Towards sustainable mass production of metallic nanoparticles: Selective synthesis of copper nanoparticles directly from malachite ore
Towards sustainable mass production of metallic nanoparticles: Selective synthesis of copper nanoparticles directly from malachite ore
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DOI：
10.1016/j.mineng.2023.108048
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发表时间：
2023-05
影响因子：
4.8
通讯作者：
R. Crane;D. Sapsford
中科院分区：
文献类型：
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作者：
R. Crane;D. Sapsford
持续的工业发展和解决全球挑战的压力，包括气候变化和非药物病原体管理，将推动本世纪全球纳米颗粒生产的紧急升级。传统的纳米颗粒合成通常是一种线性多阶段方法，包括采矿、选矿、精炼、试剂合成，然后是纳米产品合成，这是能源和资源密集型的。在这里，我们提出了一种新的方法，使用纳米级Cu（nCu）作为一个例子的易位纳米粒子合成到地下一步。孔雀石矿石首先用H2SO 4或CH 3COOH（0.5M，1：10固液比）浸出，分别用0.01- 0.5M NaOH或NaCO 3部分中和，然后暴露于纳米零价铁（nZVI）（4.0g/L）。nZVI既可作为选择性和快速（<240 s）化学还原剂，也可作为磁响应nCu回收载体。观察到高达31.1wt%的Cu从矿石转化为离散的Cu 0/Cu 2 O纳米颗粒，使用HRTEM检测到高达81.70wt%的Cu（或98.59wt%的Cu和O）的纳米颗粒纯度。因此，这项工作提供了一个新的直接和一锅“原位”纳米粒子大规模生产路线的第一个概念验证。这条路线在概念上对广泛的工程纳米材料是可行的，包括那些含有Ni，Cr，U，Pb，Ag和Au的材料，因此有可能在采矿和原材料合成行业产生变革性的环境和经济效益。
Continuing industrial development and burgeoning pressure to solve global challenges, including climate change and non-pharmaceutical pathogen management, will drive an urgent up-scaling in global nanoparticle production this Century. Conventional nanoparticle synthesis is typically a linear multistage approach comprising mining, beneficiation, refining, reagent synthesis and then nanoproduct synthesis, which is both energy and resource intensive. Herein, we present a new approach using nanoscale Cu (nCu) as an example of the translocation of nanoparticle synthesis into the subsurface in one step. Malachite ore was first leached with H2SO4or CH3COOH (0.5 M, 1:10 solid–liquid ratio), partially neutralised using 0.01–0.5 M NaOH or NaCO3respectively and then exposed to nanoscale zerovalent iron (nZVI) (4.0 g/L). The nZVI acted as both a selective and rapid (<240 s) chemical reducing agent but also a magneto-responsive nCu recovery vehicle. Up to 31.1 wt% conversion of Cu from ore to discrete Cu0/Cu2O nanoparticles was observed, with nanoparticle purities of up to 81.70 wt% Cu (or 98.59 wt% Cu and O) detected using HRTEM. This work therefore provides a first proof-of-concept of a new direct and one-pot “in situ” nanoparticle mass production route. This routeis conceptually feasible for a wide range of engineered nanomaterials, including those containing Ni, Cr, U, Pb, Ag and Au, and therefore has the potential to yield transformative environmental and economic benefit across mining and raw material synthesis industries.