Wei Zhai,Fengqiang Sun,Wei Chen,Zizhao Pan,Lihe Zhang,Shaohua Li,Shuilan Feng,Yiyi Liao,Weishan Li
Octahedral Cu 2 O particles were prepared on an indium-tin oxide glass via electrodeposition and were employed in the catalytic degradation of p -nitrophenol in the presence of H 2 O 2 . Under irradiation of a warm visible-light source, tungsten halogen lamp, Cu 2 O particles not only acted as a photocatalyst, but might also act as a thermal-catalyst to induce the decomposition of H 2 O 2 and produce O 2 at higher temperatures. The photogenerated electrons and holes could react with H 2 O 2 , O 2 , and H 2 O to produce abundant OH radicals, resulting in the effective oxidation of p -nitrophenol. High-performance liquid chromatography measurements of degradation intermediates showed that p -nitrophenol was first decomposed into hydroquinone and benzoquinone and then mineralized. The degradation efficiency was dependent on electrodeposition time, light intensity, H 2 O 2 amount, and solution temperature. This catalyst could be easily recycled and used in the efficient degradation of other phenolic compounds.
Li Pengchong,Cai Chao,Long Yuhua,Zhu Tang,Dong Haixia,Zhu Caizhen,Zhao Ning,Xu Jian
Microsized Cu 2 O particles are widely used in tin-free marine antifouling (AF) paints. Because of the enlarged specific surface area, utilization of Cu 2 O particles with smaller sizes is a potential way to improve the AF efficiency and lower the Cu 2 O content. In this paper, the clay, commonly applied as filler in the paint, was previously used to control the concentration of free Cu 2 + during the synthesis of Cu 2 O. With the help of clay, the size of obtained Cu 2 O particles decreased from 750 to 460 nm. It has been shown that the smaller-sized Cu 2 O can work against the marine biofouling with a lower content (15 wt%) compared to the commercial microsized Cu 2 O (40 wt%) in the 260 days of marine AF field tests.
危险品化学品经营许可证（带存储）