scholarly journals A Systematic Review of Metal Oxide Applications for Energy and Environmental Sustainability

Metals ◽  
2020 ◽  
Vol 10 (12) ◽  
pp. 1604
Author(s):  
Mir Sayed Shah Danish ◽  
Arnab Bhattacharya ◽  
Diana Stepanova ◽  
Alexey Mikhaylov ◽  
Maria Luisa Grilli ◽  
...  
Keyword(s):  
Metal Oxide ◽  
Environmental Sustainability ◽  
Environmental Remediation ◽  
Large Scale ◽  
Structural Features ◽  
Thermal Reactions ◽  
Footprint Analysis ◽  
Storage Methods ◽  
Photocatalytic Applications ◽  
Fundamental Requirement

Energy is the fundamental requirement of all physical, chemical, and biological processes which are utilized for better living standards. The toll that the process of development takes on the environment and economic activity is evident from the arising concerns about sustaining the industrialization that has happened in the last centuries. The increase in carbon footprint and the large-scale pollution caused by industrialization has led researchers to think of new ways to sustain the developmental activities, whilst simultaneously minimizing the harming effects on the enviroment. Therefore, decarbonization strategies have become an important factor in industrial expansion, along with the invention of new catalytic methods for carrying out non-thermal reactions, energy storage methods and environmental remediation through the removal or breakdown of harmful chemicals released during manufacturing processes. The present article discusses the structural features and photocatalytic applications of a variety of metal oxide-based materials. Moreover, the practical applicability of these materials is also discussed, as well as the transition of production to an industrial scale. Consequently, this study deals with a concise framework to link metal oxide application options within energy, environmental and economic sustainability, exploring the footprint analysis as well.

Recent developments of metal oxide based heterostructures for photocatalytic applications towards environmental remediation

2018 ◽  
Vol 267 ◽  
pp. 35-52 ◽  
Author(s):  
J. Theerthagiri ◽  
Sivaraman Chandrasekaran ◽  
Sunitha Salla ◽  
V. Elakkiya ◽  
R.A. Senthil ◽  
...  
Keyword(s):  
Metal Oxide ◽  
Environmental Remediation ◽  
Recent Developments ◽  
Photocatalytic Applications

Graphitic carbon nitride based new advanced materials for photocatalytic applications

2019 ◽  
Vol 16 ◽  
Author(s):  
Pankaj Raizada ◽  
Abhinandan Kumar ◽  
Pardeep Singh
Keyword(s):  
Environmental Remediation ◽  
Large Scale ◽  
Carbon Nitride ◽  
Graphitic Carbon ◽  
Graphitic Carbon Nitride ◽  
Pollutant Degradation ◽  
Visible Absorption ◽  
Metal Free ◽  
Photocatalytic Applications ◽  
Semiconductor Photocatalyst

Background: The Present Scenario Of Rapid Industrial And Population Growth Has Become A Serious Threat To Environmental And Energy Concerns. Extremely Noxious Pollutants Like Dyes, Heavy Metal Ions, Phenols, Antibiotics And Pesticides In Water Are The Reason Behind Deprived Water Quality Leading To Inadequate Access To Clean Water. Photocatalysis Is A Prominent Strategy For Environmental Remediation As Photocatalytic Materials Not Only Convert Solar Energy Into Usable Energy Expedient But Also Shows Potential Application In Pollutant Mitigation. An Effectual Photocatalytic System Must Possess Wide Visible Absorption Range, High Physio-Chemical Firmness, And Effective Space-Charge Separation Along With Strong Redox Ability. Polymeric Graphitic Carbon Nitride A Metal-Free Semiconductor Photocatalyst Has Outshined As A Robust Photocatalyst For Various Photocatalytic Applications. Method: Hybridizing Polymeric G-C3n4 With Other Semiconductor Photocatalysts Has Not Only Conquer The Limitations Related To Pristine G-C3n4 But Also Displayed Improved Photoactivity. Different Photocatalytic Systems Involving G-C3n4 Coupled Metal-Oxides, Metal-Free Systems And Complex Heterojunction Systems Are Reviewed. Moreover, An All-Embracing Study Based On G-C3n4 Based Nanocatalysts Is Explored Via Heterojunction Formation Taking G-C3n4 As One Component. Results: Photocatalytic Experiments Involving Photodegradation Of Pollutants, Revealed The Significance Of Metal-Free G-C3n4 In The Heterojunction System Which Remarkably Boost The Photoactivity Through Effective Separation And Migration Of Photocarriers. Moreover, From Recyclability Experiments, Exceptional Photostability Of G-C3n4 Based Photocatalysts Was Observed. Photocatalytic Pollutant Degradation Is A Complex Phenomenon Which Requires Significant Experimental Techniques To Support The Mechanism. With The Help Of Photoelectrochemical Analysis, The Mechanisms Behind Photodegradation Can Be Evaluated And Explored. Conclusion: Metal-Free Polymeric G-C3n4 Is A Potential Semiconductor Photocatalyst Which Can Be Optimally Utilized For Wastewater Treatment. Coupling G-C3n4 With Another Semiconductor Material With An Appropriate Band Edge Can Effectively Enhance The Photocatalytic Efficacy. Herein, G-C3n4 Derived Metal-Oxide, Metal-Free And Complex Heterojunction Systems Are Explored And Their Photocatalytic Efficiency Is Evaluated For Pollutant Degradation. However, More Effective Research Efforts Are Needed For Large-Scale Applications Of G-C3n4 Based Photocatalysts.

