scholarly journals Electrochemical and photoluminescence response of laser-induced graphene/electrodeposited ZnO composites

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
N. F. Santos ◽  
J. Rodrigues ◽  
S. O. Pereira ◽  
A. J. S. Fernandes ◽  
T. Monteiro ◽  
...  
Keyword(s):  
Optical Biosensors ◽  
Defect States ◽  
Environmentally Sustainable ◽  
Ohmic Losses ◽  
Electrode Capacitance ◽  
Composite Production ◽  
Controlled Deposition ◽  
Zno Rods ◽  
Multifunctional Nanocomposites

AbstractThe inherent scalability, low production cost and mechanical flexibility of laser-induced graphene (LIG) combined with its high electrical conductivity, hierarchical porosity and large surface area are appealing characteristics for many applications. Still, other materials can be combined with LIG to provide added functionalities and enhanced performance. This work exploits the most adequate electrodeposition parameters to produce LIG/ZnO nanocomposites. Low-temperature pulsed electrodeposition allowed the conformal and controlled deposition of ZnO rods deep inside the LIG pores whilst maintaining its inherent porosity, which constitute fundamental advances regarding other methods for LIG/ZnO composite production. Compared to bare LIG, the composites more than doubled electrode capacitance up to 1.41 mF cm−2 in 1 M KCl, while maintaining long-term cycle stability, low ohmic losses and swift electron transfer. The composites also display a luminescence band peaked at the orange/red spectral region, with the main excitation maxima at ~ 3.33 eV matching the expected for the ZnO bandgap at room temperature. A pronounced sub-bandgap tail of states with an onset absorption near 3.07 eV indicates a high amount of defect states, namely surface-related defects. This work shows that these environmentally sustainable multifunctional nanocomposites are valid alternatives for supercapacitors, electrochemical/optical biosensors and photocatalytic/photoelectrochemical devices.

Electrochemical and Photoluminescence Response of Laser-induced Graphene/Electrodeposited ZnO Composites

2021 ◽  
Author(s):  
Nuno Santos ◽  
Joana Rodrigues ◽  
Sónia Pereira ◽  
António Fernandes ◽  
Teresa Monteiro ◽  
...  
Keyword(s):  
Surface States ◽  
Optical Biosensors ◽  
Environmentally Sustainable ◽  
Ohmic Losses ◽  
Electrode Capacitance ◽  
Composite Production ◽  
Controlled Deposition ◽  
Zno Rods ◽  
Multifunctional Nanocomposites

Abstract The inherent scalability, low production cost and mechanical flexibility of laser-induced graphene (LIG) combined with its high electrical conductivity, hierarchichal porosity and large surface area are appealing characteristics for many applications. Still, other materials can be combined with LIG to provide added functionalities and enhanced performance. This work exploits the most adequate electrodeposition parameters to produce LIG/ZnO nanocomposites. Low-temperature pulsed electrodeposition allowed the conformal and controlled deposition of ZnO rods deep inside the LIG pores whilst maintaining its inherent porosity, which constitute fundamental advances regarding other methods for LIG/ZnO composite production. Compared to bare LIG, the composites more than doubled electrode capacitance up to 1.41 mF.cm-2 in 1 M KCl, whilst maintaining long-term cycle stability, low ohmic losses and swift electron transfer. The composites also display a luminescence band peaked at the orange/red spectral region, with main excitation maxima at ~3.33 eV matching the expected for the ZnO bandgap. A pronounced sub-bandgap tail of states with an onset absorption near 3.07 eV indicates a high amount of surface states. This work shows that these environmentally sustainable multifunctional nanocomposites are valid alternatives for supercapacitors, electrochemical/optical biosensors and photocatalytic/photoelectrochemical devices.

Development of Long Term Sustainability-Programmes for Ukrainian Mining Enterprises under Unstable Economic Conditions

2017 ◽  
Vol 22 ◽  
pp. 93-99
Author(s):  
Oleksandr Temchenko
Keyword(s):  
Sustainable Development ◽  
Resource Management ◽  
Natural Resource Management ◽  
Natural Resource ◽  
Economic Conditions ◽  
Environmentally Sustainable ◽  
Effective Functioning ◽  
Sustainable Natural Resource Management ◽  
Strategic Factors

The article deals with developing long-term sustainability programmes as a means of ensuring the effective functioning of mining enterprises. The authors focus on specific problems of Ukrainian mining enterprises’ activity, substantiation of implementing environmentally sustainable natural resource management. The system of strategic factors for ensuring mining enterprises’ sustainable development under unstable economic conditions is formed.

scholarly journals Assessing the Opportunities and Challenges of Green Finance in Italy: An Analysis of the Biomass Production Sector

2019 ◽  
Vol 11 (2) ◽  
pp. 517 ◽  
Author(s):  
Pasquale Falcone ◽  
Edgardo Sica
Keyword(s):  
Government Policies ◽  
Short Term ◽  
Production Sector ◽  
Environmentally Sustainable ◽  
Investment Projects ◽  
Policy Interventions ◽  
Green Finance ◽  
Effective Policy ◽  
Financial Issues

