Liu Baishu, Zhang Juanfeng
Shenzhen Angel Drinking Water Industrial Group Corporation Angel Industrial Park, Baoan District Shenzhen Guangdong 518108 China
RSC Adv. 2020 Jul 9;10(43):25952-25957. doi: 10.1039/d0ra04337k. eCollection 2020 Jul 3.
This paper reports the pH sensing capability of a ruthenium oxide (RuO) and iridium oxide (IrO) coated titanium (ROIOT) electrode. The characterization results indicated that the ROIOT electrode had a cracked morphology. The RuO and IrO particles were decorated on the surface of the electrode. The ROIOT electrode showed near-Nernstian sensitivity of -50.8 mV pH, with a wide detection range of pH 2-12. The response time was 4.0-13.5 s, which was fast and very sensitive to the pH change. The ROIOT electrode also demonstrated great detection reversibility and stability in various pH conditions. In the long-term experiment of 30 d, potential measurements using the ROIOT electrode had a minor fluctuation of 1.5 mV d. The practical application of the ROIOT electrode was demonstrated by measuring the pH values of various buffer solutions and complex samples. With the advantages of low cost and simple production, it is believed that the ROIOT electrode could be a promising candidate for use as a sensing material for pH sensor development.
本文报道了一种氧化钌（RuO）和氧化铱（IrO）包覆钛（ROIOT）电极的pH传感能力。表征结果表明，ROIOT电极具有裂纹形态。RuO和IrO颗粒装饰在电极表面。ROIOT电极显示出-50.8 mV/pH的近能斯特灵敏度，pH检测范围宽，为2-12。响应时间为4.0-13.5 s，响应速度快，对pH变化非常敏感。ROIOT电极在各种pH条件下也表现出良好的检测可逆性和稳定性。在30天的长期实验中，使用ROIOT电极进行的电位测量有1.5 mV/d的微小波动。通过测量各种缓冲溶液和复杂样品的pH值，证明了ROIOT电极的实际应用。由于具有低成本和生产简单的优点，相信ROIOT电极有望成为用于开发pH传感器的传感材料。
