生物银铜纳米粒子在甘蔗渣芳基化生物炭上的固定化：方法和催化性能,Applied Organometallic Chemistry

当前位置： X-MOL 学术 › Appl. Organomet. Chem. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

生物银铜纳米粒子在甘蔗渣芳基化生物炭上的固定化：方法和催化性能
Applied Organometallic Chemistry ( IF 3.7 ) Pub Date : 2022-09-09 , DOI: 10.1002/aoc.6885
Youssef Snoussi ₁ , Mohamed El Garah _{2,

3} , Ahmed M. Khalil _{1,

4} , Souad Ammar ₁ , Mohamed M. Chehimi ₁

Affiliation

对生物炭生产及其化学转化为特种材料的需求不断增长。在此，我们提出了一种通用方法，通过植物化学工艺，在芳基磺化甘蔗渣浆衍生的生物炭上制备 Ag/Cu 纳米颗粒。通过四步策略制造了二元纳米复合材料。_{首先通过生物质在 N 2} :H ₂ 95%:5% 惰性气氛下在 500°C 下缓慢热解来制备原始底物生物炭。此后，对生物炭表面进行原位芳基化以获得SO ₃ H-生物炭。_{SO 3}上的银和铜离子负载H-Biochar 已通过使用水醇介质的湿浸渍来实现。最后，利用从甘蔗渣中提取的天然提取物，确保吸附的金属离子减少，得到 SO ₃ H-Biochar@Ag/Cu。有趣的是，SO ₃ H-Biochar@Ag/Cu 的结构分析和对 D 到 G 带强度和面积比演变的研究表明，金属相沉积改变了 SO ₃ H-Biochar 的表面性质。与裸生物炭和中间基质（SO ₃ H-Biochar）相比，它最终提供了一种石墨化程度更高的纳米复合材料。这样的结果表明植物化学还原催化了底物石墨化。SO的催化性能₃ H-Biochar@Ag/Cu 在孔雀绿草酸盐的氧化降解中进行了研究。已经记录了染料的总矿化，并且发现实验数据最适合伪一级模型。拟合相对较好，矿化表观恒定速率等于 65 10 ^-3 min ^-1。值得一提的是，所有实验都使用了相对少量的复合催化剂（2.5 mg）。综上所述，该路线利用甘蔗渣的两相来生成强大的生物炭基催化剂，其固相衍生出具有特定性质的生物炭底物，其液体提取物用作天然还原制剂。

"点击查看英文标题和摘要"

Immobilization of biogenic silver–copper nanoparticles over arylated biochar from sugarcane bagasse: Method and catalytic performance

There is an ever-growing demand for biochar production and its chemical transformation into specialty materials. Herein, we suggest a versatile method to elaborate Ag/Cu nanoparticles, by phytochemical process, on aryl-sulfonated sugarcane bagasse pulp-derived biochar. A binary nanocomposite has been fabricated through a four-step strategy. The raw substrate biochar was first prepared by a slow pyrolysis of the biomass at 500°C under N₂:H₂ 95%:5% inert atmosphere. Thereafter, in situ arylation of the biochar surface has been performed to obtain SO₃H-Biochar. The loading of silver and copper ions on SO₃H-Biochar has been achieved via a wet impregnation using a hydroalcoholic medium. Finally, the natural extract obtained from sugarcane bagasse has been employed to ensure the reduction of the adsorbed metal ions and obtain SO₃H-Biochar@Ag/Cu. Interestingly, the structural analysis of SO₃H-Biochar@Ag/Cu and the study of the evolution of D to G band intensity and area ratios have revealed that the metal phase deposition has altered the SO₃H-Biochar surface properties. It finally provided a more graphitized nanocomposite compared with the bare biochar and the intermediate substrate (SO₃H-Biochar). Such a result suggests that the phytochemical reduction has catalyzed the substrate graphitization. The catalytic performance of SO₃H-Biochar@Ag/Cu has been investigated in the oxidative degradation of malachite green oxalate. A total mineralization of the dye has been registered, and the experimental data were found to give a best fitting to the pseudo-first-order model. The fitting was relatively good with a mineralization apparent constant rate equals to 65 10⁻³ min⁻¹. It is worth mentioning that all experiments used a relatively low amount of the composite catalyst (2.5 mg). So to recap, this route takes advantage of the two phases of sugarcane bagasse to generate a robust biochar-based catalyst, its solid phase to derive biochar substrate with particular properties, and its liquid extract to be used as natural reducing preparation.

更新日期：2022-09-09

点击分享查看原文

点击收藏

阅读更多本刊新发论文本刊介绍/投稿指南