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二聚脂肪酸具有特异的分子结构和特性,可生成许多衍生物,其中聚酰胺树脂是最重要的一种,且由聚酰胺树脂所制备的油墨具有良好的溶解性、耐腐蚀性、亲水性等优良性能。本文主要介绍了二聚酸基聚酰胺树脂的特性,及其在油墨连接料合成中的应用研究,并展望了其发展前景。 相似文献
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实验以H_2O_2,乙腈、Fe(NO_3)_3·9H_2O、FeSO_4·7H_2O,为试剂,以自制光催化反应器制备了萘酚。研究了Photo-Fenton和Photo-Fenton-like反应体系中萘的羟基化反应,考察了Fe~(2+)、Fe~(3+)浓度、H_2O_2浓度、反应时间等因素对两种反应体系的影响。对于Photo-Fenton反应体系中,在[Fe~(2+)]=1.5mmol/L、[H_2O_2]=0.8 mol/L条件下,萘的转化率达43%,1-萘酚的收率为2.8%。对于Photo-Fenton-like反应体系,在[Fe~(3+)]=4.5 mmol/L,[H_2O_2]=0.2 mol/L条件下,萘的转化率为17%,1-萘酚的收率达4.6%;同条件下[H_2O_2]提高至1.0 mol/L时,萘的转化率可达90%,但1-萘酚的收率却有所下降。 相似文献
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以剥离膨润土(EB)为载体,采用原位沉积-沉淀法制备出n-p异质结型Ag3PO4-LaFeO3/EB-40%(40%为LaFeO3的掺杂量,以Ag3PO4和LaFeO3的质量计,下同)复合光催化剂.通过XRD、TEM、XPS、UV-Vis DRS、BET、EIS、瞬态光电流对材料的形貌、晶形结构、光吸收性能、比表面积及光电化学特性进行了表征分析.结果表明,Ag3PO4与LaFeO3形成了紧密的n-p异质结并均匀分散在EB表面,提高了材料对可见光的利用,拓宽了Ag3PO4的光吸收范围,有效促进了光生电子-空穴对的分离.以可见光降解模拟苯酚废水来评价材料的光催化性能,发现Ag3PO4-LaFeO3/EB-40%的速率常数约为纯Ag3PO4的4.2倍,在中性条件下苯酚的降解率约为97.0%,且循环4次后苯酚的降解率仍可达81.6%. 相似文献
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Preparation and photocatalytic activity of La^3+ and Eu^3+ co-doped TiO2 nanoparticles: photo-assisted degradation of methylene blue 总被引:1,自引:1,他引:0
Rare earth ions La3+ and Eu3+ co-doped TiO2 photocatalyst (La-Eu/TiO2) was prepared by sol-gel method, and characterized by various techniques such as X-ray diffraction (XRD), specific surface area and porosity (BET and BJH), scanning electron microscopy (SEM), high resolution transmission electron microscopy (HRTEM), UV-vis diffuse reflectance spectroscopy (DRS) and X-ray photoelectron spectroscopy (XPS). The photocatalytic activity of the La-Eu/TiO2 was evaluated by the degradation of methylene blue (MB) under UV light irradiation. The catalyst had a relatively uniform particle diameter distribution in the range of 40–60 nm. When calcining at 600°C, the XRD patterns of La-Eu/TiO2 indicated the anatase phase, while the XPS patterns showed the Ti4+, La3+ and Eu3+ ions existence. The DRS spectra showed red shift in the band-gap transition. The experimental results of MB degradation demonstrated that the photocatalytic activity of La-Eu/TiO2 was significantly enhanced due to better separation of photogenerated electron-hole pairs. 相似文献
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Rare earth ions La3+ and Eu3+ co-doped TiO2 photocatalyst (La-Eu/TiO2) was prepared by sol-gel method, and characterized by various techniques such as X-ray diffraction (XRD), specific surface area and porosity (BET and BJH), scanning electron microscopy (SEM), high resolution transmission electron microscopy (HRTEM), UV-vis diffuse reflectance spectroscopy (DRS) and X-ray photoelectron spectroscopy (XPS). The photocatalytic activity of the La-Eu/TiO2 was evaluated by the degradation of methylene blue (MB) ... 相似文献
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