Anion-Regulated Synthesis of ZnO 1D Necklace-Like Nanostructures with High Photocatalytic Activity.
Anion-Regulated Synthesis of ZnO 1D Necklace-Like Nanostructures with High Photocatalytic Activity.
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阴离子调控合成具有高光催化活性的 ZnO 一维项链状纳米结构
DOI：
10.1186/s11671-020-03435-5
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发表时间：
2020-11-04
影响因子：
--
通讯作者：
Luo D
中科院分区：
文献类型：
--
作者：
Qin X;Shi D;Guo B;Fu C;Zhang J;Xie Q;Shi X;Chen F;Qin X;Yu W;Feng X;Liu Y;Luo D
具有特定结构的一维纳米材料因其在催化、传感和能量转换等方面的应用而受到越来越多的科学和技术关注。然而，开发一种可操作且简单的方法来制造一维纳米结构仍然是一个挑战。在这项工作中，我们开发了一种“阴离子调节形态”策略，其中阴离子可以通过调节不同生长面的表面能来调节ZnO纳米材料的尺寸限制的各向异性生长。将醋酸锌和尿素混合物进行水热处理，并在400℃下进行煅烧，可以制备出ZnO一维项链状纳米结构（NNS）。而硝酸根离子、硫酸盐离子和氯离子分别取代醋酸离子生成ZnO纳米花、纳米片和六角形纳米板。用密度泛函理论计算解释了阴离子调控各向异性晶体生长的机理。指定的ZnO 1D NNS具有更好的电子传递能力，同时晶粒表面可以提供更大的比表面积，从而在甲基橙（MO）的后续光降解中提供了先进的光催化能力。在四种不同形貌的光催化剂中，催化活性最高的ZnO 1D NNS在光催化反应中对MO的降解率为57.29%，分别是纳米花、纳米片和六方纳米板的2倍、10倍和17倍。本研究为ZnO一维纳米材料的构建和应用提供了新的思路。
One-dimensional (1D) nanomaterials with specific architectures have received increasing attention for both scientific and technological interests for their applications in catalysis, sensing, and energy conversion, etc. However, the development of an operable and simple method for the fabrication of 1D nanostructures remains a challenge. In this work, we developed an “anion-regulated morphology” strategy, in which anions could regulate the dimensionally-restricted anisotropic growth of ZnO nanomaterials by adjusting the surface energy of different growth facets. ZnO 1D necklace-like nanostructures (NNS) could be prepared through a hydrothermal treatment of zinc acetate and urea mixture together with a subsequent calcination procedure at 400 °C. While replacing the acetate ions to nitrate, sulfate, and chlorion ions produced ZnO nanoflowers, nanosheets and hexagonal nanoplates, respectively. Density functional theory calculations were carried out to explain the mechanism behind the anions-regulating anisotropic crystal growth. The specified ZnO 1D NNS offered improved electron transport while the grain surface could supply enlarged specific surface area, thus providing advanced photocatalytic ability in the following photodegradation of methyl orange (MO). Among the four photocatalysts with different morphologies, ZnO 1D NNS, possessing the highest catalytic activity, degraded 57.29% MO in the photocatalytic reaction, which was 2 times, 10 times and 17 times higher than nanoflowers, nanosheets and hexagonal nanoplates, respectively. Our work provides new ideas for the construction and application of ZnO 1D nanomaterials.
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影响因子：
3.9
作者：
Alam, Umair;Khan, Azam;Ali, Danish;Bahnermann, Detlef;Muneer, M.
通讯作者：
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影响因子：
3.9
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作者：
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通讯作者：
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