用性（8个循环）和绿色再生。此外，选择性吸附和绿色再生归因于特定识别位点的暴露和阻断，从而使受体位点与2,4-D之间的客体-客体相互作用能够精确且可逆地转换。这些发现将为补救微量有害污染物提供根本的技术基础。