scholarly journals Functionalized Activated Carbon Derived from Biomass for Photocatalysis Applications Perspective

2015 ◽  
Vol 2015 ◽  
pp. 1-30 ◽  
Author(s):  
Samira Bagheri ◽  
Nurhidayatullaili Muhd Julkapli ◽  
Sharifah Bee Abd Hamid
Keyword(s):  
Activated Carbon ◽  
Activated Carbons ◽  
Synthesis Process ◽  
Carbon Microspheres ◽  
Long Term Stability ◽  
Interface Charge ◽  
Photocatalytic System ◽  
Photocatalytic Reactors ◽  
Catalytic Treatment

This review highlighted the developments of safe, effective, economic, and environmental friendly catalytic technologies to transform lignocellulosic biomass into the activated carbon (AC). In the photocatalysis applications, this AC can further be used as a support material. The limits of AC productions raised by energy assumption and product selectivity have been uplifted to develop sustainable carbon of the synthesis process, where catalytic conversion is accounted. The catalytic treatment corresponding to mild condition provided a bulk, mesoporous, and nanostructure AC materials. These characteristics of AC materials are necessary for the low energy and efficient photocatalytic system. Due to the excellent oxidizing characteristics, cheapness, and long-term stability, semiconductor materials have been used immensely in photocatalytic reactors. However, in practical, such conductors lead to problems with the separation steps and loss of photocatalytic activity. Therefore, proper attention has been given to develop supported semiconductor catalysts and certain matrixes of carbon materials such as carbon nanotubes, carbon microspheres, carbon nanofibers, carbon black, and activated carbons have been recently considered and reported. AC has been reported as a potential support in photocatalytic systems because it improves the transfer rate of the interface charge and lowers the recombination rate of holes and electrons.

Synthesis of Trilaminar Core–Shell Au/α-Fe2O3@SnO2Nanocomposites and their Application for Nonenzymatic Dopamine Electrochemical Sensing

NANO ◽  
2019 ◽  
Vol 14 (11) ◽  
pp. 1950138 ◽  
Author(s):  
Sai Zhang ◽  
Shijun Yue ◽  
Jiajia Li ◽  
Jianbin Zheng ◽  
Guojie Gao
Keyword(s):  
Electron Microscopy ◽  
High Sensitivity ◽  
Electrochemical Sensing ◽  
Synthesis Process ◽  
Core Shell ◽  
X Ray Diffraction ◽  
X Ray ◽  
Long Term Stability ◽  
Transmission Electron

Au nanoparticles anchored on core–shell [Formula: see text]-Fe2O3@SnO2 nanospindles were successfully constructed through hydrothermal synthesis process and used for fabricating a novel nonenzymatic dopamine (DA) sensor. The structure and morphology of the Au/[Formula: see text]-Fe2O3@SnO2 trilaminar nanohybrid film were characterized by scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), transmission electron microscopy (TEM) and X-ray diffraction (XRD). The electrochemical properties of the sensor were investigated by cyclic voltammetry and amperometry. The experimental results suggest that the composites have excellent catalytic property toward DA with a wide linear range from 0.5[Formula: see text][Formula: see text]M to 0.47[Formula: see text]mM, a low detection limit of 0.17[Formula: see text][Formula: see text]M (S/[Formula: see text]) and high sensitivity of 397.1[Formula: see text][Formula: see text]A[Formula: see text]mM[Formula: see text][Formula: see text]cm[Formula: see text]. In addition, the sensor exhibits long-term stability, good reproducibility and anti-interference.

scholarly journals Long-term stability and efficacy of historic activated carbon (AC) deployments at diverse freshwater and marine remediation sites

2020 ◽  
Author(s):  
Todd Bridges ◽  
Sandra Newell ◽  
Alan Kennedy ◽  
David Moore ◽  
Upal Ghosh ◽  
...  
Keyword(s):  
New York ◽  
Activated Carbon ◽  
Research Effort ◽  
Field Performance ◽  
The United States ◽  
Pilot Scale ◽  
Long Term Stability ◽  
Core Samples ◽  
Physical Environments

A number of sites around the United States have used activated carbon (AC) amendments to remedy contaminated sediments. Variation in site-specific characteristics likely influences the long-term fate and efficacy of AC treatment. The long-term effectiveness of an AC amendment to sediment is largely unknown, as the field performance has not been monitored for more than three years. As a consequence, the focus of this research effort was to evaluate AC’s long-term (6–10 yr) performance. These assessments were performed at two pilot-scale demonstration sites, Grasse River, Massena, New York and Canal Creek, Aberdeen Proving Ground (APG), Aberdeen, Maryland, representing two distinct physical environments. Sediment core samples were collected after 6 and 10 years of remedy implementation at APG and Grasse River, respectively. Core samples were collected and sectioned to determine the current vertical distribution and persistence of AC in the field. The concentration profile of polychlorinated biphenyls (PCBs) in sediment pore water with depth was measured using passive sampling. Sediment samples from the untreated and AC-treated zones were also assessed for bioaccumulation in benthic organisms. The data collected enabled comparison of AC distribution, PCB concentrations, and bioaccumulation measured over the short- and long-term (months to years).