Accelerated Discovery of High-Refractive-Index Polyimides via First-Principles Molecular Modeling, Virtual High-Throughput Screening, and Data Mining

2019 ◽  
Author(s):  
Mohammad Atif Faiz Afzal ◽  
Mojtaba Haghighatlari ◽  
Sai Prasad Ganesh ◽  
Chong Cheng ◽  
Johannes Hachmann
Keyword(s):  
Data Mining ◽  
Refractive Index ◽  
High Throughput ◽  
First Principles ◽  
High Throughput Screening ◽  
Large Scale ◽  
Computational Study ◽  
High Refractive Index ◽  
Structural Features ◽  
Learning Program

<div>We present a high-throughput computational study to identify novel polyimides (PIs) with exceptional refractive index (RI) values for use as optic or optoelectronic materials. Our study utilizes an RI prediction protocol based on a combination of first-principles and data modeling developed in previous work, which we employ on a large-scale PI candidate library generated with the ChemLG code. We deploy the virtual screening software ChemHTPS to automate the assessment of this extensive pool of PI structures in order to determine the performance potential of each candidate. This rapid and efficient approach yields a number of highly promising leads compounds. Using the data mining and machine learning program package ChemML, we analyze the top candidates with respect to prevalent structural features and feature combinations that distinguish them from less promising ones. In particular, we explore the utility of various strategies that introduce highly polarizable moieties into the PI backbone to increase its RI yield. The derived insights provide a foundation for rational and targeted design that goes beyond traditional trial-and-error searches.</div>

scholarly journals Oxide-based catalysis: tailoring surface structures via organic ligands and related interfacial charge carrier for environmental remediation

RSC Advances ◽  
2021 ◽  
Vol 11 (31) ◽  
pp. 19059-19069
Author(s):  
S. Harish ◽  
S. Athithya ◽  
V. Shivani ◽  
S. Ponnusamy ◽  
M. Shimomura ◽  
...  
Keyword(s):  
Charge Carrier ◽  
Structure Formation ◽  
Environmental Remediation ◽  
Organic Ligands ◽  
Surface Structures ◽  
Hierarchical Nanostructures ◽  
Amine Ligands ◽  
Interfacial Charge ◽  
Photocatalytic Applications

Hierarchical nanostructures of ZnO/CuO and the effects of amine ligands on their structure, formation and photocatalytic applications were investigated.

scholarly journals A Microcosm Treatability Study for Evaluating Wood Mulch-Based Amendments as Electron Donors for Trichloroethene (TCE) Reductive Dechlorination

Water ◽  
2021 ◽  
Vol 13 (14) ◽  
pp. 1949
Author(s):  
Edoardo Masut ◽  
Alessandro Battaglia ◽  
Luca Ferioli ◽  
Anna Legnani ◽  
Carolina Cruz Viggi ◽  
...  
Keyword(s):  
Electron Donor ◽  
Environmental Sustainability ◽  
Reductive Dechlorination ◽  
Environmental Remediation ◽  
Low Cost ◽  
Chlorinated Solvents ◽  
Electron Donors ◽  
Chlorinated Ethenes ◽  
Dehalococcoides Mccartyi ◽  
Wood Mulch

