Cellulose paper-based material: An efficient strategy of adjustable adsorption and enriched photodegradation toward multitasking environment remediation

Environmental remediation with the introduction of multiple driving forces has attracted much attention. Reasonable design of advanced paper-based materials with enhanced degradation capability, switchable adsorption process and excellent operation efficiency for wastewater remediation is desirable but challenging. In this work, by flexibly utilizing oxidative polymerization and self-assembly layer-by-layer strategy, a hierarchical cellulose paper-based material containing rough reactive top layer and photocatalytic bottom layer was successfully fabricated for multitasking wastewater repairing activities. A synergistic mechanism between the modified conjugated polymer and doped Fe was developed, achieving the rapid transfer of electrons through "two-channel" effect, thus sensitizing material. Through the introduction of self-cyclic Fenton system, enhanced photodegradation capability (98.3%) for organic pollutants was realized. The amino-rich polymer was introduced on the composites to develop the multitasking application, which successfully endowed material with the characteristic of high adsorption capacity (167.79 mg center dot g(-1)), rapid adsorption rate (50 min) and dynamic-static adjustable adsorption. Benefiting from such peculiarities, effective and low-cost treatment of complex and high toxic industrial wastewater prior to discharge was achieved. The reported material was facile-prepared and demonstrated cost-effective application, operation flexibility and stable regeneration advantages, is promising to achieve real-world applications. This work significantly contributed to the development of advanced paper-based materials for multitasking environmental remediation.