A glassy carbon electrode (GCE) was decorated with polyaniline, ZrO₂-SO₄²⁻ and multi walled carbon nanotubes (MWCNT) nanostructures to supply a sensor devise for Cr(VI) ions measurement, here. The aniline was polymerized in phosphoric acid solution by using peroxydisulfate as an initiator. ZrO₂-SO₄²⁻ nanostructures were synthesized by mono ethanolamine as reducing agent. The fabricated PANI@ZrO₂-SO₄^2-@MWCNT nanocomposite (PZrS nanocomposite) was then characterized by XRF, XRD, SEM, EDX and FT-IR techniques. Cyclic voltammograms on bare and modified electrodes show that electro-reduction of Cr(VI) is quicker on PZrS nanocomposite modified electrode. The presence of nanocomposite at the surface of electrode reduces the over potential for Cr(VI) reduction and shifts the potential value about −273 mV. Using differential pulse voltammetry, a detection limit of 64.3 nmol L^-1was calculated for Cr(VI). Finally, the designed devise successfully was used to measure Cr(VI) ions in wastewater resulted from the industrial barium chromate production line.

在玻璃碳电极（GCE）上装饰有聚苯胺，ZrO ₂ -SO ₄ ^2-和多壁碳纳米管（MWCNT）纳米结构，以在此处提供用于Cr（VI）离子测量的传感器。使用过二硫酸盐作为引发剂，使苯胺在磷酸溶液中聚合。以单乙醇胺为还原剂合成了ZrO ₂ -SO ₄ ^2-纳米结构。人造PANI @ ZrO ₂ -SO ₄ ^2-然后通过XRF，XRD，SEM，EDX和FT-IR技术对@MWCNT纳米复合材料（PZrS纳米复合材料）进行表征。裸电极和修饰电极上的循环伏安图表明，在PZrS纳米复合修饰电极上，Cr（VI）的电还原更快。电极表面纳米复合材料的存在降低了Cr（VI）还原的过电位，并将电位值移动了约-273 mV。使用差分脉冲伏安法，计算出Cr（VI）的检出限为64.3 nmol L ^-1。最后，成功地将设计的装置用于测量工业铬酸钡生产线产生的废水中的六价铬离子。