P-type octahedral Cu₂O particles with exposed {111} facets and superior CO sensing properties

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• 作者：Lili Wang^aAuthor Vitae ; Rui Zhang^aAuthor Vitae ; Tingting Zhou^aAuthor Vitae ; Zheng Lou^bAuthor Vitae ; Jianan Deng^aAuthor Vitae ; Tong Zhang^a ; ^{zhangtong@jlu.edu.cn" class="auth_mail" title="E-mail the corresponding author}Author Vitae
• 关键词：P-type semiconductor ; Cu2O ; Facet-dependent properties ; High response ; Gas sensors
• 刊名：Sensors & Actuators: B. Chemical
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：239
• 期：Complete
• 页码：211-217
• 全文大小：2473 K

文摘

P-type Cu₂O nanostructures with an interesting morphological evolution (from cube, truncated octahedral to octahedral) were realized simply by adjusting the amounts of PVP used. Octahedral Cu₂O particles exposing only the {111} facets exhibit a surprisingly competitive sensing activity to CO gases in relatively low working temperature due to high-energy surfaces, large percentage of surface copper atoms density and dangling bonds compared with cube Cu₂O with (100) facets and truncated octahedral Cu₂O with (100) and (111) facets. Our findings may provide an opportunity to explore a simple, efficient, cost-effective and promising sensing/catalysis activity materials in gas sensors, gas catalysis and photo-catalysis.