School of Chemical Engineering and Technology, Tianjin University, Tianjin 300350, China.
School of Chemical Engineering and Technology, Tianjin University, Tianjin 300350, China.
J Colloid Interface Sci. 2018 May 15;518:34-40. doi: 10.1016/j.jcis.2018.01.109. Epub 2018 Feb 1.
A synthetic process was exploited to fabricate patchy CuO evenly planted on cubic NaTaO for photocatalytically reducing CO in isopropanol. The nano patches of CuO with about 15 nm in size were uniformly distributed on the surface of NaTaO via a phase-transfer protocol and solvothermal synthesis. The crystal phase, morphology, composition, optical absorption and charge separation of as-prepared CuO-NaTaO were characterized by XRD, SEM, TEM, EDX, XPS, UV-Vis and PL. The results of photocatalytic reduction of CO confirmed that the CuO patched NaTaO possessed better ability to separate charge carriers and selectively reduce CO to methanol than CuO directly loaded NaTaO using the traditional liquid phase reduction procedure after comparing the methanol yields. Furthermore, 5 wt% CuO patched NaTaO led to the highest methanol yield of 1302.22 μmol g h. A redox mechanism was proposed and illustrated in a schematic diagram.
利用一种合成工艺制备了在立方 NaTaO 上均匀种植的花状 CuO，用于光催化异丙醇中 CO 的还原。通过相转移法和溶剂热合成，纳米尺寸约为 15nm 的 CuO 纳米片均匀分布在 NaTaO 的表面。采用 XRD、SEM、TEM、EDX、XPS、UV-Vis 和 PL 对制备的 CuO-NaTaO 的晶体相、形貌、组成、光吸收和电荷分离进行了表征。通过比较甲醇产率，光催化还原 CO 的结果证实，与采用传统液相还原法直接负载在 NaTaO 上的 CuO 相比，CuO 修饰的 NaTaO 具有更好的分离载流子和选择性还原 CO 为甲醇的能力。此外，5wt%CuO 修饰的 NaTaO 导致甲醇产率最高，为 1302.22μmol•g-1•h-1。提出并在示意图中说明了一种氧化还原机制。
