Amine-Functionalized and Hydroxyl-Functionalized Magnesium Ferrite Nanoparticles for Congo Red Adsorption

被引：144

作者：

Aoopngan, Chattharika ^{[1
,2
,3
]}

Nonkumwong, Jeeranan ^{[1
,2
]}

Phumying, Santi ^{[4
]}

Promjantuek, Wilasinee ^{[5
]}

Maensiri, Santi ^{[4
]}

Noisa, Parinya ^{[5
]}

Pinitsoontorn, Supree ^{[6
]}

Ananta, Supon ^{[7
]}

Srisombat, Laongnuan ^{[1
,2
,8
]}

机构：

[1] Chiang Mai Univ, Fac Sci, Dept Chem, Chiang Mai 50200, Thailand

[2] Chiang Mai Univ, Fac Sci, Ctr Excellence Innovat Chem, Chiang Mai 50200, Thailand

[3] Chiang Mai Univ, Grad Sch, Chiang Mai 50200, Thailand

[4] Suranaree Univ Technol, Inst Sci, Sch Phys, Adv Mat Phys Lab Amp, Nakhon Ratchasima 30000, Thailand

[5] Suranaree Univ Technol, Inst Agr Technol, Sch Biotechnol, Lab Cell Based Assays & Innovat, 111 Univ Ave, Nakhon Ratchasima 30000, Thailand

[6] Khon Kaen Univ, Inst Nanomat Res & Innovat Energy IN RIE, Khon Kaen 40002, Thailand

[7] Chiang Mai Univ, Dept Phys & Mat Sci, Fac Sci, Chiang Mai 50200, Thailand

[8] Chiang Mai Univ, Ctr Excellence Mat Sci & Technol, Chiang Mai 50200, Thailand

来源：

ACS APPLIED NANO MATERIALS | 2019年 / 2卷 / 08期

关键词：

Congo red; MgFe2O4; nanoparticles; adsorption; magnetic nanoadsorbents; amine-functionalized nanoparticles; hydroxyl-functionalized nanoparticles; IRON-OXIDE NANOPARTICLES; AQUEOUS-SOLUTION; WASTE-WATER; MAGNETITE NANOPARTICLES; SUPERIOR ADSORPTION; SOLUTION COMBUSTION; MESOPOROUS SILICA; FACILE SYNTHESIS; AZO-DYES; REMOVAL;

D O I：

10.1021/acsanm.9b01305

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

In this paper, the potential use of either aminefunctionalized or hydroxyl-functionalized magnesium ferrite (MgFe2O4) nanoparticles (NPs) as Congo red nanoadsorbents is explored and compared. The amine-functionalized MgFe2O4 NPs (denoted as MgFe2O4-NH2 NPs) were synthesized by a one-pot coprecipitation method using ethanolamine as a surface modifier, while the hydroxyl-functionalized MgFe2O4 NPs (denoted as MgFe2O4-OH NPs) were prepared by a hydrothermal method. In general, both nanoadsorbents can be successfully produced without calcination and were found to possess superparamagnetic properties with high saturation magnetization (M-s). In particular, MgFe2O4-OH NPs exhibit a higher M-s value of similar to 53 emu g(-1), promoting the rapid separation ability of the NPs from the treated solution using an external permanent magnet. The Congo red removal performance of these nanoadsorbents was investigated as a function of the pH of the aqueous solution and contact time. The removal efficiency of Congo red by MgFe2O4-NH2 NPs was found to be similar to 96% within 180 min at pH 6, while MgFe2O4-OH NPs provided a removal efficiency at, similar to 88% within 420 min at pH 8. In addition, the maximum adsorption capacities (q(m)) calculated using the Langmuir isotherm equation were found to be 71.4 and 67.6 mg g(-1) for MgFe2O4-NH2 and MgFe2O4-OH NPs, respectively. The higher q(m) value of MgFe2O4-NH2 NPs could be attributed to stronger electrostatic interactions with the sulfonate groups of Congo red formed by larger numbers of protonated amine groups than protonated hydroxyl groups of the adsorbents under the performed conditions. Moreover, reusability experiments also revealed that MgFe2O4-NH2 NPs offered a higher removal efficiency than MgFe2O4-OH NPs for the same cycles tested. Therefore, this study demonstrates that MgFe2O4-NH2 NPs synthesized by a simple one-pot synthetic method are applicable as reusable magnetic nanoadsorbents for Congo red removal in current practice.

引用

页码：5329 / 5341

页数：25

共 71 条

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