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基于铜络合物的分解性质,提出一种制备具有介孔结构CuO纳米颗粒的简易方法。通过2-氨基烟酸(Hanic)与硝酸铜(Ⅱ)反应,制备一种具有微晶片行貌的新型铜络合物[Cu(anic)_2]·0.75H_2O(anic=2-氨基烟酸根)。元素分析和傅里叶红外光谱(FTIR)分析结果表明,该铜络合物的化学组成为CuC_(12)H_(11.5)N_4O_(4.75)。铜络合物在550℃烧结4 h后由微晶片结构转变为具有介孔结构的CuO纳米颗粒。经烧结过程后,铜络合物中归属于2-氨基烟酸盐的FTIR吸收峰完全消失,证明形成了CuO。XRD分析结果亦证明生成了CuO纯晶。SEM结果表明,CuO纳米颗粒的平均晶粒尺寸为75 mm。CuO纳米颗粒的漫反射光谱分析结果表明,其带隙能约为1.58 eV。在H_2O_2存在及经光照射5 h后,CuO纳米颗粒对罗丹明B的催化降解率达到100%。以上结果表明,所制得的CuO纳米颗粒是一种用于水处理的高效光催化剂。
Based on the decomposition properties of copper complexes, a simple method for preparing CuO nanoparticles with mesoporous structure was proposed. A novel copper complex [Cu (anic) 2] · 0.75H 2 O (anic = 2-aminonicotinate) was prepared by reacting 2-aminonicotinic acid with copper (Ⅱ) . Elemental analysis and Fourier transform infrared spectroscopy (FTIR) analysis showed that the chemical composition of the copper complex was CuC 12 H 11.5 N 4 O 4 4.75. The copper complex was transformed into a CuO nanoparticle with mesoporous structure by the microchip structure after sintering at 550 ℃ for 4 h. After the sintering process, the FTIR absorption peak attributed to 2-aminonicotinate in the copper complex completely disappeared, proving the formation of CuO. XRD analysis also proved that pure CuO crystals were formed. SEM results show that the average grain size of CuO nanoparticles is 75 mm. The diffuse reflectance spectra of CuO nanoparticles show that the band gap energy is about 1.58 eV. In the presence of H 2 O 2 and light irradiation for 5 h, the catalytic degradation rate of CuO nanoparticles to Rhodamine B reached 100%. The above results show that the prepared CuO nanoparticles is an efficient photocatalyst for water treatment.