scholarly journals Enhanced Electrochemical Performance of Biomass Porous Carbon Adsorption Congo Red

2022 ◽  
Author(s):  
hui xu ◽  
Yuanhai Bao ◽  
Shasha Zuo ◽  
Pengdong Chen ◽  
Yuanqiang Zhu ◽  
...  
Keyword(s):  
Porous Carbon ◽  
Congo Red ◽  
Organic Dyes ◽  
Adsorption Property ◽  
Organic Dye ◽  
Energy Storage Materials ◽  
Light Emitting ◽  
Symmetric Supercapacitor ◽  
Capacitance Performance ◽  
Cr Concentration

Abstract Biomass porous carbon has received widespread attention due to its application as electrode material for supercapacitors and adsorbent for difficult-to-degrade organic dyes. In this paper, biomass porous carbon KGL is prepared using ginkgo leaves as the precursor and KOH as the activator. Capitalizing on the adsorption property of porous carbon, an azo dye Congo red (CR) is confined into the nanopores of KGL to fabricate the KGL/CR electrode. The result suggests that KGL has good adsorption performance for organic dye and KGL/CR has excellent capacitance performance. When the CR concentration is 500 mg L-1, the adsorption capacity of KGL is 495 mg g-1. KGL/CR-500 displays elevated specific capacitance of 393 F g-1 at 1 A g-1 and excellent rate performance (76.3% capacitance retention at 10 A g-1). The capacitance retention after 10000 cycles maintains 99%. The symmetric supercapacitor has power density of 699.8 W kg-1 at an energy density of 16.4 Wh kg-1 and can power a light emitting diodes (LED). Our work provides the information that one is the treatment of organic dye wastewater, the other is development of electrochemical energy-storage materials, and may be expanded to the resource-utilization of other versatile effluent containing the redox groups.

scholarly journals From Waste to Biosorbent: Removal of Congo Red from Water by Waste Wood Biomass

Water ◽  
2021 ◽  
Vol 13 (3) ◽  
pp. 279 ◽  
Author(s):  
Marija Stjepanović ◽  
Natalija Velić ◽  
Antonela Galić ◽  
Indira Kosović ◽  
Tamara Jakovljević ◽  
...  
Keyword(s):  
Removal Efficiency ◽  
Congo Red ◽  
Contact Time ◽  
Synthetic Wastewater ◽  
Wood Biomass ◽  
Waste Wood ◽  
Biosorption Capacity ◽  
Biosorption Process ◽  
Cr Concentration ◽  
Cr Removal

The aim of the study was to screen the waste wood biomass of 10 wood species as biosorbents for synthetic dye Congo Red (CR) removal from water and to single out the most efficient species for further batch biosorption experiments. Euroamerican poplar (EP), the most efficient species achieving 71.8% CR removal and biosorption capacity of 3.3 mg g−1, was characterized by field emission scanning electron microscopy (FE-SEM) and Fourier transform infrared spectroscopy (FTIR). Different factors affecting the biosorption process were investigated: initial biosorbent concentration (1–10 g dm−3), contact time (5–360 min), initial CR concentration (10–100 mg dm−3), and the initial pH (pH = 4–9). The results showed that CR removal efficiency increased with the increase of biosorbent concentration and contact time. Increase of initial CR concentration led to an increase of the biosorption capacity, but also a decrease of CR removal efficiency. The highest CR removal efficiency was achieved at pH = 4, while at pH = 9 a significant decrease was noticed. The percentage of CR removal from synthetic wastewater was 18.6% higher than from model CR solution. The Langmuir model fitted well the biosorption data, with the maximum biosorption capacity of 8 mg g−1. The kinetics data were found to conform to the pseudo-second-order kinetics model.

scholarly journals Dopamine Assisted One-Step Pyrolysis of Glucose for the Preparation of Porous Carbon with A High Surface Area

Nanomaterials ◽  
2018 ◽  
Vol 8 (10) ◽  
pp. 854 ◽  
Author(s):  
Hanbo Xiao ◽  
Cheng-an Tao ◽  
Yujiao Li ◽  
Xianzhe Chen ◽  
Jian Huang ◽  
...  
Keyword(s):  
Surface Area ◽  
Porous Carbon ◽  
Carbon Materials ◽  
High Current Density ◽  
High Surface ◽  
High Surface Area ◽  
Energy Storage Materials ◽  
One Pot ◽  
Component Structure ◽  
Porous Carbon Materials

