Dopamine functionalized tannic-acid-templated mesoporous silica nanoparticles as a new sorbent for the efficient removal of Cu2+from aqueous solution.
A simple, environmentally friendly and cost-effective nonsurfactant template method was used to synthesize tannic-acid-templated mesoporous silica nanoparticles (TMSNs), and then dopamine functionalized TMSNs (Dop-TMSNs) which was synthesized by a facile and biomimetic coating strategy, was developed as a new sorbent for the removal of Cu2+from aqueous solution. The Dop-TMSNs were thoroughly characterized by SEM, TEM, BET, FT-IR and TGA, and the effects of contact time, initial pH, K+and Na+concentrations, co-existing polyvalent metal ions and adsorption-desorption cycle times on the sorption capacity of Dop-TMSNs were studied. It was demonstrated that the maximum adsorption capacity of Cu2+by Dop-TMSNs was 58.7 mg/g at pH 5.5, and the sorption reached equilibrium within 180 min. Moreover, the K+and Na+concentrations had a very slight influence on the sorption process and the adsorption capacity of the Dop-TMSNs still remained 89.2% after recycling for four times. All the results indicated that the Dop-TMSNs could be utilized as an excellent sorbent for the sequestration of Cu2+.
School of Port and Transportation Engineering, Zhejiang Ocean University, Zhoushan 316022, China.
Junkai
J
Gao
School of Port and Transportation Engineering, Zhejiang Ocean University, Zhoushan 316022, China.
Hao
H
Lei
School of Port and Transportation Engineering, Zhejiang Ocean University, Zhoushan 316022, China.
Zhi
Z
Han
School of Port and Transportation Engineering, Zhejiang Ocean University, Zhoushan 316022, China.
Qian
Q
Shi
School of Port and Transportation Engineering, Zhejiang Ocean University, Zhoushan 316022, China.
Yan
Y
Chen
School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin, 300130, China.
Yanjun
Y
Jiang
D000327:Adsorption; D003300:Copper / Q000737:chemistry*; D004298:Dopamine / Q000737:chemistry*; D053758:Nanoparticles / Q000737:chemistry*; D016062:Porosity; D012822:Silicon Dioxide / Q000737:chemistry*; D013634:Tannins / Q000737:chemistry; D018508:Water Purification / Q000379:methods*
D013634:Tannins; D012822:Silicon Dioxide; D003300:Copper; D004298:Dopamine