Advanced Functional Materials for Electronics

**3**

**Chapter 1**

**Abstract**

response time.

**1. Introduction**

monitoring, reactive dye, wastewater

reactive dyes in water [1–15].

A Novel Electrochemical Sensor

for the Detection of Reactive Red

Dye to Determine Water Quality

*Rifat Kolatoğlu, Enes Aydın, Mehtap Demir, Ahmet Yıldız,* 

In this study, tragacanth gum/chitosan/ZnO nanoprism-based electrochemical sensors were prepared for sensing reactive dyes in water. To use an electrochemical sensor, a ~250 nm-sized ZnO nanoprism was synthesized via ultrasonic-assisted green synthesis method, using tragacanth gum and chitosan polymer blend as a matrix. The electrochemical properties of tragacanth gum/chitosan/ZnO nanoprisms were compared against reactive red 35, reactive yellow 15, and reactive black 194. The electrochemical measurement results indicated that prepared tragacanth gum/chitosan/ZnO nanoprism-based electrochemical sensor detected 25 ppm reactive red 35 in 1 min at room temperature. This study reveals new high-potential novel tragacanth gum/chitosan/ZnO nanoprism-based sensing material for the detection of reactive red dye-consisted wastewater with high sensitivity and short

**Keywords:** ZnO, chitosan, nanoprism, electrochemical sensor, environmental

for sensor applications due to their high surface area and surfactant functional groups. Nanomaterials with different morphologies help to adapt their applicationspecific detection properties. Therefore, researchers focus on effective detection platforms (reaction time, sensitivity, and selectivity) for the detection of aqueous reactive dyes based on different detection principles with sensors prepared with different morphological structures of nanomaterials (nanoparticles, nanowires, nanoprisms, etc.). Also, the materials in nanoscale exhibit higher dissolution and higher solubility than in microscale. Many types of nanomaterials such as metal oxide semiconductors, carbon-based nanomaterials, graphene/graphene-based nanomaterials, and metal-organic frameworks have been investigated for sensing

The physicochemical properties of nanomaterials make them suitable candidates

Electrochemical sensing method involves the measurement of the redox transformation of reactive dye molecules upon contact with the sensing nanomaterial

*Selcan Karakuş, Elif Tüzün, Nuray Beköz Üllen,* 

*Nevin Taşaltın and Ayben Kilislioğlu*

**Chapter 1**
