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Graphene from sugar and its application in water purification
Soujit Sen Gupta1, Theruvakkattil Sreenivasan Sreeprasad, Shihabudheen Mundampra Maliyekkal
1DST Unit on Nanoscience, Department of Chemistry, Indian Institute of Technology Madras, Chennai 600 036, India.
ACS Applied Materials & Interfaces
|July 14, 2012
Summary
Researchers developed a green method to create a graphene sand composite (GSC) from cane sugar for water purification. This novel material effectively removes dyes and pesticides, outperforming activated carbon.
Area of Science:
- Materials Science
- Environmental Science
- Green Chemistry
Background:
- Graphene synthesis often involves complex and costly methods.
- Developing sustainable adsorbents for water purification is crucial.
- Cane sugar offers an abundant and renewable carbon source.
Purpose of the Study:
- To develop a green and cost-effective method for synthesizing graphenic material.
- To create a binder-free graphene sand composite (GSC) for water treatment.
- To evaluate the adsorption performance of GSC for common water contaminants.
Main Methods:
- Green synthesis of graphenic material from cane sugar.
- Immobilization of graphenic material onto sand without binders.
- Characterization using Raman spectroscopy.
- Adsorption experiments using rhodamine 6G (R6G) and chlorpyrifos (CP).
Main Results:
- Successful synthesis of graphenic material confirmed by Raman spectroscopy (G and D bands).
- Graphene sand composite (GSC) demonstrated effective removal of R6G and CP from water.
- High adsorption capacities: 55 mg/g for R6G and 48 mg/g for CP, exceeding activated carbon.
- Physical adsorption identified as the dominant removal mechanism.
Conclusions:
- The developed green synthesis and immobilization method is efficient and cost-effective.
- Graphene sand composite (GSC) shows significant potential as a water purification adsorbent.
- The technique is suitable for scaling up into commercial water filters.