Herein, a facile dopamine assisted one-pot synthesis approach is proposed for the preparation of porous carbon with a specific surface area (SSA) up to 2593 m2/g through the direct pyrolysis of a mixture of glucose, NH4Cl, and dopamine hydrochloride (DAH). The glucose is adopted as the carbon source and foaming agent, NH4Cl is used as the blowing agent, and DAH is served as collaborative carbon precursor as well as the nitrogen source for the first time. The effect of dopamine on the component, structure, and SSA of the as-prepared porous carbon materials are systematically studied. The moderate addition of dopamine, which influences the condensation and polymerization of glucose, matches better with ammonium salt decomposition. The SSA of porous carbon increases first and then decreases with the increasing amount of dopamine. In our case, the porous carbon produced with 5 wt% dopamine (PC-5) achieves the maximum SSA of up to 2593 m2/g. Accordingly, it also shows the greatest electrochemical performance. The PC-5 shows a capacitance of 96.7 F/g calculated from the discharge curve at 1 A/g. It also has a good capacitive rate capacity, the specific capacitance can still maintain 80%, even at a high current density of 10 A/g. Moreover, PC-5 exhibits a good cycling stability of 98.1% capacitive retention after 1000 cycles. The proposed method may show promising prospects for preparing porous carbon materials as advanced energy storage materials, storage, and catalyst supports.

scholarly journals Bioremediation of organic dyes using combination of plants ash

2019 ◽  
Vol 7 (2) ◽  
pp. 240-246
Author(s):  
Kaur Harpreet ◽  
Kaur Harpreet ◽  
Vandana Kamboj ◽  
Vandana Kamboj
Keyword(s):  
Aqueous Solution ◽  
Methylene Blue ◽  
Methyl Orange ◽  
Crystal Violet ◽  
Congo Red ◽  
Organic Dyes ◽  
Low Cost ◽  
Sem Image ◽  
Orange Peels

Water is the most crucial thing to mankind and so its contamination by various agencies is posing a threat to the natural balance. So, in the present work, the efficiency of various adsorbents derived from plant waste, to remove different dyes from aqueous solution was evaluated. Parameters for study were contact time, concentration and pH. Various combinations of plant ashes were used for the study. It was found that adsorbent prepared from the combination of orange peels, pomegranate and banana peels ashes, exhibited good adsorption capacity for methylene blue, congo red and crystal violet. All these dyes were completely removed from the aqueous solution while methyl orange was not removed. Congo red was removed completely within 40 min of contact with the adsorbent while methyl orange took 3 hrs to be removed to the extent of 48% only. The adsorption coefficient of congo red was found to be 2.33 while value for methylene blue and crystal violet was 1 and 1.66 respectively. The characterization of adsorbent was done by Scanning Electron Microscopy and IR spectroscopy. SEM image revealed the surface of adsorbent to be made of differential pores. From the results it became evident that the low-cost adsorbent could be used as a replacement for costly traditional methods of removing colorants from water.

scholarly journals Photocatalytical Degradation of Congo Red Azo Dye Using Phosphono-Aminoacid-Cd(II) Pendant Groups Grafted on a Polymeric Support

2019 ◽  
Vol 70 (10) ◽  
pp. 3473-3476 ◽  
Author(s):  
Laura Cocheci ◽  
Lavinia Lupa ◽  
Aniela Pop ◽  
Aurelia Visa ◽  
Bianca Maranescu ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Congo Red ◽  
Azo Dye ◽  
Organic Dyes ◽  
Degradation Process ◽  
Polymer Support ◽  
Polymeric Support ◽  
Vis Spectroscopy ◽  
Red Dye ◽  
Scanning Electron

In the present study, a new compound was used for decontaminating water polluted by Congo Red dye. Phosphono-aminoacid-Cd(II) pendant groups grafted on a polymeric support was prepared using impregnation of a polymer support functionalized with phosphono-aminoacid groups with an aqueous solution of Cd(NO3)2x4H2O. The catalyst was characterized by Fourier transform infrared ray, scanning electron microscope, termogravimetric analysis UV-Vis spectroscopy. The results suggest that the studied material could efficiently be used as photocatalyst in the degradation process of waters containing organic dyes under UV-Vis light irradiation.

scholarly journals Naturally Derived Organic Dyes for LED Lightings of High Color Rendering and Fidelity Index

2021 ◽  
Author(s):  
Yunping Huang ◽  
Theodore A. Cohen ◽  
Christine K. Luscombe
Keyword(s):  
Excited State ◽  
Organic Dyes ◽  
Continuous Emission ◽  
Light Emitting ◽  
Organic Hybrid ◽  
Industry Standard ◽  
Color Rendering Index ◽  
The Cost ◽  
Color Rendering ◽  
Excellent Color

