The status and developments of leather solid waste treatment: a mini-review By: 34 (5),399-408 doi

Preparation and characterization of hierarchical porous carbons derived from solid leather waste for supercapacitor applications
Volume:318 Page:173-185, DOI:10.1016/j.jhazmat.2016.06.037, 2016
Abstract
Utilization of crust leather waste (CLW) as precursors for the preparation of hierarchical porous carbons (HPC) were investigated. HPCs were prepared from CLW by pre-carbonization followed by chemical activation using KOH at relatively high temperatures. Textural properties of HPC's showed an extent of micro-and mesoporosity with maximum BET surface area of 716 m(2)/g. Inducements of graphitic planes in leather waste derived carbons were observed from X-ray diffraction and HR-TEM analysis. Microstructure, thermal behavior and surface functional groups were identified using FT-Raman, thermo gravimetric analysis and FT-IR techniques. HPCs were evaluated for electrochemical properties by cyclic voltammetry (CV), galvanostatic charge/discharge (GCD) and electrochemical impedance spectroscopy (EIS) by three electrode system. CLC9 sample showed a maximum capacitance of 1960 F/g in 1 M KCl electrolyte. Results achieved from rectangular curves of CV, GCD symmetric curves and Nyquist plots show that the leather waste carbon is suitable to fabricate supercapacitors as it possess high specific capacitance and electrochemical cycle stability. The present study proposes an effective method for solid waste management in leather industry by the way of converting toxic leather waste to new graphitic porous carbonaceous materials as a potential candidate for energy storage devices. (C) 2016 Elsevier B.V.
Ierarxik gözenekli uglerodlarni (HPC) tayyorlash uchun kashshof sifatida qobiq teri chiqindilaridan (CLW) foydalanish o'rganildi. HPClar CLW dan oldindan karbonlashtirish, so'ngra nisbatan yuqori haroratlarda KOH yordamida kimyoviy faollashtirish orqali tayyorlangan. HPC ning teksturaviy xossalari maksimal BET sirt maydoni 716 m (2)/g bo'lgan mikro va mezoporozlik darajasini ko'rsatdi. Rentgen nurlari difraksiyasi va HR-TEM tahlillari natijasida teridan olingan uglerodlardagi grafit tekisliklarining induktsiyalari kuzatildi. FT-Raman, termogravimetrik tahlil va FT-IR texnikasi yordamida mikrostruktura, issiqlik harakati va sirt funktsional guruhlari aniqlandi. HPClar elektrokimyoviy xususiyatlar uchun tsiklik voltametriya (CV), galvanostatik zaryad / deşarj (GCD) va elektrokimyoviy impedans spektroskopiyasi (EIS) uchta elektrod tizimi tomonidan baholandi. CLC9 namunasi 1 M KCl elektrolitida 1960 F/g maksimal sig'imni ko'rsatdi. CV, GCD simmetrik egri chiziqlari va Nyquist chizmalarining toʻrtburchaklar egri chiziqlaridan olingan natijalar shuni koʻrsatadiki, teri chiqindilari uglerod superkondensatorlar ishlab chiqarish uchun mos keladi, chunki u yuqori oʻziga xos sigʻim va elektrokimyoviy aylanish barqarorligiga ega. Ushbu tadqiqot zaharli teri chiqindilarini energiyani saqlash qurilmalari uchun potentsial nomzod sifatida yangi grafitli gözenekli karbonli materiallarga aylantirish orqali teri sanoatida qattiq chiqindilarni boshqarishning samarali usulini taklif qiladi.