CuO对贵金属/CeO_2/Al_2O_3催化剂的作用

制备含少量贵金属Ｐｔ、Ｐｄ 的不同Ｃｕ 和Ｃｅ摩尔含量比（０∶１０，１∶９，２∶８）的催化剂，实验条件下加入ＣｕＯ可以提高Ｐｔ催化剂的二效活性；加入Ｃｕ∶Ｃｅ＝ ２∶８ 的ＣｕＯ降低了Ｐｄ 催化剂的三效性能，然而Ｃｕ∶Ｃｅ＝ １∶９时可以改善Ｐｄ 催化剂的三效催化性能⒚通过结构分析，认为ＣｕＯ的存在可以提高Ｐｄ 催化剂的比表面积，改善ＰｄＯ的分散度     

Sonocatalytic degradation of methyl orange in the presence of (nanometer and ordinary) anatase TiO2 powders

The nanometer and ordinary anatase titanium dioxide(TiO2 ) powders were adopted as the sonocatalysts for the degradation of methyl orange used as a model compound for the first time. It was found that the sonocatalytic degradation effect of methyl orange in the presence of TiO2 powder were much better than that without TiO2, but the sonocatalytic activity of the nanometer anatase TiO2 particle was obviously higher than that of ordinary anatase TiO2 particle. Although there are many factors influencing sonocatalytic degradation of methyl orange, the experimental results showed that the best degradation ratio of methyl orange could be obtained when the experimental conditions were: initial concentration 15 mg/L, nanometer anatase TiO2 adding amount 750 mg/L, ultrasonic frequency 40 kHz, output power 50 W, pH = 3.0 and temperature 40℃ within 150 min. In addition, the catalytic activity of reused nanometer anatase TiO2 catalyst was also studied and found to decline gradually comparing with initial nanometer anatase TiO2 catalyst. All experiments indicated that the method of the sonocatalytic degradation of organic pollutants in the presence of TiO2 powder was an advisable choice for non-or lowtransparent organic wastewaters.     

应用流式细胞分析技术研究微纳尺度SiO2对雄性大鼠睾丸生精细胞的毒性作用

为了进一步研究纳米与微米尺度SiO2对雄性大鼠的生殖毒性作用,选择不同剂量的纳米SiO2(20～40nm)与微米SiO2(1～10μm),采用气管滴注方式对雄性Wistar大鼠分组染毒.于染毒5周后处死大鼠,应用流式细胞技术对睾丸生精细胞进行分析.结果表明:1)高、低剂量纳米SiO2组及高剂量微米SiO2组细胞凋亡率均显著高于对照组;2)与对照组相比,高、低剂量纳米SiO2组及高剂量微米SiO2组1C细胞显著减少,4C细胞显著增加;3)与对照组相比,高剂量纳米SiO2组和高剂量微米SiO2组G0/G1期细胞比例显著降低,高剂量纳米SiO2组G2/M期细胞比例显著增加.结果提示纳米SiO2能够阻滞细胞周期进程,诱导生精细胞凋亡;与微米SiO2相比,纳米SiO2对大鼠睾丸生精细胞的损伤有更严重的趋势.     

Innovatively employing magnetic CuO nanosheet to activate peroxymonosulfate for the treatment of high-salinity organic wastewater

Magnetic CuO nanosheet(Mag-CuO), as a cheap, stable, efficient and easily separated peroxymonosulfate(PMS) activator, was prepared by a simple one-step precipitation method for the removal of organic compounds from salt-containing wastewater.The experiments showed that the removal efficiencies of various organic pollutants including Acid Orange 7, Methylene Blue, Rhodamine B and atrazine in a high-salinity system(0.2 mol/L Na_2SO_4) with the Mag-CuO/PMS process were 95.81%, 74.57%, 100% and 100%,respectively.Meanwhile, Mag-CuO still maintained excellent catalytic activity in other salt systems including one or more salt components(NaCl, NaNO_3, Na_2HPO_4, NaHCO_3).A radical-quenching study and electron paramagnetic resonance analysis confirmed that singlet oxygen(~1O_2) was the dominant reactive oxygen species for the oxidation of organic pollutants in high-salinity systems, which is less susceptible to hindrance by background constituents in wastewater than radicals(~·OH or SO_4~(·-)).The surface hydroxylation of the catalyst and catalytic redox cycle including Cu and Fe are responsible for the generation of~1O_2.The developed Mag-CuO catalyst shows good application prospects for the removal of organic pollutants from saline wastewater.     

