A new self-crosslinked composite hydrogel is prepared with chitosan (CS) and cationic guar gum (CGG), based on the imine and acetal chemistry for gelation. The CS/CGG hydrogel exhibits thermal/pH responsiveness, injectability, adhesiveness and good compressive strength. The hydrogel is effective in removing phosphate from wastewater through an adsorption process, during which KH₂PO₄ is used as a phosphate model. The adsorption complies with the Freundlich model, indicating that it is a multilayered process with complex adsorption mechanisms. Considering their porous structure and nitrogen/phosphorus heteroatoms doping, the phosphate-adsorbed hydrogels are made into porous N,P doped carbon aerogels that can be potentially used as electrodes for a supercapacitor. The results indicate that these carbon aerogels possess excellent capacitive performance (best specific capacitance of 302.2 ± 4.9 F/g), as well as good cycling stability after 5000 times of charging/discharging.

基于壳聚糖（CS）和阳离子瓜尔胶（CGG），基于亚胺和缩醛化学凝胶化，制备了一种新的自交联复合水凝胶。CS / CGG水凝胶具有热/ pH响应性，可注射性，粘合性和良好的抗压强度。水凝胶通过吸附过程有效去除废水中的磷酸盐，在此过程中，KH ₂ PO ₄用作磷酸盐模型。吸附符合Freundlich模型，表明它是具有复杂吸附机制的多层过程。考虑到它们的多孔结构和氮/磷杂原子的掺杂，磷酸盐吸附的水凝胶被制成多孔的N，P掺杂的碳气凝胶，可以潜在地用作超级电容器的电极。结果表明，这些碳气凝胶具有出色的电容性能（最佳比电容为302.2±4.9 F / g），并且经过5000次充放电后具有良好的循环稳定性。