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浪淘沙ysxysb木蟲(chóng) (正式寫(xiě)手)
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[求助]
求大神幫忙翻譯啊,感激不盡
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However, the morphology and monodispersity of the as-prepared hollow products are usually poor due to the deformability of the soft templates. Controlling monodispersity and spherical morphology of the inorganic hollow structures is the most challenging part of this technique. In this section, two main types of soft templates will be introduced: a surfactant and a polymer. Chen and co-workers110 prepared Co3O4 hollow nanospheres via the solvothermal decomposition of cobalt nitrate in the presence of sodium dodecylbenzenesulfonate (SDBS). Fig. 4 shows the obvious contrast difference between the structure centre and its edge, indicating the hollow nature of these particles. Fig. 4 (a) TEM image of 200 nm hollow nanospheres, (b) TEM image of 200 nm hollow nanospheres after heat treatment. Reproduced from ref. 110 with permission. Scheme 3 shows the possible formation processes of these multi-shelled hollow spheres. Scheme 3 Schematic illustration of fabrication of differently structured cobalt precursors in the presence of PVP templates: (1) single-shelled, (2)double-shelled, (3) triple-shelled. Reproduced from ref. 203 with permission. |

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然而,由于軟模板會(huì)變形,制備的中空制品形態(tài)和單分散性差。該技術(shù)最具挑戰(zhàn)性的部分是 控制單分散性和無(wú)機(jī)中空結(jié)構(gòu)的球形形態(tài)。在本節(jié)中,將介紹兩種主要類型的軟模板:表面活性劑軟模板和聚合物軟模板。 陳和他的同事110 在十二烷基苯磺酸鈉(SDBS)存在的條件下通過(guò)硝酸鈷溶劑熱分解制備四氧化三鈷納米空心球。圖4示出的結(jié)構(gòu)中心和結(jié)構(gòu)邊緣的明顯對(duì)比差異,表明這些顆粒的中空性質(zhì)。圖4(a)200 nm納米空心球透射電子顯微鏡圖像,(b)熱處理后200 nm納米空心球透射電子顯微鏡的圖像。由文獻(xiàn)110轉(zhuǎn)載并得到授權(quán)。 方案3顯示了這些多殼的空心球的可能形成過(guò)程。 方案3示意圖顯示了在PVP的模板存在下不同結(jié)構(gòu)的鈷前體形成過(guò)程:(1)單殼,(2)雙殼,(3)三重殼。由文獻(xiàn)203轉(zhuǎn)載并經(jīng)授權(quán)。 |

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