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The supercapacitors cathode materials were produced with superior electrochemical stability, long service life, and low production cost, thanks to adsorption methylene blue with activated carbon. According to the results, component N and S increased from 1. 3 percent and 0–2. 91% and 0. 7 on the surface of adsorbed AC, respectively, and its specific surface area was 3198. 04 m2/g.
Source link: https://europepmc.org/article/MED/IND607701367
The degradation of methylene blue in the current study was investigated by electron beam irradiation mixed with graphite carbon nitride/carbon nanodots. The EBI&g-C 3 N 4/CDs method demonstrated a higher removal rate of PB from aqueous solution in comparison to EBI alone. The synergistic effect of g-C 3 N 4 / CDs and hydrogen peroxide was shown by experiments on the occurrence of hydrogen peroxide.
Source link: https://europepmc.org/article/MED/35377117
The supplies of clean water are extremely limited around the world, and climate change is already affecting the available supplies. We are herein reporting the production of activated carbon adsorbents that were made from lignocellulosic wastes. At activation temperatures of 950 °C, 800 °C, and 800 °C, respectively, the S BET of 1771, 2120, and 2490 m 2 g -1 were obtained for water vapor, K 2 CO 3 and KOH. With a adsorption capacity of 148. 8 mg g -1, sorption of methylene blue dye demonstrated the ability of the water activated carbon to remove more than 95% of the dye within 5 min. 158. 9 mg g -1 was the highest adsorption capacity of phenol ever achieved. The kinetics of adsorption of phenol were better described by pseudo-second-order reaction, when the isotherm process using Langmuir's model was described. This report outlines a roadmap for turning lignocellulosic biomass waste from landfilling to highly absorbent porous carbon adsorbents.
Source link: https://europepmc.org/article/MED/35361831
With rambutan peel and lysine, an easy and eco-friendly hydrothermal system for the preparation of nitrogen-doped carbon quantum dots was tested. Transmission electron microscopy, Fourier transform infrared spectrometry, X-ray powder diffractometer, X-ray photoelectron spectrometry, and UV spectrophotometry were used to determine N-CQDs' morphology, structure, and optical characteristics. The absolute fluorescence quantum yield is 1. 2 percent, the average particle size is 1. 63 nm, and the maximum excitation wavelength is 340 nm. Maximum emission wavelengths are 430 nm and 800 nm. Lornoxicam was used to quench the fluorescence of N-CQDs with the application of inner filter technology. The N-CQD's fluorescence ratio has a good linear correlation to the amount of LNX. LNX's linear range and detection limit are 0. 01 to 0. 003 mol/L, respectively. The detection of LNX by an effective ratiometric fluorescence probe was developed.
Source link: https://europepmc.org/article/MED/35347472
At a reduced H 2 O 2 reduction at -150 mV vs. AgCl/3 M KCl, the PB in the signaling layer served as the electrocatalyst for H 2 O 2 reduction at -150 mV vs. AgCl/3 M KCl, enabling cathodic H 2 O 2 amperometry with high target proportionality. Gelatin-zein-PB/CNT-SPCEs are an ideal instrument for electrochemical H 2 O 2 tests in human body fluids, health care products, and samples from companies that use H2 O 2 as a bleach and germicide, and are inexpensively made and cost effective target measurements. Workers with no expertise in sensor manufacture and limited funds will especially benefit from the discovery of the highly recommended H 2 O 2 probes, which as well as being used in H 2 O 2 testing and limited budget, could be used as the transducer unit of oxidase-based biosensors with amperometric H 2 O 2 readout.
