Mesoporous magnesium oxide–graphene oxide composite (MGC) has been synthesized using a facile post-immobilization method by mixing pre-synthesized magnesium oxide (MgO) with graphene oxide (GO). MgO used for fabrication of the composite has been synthesized using an environment-friendly method involving gelatin as a template. XRD, Raman and EDX analyses have confirmed the presence of MgO and GO in the composite. FTIR and SEM analyses of synthesized MGC have further elucidated the surface functionalities and morphology, respectively. Using N₂ adsorption–desorption isotherm, BET surface area of MGC has been calculated to be 55.9 m² g⁻¹ and BJH analysis confirmed the mesoporous nature of MGC. The application of synthesized MGC as a selective adsorbent for various toxic anionic dyes has been explored. Batch adsorption studies have been carried out to investigate the influence of different adsorption parameters on the adsorption of two anionic dyes: indigo carmine (IC) and orange G (OG). The maximum adsorption capacities exhibited by MGC for IC and OG are 252.4 and 24.5 mg g⁻¹, respectively. Plausible mechanism of dye adsorption has been explained in detail using FTIR analysis. In a mixture of cationic and anionic dyes, MGC selectively adsorbs anionic dyes with high separation factors, while in binary mixtures of anionic dyes, both dyes are adsorbed efficiently. Thus, MGC has been shown to be a potential adsorbent for the selective removal of anionic dyes from wastewater.

介孔氧化镁-氧化石墨烯复合材料（MGC）是通过将预合成的氧化镁（MgO）与氧化石墨烯（GO）混合使用的简便后固定方法合成的。使用包括明胶作为模板的环境友好方法合成了用于制造复合材料的MgO。XRD，拉曼和EDX分析已确认复合物中存在MgO和GO。合成MGC的FTIR和SEM分析分别进一步阐明了表面功能和形态。使用N ₂吸附-解吸等温线，MGC的BET表面积经计算为55.9 m ²  g ^-1BJH分析证实了MGC的介孔性质。已经探索了合成的MGC作为各种有毒阴离子染料的选择性吸附剂的应用。进行了批量吸附研究，以研究不同吸附参数对两种阴离子染料靛蓝胭脂红（IC）和橙色G（OG）吸附的影响。MGC对IC和OG表现出的最大吸附容量为252.4和24.5 mg g ^-1， 分别。使用FTIR分析已经详细说明了染料吸附的可能机理。在阳离子和阴离子染料的混合物中，MGC选择性吸附具有高分离因子的阴离子染料，而在阴离子染料的二元混合物中，两种染料均被有效地吸附。因此，已经显示出MGC是从废水中选择性除去阴离子染料的潜在吸附剂。