Nitrophenol is common carcinogenic pollutant known for its adverse effects on human beings and aquatic life. During the last few decades, the chemical reduction of nitrophenol compounds has been widely reported as the advanced removal methodology for such hazardous dyes from aqueous reservoirs. Many researchers have utilized different nanocatalytic systems using sodium borohydride (NaBH₄) as the reducing agent for acquiring industrially useful reduction product of aminophenol by carrying out the chemical reduction of nitrophenols. Polymeric material supported monometallic nanoparticles are widely reported catalyst for the degradation of 2-nitrophenol (2-NP) and 4-nitrophenol (4-NP). This review critically discusses the pros and cons of numerous supporting mediums of nanocatalytic assemblies used for the immobilization of nanomaterials. Mechanism and kinetic analysis of the reduction reaction of 2-NP and 4-NP have also been explained in this study. In addition, recent literature has also been effectively summarized in the tabular form for developing a better understanding of the reader. Pictorial representation of key nanocatalytic assemblies and catalytic reduction mechanism has also been narrated in this study.

硝基苯酚是常见的致癌污染物，以其对人类和水生生物的不利影响而闻名。在过去的几十年中，硝基苯酚化合物的化学还原已被广泛报道为从含水储层中去除此类有害染料的先进方法。许多研究人员利用硼氢化钠（NaBH ₄）作为还原剂，通过对硝基酚进行化学还原获得工业上有用的氨基酚还原产物。聚合物材料负载的单金属纳米颗粒是2-硝基苯酚（2-NP）和4-硝基苯酚（4-NP）降解的催化剂。这篇评论批判性地讨论了用于固定纳米材料的多种纳米催化组件支持介质的利弊。这项研究还解释了2-NP和4-NP还原反应的机理和动力学分析。此外，最近的文献也以表格形式有效地总结出来，以使读者更好地理解。本研究还叙述了关键的纳米催化组件和催化还原机理的图示。