α-Fe₂O₃ and Fe₃O₄ nanoplates and nanorices were synthesized by hydrothermal reaction and used for organic pollutant adsorption and removal studies. The effect of size and morphology of α-Fe₂O₃ and Fe₃O₄ nanoplates and nanorices on the dye adsorption efficiency were investigated systematically. The adsorption studies showed a good selectivity and high adsorption capacity (~93%) of the α-Fe₂O₃ nanoplates towards congo red (C.R.) dye, due to the formation of hydrogen bonding between amine group (─ NH₂) of C.R. and surface carboxylate group (─ COOH), and adsorbed ─ OH groups of α-Fe₂O₃ nanoplates. The α-Fe₂O₃ nanoplates also showed excellent recyclability with negligible loss of the adsorption capacity, owing to their stable morphology and crystal structure. The excellent C.R. adsorption capacity of the α-Fe₂O₃ nanoplates was further confirmed by conducting experiments with a solution containing a mixture of dyes. Our findings indicate that the synthesized α-Fe₂O₃ nanoplates have a great potential in removing industrial waste, such as C.R. from polluted water.

的α-Fe ₂ ö ₃和Fe _3个ö ₄纳米片和nanorices采用水热反应合成的，并用于有机污染物吸附除去的研究。系统研究了α -Fe ₂ O ₃和Fe ₃ O ₄纳米板的大小和形态以及纳米颗粒对染料吸附效率的影响。吸附研究表明，由于胺基（─NH _2）之间形成氢键，α -Fe ₂ O ₃纳米板对刚果红（CR）染料具有良好的选择性和高吸附能力（〜93％）。）和表面羧酸盐基团（─COOH））和吸附的α -Fe ₂ O ₃纳米板的─OH基团。由于其稳定的形态和晶体结构，α -Fe ₂ O ₃纳米板还显示出优异的可回收性，而吸附能力的损失可忽略不计。通过使用含有染料混合物的溶液进行实验，进一步证实了α -Fe ₂ O ₃纳米板的出色的CR吸附能力。我们的发现表明合成的α -Fe ₂ O ₃ 纳米板在去除工业废水（如污水中的CR）方面具有巨大潜力。