Abstract The decoration of zinc oxide (ZnO) nanorods on layered structure of low carbonate NiAl-layered double hydroxide (NiAl-LDH) was conducted by a combination of an aqueous solution of zinc chloride and an aqueous suspension of NiAl-LDH under hydrothermal method and subsequent calcination at 250 °C for 6 h. A series of the products, ZnO/NiAl-LDH(x), where x was a Zn2+ content, were characterized by X-ray diffraction, transmission electron microscopy, surface analysis, as well as UV–visible and photoluminescence spectroscopies. The slight shift of the reflection at around 11° as well as the appearance of two peaks at around 23° and 47° in the X-ray diffraction patterns, and the decrease of the vibration mode of CO32‐− (at 1359 cm−1) in Fourier transform infrared spectra confirmed the deintercalation of CO32− on/in layered double hydroxide. The presence of the reflections due to zinc oxide at around 32°, 33° and 36° and transmission electron microscope images demonstrated the images of zinc oxide nanorods distributed on the external surface of the hexagonal plates of the layered double hydroxide, verified the formation of zinc oxide crystal in the products. The band gap energy value of the products was highly dependent on the amount of zinc oxide in the products that played an important role in the photodegradation enhancement of methyl orange in aqueous solution and the catalytic reusing performance.

中文翻译：

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低碳酸盐NiAl层状双氢氧化物修饰的ZnO作为降解甲基橙的高效光催化剂

摘要 采用氯化锌水溶液和 NiAl-LDH 水悬浮液的水热法，将氧化锌 (ZnO) 纳米棒修饰在低碳酸盐 NiAl-层状双氢氧化物 (NiAl-LDH) 的层状结构上。随后在 250°C 下煅烧 6 小时。一系列产品 ZnO/NiAl-LDH(x)，其中 x 是 Zn2+ 含量，通过 X 射线衍射、透射电子显微镜、表面分析以及紫外-可见光和光致发光光谱进行表征。X 射线衍射图中 11° 左右的反射略有偏移，并在 23° 和 47° 附近出现两个峰，CO32--（在 1359 cm-1 ) 在傅里叶变换红外光谱中证实了 CO32− 在层状双氢氧化物上/内的脱嵌。氧化锌在 32°、33°和 36° 左右的反射和透射电子显微镜图像的存在证明了氧化锌纳米棒分布在层状双氢氧化物的六边形板的外表面上的图像，验证了形成产品中的氧化锌晶体。产物的带隙能值高度依赖于产物中氧化锌的含量，氧化锌对水溶液中甲基橙的光降解增强和催化再利用性能起重要作用。验证了产品中氧化锌晶体的形成。产物的带隙能值高度依赖于产物中氧化锌的含量，氧化锌对水溶液中甲基橙的光降解增强和催化再利用性能起重要作用。验证了产品中氧化锌晶体的形成。产物的带隙能值高度依赖于产物中氧化锌的含量，氧化锌对水溶液中甲基橙的光降解增强和催化再利用性能起重要作用。