Abstract

In this study, spent bleaching earth (SBE), a hazardous industrial waste was used as raw material to synthesis carbon/silicate nanohybrid material (CSNH) as support for mono and bimetallic palladium and nickel nanoparticles. The synthesized catalysts were characterized by different techniques such as nitrogen physisorption, FTIR, XRD, FESEM, and TEM and evaluated in the reduction of nitrobenzene (NB) to aniline (AN) in a batch process at ambient conditions. The Pd/CSNH shows the highest conversion. Response surface methodology (RSM) was used for investigation of the effect of different variables. The results showed that the mole ratio of sodium borohydride to nitrobenzene has the most important impact on the conversion of nitrobenzene to aniline. In the optimal reaction conditions (20 mg Pd/CSNH and mole ratio of NaBH₄/NB = 4 in 25 min), conversion, selectivity to aniline and yield of 100% were obtained at room temperature.

抽象的

在这项研究中，使用了有害工业废废土（SBE）作为合成碳/硅酸盐纳米杂化材料（CSNH）的原料，以作为单金属和双金属钯和镍纳米粒子的载体。合成的催化剂通过不同的技术（如氮物理吸附，FTIR，XRD，FESEM和TEM）进行表征，并在环境条件下以间歇方式将硝基苯（NB）还原为苯胺（AN）进行了评估。Pd / CSNH显示最高的转换率。响应面方法（RSM）用于调查不同变量的影响。结果表明，硼氢化钠与硝基苯的摩尔比对硝基苯向苯胺的转化影响最大。在最佳反应条件下（20 mg Pd / CSNH和NaBH _4的摩尔比在25分钟内/ NB = 4），在室温下获得转化率，对苯胺的选择性和100％的收率。