In this study, wood mulch-based amendments were tested in a bench-scale microcosm experiment in order to assess the treatability of saturated soils and groundwater from an industrial site contaminated by chlorinated ethenes. Wood mulch was tested alone as the only electron donor in order to assess its potential for stimulating the biological reductive dechlorination. It was also tested in combination with millimetric iron filings in order to assess the ability of the additive to accelerate/improve the bioremediation process. The efficacy of the selected amendments was compared with that of unamended control microcosms. The results demonstrated that wood mulch is an effective natural and low-cost electron donor to stimulate the complete reductive dechlorination of chlorinated solvents to ethene. Being a side-product of the wood industry, mulch can be used in environmental remediation, an approach which perfectly fits the principles of circular economy and addresses the compelling needs of a sustainable and low environmental impact remediation. The efficacy of mulch was further improved by the co-presence of iron filings, which accelerated the conversion of vinyl chloride into the ethene by increasing the H2 availability rather than by catalyzing the direct abiotic dechlorination of contaminants. Chemical analyses were corroborated by biomolecular assays, which confirmed the stimulatory effect of the selected amendments on the abundance of Dehalococcoides mccartyi and related reductive dehalogenase genes. Overall, this paper further highlights the application potential and environmental sustainability of wood mulch-based amendments as low-cost electron donors for the biological treatment of chlorinated ethenes.

scholarly journals An integrated life cycle and water footprint assessment of nonfood crops based bioenergy production

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Jun Li ◽  
Fengyin Xiong ◽  
Zhuo Chen
Keyword(s):  
Life Cycle ◽  
Environmental Sustainability ◽  
Large Scale ◽  
Water Footprint ◽  
Arable Land ◽  
Integrated Analysis ◽  
Actual Performance ◽  
Bioenergy Production ◽  
Trade Offs ◽  
Hybrid Pennisetum

AbstractBiomass gasification, especially distribution to power generation, is considered as a promising way to tackle global energy and environmental challenges. However, previous researches on integrated analysis of the greenhouse gases (GHG) abatement potentials associated with biomass electrification are sparse and few have taken the freshwater utilization into account within a coherent framework, though both energy and water scarcity are lying in the central concerns in China’s environmental policy. This study employs a Life cycle assessment (LCA) model to analyse the actual performance combined with water footprint (WF) assessment methods. The inextricable trade-offs between three representative energy-producing technologies are explored based on three categories of non-food crops (maize, sorghum and hybrid pennisetum) cultivated in marginal arable land. WF results demonstrate that the Hybrid pennisetum system has the largest impact on the water resources whereas the other two technology options exhibit the characteristics of environmental sustainability. The large variances in contribution ratio between the four sub-processes in terms of total impacts are reflected by the LCA results. The Anaerobic Digestion process is found to be the main contributor whereas the Digestate management process is shown to be able to effectively mitigate the negative environmental impacts with an absolute share. Sensitivity analysis is implemented to detect the impacts of loss ratios variation, as silage mass and methane, on final results. The methane loss has the largest influence on the Hybrid pennisetum system, followed by the Maize system. Above all, the Sorghum system demonstrates the best performance amongst the considered assessment categories. Our study builds a pilot reference for further driving large-scale project of bioenergy production and conversion. The synergy of combined WF-LCA method allows us to conduct a comprehensive assessment and to provide insights into environmental and resource management.

scholarly journals A Novel and Efficient Metal Oxide Fluoride Absorbent for Drinking Water Safety and Sustainable Development

2021 ◽  
Vol 13 (2) ◽  
pp. 883
Author(s):  
Changjuan Dong ◽  
Xiaomei Wu ◽  
Zhanyi Gao ◽  
Peiling Yang ◽  
Mohd Yawar Ali Khan
Keyword(s):  
Sustainable Development ◽  
Drinking Water ◽  
Metal Oxide ◽  
Environmental Sustainability ◽  
Environmentally Friendly ◽  
Langmuir Model ◽  
Maximum Adsorption Capacity ◽  
Low Carbon ◽  
Water Safety ◽  
Solution Ph

