scholarly journals Metal-Based Nanocomposite Materials for Efficient Photocatalytic Degradation of Phenanthrene from Aqueous Solutions

Polymers ◽  
2021 ◽  
Vol 13 (14) ◽  
pp. 2374
Author(s):  
Husn Ara Chauhan ◽  
Mohd. Rafatullah ◽  
Khozema Ahmed Ali ◽  
Masoom Raza Siddiqui ◽  
Moonis Ali Khan ◽  
...  
Keyword(s):  
Aqueous Solutions ◽  
Photocatalytic Degradation ◽  
High Performance ◽  
Fossil Fuels ◽  
Low Cost ◽  
Nanocomposite Materials ◽  
Phenanthrene Degradation ◽  
Naturally Occurring ◽  
Polycyclic Aromatic ◽  
Day By Day

Polycyclic aromatic hydrocarbons (PAHs) are a class of naturally occurring chemicals resulting from the insufficient combustion of fossil fuels. Among the PAHs, phenanthrene is one of the most studied compounds in the marine ecosystems. The damaging effects of phenanthrene on the environment are increasing day by day globally. To lessen its effect on the environment, it is essential to remove phenanthrene from the water resources in particular and the environment in general through advanced treatment methods such as photocatalytic degradation with high-performance characteristics and low cost. Therefore, the combination of metals or amalgamation of bimetallic oxides as an efficient photocatalyst demonstrated its propitiousness for the degradation of phenanthrene from aqueous solutions. Here, we reviewed the different nanocomposite materials as a photocatalyst, the mechanism and reactions to the treatment of phenanthrene, as well as the influence of other variables on the rate of phenanthrene degradation.

Multiscale microstructure engineering and the development of high performance, environmental friendly, low cost and thermally stable half-Heusler thermoelectric materials

Impact ◽  
2020 ◽  
Vol 2020 (1) ◽  
pp. 65-67
Author(s):  
Yaw Wang Chai ◽  
Yoshisato Kimura
Keyword(s):  
Global Warming ◽  
High Performance ◽  
Fossil Fuels ◽  
Low Cost ◽  
Electrical Equipment ◽  
Associate Professor ◽  
Maximum Efficiency ◽  
Weather Patterns ◽  
Institute Of Technology ◽  
Save Energy

A major challenge of the 21st century is the management of our planetary environment. It's a highly complex issue that permeates every level of our society and our ecosystem. There are multiple outstanding problems that need addressing. Continued use of fossil fuels and the release of global warming gases is leading to global warming and global shifts in weather patterns. Consumption of single use products is causing the twin issues of wasting resources whilst creating massive waste disposal problems. By products from all of these processes pollute the environment with toxic and persistent waste. If these problems are to be solved, a shift in how our global society operates is necessary. Reuse, recycling and achieving maximum efficiency in all processes is vital. Whilst this will necessarily include obvious sources of waste such as plastics, batteries and electrical equipment, it also necessitates the reuse of overlooked waste such as the heat produced in many mechanical and industrial processes. Heat is particularly neglected as a wasted source of energy. Millions of processes, such as chemical manufacture, car engines and electrical equipment, produce heat as part of their normal processing. Typically, this heat is allowed to dissipate into the environment and is often actively removed for the efficient and safe management of the process. However, if even a tiny portion of this heat could be captured and turned into a usable form of energy, we could power all sorts of processes. This would save energy and therefore resources that would otherwise be used for power. Professor Yoshisato Kimura and Associate Professor Yaw Wang Chai of the Tokyo Institute of Technology, Japan are material engineers looking to harness thermoelectric (TE) materials to convert heat into electricity. Specifically, they are interested in TE materials that are capable of remaining stable and generating electricity at high temperatures.

scholarly journals Adsorption of phenanthrene by stevensite and sepiolite

Clay Minerals ◽  
2017 ◽  
Vol 52 (3) ◽  
pp. 341-350 ◽  
Author(s):  
D.E. González-Santamaría ◽  
E. López ◽  
A. Ruiz ◽  
R. Fernández ◽  
A. Ortega ◽  
...  
Keyword(s):  
Fossil Fuels ◽  
Linear Models ◽  
Low Cost ◽  
Adsorption Mechanisms ◽  
Oil Spillage ◽  
Polycyclic Aromatic ◽  
Batch Testing ◽  
Equilibrium Concentrations ◽  
Minimal Environmental Impact ◽  
Low Solubility

AbstractPolycyclic aromatic hydrocarbons are increasingly widespread pollutants introduced into the environment via oil spillage and incomplete anthropogenic combustion of fossil fuels. In this work, the capacity of stevensite and sepiolite to adsorb phenanthrene (PHE) has been evaluated experimentally by batch testing. Both clay minerals are distributed widely in the Madrid Basin, are of low cost and can be applied with minimal environmental impact. In the context of few previous studies, adsorption isotherms have been developed to understand the adsorption mechanisms and were fitted to the Freundlich and linear models with virtually the same results. Although stevensite showed greater adsorption capacity than sepiolite, the isotherms were constructed for equilibrium concentrations up to 0.8–1.0 mg/L due to the low solubility of PHE in water. When compared to other adsorbents the ability of stevensite to retain PAHs should be examined further in order to add and complement novel functions in reactive barriers.