The present paper provides empirical evidence of the opportunities and challenges surrounding green finance (GF), looking at the financial issues that might prevent the investment decisions of green companies. To this end, we explore the case of Italian biomass producers by means of a discourse analysis supported by a survey administered to a pool of experts. Although our findings suggest that GF provides an opportunity for achieving environmentally sustainable innovation pathways, experts recognize that it does not actually prevent biomass producers from facing institutional and financial criticalities in funding their investment projects. Such criticalities include: uncertainty about government policies, the minimal involvement of financial suppliers in the biomass sector, the short-term orientation of financial instruments and the limited knowledge of financing options and technical expertise within companies. The results indicate that effective policy interventions should ensure that objectives are orientated towards the long term with the aim of reducing the risks perceived by financial institutions in funding biomass producers.

ENVIRONMENTALLY SUSTAINABLE ENERGY FOR THE EAST ASIA/PACIFIC REGION: IMPLICATIONS AND OPPORTUNITIES FOR AUSTRALIAN OIL AND GAS EXPLORERS AND PRODUCERS

1997 ◽  
Vol 37 (1) ◽  
pp. 722
Author(s):  
N.G. Grollman
Keyword(s):  
Fossil Fuels ◽  
Oil And Gas ◽  
Renewable Energy Sources ◽  
Value Added ◽  
Petroleum Exploration ◽  
Asia Pacific ◽  
Power Generators ◽  
Environmentally Sustainable ◽  
Resource Limitations

The oil and gas reserves of Australia and the East Asian region fall well short of the region's long-term requirements, even for a scenario that phases out all fossil fuels by the end of the 21st century. There is, therefore, no contradiction between vigorous exploration for oil and gas and the process of transition to renewable energy sources. However, to be an independent player in environmental policy-making, the Australian petroleum exploration industry should focus on its particular role within the energy sector as a whole, whose nature will change radically over the next several decades. This role will combine concerns over long term oil supply security with, in particular, the objective of reducing greenhouse gas emissions from oil and gas consumption to levels commensurate with Australia's international obligations. The role extends to Australian involvement in the region as a whole through the accrual of emissions credits from projects implemented jointly with developing countries. It also envisages that Australian explorers, especially those focussed on gas, will form alliances with downstream companies, power generators, appliance manufacturers and energy marketers as links in an integrated chain of operations with value added and emissions reduced at each stage. This re-orientation should lead the industry to question the extent to which its interests correspond with those of the coal and mineral industries, which do not face the same resource limitations.

Greening Our Front Porch: Environmental Sustainability in Collegiate Athletics

2019 ◽  
Vol 8 (1) ◽  
pp. 13-17
Author(s):  
Jamee A. Pelcher ◽  
Brian P. McCullough
Keyword(s):  
Environmental Sustainability ◽  
College Athletics ◽  
Collegiate Athletics ◽  
Sport Organizations ◽  
Athletic Department ◽  
Athletic Departments ◽  
Environmentally Sustainable ◽  
Sustainability Initiatives ◽  
Sports Organization

Sport organizations have begun to widely implement environmental sustainability into their daily operations, but more needs to be done to properly plan and implement these initiatives to ensure their long-term success. Specifically, college athletic departments struggle to be proactive in their approach to environmental sustainability despite the vast resources available to leverage in order to deeply commit to being an environmentally sustainable department on campus. This case study examines the strategic planning of sustainability initiatives in the Smallville University Athletic Department. This case provides students with an opportunity to (a) explore the importance of sustainability in sport, (b) analyze the role of stakeholders in a sports organization, (c) investigate common barriers to implementing sustainability in college athletics, and (d) consider creative options for implementing sustainable initiatives.

scholarly journals Impact of Industrial Waste on Natural Resources: A Review in the Context of Bangladesh

2021 ◽  
Vol 16 (2) ◽  
pp. 348-361
Author(s):  
Umama Begum Ruba ◽  
Kakon Chakma ◽  
Jarrin Yeasmin Senthi ◽  
Saidur Rahman
Keyword(s):  
Natural Resources ◽  
Industrial Waste ◽  
Forest Ecology ◽  
Industrial Sector ◽  
Policy Enforcement ◽  
Substantial Impact ◽  
Environmentally Sustainable ◽  
Effective Policy ◽  
Published Research

Although the industrial sector contributes significantly to Bangladesh's economic growth and development, unplanned rapid industrialization is having a detrimental impact on natural resources. Since industrial waste has become a major concern, this study reviewed previously published research papers to highlight the detrimental effects of industrial waste on natural resources. This review observed industrial waste have a substantial impact on natural resources, causing contamination of the air, water, and soil, alongside disruption of aquatic and forest ecology. Therefore, effective policy enforcement is expected to ensure that industrialization is sustainable, both in terms of mitigating environmental pollution and promoting more environmentally friendly industries. Bangladesh's long-term sustainability and prosperity necessitate industrialization, but it should be done in an environmentally sustainable manner.