Inefficient and non-environmentally friendly absorbent production can lead to much resource waste and go against low carbon and sustainable development. A novel and efficient Mg-Fe-Ce (MFC) complex metal oxide absorbent of fluoride ion (F−) removal was proposed for safe, environmentally friendly, and sustainable drinking water management. A series of optimization and preparation processes for the adsorbent and batch experiments (e.g., effects of solution pH, adsorption kinetics, adsorption isotherms, effects of coexisting anions, as well as surface properties tests) were carried out to analyze the characteristics of the adsorbent. The results indicated that optimum removal of F− occurred in a pH range of 4–5.5, and higher adsorption performances also happened under neutral pH conditions. The kinetic data under 10 and 50 mg·g−1 were found to be suitable for the pseudo-second-order adsorption rate model, and the two-site Langmuir model was ideal for adsorption isotherm data as compared to the one-site Langmuir model. According to the two-site Langmuir model, the maximum adsorption capacity calculated at pH 7.0 ± 0.2 was 204 mg·g−1. The adsorption of F− was not affected by the presence of sulfate (SO42−), nitrate (NO3−), and chloride (Cl−), which was suitable for practical applications in drinking water with high F− concentration. The MFC adsorbent has an amorphous structure, and there was an exchange reaction between OH− and F−. The novel MFC adsorbent was proven to have higher efficiency, better economy, and environmental sustainability, and be more environmentally friendly.

Multifunctional Ni-Mg-Bimetal-Activated Zn(O,S) for Hydrogen Generation and Environmental Remediation with Simulated Solar-Light Irradiation

2021 ◽  
Author(s):  
Hairus Abdullah ◽  
Hardy Shuwanto ◽  
Dong-Hau Kuo
Keyword(s):  
Hydrogen Production ◽  
Hexavalent Chromium ◽  
Chemical Transformation ◽  
Environmental Remediation ◽  
Hydrogen Generation ◽  
Hydrogenation Reaction ◽  
Light Irradiation ◽  
Simulated Solar Light ◽  
Solar Light Irradiation ◽  
Photocatalytic Applications

Ni-Mg-Bimetal doped Zn(O,S) has been synthesized, characterized, and tested for several photocatalytic applications such as hydrogen production, hydrogenation reaction for chemical transformation, detoxification of hexavalent chromium, and mixed dye (MB...

Directions of Economic and Ecological Transformation of Enterprises of the Defence-industrial Complex of Ukraine

2021 ◽  
pp. 211-219
Author(s):  
Oleksii Hutsaliuk ◽  
◽  
Tatiana Obniavko ◽  
Keyword(s):  
Environmental Sustainability ◽  
Large Scale ◽  
Economic Effects ◽  
High Tech ◽  
Industrial Complex ◽  
Military Equipment ◽  
Managerial Decisions ◽  
Current Period ◽  
Cumulative Deterioration ◽  
High Level

Since the beginning of the third millennium, ecological safety has become of paramount importance for Ukraine. The cumulative deterioration of the environment, fixed by the annual official reports on the ecological situation in the country, is fraught with irreparable consequences not only for the present generations, but also for descendants. The authors propose to consider the enterprises of the defence-industrial complex (DIC) of Ukraine as those that make a significant contribution to the development of the economy of the country, while not only not destroying the environment, but also contributing to sustainable development. The defence-industrial complex of Ukraine is the basis of the high-tech sector of the Ukrainian economy, which determines its key importance for the functioning and development of the entire national economy, in the current period of change of technological modes, as the enterprises of the Ukrainian defence-industrial complex have a high level of innovation. One of the key features of the domestic defence-industrial complex is that it has the potential to concentrate various types of resources to achieve breakthrough results not only in addressing the issues of creating the latest weapons and military equipment, but also for implementing large-scale projects of national economic importance. This potential for breakthrough development currently remains underutilized, requiring adjustments not only in industrial, but also in state economic policy as a whole. The current state of development of defence industry enterprises is characterized by insufficient economic and environmental sustainability and requires modernization based on global experience in the greening of the military-defence sphere and NATO environmental standards, which will have environmental and economic effects. The obstacles of economic and ecological transformation of enterprises of the defence-industrial complex of Ukraine were identified and a number of managerial decisions that can become drivers to accelerate the economic and ecological transformation of the defence-industrial complex of Ukraine were proposed.

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