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Polypyrrole (PPy) has unique features such as easy synthesis, environmental stability, and high electrical conductivity (approximately 105 S/cm and even >380 S/cm) for bulk and thin‐film materials. Thus, PPy is applied in numerous well‐established applications, such as in sensors, supercapacitors, and resonators. These applications take advantage of the unique properties achieved through the structure and properties of PPy. This article comprehensively elaborates the methods used to synthesize conductive PPy, along with the important factors affecting its conductivity. Emphasis is given to versatile and basic approaches that enable control of the microstructural features that eventually determine PPy conductivity. Despite the intensive research in this area, no previous study has presented all possible relevant information about PPy fabrication and the important factors influencing its electrical conductivity. [ABSTRACT FROM AUTHOR]

[Display omitted] • PPy powder was synthesized by chemical oxidative polymerization method. • Effect of O:M molar ratio on the electrical, and optical properties are investigated. • Maximum electrical conductivity and minimum bandgap energy were achieved for O:M (2:1). • Maximum adsorption of MO and MB were also achieved for O:M (2:1). Synthetic dyes are among the common pollutants in the ecosystem. In the present study, polypyrrole (PPy) was prepared and subsequently assessed for the removal of methylene blue (MB) and methyl orange (MO) from synthetic solution. PPy powders were successfully synthesized through chemical oxidative polymerization, utilizing varying molar ratios of ferric chloride (FeCl 3) to pyrrole (Py) monomer. The effects of FeCl 3 :Py molar ratios ranging from 1:1 to 4:1 were investigated in terms of electrical and optical properties, as well as organic dye adsorption performance. The electrical conductivity reached its maximum value of 3.42 × 10−2 S/cm at the optimum FeCl 3 :Py molar ratio of 2:1 (P2), while it displayed the lowest optical bandgap energy of 3.72 eV. Beyond this molar ratio, both electrical conductivity and optical bandgap energy exhibited a declining trend. Additionally, the adsorption behavior of PPy samples with different FeCl 3 :Py molar ratio was indicated that the P2 sample exhibited the highest adsorption capacity for MO, reaching 84.65 mg.g−1 after 120 min, while its adsorption capacity for MB was 73.84 mg.g−1. The phase characterization using XRD analysis revealed the amorphous nature of the PPy powders, and FTIR results exhibited minor changes in peak intensity with increasing FeCl 3 :Py molar ratio. The synthesized PPy samples exhibited an average particle size ranging from 0.344 to 0.703 µm and a BET surface area of 2.27–3.56 m2.g−1. Besides, morphological analysis unveiled the presence of globular particles with a cauliflower-like structure, varying in size. The findings of this study hold significant implications for the fabrication of electronic devices based on PPy. Furthermore, the synthesized PPy samples exhibited promising adsorption capabilities for the removal of dyes, 84.65 mg/g for MO and 73.84 mg/g for MB dyes after 120 min, emphasizing their potential utility in environmental remediation applications. [ABSTRACT FROM AUTHOR]