含有机硫废碱液的综合利用

采用ＣｕＯ沉淀剂与含有机硫废碱液进行固液反应,经过滤回收ＮａＯＨ,碱液中的有机硫由滤渣吸附除去,灼烧滤渣得到的ＣｕＯ可循环使用,并可得到副产品Ｎａ２Ｓ２Ｏ５。最佳的试验条件为;Ｃｕ：Ｓ＝１．５６;１,反应温度２０－３０℃,反应时间３０ｍｉｎ,滤渣灼烧温度９００－９５０℃,灼烧时间３０ｍｉｎ。     

ACF负载催化剂制备对烟气脱硝影响的研究

介绍了采用浸渍法在活性炭纤维(ACF)上负载铜盐制备烟气脱硝催化剂的方法,探索了催化剂制备过程中焙烧温度、催化剂的负载方式、铜盐负离子的种类、催化组分负载量对催化剂催化活性的影响规律,实验结果表明,最佳焙烧温度范围为250～300℃,多次浸渍负载比一次浸渍负载效果要好,采用Cu(NO3)2作为负载铜离子的溶液,催化性能更好。     

B／Y^3＋共掺杂纳米TiO2催化剂的制备及其降解甲醛的光催化性能评价

为了提高室内环境空气质量,本论文开展了光催化剂制备的研究。本论文采用溶胶-凝胶法制备B／Y^3＋共掺杂TiO2复合光催化材料,以甲醛为降解物质,在紫外和可见光下分别研究了复合催化剂的光催化活性,对不同掺杂对光催化活性的影响、光催化剂的稳定性进行了分析。B／Y^3＋共掺杂TiO2复合光催化材料大大提高了催化剂的活性,对甲醛降解有较高的效率。     

CTS/CuO/ACF聚酯功能复合膜吸附及光催化性能

采用水热合成法制备了纳米级CuO颗粒粉末,XRD表征显示所制备的CuO催化剂晶型为单斜晶体。采用浸渍法制备CTS/CuO/ACF聚酯功能复合膜,研究了膜中不同组分对5mg/LNP吸附所起的作用,并研究了pH值、温度对复合膜吸附NP的影响以及不同CuO负载量对复合膜光催化性能的影响。研究显示,酸性条件、提高温度均有利于复合膜对NP的吸附去除,氧化铜负载量增加有利于光催化净化能力提高。此外,多次连续吸附实验证明,CTS/CuO/ACF复合膜可重复利用性高,并且如果经过光催化再生其吸附去除壬基酚能力仍然能达到75%以上。     

超临界干燥制备TiO_2/蒙脱土光催化剂及性能研究

文章采用溶胶凝胶法结合超临界流体干燥法制备了纳米级TiO2/蒙脱土光催化剂,以苯酚光催化降解为反应模型,探讨了煅烧温度、不同用量的蒙脱土对光催化活性的影响。研究结果表明,煅烧温度为600℃,蒙脱土为44.1%时制的TiO2/蒙脱土光催化剂的光催化性能最好。并用XRD、TEM等手段进行了表征。TiO2以锐钛矿型形式存在。由超临界干燥法制备的光催化剂具有粒径小,比表面积大,光催化活性高等特点。     

从含锑烟尘中制备纳米立方晶型Sb_2O_3

以含锑烟尘为原料,经脱杂处理后,采用真空蒸发法制备了立方晶型纳米三氧化二锑,并用XRD衍射和SEM扫描电镜对产物三氧化二锑进行表征。结果表明,制备的三氧化二锑为立方晶型,颗粒粒径为35~100 nm。实验考察了脱杂时间对脱杂效果的影响;考察了蒸发温度、压强、蒸发时间3个因素对三氧化二锑颗粒粒度的影响。