Entering the anthropocene: ‘Geonauts’ or sorcerer’s apprentices?

2011 ◽  
Vol 50 (3-4) ◽  
pp. 462-471 ◽  
Author(s):  
Ignacy Sachs
Keyword(s):  
Climate Change ◽  
Food Security ◽  
Energy Security ◽  
Social Disparities ◽  
Human Intervention ◽  
Environmentally Sustainable ◽  
Earth Summit ◽  
Spaceship Earth ◽  
Global Transition

The Second Earth Summit to be held in Rio de Janeiro in 2012 will coincide with the ratification by the International Commission on Stratigraphy of the concept of a new geological era, the anthropocene. This term emphasizes the acknowledgement of the increasing impact of human intervention on the future of the Spaceship Earth. Humanity is thus at a crossroads and we need, more than ever, to abide by the principle of responsibility. We must mobilize ourselves to learn how to speedily mitigate deleterious climate change without losing sight of the urgent need to reduce the abyssal social disparities. The immediate imperative is to propose long-term development strategies to go hand in hand with an aggiornamento of long-term democratic planning. Such strategies must rely on two pillars: food security and energy security. Last but not least, the United Nations ought to take advantage of the forthcoming Earth Summit to set in motion a global transition towards a socially inclusionary and environmentally sustainable path.

Environmental Investment Versus Traditional Investment: Alternative or Redundant Pathways?

2018 ◽  
Vol 33 (2) ◽  
pp. 245-261
Author(s):  
Vítor Manuel de Sousa Gabriel ◽  
David Rodeiro-Pazos
Keyword(s):  
Alternative Energy ◽  
Pollution Prevention ◽  
Green Building ◽  
Environmental Indices ◽  
Environmentally Sustainable ◽  
Environmental Investment ◽  
Cointegration Tests ◽  
Market Factors ◽  
Equilibrium Relationships

Considering the short- and long-term equilibrium between indices, the present article analyses the relationship of two segments of stock markets: environmentally sustainable investment and traditional indices. We used Johansen cointegration tests and a multivariate model of conditioned heteroscedasticity on seven stock indices: five corresponding to segments of environmental investment, namely, regarding alternative energy, clean technology, green building, sustainable water, and pollution prevention, and two indices representative of traditional stock market segments, whose philosophy is based on a purely financial logic. The period considered was 8 years. Our result shows that in the long term, the pattern of behaviour of environmental indices differed from traditional indices, and no equilibrium relationships were identified. In the short term, the two groups of indices reported very similar behaviour, with the daily dynamics being determined fundamentally by cross-market factors.

scholarly journals Peripheral mobilities: looking at dormant, delegitimized and forgotten transport regimes

Tempo Social ◽  
2018 ◽  
Vol 30 (2) ◽  
pp. 73-85
Author(s):  
Massimo Moraglio
Keyword(s):  
Current Debate ◽  
Technological Determinism ◽  
Policy Makers ◽  
Environmentally Sustainable ◽  
Electric Cars ◽  
The Past ◽  
The Social ◽  
Environmental Failures

In the transport debate, policy makers seem to be under the spell of a technological determinism, in which innovation Tand novelty are the key concepts. Obsessed with westernised regimes and systems, the current debate misses the relevance of forgotten, peripheral and silent mobilities. In this regard, looking to those peripheral mobilities is not only important for reconstructing our memory, but can also offer tools to build socially and environmentally sustainable transport regimes. I suggest using Walter Benjamin’s Angelus Novus to address the past and future of infrastructural systems and the role of “old” regimes. This paper relies on David Edgerton’s work, but I push the argument further, claiming that an innovation-prone debate today creates the (social and environmental) failures of tomorrow. While electric cars and driver-less vehicles can be useful tools, we should consider that peripheral mobilities could better address the issue of socially and environmentally sustainable transports systems. Long-term vision can bridge the past and future of transport policies and offer hints to social science, humanity and governance.

Infrared Photosensitivity Due to the Yb-Induced Defect States in Pb1−xGexTe Alloys

1999 ◽  
Vol 607 ◽  
Author(s):  
E.P. Skipetrov ◽  
N.A. Chernova ◽  
E.A. Zvereva ◽  
E.I. Slyn'ko
Keyword(s):  
Persistent Photoconductivity ◽  
Helium Temperature ◽  
Defect States ◽  
Galvanomagnetic Properties ◽  
Jahn Teller ◽  
Kinetics Of

AbstractGalvanomagnetic properties and photoconductivity kinetics of Pb1−xGexTe(x≤0.04) alloys doped with Yb have been investigated. The alloys exhibit high infrared photosensitivity at temperature under 40 K; at helium temperature, the effect of persistent photoconductivity has been observed. The photoconductivity kinetics after terminating of infrared illumination consists of a fast and a long-term relaxation regions. We explain the observed effects by a capture of electrons into the Yb-induced states, that are subjected to the Jahn-Teller instability. The parameters of the Jahn-Teller states are estimated.

Sign in / Sign up

Export Citation Format

Share Document