<p>Light-emitting diodes (LEDs) are a lighting technology with a huge and ascending market. Typically, LED backlights are often paired with inorganic phosphors made from rare-earth elements (REEs) to tune the emission lineshapes for different applications. However, REE production is a resource-intensive process with many negative environmental impacts. Herein we develop organic hybrid LEDs using organic dyes synthesized from an abundant and non-toxic natural product (theobromine) to replace REE phosphors. The resulting hybrid LED generates continuous emission from 400 – 740 nm, resulting in high color rendering index (the current industry standard) of 90 and color fidelity index (the most advanced and comprehensive standard) of 92, challenging commercial LEDs based on REE phosphors. In addition, the light-converting composite is made from 99 wt% SBS, an inexpensive industrial polymer, and 1wt% theobromine dyes, reducing the cost of the light converter to ¢1.30 for a 1 W LED, compared to approximately ¢ 19.2 of commercial products. The light converting efficiency of the dye-SBS composite is 82%. Excited state kinetics experiments were also conducted to provide guidance to further increase the light-converting efficiency of the theobromine dyes while maintaining excellent color rendering and fidelity. </p>

Potential Application of Indigenous Microorganism Derived Biosorbent in the Efficient Removal of Congo Red from Aqueous Solution

2021 ◽  
Vol 9 (2) ◽  
pp. 54-64
Author(s):  
Lalmalsawm dawngliani ◽  
◽  
Gospel Lallawmzuali ◽  
Samuel Lallianrawna ◽  
Thanhming liana ◽  
...  
Keyword(s):  
Congo Red ◽  
Anaerobic Fermentation ◽  
Background Electrolyte ◽  
Analytical Techniques ◽  
Waste Biomass ◽  
Sorption Data ◽  
Indigenous Microorganism ◽  
Physico Chemical ◽  
Freundlich Adsorption Isotherm ◽  
Cr Concentration

IMO compost was obtained using Indigenous Microorganisms (IMO) as inoculant through anaerobic fermentation process from kitchen waste biomass. The Physico-chemical analysis of the solid was obtained by taking pH, MC, OM, OC, N, K and P content. The biosorbent material was further characterized by SEM, IR and BET analytical techniques. Various physico-chemical parametric studies viz. effect of pH, initial dye concentration and background electrolyte concentrations are performed in the removal of Congo red (CR) dye using the IMO compost. The lower pH condition pH < 6.0 favoured the removal of Congo red and the percent removal was decreased with increase in the CR concentration. The removal of Congo red followed the pseudo-second order rate kinetics and the equilibrium state sorption data was reasonably fitted well to the Freundlich adsorption isotherm. In addition, the minimal effect of background electrolyte concentrations (0.0001 to 0.1 mol/L NaNO3) in the removal of CR inferred a specific sorption of Congo red forming ‘inner sphere’ complexes at the surface of the biosorbent.

Photocatalytic Decomposition of Organic Dyes Using a Rotating Cylinder System

2021 ◽  
Vol 21 (8) ◽  
pp. 4544-4552
Author(s):  
Young-Sang Cho ◽  
Sohyeon Sung
Keyword(s):  
Rate Constant ◽  
Organic Dyes ◽  
Outer Cylinder ◽  
Rotating Cylinder ◽  
Organic Dye ◽  
Photocatalytic Decomposition ◽  
Nanoparticle Dispersion ◽  
Batch Mode ◽  
Factors Affecting ◽  
Repeated Batch

In this study, a rotating cylinder system was used in the photocatalytic decomposition of organic dyes in aqueous medium for water purification. To this end, the titania nanoparticle dispersion was mixed with an organic dye solution under a rotating inner cylinder at controlled speed. The rate constant was adjusted by changing the speed of rotation to determine the optimal circulating velocity. Since nanoparticle dispersion is a secondary contaminant after wastewater treatment, the titania paste was deposited on the inner surface of the stationary outer cylinder to form a photocatalytic film. During repeated batch-mode operation, the deactivation of the deposited film was analyzed by measuring the rate constant as a function of time. Continuous operation was also used to remove organic dye in the water to study factors affecting the removal efficiency of methylene blue. Higher rotating velocity and slow feed rate facilitated the removal of contaminants via desorption of adsorbed dyes with adequate retention time.

Dual-wavelength lasing from organic dye encapsulated metal–organic framework microcrystals

2019 ◽  
Vol 55 (24) ◽  
pp. 3445-3448 ◽  
Author(s):  
Yue Zhang ◽  
Haiyun Dong ◽  
Yuan Liu ◽  
Chunhuan Zhang ◽  
Fengqin Hu ◽  
...  
Keyword(s):  
Organic Dyes ◽  
Metal Organic Framework ◽  
Organic Dye ◽  
Dual Wavelength ◽  
Metal Organic ◽  
Organic Framework

Efficient and stable dual-wavelength microlasers are obtained by simultaneously incorporating two kinds of organic dyes into metal–organic framework microcrystals.

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