AI Article Synopsis
- A novel hydrogel called CCHBi, made from cellulose nanofibrils and carbon dots, effectively removes lignin pollution with an impressive adsorption capacity of 435.0 mg/g, significantly outperforming commercial activated carbon.
- CCHBi's effectiveness is due to its 3D porous structure, enhancing surface area and providing more sorption sites, as well as a high photocatalytic degradation rate 3.1 times better than that of BiO/BiOCOOH.
- The material also exhibits strong stability, maintaining an 85% removal efficiency over ten cycles, highlighting its potential for practical applications in wastewater treatment.
Article Abstract
A novel photocatalytic adsorbent, a cellulose nanofibrils based hydrogel incorporating carbon dots and BiO/BiOCOOH (designated as CCHBi), was developed to address lignin pollution. CCHBi exhibited an adsorption capacity of 435.0 mg/g, 8.9 times greater than that of commercial activated carbon. This enhanced adsorption performance was attributed to the 3D porous structure constructed using cellulose nanofibrils (CNs), which increased the specific surface area and provided additional sorption sites. Adsorption and photocatalytic experiments showed that CCHBi had a photocatalytic degradation rate constant of 0.0140 min, 3.1 times higher than that of BiO/BiOCOOH. The superior photocatalytic performance of CCHBi was due to the Z-scheme photocatalytic system constructed by carbon dots-loaded cellulose nanofibrils and BiO/BiOCOOH, which facilitated the separation of photoinduced charge carriers. Additionally, the stability of CCHBi was confirmed through consecutive cycles of adsorption and photocatalysis, maintaining a removal efficiency of 85 % after ten cycles. The enhanced stability was due to the 3D porous structure constructed by CNs, which safeguarded the BiO/BiOCOOH. This study validates the potential of CCHBi for high-performance lignin removal and promotes the application of CNs in developing new photocatalytic adsorbents.
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| http://dx.doi.org/10.1016/j.carbpol.2024.122601 | DOI Listing |
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