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Preparation of novel hybrid nanomaterials based on LaFeO3 and phosphotungstic acid as a highly efficient magnetic photocatalyst for the degradation of methylene blue dye solution
Applied Organometallic Chemistry ( IF 3.7 ) Pub Date : 2020-09-30 , DOI: 10.1002/aoc.6011 Farzaneh Mahmoudi 1 , Saeed Farhadi 1 , Marketa Jarosova 2 , Mika Sillanpää 3
Applied Organometallic Chemistry ( IF 3.7 ) Pub Date : 2020-09-30 , DOI: 10.1002/aoc.6011 Farzaneh Mahmoudi 1 , Saeed Farhadi 1 , Marketa Jarosova 2 , Mika Sillanpää 3
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Novel magnetic hybrid nanomaterials 1 (LaFeO3.Fe3O4@SiO2‐NH2/PW12) were synthesized by supporting phosphotungstic acid (H3PW12O40; PW12) on LaFeO3.Fe3O4 nanomaterials through sono‐assisted method. The synthesized nanomaterials were fully characterized by using FT‐IR, XRD, UV–vis, BET‐BJH, VSM, SEM, and TEM analyses. FT‐IR, XRD, and UV–vis confirmed successful synthesis of nanomaterials. The SEM and TEM images revealed spherical morphology with core‐shell structure for hybrid nanomaterials 1. VSM results confirmed the magnetic property of hybrid nanomaterials 1 and suggested it as easily recyclable photocatalyst for removal of organic dyes from aqueous solution. The photocatalytic activity of hybrid nanomaterials 1 has been studied over the degradation of methylene blue (MB) and methyl orange (MO) solution under UV–vis light irradiation. Importantly the hybrid nanomaterials 1 showed outstanding degradation efficiency for MB solution in comparison with bare LaFeO3.Fe3O4 and PW12. The photocatalytic activity was enhanced mainly due to the high efficiency in separation of electron–hole pairs induced by the remarkable synergistic effects of LaFeO3.Fe3O4 and PW12 semiconductors. After the photocatalytic reaction, the nanocomposite can be easily separated from the reaction solution and reused several times without loss of its photocatalytic activity. Trapping experiments indicated that hole (hVB+) and •OH radicals were the main reactive species for dye degradation in the present photocatalytic system. On the basis of the experimental results and estimated band gaps, the mechanism for the enhanced photocatalytic activity was proposed.
中文翻译：
基于LaFeO3和磷钨酸的新型杂化纳米材料的制备及其降解亚甲基蓝染料溶液的高效磁性光催化剂。
通过在LaFeO 3 .Fe 3 O 4上负载磷钨酸（H 3 PW 12 O 40； PW 12），合成了新型磁性杂化纳米材料1（LaFeO 3 .Fe 3 O 4 @SiO 2 -NH 2 / PW 12）。声波辅助方法制备纳米材料。合成的纳米材料通过FT-IR，XRD，UV-vis，BET-BJH，VSM，SEM和TEM分析得到了充分表征。FT-IR，XRD和UV-vis证实了纳米材料的成功合成。SEM和TEM图像显示了杂化纳米材料1的具有核壳结构的球形形态。VSM结果证实了杂化纳米材料1的磁性，并表明它是用于从水溶液中去除有机染料的易于回收的光催化剂。研究了杂化纳米材料1在紫外可见光下降解亚甲基蓝（MB）和甲基橙（MO）溶液的光催化活性。重要的是，杂化纳米材料1与裸LaFeO 3 .Fe 3 O 4和PW 12相比，MB溶液表现出优异的降解效率。LaFeO 3 .Fe 3 O 4和PW 12半导体的显着协同作用，导致电子-空穴对的高效分离，从而提高了光催化活性。在光催化反应之后，可以容易地将纳米复合材料与反应溶液分离并重复使用数次，而不会损失其光催化活性。诱捕实验表明，孔（h VB +）和•OH自由基是本光催化体系中染料降解的主要反应性物质。根据实验结果和估计的带隙，提出了增强光催化活性的机理。
更新日期：2020-11-06
中文翻译：
基于LaFeO3和磷钨酸的新型杂化纳米材料的制备及其降解亚甲基蓝染料溶液的高效磁性光催化剂。
通过在LaFeO 3 .Fe 3 O 4上负载磷钨酸（H 3 PW 12 O 40； PW 12），合成了新型磁性杂化纳米材料1（LaFeO 3 .Fe 3 O 4 @SiO 2 -NH 2 / PW 12）。声波辅助方法制备纳米材料。合成的纳米材料通过FT-IR，XRD，UV-vis，BET-BJH，VSM，SEM和TEM分析得到了充分表征。FT-IR，XRD和UV-vis证实了纳米材料的成功合成。SEM和TEM图像显示了杂化纳米材料1的具有核壳结构的球形形态。VSM结果证实了杂化纳米材料1的磁性，并表明它是用于从水溶液中去除有机染料的易于回收的光催化剂。研究了杂化纳米材料1在紫外可见光下降解亚甲基蓝（MB）和甲基橙（MO）溶液的光催化活性。重要的是，杂化纳米材料1与裸LaFeO 3 .Fe 3 O 4和PW 12相比，MB溶液表现出优异的降解效率。LaFeO 3 .Fe 3 O 4和PW 12半导体的显着协同作用，导致电子-空穴对的高效分离，从而提高了光催化活性。在光催化反应之后，可以容易地将纳米复合材料与反应溶液分离并重复使用数次，而不会损失其光催化活性。诱捕实验表明，孔（h VB +）和•OH自由基是本光催化体系中染料降解的主要反应性物质。根据实验结果和估计的带隙，提出了增强光催化活性的机理。
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