(3-氨基丙基) 三乙氧基硅烷 (APTES) 功能化磁性纳米二氧化硅氧化石墨烯 (MGO) 纳米复合材料用于比较吸附水溶液中的重金属 [Pb(II)、Cd(II) 和 Ni(II)] 离子,Journal of Inorganic and Organometallic Polymers and Materials

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(3-氨基丙基) 三乙氧基硅烷 (APTES) 功能化磁性纳米二氧化硅氧化石墨烯 (MGO) 纳米复合材料用于比较吸附水溶液中的重金属 [Pb(II)、Cd(II) 和 Ni(II)] 离子
Journal of Inorganic and Organometallic Polymers and Materials ( IF 3.9 ) Pub Date : 2022-03-19 , DOI: 10.1007/s10904-022-02287-z
Cabangani Donga ₁ , Llyod N. Ndlovu ₁ , Alex T. Kuvarega ₁ , Shivani B. Mishra _{2,

3} , Ajay K. Mishra _{2,

4,

5,

6} , Alaa S. Abd-El-Aziz ₄

Affiliation

合成了(3-氨基丙基)三乙氧基硅烷(APTES)改性的磁性氧化石墨烯，并将其应用于吸附水溶液中的三种重金属Pb(II)、Cd(II)和Ni(II)。采用(3-氨基丙基)三乙氧基硅烷(APTES)作为磁性纳米二氧化硅上的功能化剂与GO偶联形成Fe ₃ O ₄ @SiO ₂ -NH _{2制备磁性GO。}/GO 纳米复合材料。FT-IR、XRD、BET、UV、VSM、SAXS、SEM 和 TEM 用于表征合成的纳米吸附剂。进行批量吸附研究以研究溶液 pH 值、初始金属离子浓度、吸附剂用量和接触时间的影响。发现 Pb(II)、Cd(II) 的最大平衡时间为 30 分钟，Ni(II) 为 60 分钟。动力学研究表明，Pb(II)、Cd(II)和Ni(II)在Fe ₃ O ₄ @SiO ₂ -NH ₂ /GO上的吸附遵循准二级动力学。所有吸附平衡数据均符合 Langmuir 等温线模型，对 Pb(II)、Cd(II) 和 Ni(II) 的最大单层吸附容量分别为 13.46、18.58 和 13.52 mg/g。Fe ₃ O₄ @SiO ₂ –NH ₂ /GO 吸附剂重复使用至少 7 次循环，没有矿芯浸出，显示了 Fe ₃ O ₄ @SiO ₂ –NH ₂ /GO 吸附剂在水/废水处理中的稳定性和潜在应用.

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(3-Aminopropyl) Triethoxysilane (APTES) Functionalized Magnetic Nanosilica Graphene Oxide (MGO) Nanocomposite for the Comparative Adsorption of the Heavy Metal [Pb(II), Cd(II) and Ni(II)] Ions from Aqueous Solution

(3-Aminopropyl) triethoxysilane (APTES) modified magnetic graphene oxide was synthesized and applied in the adsorption of three heavy metals, Pb(II), Cd(II) and Ni(II) from aqueous solution. An approach to prepare magnetic GO was adopted by using (3-aminopropyl) triethoxysilane (APTES) as a functionalizing agent on magnetic nanosilica coupled with GO to form the Fe₃O₄@SiO₂–NH₂/GO nanocomposite. FT-IR, XRD, BET, UV, VSM, SAXS, SEM and TEM were used to characterize the synthesized nanoadsorbents. Batch adsorption studies were conducted to investigate the effect of solution pH, initial metal ion concentration, adsorbent dosage and contact time. The maximum equilibrium time was found to be 30 min for Pb(II), Cd(II) and 60 min for Ni(II). The kinetics studies showed that the adsorption of Pb(II), Cd(II) and Ni(II) onto Fe₃O₄@SiO₂–NH₂/GO followed the pseudo-second-order kinetics. All the adsorption equilibrium data were well fitted to Langmuir isotherm model and maximum monolayer adsorption capacity for Pb(II), Cd(II) and Ni(II) were 13.46, 18.58 and 13.52 mg/g, respectively. The Fe₃O₄@SiO₂–NH₂/GO adsorbents were reused for at least 7 cycles without the leaching of mineral core, showing the enhanced stability and potential application of Fe₃O₄@SiO₂–NH₂/GO adsorbents in water/wastewater treatment.

更新日期：2022-03-19

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