Sensors and Actuators B: Chemical ( IF 8.0 ) Pub Date : 2017-11-16 , DOI: 10.1016/j.snb.2017.11.057 Jianshuai Mu , Jie Li , Xin Zhao , En-Cui Yang , Xiao-Jun Zhao
Novel and uniform urchin-like Co9S8 nanomaterials assembled with needle-like nanorods were synthesized by a facile two-step hydrothermal process, and were found to exhibit intrinsic peroxidase-like activity. As a new peroxidase mimic, their catalytic properties, kinetics and mechanism were studied in depth by several techniques. The results showed that the catalytic activity of urchin-like Co9S8 nanomaterials was highly efficient, which was arised from high electron-transfer ability of their unique morphology. Interestingly, using the peroxidase-like activity of urchin-like Co9S8 nanomaterials, a novel off-on sensor for detection of Cu2+ was constructed. The sensor showed a good linear range of 0.5–10 μM with a low detection limit of 0.09 μM. The proposed method was successfully applied for Cu2+ determination in real samples with satisfactory results.
中文翻译:
具有高效内在过氧化物酶样活性的新型类urchin的Co 9 S 8纳米材料,用于比色感应铜(II)离子
通过一种简便的两步水热法合成了新颖且均匀的,由针状纳米棒组装而成的,类似顽童状的Co 9 S 8纳米材料,并发现其具有固有的过氧化物酶活性。作为一种新的过氧化物酶模拟物,通过几种技术对它们的催化性能,动力学和机理进行了深入研究。结果表明,由于其独特形态的高电子传递能力,类顽固的Co 9 S 8纳米材料具有很高的催化活性。有趣的是,利用类似Urchin的Co 9 S 8纳米材料的过氧化物酶活性,可检测新型Cu 2+的开关传感器建造了。传感器的线性范围为0.5–10μM,检测极限为0.09μM。该方法成功用于实际样品中Cu 2+的测定,结果令人满意。