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Fabrication of Core–Shell Nanotube Array for Artificial Photosynthesis Featuring an Ultrathin Composite Separation Membrane
ACS Nano ( IF 15.8 ) Pub Date : 2018-01-09 00:00:00 , DOI: 10.1021/acsnano.7b07125 Eran Edri 1 , Shaul Aloni 1 , Heinz Frei 1
ACS Nano ( IF 15.8 ) Pub Date : 2018-01-09 00:00:00 , DOI: 10.1021/acsnano.7b07125 Eran Edri 1 , Shaul Aloni 1 , Heinz Frei 1
Affiliation
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Macroscale arrays of cobalt oxide–silica core–shell nanotubes with high aspect ratio and ultrathin walls of less than 20 nm have been fabricated. The silica shells feature embedded oligo-para(phenylenevinylene) molecules for charge transport across the insulating silica layer, which is tightly controlled by their electronic properties. The assembly is based on the use of a sacrificial Si nanorod array template combined with atomic layer deposition, covalent anchoring of organic wire molecules, and dry cryo-etching. High-resolution TEM imaging of samples prepared by microtome affords structural details of single core–shell nanotubes. The integrity of silica-embedded organic wire molecules exposed to atomic layer deposition, thermal treatment, and harsh etching procedures is demonstrated by grazing angle ATR FT-IR, FT-Raman, and XPS spectroscopy. The inorganic oxide-based core–shell nanotubes with ultrathin gas-impermeable, proton-conducting silica shells functionalized by molecular wires enable complete nanoscale photosynthetic units for CO2 reduction by H2O under membrane separation. Arrays of massive numbers of such core–shell nanotube units afford a design that extends the separation of the incompatible H2O oxidation and CO2 reduction catalysis environments across the continuum of length scales from nanometers to centimeters.
中文翻译：
具有超薄复合分离膜的用于光合作用的核壳纳米管阵列的制备
制备了具有高纵横比和小于20 nm的超薄壁的氧化钴-二氧化硅核-壳纳米管的宏观阵列。硅胶壳采用嵌入式寡核苷酸-对（亚苯基亚乙烯基）分子用于在绝缘二氧化硅层上进行电荷传输，这受其电子性能严格控制。该组装基于牺牲性Si纳米棒阵列模板的使用，该模板与原子层沉积，有机线分子的共价锚定和干式低温蚀刻相结合。切片机制备的样品的高分辨率TEM成像提供了单核-壳纳米管的结构细节。掠射角ATR FT-IR，FT-Raman和XPS光谱证明了暴露于原子层沉积，热处理和苛刻刻蚀步骤的嵌入二氧化硅的有机线分子的完整性。无机氧化物基核壳纳米管具有超薄的不透气性，在膜分离下通过H 2 O 2的还原。大量此类核-壳纳米管单元的阵列提供了一种设计，可将不相容的H 2 O氧化和CO 2还原催化环境的分离范围扩展到从纳米到厘米的整个长度范围。
更新日期：2018-01-09
中文翻译：
具有超薄复合分离膜的用于光合作用的核壳纳米管阵列的制备
制备了具有高纵横比和小于20 nm的超薄壁的氧化钴-二氧化硅核-壳纳米管的宏观阵列。硅胶壳采用嵌入式寡核苷酸-对（亚苯基亚乙烯基）分子用于在绝缘二氧化硅层上进行电荷传输，这受其电子性能严格控制。该组装基于牺牲性Si纳米棒阵列模板的使用，该模板与原子层沉积，有机线分子的共价锚定和干式低温蚀刻相结合。切片机制备的样品的高分辨率TEM成像提供了单核-壳纳米管的结构细节。掠射角ATR FT-IR，FT-Raman和XPS光谱证明了暴露于原子层沉积，热处理和苛刻刻蚀步骤的嵌入二氧化硅的有机线分子的完整性。无机氧化物基核壳纳米管具有超薄的不透气性，在膜分离下通过H 2 O 2的还原。大量此类核-壳纳米管单元的阵列提供了一种设计，可将不相容的H 2 O氧化和CO 2还原催化环境的分离范围扩展到从纳米到厘米的整个长度范围。
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