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Integrated Ferroelectrics
An International Journal
Volume 162, 2015 - Issue 1: Proceedings of The Thirteenth China International Nanoscience and Technology Symposium (CINSTS14) Part III of V
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Original Articles

Alkali-Activated Steel Slag-Based Mesoporous Material as a New Photocatalyst for Degradation of Dye from Wastewater

Le KangCollege of Materials and Mineral Resources, Xi’an University of Architecture and Technology, Xi’an, 710055, PR China
,
Yao Jun zhangCollege of Materials and Mineral Resources, Xi’an University of Architecture and Technology, Xi’an, 710055, PR ChinaCorrespondence[email protected] [email protected]
,
Lei Lei wangCollege of Materials and Mineral Resources, Xi’an University of Architecture and Technology, Xi’an, 710055, PR China
,
Li ZhangCollege of Materials and Mineral Resources, Xi’an University of Architecture and Technology, Xi’an, 710055, PR China
,
Ke ZhangCollege of Materials and Mineral Resources, Xi’an University of Architecture and Technology, Xi’an, 710055, PR China
&
Li Cai liuCollege of Materials and Mineral Resources, Xi’an University of Architecture and Technology, Xi’an, 710055, PR China
Pages 8-17 | Received 05 Aug 2014, Accepted 31 Dec 2014, Published online: 17 Aug 2015
 
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Abstract

A new photocatalyst for degradation of dye from waste-water using alkali-activated steel slag-based mesoporous material (ASSMM) by adding pore-forming agent was firstly prepared. The XRD results showed that there were mainly mineral phase of calcium silicate hydrate (CSH) and lawsonite, (CaAl2Si2O7(OH)2·H2O) in the ASSMM samples by adding of pore-forming agent. The result of BET specific surface area indicated that more than 85% of pore volume principally centralized on mesoporous range with the pore size diameter of 2-50nm for the sample (0.1ASSMM) by adding of 0.1 wt% pore-forming agent. The degradation rate of malachite green (MG) dye is in the order of 0.1ASSMM > 5ASSMM > 1ASSMM > ASSMM > dye of direct photolysis. The 0.1ASSMM photocatalyst exhibited the highest degradation rate under UV irradiation, and the highest degradation rate can reach 95.53%. The photodegradation belongs to the first-order reaction kinetics.

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