(1. 湖南理工學(xué)院 化學(xué)化工學(xué)院，岳陽(yáng) 414006；
2. 中南大學(xué) 化學(xué)化工學(xué)院，長(zhǎng)沙 410083；
3. 湖南理工學(xué)院 精細(xì)石油化工催化與分離湖南省重點(diǎn)實(shí)驗(yàn)室，岳陽(yáng) 414006)
摘 要: 以葡萄糖為模板、聚乙二醇(PEG-4000)為分散劑通過(guò)一步水熱法所得前驅(qū)體，經(jīng)600 ℃焙燒4 h得到CuO/Al2O3光催化劑，并對(duì)樣品進(jìn)行XRD、SEM、TEM、BET、TG/DTA和XPS等表征分析。在模擬太陽(yáng)光照射下，以甲基橙溶液的光催化降解考察樣品的光催化活性，研究焙燒溫度、添加PEG-4000對(duì)樣品光催化活性的影響。結(jié)果表明：PEG-4000的添加對(duì)產(chǎn)物的晶相和比表面積有一定影響；當(dāng)焙燒溫度600 ℃，加入10%PEG-4000到前驅(qū)體CuO/Al2O3中時(shí)，光催化活性最佳；光照60 min后，0.5 g/L光催化劑用量對(duì)甲基橙的脫色率達(dá)96.7％，與未加PEG-4000的樣品比較，相同條件下對(duì)甲基橙的脫色率提高6.5%。
關(guān)鍵字: CuO/Al2O3光催化劑；聚乙二醇；光催化降解；甲基橙
（1. School of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang 414006, China;
2. School of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China;
3. Hunan Province Key Laboratory of Catalysis and Separation of Speciality Petrochemicals,
Hunan Institute of Science and Technology, Yueyang 414006, China）
Abstract:CuO/Al2O3 photocatalysts were prepared via one-pot hydrothermal process using glucose as template and polyethylene glycol (PEG-4000) as dispersion agent after calcination at 600 ℃ for 4 h. The as-prepared samples were characterized by XRD, SEM, TEM, BET, TG/DTA and XPS. The effect of PEG-4000 on crystallite phase and BET was observed. The photocatalytic activities of the as-obtained samples were evaluated by the degradation of methyl orange (MO) solution under simulated sunlight irradiation. The effects of calcination temperature and addition of PEG-4000 on the photocatalytic activity were investigated. The results show that the highest photocatalytic degradation efficiency is observed when adding 10% (mass fraction) PEG-4000 into CuO/Al2O3 in the starting materials and calcination temperature of 600 ℃. The maximum photocatalytic decoloration rate of MO is 96.7% within 60 min at photocatalyst concentration of 0.5 g/L, which increases by 6.5% compared to that of the sample without PEG-4000 under the same conditions.
Key words: CuO/Al2O3 photocatalyst; polyethylene glycol; photocatalytic degradation; methyl orange