scholarly journals Coronene: A High-Voltage Anion De-insertion Cathode for Potassium-Ion Battery

2020 ◽  
Author(s):  
Minami Kato ◽  
Titus Masese ◽  
Kazuki Yoshii
Keyword(s):  
High Voltage ◽  
Aromatic Hydrocarbons ◽  
Cathode Materials ◽  
High Performance ◽  
Storage Systems ◽  
Broad Class ◽  
Low Cost ◽  
Potassium Ion ◽  
Energy Devices ◽  
Polycyclic Aromatic

<b>Potassium-ion batteries have been envisioned to herald the age of low-cost and high-performance energy storage systems. However, the sparsity of viable components has dampened the progress of these energy devices. Thus, herein, we report coronene, a high-voltage cathode material that manifests a high-voltage of 4.1 V enkindled by anion (de)insertion. This work not only illuminates the broad class of polycyclic aromatic hydrocarbons as prospective cathode materials but also sets a new benchmark for the performance of future organic cathode materials.</b>

scholarly journals Recent Developments in Supercapacitor Electrodes: A Mini Review

2022 ◽  
Vol 6 (1) ◽  
pp. 5
Author(s):  
Sumedha Harike Nagarajarao ◽  
Apurva Nandagudi ◽  
Ramarao Viswanatha ◽  
Basavanakote Mahadevappa Basavaraja ◽  
Mysore Sridhar Santosh ◽  
...  
Keyword(s):  
High Performance ◽  
Fossil Fuels ◽  
Electrode Materials ◽  
Human Life ◽  
Low Cost ◽  
Discharge Process ◽  
Storage Solutions ◽  
Recent Developments ◽  
Lower Energy Density ◽  
Renewable Energy Storage

The use of nonrenewable fossil fuels for energy has increased in recent decades, posing a serious threat to human life. As a result, it is critical to build environmentally friendly and low-cost reliable and renewable energy storage solutions. The supercapacitor is a future energy device because of its higher power density and outstanding cyclic stability with a quick charge and discharge process. Supercapacitors, on the other hand, have a lower energy density than regular batteries. It is well known that the electrochemical characteristic of supercapacitors is strongly dependent on electrode materials. The current review highlights advance in the TMOs for supercapacitor electrodes. In addition, the newly discovered hybrid/pseudo-supercapacitors have been discussed. Metal oxides that are employed as electrode materials are the focus of this study. The discovery of nanostructured electrode materials continues to be a major focus of supercapacitor research. To create high-performance electrode materials from a morphological standpoint, various efforts have been attempted. Lastly, we analyze the supercapacitor’s evolving trend and our perspective for the future generations of supercapacitors.

Rapid recovery of phytic acid from rice brans using chitosan nanofiber-based porous hydrogels

2021 ◽  
Vol 85 (3) ◽  
pp. 481-487
Author(s):  
Sachiko Nitta ◽  
Hiroyuki Iwamoto
Keyword(s):  
Phytic Acid ◽  
High Performance ◽  
Low Cost ◽  
Renal Calculi ◽  
Low Ph ◽  
High Yield ◽  
Naturally Occurring ◽  
Porous Chitosan ◽  
Chitosan Nanofiber ◽  
New Type

ABSTRACT Phytic acid (PA) is a new type of naturally occurring pharmaceutical for afflictions such as cancer, diabetes, and renal calculi. The efficient, low-cost extraction of PA from biowaste is much sought after. Herein, highly pure PA was obtained from rice bran by adsorption at low pH onto porous chitosan nanofiber hydrogels. Due to the large surface area of the chitosan nanofiber-based porous hydrogels, the adsorption equilibrated within 60 min. Adsorption of PA was influenced by the buffer pH, temperature, and the ratio of chitosan in the hydrogel. PA was recovered by soaking the hydrogel in alkaline solution. After concentrating the solution and washing the residue with ethanol, highly pure sodium phytate was obtained with 32.2%-38.7% yield, as confirmed by Fourier transform infrared and high-performance liquid chromatography. To our knowledge, this is the first report on the recovery of pure PA in high yield without using toxic solvents.

scholarly journals High-performance 3D printing of hydrogels by water-dispersible photoinitiator nanoparticles

2016 ◽  
Vol 2 (4) ◽  
pp. e1501381 ◽  
Author(s):  
Amol A. Pawar ◽  
Gabriel Saada ◽  
Ido Cooperstein ◽  
Liraz Larush ◽  
Joshua A. Jackman ◽  
...  
Keyword(s):  
3D Printing ◽  
Aqueous Solutions ◽  
High Performance ◽  
Light Emitting Diode ◽  
Low Cost ◽  
Water Soluble ◽  
Visible Range ◽  
Digital Light Processing ◽  
Uv Curable ◽  
Water Dispersible

