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Titanium dioxide photocatalyst enabled composite for dye removal from water.
Rabia Shaheen1, Muhammad Asif Hanif2
1Nano and Biomaterials Lab (NBL), Department of Chemistry, University of Agriculture, Faisalabad, 38040, Pakistan.
Scientific Reports
|November 21, 2025
Summary
Industrial waste grey stone (GS) powder effectively removes acid yellow dye. Calcination produced nanorods, and a nanocomposite with copper-doped titanium dioxide further enhanced dye removal efficiency for cleaner water.
Area of Science:
- Environmental Science
- Materials Science
- Chemical Engineering
Background:
- Industrial effluents containing dyes cause significant water pollution.
- There is a need for cost-effective and sustainable methods for dye removal.
Purpose of the Study:
- To investigate the use of industrial waste grey stone (GS) powder for acid yellow dye removal.
- To optimize adsorption parameters and enhance the dye removal capacity of GS.
- To develop a nanocomposite for improved dye adsorption.
Main Methods:
- Grey stone (GS) powder was calcined to produce nanorods.
- Adsorption efficiency was optimized by varying pH, initial dye concentration, temperature, adsorbent dose, and contact time.
- A nanocomposite was prepared using calcined grey stone (CGS) and copper-doped titanium dioxide.
Main Results:
- Calcination of GS powder resulted in the formation of nanorods.
- The nanocomposite exhibited enhanced acid yellow dye removal capacity.
- Brunauer-Emmett-Teller (BET) analysis confirmed a higher external surface area for the nanocomposite.
- Scanning electron microscopy (SEM) revealed regular shaped small particles in the nanocomposite.
Conclusions:
- Low-cost, sustainable adsorbents derived from industrial waste can efficiently remove acid yellow dye.
- The developed nanocomposite shows significant potential for treating dye-contaminated industrial wastewater.
- This approach offers a viable solution to combat water pollution and protect environmental health.
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