Journal
FRONTIERS IN CHEMISTRY
Volume 9, Issue -, Pages -Publisher
FRONTIERS MEDIA SA
DOI: 10.3389/fchem.2021.717210
Keywords
Pistia stratiotes; cadmium sulfide; photocatalyst; phytoaccumulation; degradation
Categories
Funding
- Project of Fujian Provincial Department of Science and Technology, China [2020J01564]
- Guangdong Science and Technology Program [2020B121201003]
- Science Fund for Distinguished Young Scholars of Fujian Agriculture and Forestry University [xjq201904]
- Special Fund for Scientific and Technological Innovation of Fujian Agriculture and Forestry University [CXZX2020068A, CXZX2020024A, CXZX2019005S]
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This study successfully recycled cadmium-contaminated water bodies using Pistia stratiotes and transformed it into a carbon-supported cadmium sulfide photocatalyst with superior photocatalytic performance. The catalyst exhibited remarkable stability and efficiency in the efficient photodegradation of organic pollutants.
Cadmium is one of the most toxic heavy metal contaminants in soils and water bodies and poses a serious threat to ecosystems and humans. However, cadmium is also an important resource widely used in many industries. The recovery of cadmium in the form of high-value products is considered as an ideal disposal strategy for Cd-contaminated environments. In this work, Pistia stratiotes was used to recycle cadmium from wastewaters through phytoaccumulation and then transformed into carbon-supported cadmium sulfide photocatalyst (CdS@C) through carbonization and hydrothermal reaction. The CdS@C photocatalyst contained a mixture of cubic and hexagonal CdS with lower band gap energy (2.14 eV) and high electron-hole separation efficiency, suggesting an excellent photoresponse ability and photocatalytic efficiency. The impressive stability and photocatalytic performance of CdS@C were demonstrated in efficient photodegradation of organic pollutants. center dot OH and O-2 center dot- were confirmed as the major active species for organic pollutants degradation during CdS@C photocatalysis. This work provides new insights into addressing Cd contaminated water bodies and upcycling in the form of photocatalyst.
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