Abstract：
Green synthesis of nanomaterials is advancing due to their ease of synthesis, cheapness, nontoxicity, and renewability. An environmentally friendly biogenic method has been developed for the green synthesis of nickel oxide nanoparticles (NiO NPs) using phytochemical-rich bioextract. They are rich in bioextract phenolics, flavonoids, and berberine. These phytochemicals successfully reduce and stabilize NiNO3 into NiO NPs. In this study, NiO NPs were synthesized by the green synthesis method from Lupinus Albus. Characterization of NiO NPs was carried out by TEM, XRD, SEM, UV, XRF, BET, and EDX analyses. According to XRD analysis, TEM results also support this, where the NiO NPs particle size diameter is 5 nm. It was determined by the Tauc equation that the band energy gap of NiO NPs is 1.69 eV. It was determined that the BET surface area of NiO NPs was 49.6 m2/g. NiO nanoparticles synthesized from Lupinus Albus extract by the green synthesis method were used as catalysts in the photocatalytic reduction of methylene blue with NaBH4. In the photocatalytic reduction of methylene blue with NaBH4, it was determined that there was no color change in 48 h without a catalyst, and in the presence of NiO nanoparticle catalyst, methylene blue was reduced by 97% in 8 min. The kinetics of the photocatalytic reduction of methylene blue with NaBH4 is a pseudo-first-order kinetic model and the kinetic rate constant is determined as 0.66 min-1, indicating that the catalytic effect of NiO NPs is very high at this value. NiO NPs were used five times in the photocatalytic reduction of methylene blue with NaBH4 and it was determined that the reduction of methylene blue was over 90% in each use.
NiO nanoparticles were synthesized from Lupinus Albus extract by green synthesis, which is an easily applied, cost-effective, and environmentally friendly method. The synthesized NiO nanoparticles were characterized using various characterization techniques. NiO nanoparticles have a high catalytic effect in the photocatalytic reduction of methylene blue with NaBH4. Photocatalytic reduction of methylene blue with uncatalyzed NaBH4 could not be achieved, and 97% reduction of methylene blue was completed in 8 min in the presence of NiO nanoparticle catalyst.
NiO nanoparticles were synthesized from Lupinus Albus extract by green synthesis, which is an easily applied, cost-effective, and environmentally friendly method. The synthesized NiO nanoparticles were characterized using various characterization techniques. NiO nanoparticles have a high catalytic effect in the photocatalytic reduction of methylene blue with NaBH4. Photocatalytic reduction of methylene blue with uncatalyzed NaBH4 could not be achieved, and 97% reduction of methylene blue was completed in 8 min in the presence of NiO nanoparticle catalyst.
摘要：
纳米材料的绿色合成由于其易于合成而不断发展，廉价，无毒，和可再生性。已开发出一种环境友好的生物方法，用于使用富含植物化学物质的生物提取物绿色合成氧化镍纳米颗粒（NiONPs）。它们富含生物提取物酚类物质，黄酮类化合物，还有小檗碱.这些植物化学物质成功地将NiNO3还原并稳定为NiONP。在这项研究中,通过绿色合成方法从羽扇豆合成NiONPs。NiONP的表征通过TEM进行，XRD,SEM,UV,XRF,BET,和EDX分析。根据XRD分析,TEM结果也支持这一点，其中NiONP的粒径为5nm。通过Tauc方程确定NiONP的带隙为1.69eV。测定NiONP的BET表面积为49.6m2/g。以羽扇豆提取物为原料,采用绿色合成法合成NiO纳米粒子作为催化剂,用NaBH4光催化还原亚甲基蓝。在用NaBH4光催化还原亚甲基蓝中，确定在没有催化剂的情况下48小时内没有颜色变化，在NiO纳米粒子催化剂的存在下，亚甲蓝在8分钟内减少了97%。用NaBH4光催化还原亚甲基蓝的动力学是伪一级动力学模型，动力学速率常数确定为0.66min-1，表明在该值下NiONP的催化效果非常高。NiONP在NaBH4光催化还原亚甲基蓝的过程中使用了五次，确定每次使用亚甲基蓝的还原均超过90％。
由羽扇豆提取物通过绿色合成合成NiO纳米颗粒，这是一个很容易应用的，成本效益高,和环保方法。使用各种表征技术表征合成的NiO纳米颗粒。NiO纳米粒子在NaBH4光催化还原亚甲基蓝方面具有较高的催化效果。未催化的NaBH4不能实现亚甲基蓝的光催化还原,在NiO纳米颗粒催化剂的存在下,在8分钟内完成亚甲基蓝的97%还原。
由羽扇豆提取物通过绿色合成合成NiO纳米颗粒，这是一个很容易应用的，成本效益高,和环保方法。使用各种表征技术表征合成的NiO纳米颗粒。NiO纳米粒子在NaBH4光催化还原亚甲基蓝方面具有较高的催化效果。未催化的NaBH4不能实现亚甲基蓝的光催化还原,在NiO纳米颗粒催化剂的存在下,在8分钟内完成亚甲基蓝的97%还原。