In the absence of water-soluble photoinitiators with high absorbance in the ultraviolet (UV)–visible range, rapid three-dimensional (3D) printing of hydrogels for tissue engineering is challenging. A new approach enabling rapid 3D printing of hydrogels in aqueous solutions is presented on the basis of UV-curable inks containing nanoparticles of highly efficient but water-insoluble photoinitiators. The extinction coefficient of the new water-dispersible nanoparticles of 2,4,6-trimethylbenzoyl-diphenylphosphine oxide (TPO) is more than 300 times larger than the best and most used commercially available water-soluble photoinitiator. The TPO nanoparticles absorb significantly in the range from 385 to 420 nm, making them suitable for use in commercially available, low-cost, light-emitting diode–based 3D printers using digital light processing. The polymerization rate at this range is very fast and enables 3D printing that otherwise is impossible to perform without adding solvents. The TPO nanoparticles were prepared by rapid conversion of volatile microemulsions into water-dispersible powder, a process that can be used for a variety of photoinitiators. Such water-dispersible photoinitiator nanoparticles open many opportunities to enable rapid 3D printing of structures prepared in aqueous solutions while bringing environmental advantages by using low-energy curing systems and avoiding the need for solvents.

scholarly journals Coronene: A High-Voltage Anion De-insertion Cathode for Potassium-Ion Battery

2020 ◽  
Author(s):  
Minami Kato ◽  
Titus Masese ◽  
Kazuki Yoshii
Keyword(s):  
High Voltage ◽  
Aromatic Hydrocarbons ◽  
Cathode Materials ◽  
High Performance ◽  
Broad Class ◽  
Low Cost ◽  
Potassium Ion ◽  
Energy Devices ◽  
Polycyclic Aromatic ◽  
Silver Lining

<b>Potassium-ion batteries have been envisioned to herald the age of low-cost and high-performance energy storage systems. However, the sparsity of viable components has dampened the progress of these energy devices. Thus, herein, we report coronene (not to be confused with ‘corona’), a high-voltage cathode material that manifests a high-voltage of 4.1 V enkindled by anion (de)insertion. This work not only illuminates the broad class of polycyclic aromatic hydrocarbons as prospective cathode materials but also sets a new benchmark for the performance of future organic cathode materials. It would be remiss not to mention that the timing of this submission is not related to the ongoing COVID-19 pandemic and any similarities noted herein are coincidental. On the other hand, as a silver lining, this work epitomises a beacon of hope in these despairing times.</b>

scholarly journals Application of Electro-Fenton Technology to Remediation of Polluted Effluents by Self-Sustaining Process

2014 ◽  
Vol 2014 ◽  
pp. 1-8 ◽  
Author(s):  
Maria Ángeles Fernández de Dios ◽  
Olaia Iglesias ◽  
Marta Pazos ◽  
Maria Ángeles Sanromán
Keyword(s):  
Organic Pollutants ◽  
Microbial Fuel Cells ◽  
Advanced Oxidation Process ◽  
Low Cost ◽  
Integrated System ◽  
Reactive Black 5 ◽  
Treatment Efficiency ◽  
Phenanthrene Degradation ◽  
Polycyclic Aromatic ◽  
High Treatment

The applicability of electro-Fenton technology to remediation of wastewater contaminated by several organic pollutants such as dyes and polycyclic aromatic hydrocarbons has been evaluated using iron-enriched zeolite as heterogeneous catalyst. The electro-Fenton technology is an advanced oxidation process that is efficient for the degradation of organic pollutants, but it suffers from the high operating costs due to the need for power investment. For this reason, in this study microbial fuel cells (MFCs) were designed in order to supply electricity to electro-Fenton processes and to achieve high treatment efficiency at low cost. Initially, the effect of key parameters on the MFC power generation was evaluated. Afterwards, the degradation of Reactive Black 5 dye and phenanthrene was evaluated in an electro-Fenton reactor, containing iron-enriched zeolite as catalyst, using the electricity supplied by the MFC. Near complete dye decolourization and 78% of phenanthrene degradation were reached after 90 min and 30 h, respectively. Furthermore, preliminary reusability tests of the developed catalyst showed high degradation levels for successive cycles. The results permit concluding that the integrated system is adequate to achieve high treatment efficiency with low electrical consumption.

scholarly journals Coronene: A High-Voltage Anion De-insertion Cathode for Potassium-Ion Battery

2020 ◽  
Author(s):  
Minami Kato ◽  
Titus Masese ◽  
Kazuki Yoshii
Keyword(s):  
High Voltage ◽  
Aromatic Hydrocarbons ◽  
Cathode Materials ◽  
High Performance ◽  
Storage Systems ◽  
Broad Class ◽  
Low Cost ◽  
Potassium Ion ◽  
Energy Devices ◽  
Polycyclic Aromatic

<b>Potassium-ion batteries have been envisioned to herald the age of low-cost and high-performance energy storage systems. However, the sparsity of viable components has dampened the progress of these energy devices. Thus, herein, we report coronene, a high-voltage cathode material that manifests a high-voltage of 4.1 V enkindled by anion (de)insertion. This work not only illuminates the broad class of polycyclic aromatic hydrocarbons as prospective cathode materials but also sets a new benchmark for the performance of future organic cathode materials.</b>

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