Biomass-Derived Activated Carbon

2017 ◽  
pp. 162-199 ◽  
Author(s):  
Samira Bagheri ◽  
Nurhidayatullaili Muhd Julkapli
Keyword(s):  
Activated Carbon ◽  
Lignocellulosic Biomass ◽  
Mild Condition ◽  
Carbon Materials ◽  
Semiconductor Materials ◽  
Synthesis Process ◽  
Product Selectivity ◽  
Heterogeneous Catalytic ◽  
Carbon Production ◽  
Photocatalytic System

The focus is to highlight the catalytic technologies to convert lignocellulosic biomass into the activated carbon (AC) which can be used in photocatalysis applications. The drawback of carbon production raised by energy assumption and product selectivity has encouraged the development of sustainable carbon synthesis process, where the catalytic approach is considered. This treatment via either homogenous or heterogeneous catalytic approach relative in mild condition provided a bulk, mesoporous and nanostructure AC materials. Those characteristics of AC materials are basic requirements for the efficient photocatalytic system. Due to the excellent oxidizing behavior and stability, semiconductor materials have been widely used in the photocatalytic system. However, they lead to some drawbacks in terms of the separation steps and loss of the photocatalyst. So, attention has been paid to supported semiconductor catalysts which carbon materials were explored. AC reported as a potential support in photocatalytic systems.

Improved performance and long-term stability of activated carbon doped with nitrogen for capacitive deionization

Desalination ◽  
2020 ◽  
Vol 481 ◽  
pp. 114362 ◽  
Author(s):  
Chun-Chia Hsu ◽  
Yi-Heng Tu ◽  
Yu-Hsiang Yang ◽  
Jeng-An Wang ◽  
Chi-Chang Hu
Keyword(s):  
Activated Carbon ◽  
Capacitive Deionization ◽  
Carbon Doped ◽  
Term Stability ◽  
Long Term Stability ◽  
Improved Performance

scholarly journals Application of Brown Coal and Activated Carbon for the Immobilization of Metal Forms in Soil, along with Their Verification Using Generalized Linear Models (GLMs)

Minerals ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 268
Author(s):  
Agnieszka Pusz ◽  
Magdalena Wiśniewska ◽  
Dominik Rogalski
Keyword(s):  
Activated Carbon ◽  
Brown Coal ◽  
Generalized Linear Models ◽  
Metal Content ◽  
Linear Models ◽  
Activated Carbons ◽  
Pot Experiment ◽  
Stabilization Method ◽  
Humic Fractions

Various factors can lead to the transformation of metal forms and to an increase in their solubility and, consequently, their mobility. One solution to the problem of increased solubility is the use of carbons as additives to soil in order to limit the potential migration of contaminants. The aim of this study was to determine the effect of using brown coal and activated carbon on metal forms that are available to plants. The mineral composition of the coals used in a pot experiment was analyzed. Observations were carried out with a JJSM-6380 LA scanning electron microscope (SEM) connected to an EDS electron micro-probe. The total contents of Zn, Cd, Pb and Cu in the assessed soils as well as the content of available metal forms were determined after single extractions with different reagents, namely 1 M NH4NO3, DTPA and 1 M HCl. Generalized linear models (GLMs) were used to evaluate the effectiveness of the stabilization methods in a long-term pot experiment. The carbons reduced the percentage of these forms relative to the total metal content in the soil. After adding brown coal, Zn, Cd, Pb and Cu forms were reduced by up to 32%, 30%, 33% and 43%, respectively. After adding activated carbon, the metal forms of Zn, Cd, Pb and Cu were reduced by up to 47%, 44%, 40% and 50%, respectively. The following order of extracted metal forms with different solutions was found: HCl: Zn > Pb > Cu > Cd; DTPA: Pb > Zn > Cu > Cd; NH4NO3: Zn > Cu > Pb > Cd. Eight years after setting up the pot experiment, the contents of humic substances in soils with the addition of both tested carbons were compared, and the soils with added carbons were found to have a stable content of humic fractions. The costs of remediation through the stabilization method using the tested brown coal and activated carbons do not exceed USD 75/t (taking into account the double doses of both carbons).

Stability and Change in Emotional Intelligence: Exploring the Transition to Young Adulthood

2005 ◽  
Vol 26 (2) ◽  
pp. 100-106 ◽  
Author(s):  
James D.A. Parker ◽  
Donald H. Saklofske ◽  
Laura M. Wood ◽  
Jennifer M. Eastabrook ◽  
Robyn N. Taylor
Keyword(s):  
High School ◽  
Emotional Intelligence ◽  
Postsecondary Education ◽  
Life Transition ◽  
Full Time ◽  
Major Life ◽  
Long Term Stability ◽  
Time Period ◽  
Transition From High School

Abstract. The concept of emotional intelligence (EI) has attracted growing interest from researchers working in various fields. The present study examined the long-term stability (32 months) of EI-related abilities over the course of a major life transition (the transition from high school to university). During the first week of full-time study, a large group of undergraduates completed the EQ-i:Short; 32 months later a random subset of these students (N = 238), who had started their postsecondary education within 24 months of graduating from high school, completed the measures for a second time. The study found EI scores to be relatively stable over the 32-month time period. EI scores were also found to be significantly higher at Time 2; the overall pattern of change in EI-levels was more than can be attributed to the increased age of the participants.

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