Source link: https://europepmc.org/article/MED/35306807
In this research, zeolite/activated carbon@MnO 2 composite was used as a novel adsorbent to remove methylene blue and brilliant blue dyes from aqueous media. activated carbon was first extracted by Ziziphus Spina-Christi leaves and then used to synthesize zeolite/AC@MnO 2 composites and then used to synthesize zeolite/AC@MnO 2 composites, which was used to synthesize zeolite/AC@MnO 2 composites to this end. Also, at pH of 9 and 2, the optimal dye solution for the adsorption of MB and BB dyes was obtained at pH of 9 and 2, initial dye concentration of 10 mg/L, initial dye concentration of 10 g/L, and contact time of 40 and 60 min, respectively. The highest removal efficiencies of MB and BB dyes using the zeolite/AC@MnO 2 composite were 98. 43% and 96. 4 percent, respectively, under optimal conditions, indicating significant adsorption efficiencies. Moreover, the utmost adsorption capacity of MB and BB dyes was 67. 56 and 66. 22 mg/g, respectively, when measured. In addition, intraparticle and film diffusion techniques were extremely important in the adsorption process.
Source link: https://europepmc.org/article/MED/35290530
Carbon molecular sieve membranes prepared by carbonization of polymers with a large number of size-sieving ultramicropores are suitable for high-temperature gas separations. We show here that polymers can be first doped with thermolabile cross-linkers before low-temperature carbonization to preserve the polymer processability and produce excellent H 2/CO 2 separation results. PBI's synergistic PPA doping and subsequent carbonization of PBI improves H 2 permeability from 27 to 140 degrees C, superior to state-of-the-art polymeric materials and over Robeson's upper bound.
Source link: https://europepmc.org/article/MED/35263122
Synthetic azo dyes are widely used in a variety of industries, but many of them pose a danger to human health, especially when consumed in large amounts. Both D&C red 33 and Patent Blue V are commonly used in cosmetics, particularly in toothpaste and mouthwashes. As a highly reproducible electrochemical sensor for simultaneous determination of these common dyes, a novel carbon paste electrode coated with ZIF-8/g-C 3 N 4 /Co nanocomposite and 1-methyl-3-butylimidazolium bromide as an ionic liquid was used as a highly reproducible electrochemical sensor for the simultaneous determination of these common dyes. 310 – 10 -5 and 0. 9 respectively, according to the diffusion coefficient's value, and the electron transfer coefficient were calculated to be 310 10 -5 - and 0. 9 respectively. With acceptable results ranging from 96% to 97 percent, this method yielded a satisfactory result for the determination of target analyte in the real samples.
Source link: https://europepmc.org/article/MED/35271984
Remazol Brilliant Blue R has been a lethal contaminate in aquatic environments due to its widespread use and high toxicity. A cellulose-based activated carbon was synthesized at 800 °C by NaOH in this research to eliminate RBBR. During which chemical adsorption was the dominant mechanism, CAC's maximum adsorption capacity on RBBR was 653. 19 mg/g, adsorption was the most common process. The adsorption of RBBR by CAC was exothermic and spontaneous, according to Adsorption thermodynamics. In addition, the removal rates of RBBR by CAC in real water bodies, including river water and artificial lake water, were above 90. 4 percent.
Source link: https://europepmc.org/article/MED/35263647
Despite the fact that macroalgal beds are a vital component of nature-based climate solutions due to their ability to store and sequester carbon, blue carbon ecosystems are a vital component of nature-based climate solutions, but they do not often include macroalgal beds, even though they can form highly productive coastal ecosystems. Recent estimates of macroalgal contributions to global carbon sequestration are mainly from temperate kelp forests, while tropical macroalgal carbon stock in living biomass is still unclear. Magligae in Singapore account for up to 650 Mg C biomass, much more than the aboveground carbon found in seagrass meadows but lower than those in mangrove forests, according to the study. 450 Mg C ha -1 yr -1 or 0. 77 Mg C ha -1 yr -1 is the annual range of macroalgal biomass carbon's annual range. These results on macroalgal growth patterns and their significant contributions to the tropical coastal carbon pool are among the growing number of macroalgae's growing support for macroalgae in blue carbon assessments.
Source link: https://europepmc.org/article/MED/35259389
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