CAJ | 학술논문

合成了一种含 Ni 的新型稀土钙钛矿纳米氧化物 LaNiTiO3,研究了其催化活性,并以此构建了一种简单、快速、性能稳定的检测过氧化氢(H2 O2)无酶电化学传感器。采用 X-射线衍射仪、傅立叶红外光谱仪、透射电子显微镜、X-射线荧光光谱仪以及扫描电子显微镜等手段对合成材料的组成、结构和形貌等进行了表征,并通过循环伏安法和电流-时间曲线研究和优化了基于该材料构建的无酶传感体系。结果表明,以LaNiTiO3(0.5 g/ L,8.0μL)修饰的工作电极在0.1 mol/ L NaOH 中对 H2 O2呈现良好的电催化性能：响应时间短(约2 s)、线性范围宽(0.2μmol/ L ~8.0 mmol/ L)、检出限低(0.05μmol/ L, S/ N =3)、灵敏度高(957μA·L·mmol-1 cm-2)、重现性好和抗干扰能力强,优于最近报道的其它传感器,有望用于生物医学等实际样品 H2 O2检测分析中。
합성료일충함 Ni 적신형희토개태광납미양화물 LaNiTiO3,연구료기최화활성,병이차구건료일충간단、쾌속、성능은정적검측과양화경(H2 O2)무매전화학전감기。채용 X-사선연사의、부립협홍외광보의、투사전자현미경、X-사선형광광보의이급소묘전자현미경등수단대합성재료적조성、결구화형모등진행료표정,병통과순배복안법화전류-시간곡선연구화우화료기우해재료구건적무매전감체계。결과표명,이LaNiTiO3(0.5 g/ L,8.0μL)수식적공작전겁재0.1 mol/ L NaOH 중대 H2 O2정현량호적전최화성능：향응시간단(약2 s)、선성범위관(0.2μmol/ L ~8.0 mmol/ L)、검출한저(0.05μmol/ L, S/ N =3)、령민도고(957μA·L·mmol-1 cm-2)、중현성호화항간우능력강,우우최근보도적기타전감기,유망용우생물의학등실제양품 H2 O2검측분석중。
A Ni-based rare-earth perovskite LaNiTiO3 nanoparticles was synthesized and its catalytic activity was investigated. Based on this, a simple and quick nonenzyme electrochemical sensor was fabricated with stable and reliable performances for the determination of hydrogen peroxide (H2 O2 ). The techniques of X-ray diffraction, FT-IR spectra, transmission electron microscopy, X-ray fluorescene spectroscopy and scan electronmicroscope were used to characterize the composition, structure and morphology of as-synthesized sample. The sensor based on this nanomaterial was investigated and optimized by cyclic voltammetry and current-time techniques. The results showed the working electrode modified with LaNiTiO3 (0. 5 g / L, 8. 0μL) in 0. 1 mol/ L NaOH exhibited good catalytic properties for H2 O2 . Under the optimum conditions, the sensor performed excellent properties, such as quick response time ( about 2 s ), a wide linearity (0. 2 μmol/ L -8. 0 mmol/ L), a low detection limit of 0. 05 μmol/ L ( S / N = 3 ), a high sensitivity of 957 μA (mmol/ L) -1 cm-2 , good reproducibility and anti-interference ability, which was better than those of some other biosensors reported recently. So, it may be used for the analysis and detection of H2 O2 in practical samples such as biomedicine.