Akple M.S.,Ho Polytechnic |
Low J.,Wuhan University of Technology |
Wageh S.,King Abdulaziz University |
Al-Ghamdi A.A.,King Abdulaziz University |
And 2 more authors.
Applied Surface Science | Year: 2015
As a clean and renewable solar H2-production system to address the increasing global environmental crisis and energy demand, photocatalytic hydrogen production from water splitting using earth abundant materials has received a lot of attention. In this study, WS2-graphitic carbon nitride (g-C3N4) composites were prepared using WO3 and thiourea as precursors through a gas-solid reaction. Different amount of WS2 were loaded on g-C3N4 to form the heterostructures and the composite samples exhibited enhanced photocatalytic activity for H2 production under visible light. The composite sample with 0.01wt% WS2 exhibited the highest H2-production rate of 101μmolg-1 h-1, which was even better than that of the Pt-C3N4 sample with the same loading content. The high photocatalytic activity was attributed to the formation of heterojunction between g-C3N4 and WS2 cocatalyst which allowed for effective separation of photogenerated charge carriers. This work showed the possibility for the utilization of low cost WS2 as an efficient cocatalyst to promote the photocatalytic H2 production of g-C3N4. © 2015 Elsevier B.V.
Akpalu W.,Farmingdale State College |
Normanyo A.K.,Ho Polytechnic
Environment and Development Economics | Year: 2014
Capture fish stocks are facing an increasing threat of extinction, partly due to the use of illegal fishing methods. In developing coastal countries - where fishing activities are the mainstay of the population along the coast - livelihoods are being directly threatened. Although a number of studies exist on fishing regulations and those who violate them, little has been done on the relationship between intrinsic catch potentials/fishing skills and illegal fishing behavior. Using data on violations of light attraction regulation among small-scale fishers in Ghana, our results show that the risk of punishment, the amount of fishing experience, the skipper's age, and religious norms all influence the decision to violate fishing regulations. Most importantly, we found that violators and non-violators have different fishing skills. Consequently, policies targeting illegal fishing must focus on equalizing efficiency and/or fishing skills among the fishermen as well as on traditional variables that influence violation decisions. Copyright © Cambridge University Press 2013.
Akple M.S.,Wuhan University of Technology |
Akple M.S.,Ho Polytechnic |
Low J.,Wuhan University of Technology |
Qin Z.,Wuhan University of Technology |
And 5 more authors.
Cuihua Xuebao/Chinese Journal of Catalysis | Year: 2015
Nitrogen-doped anatase TiO2 microsheets with 65% (001) and 35% (101) exposed faces were fabricated by the hydrothermal method using TiN as precursor in the presence of HF and HCl. The samples were characterized by scanning electron microscopy, X-ray diffraction, N2 adsorption, X-ray photoelectron spectroscopy, UV-visible spectroscopy, and electrochemical impedance spectroscopy. Their photocatalytic activity was evaluated using the photocatalytic reduction of CO2. The N-doped TiO2 sample exhibited a much higher visible light photocatalytic activity for CO2 reduction than its precursor TiN and commercial TiO2 (P25). This was due to the synergistic effect of the formation of surface heterojunctions on the TiO2 microsheet surface, enhanced visible light absorption by nitrogen-doping, and surface fluorination. © 2015, Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by Elsevier B.V. All rights reserved.
Buadi D.K.,Ho Polytechnic |
Anaman K.A.,University of Ghana |
Anaman K.A.,Macquarie University |
Kwarteng J.A.,University Of Cape Coast
Agricultural Systems | Year: 2013
Since independence in 1957, the provision of major support services for farmers such as physical infrastructure and research services for the agricultural sector in Ghana has been the preserve of the government. However, with respect to agricultural credit, extension and marketing services, there has been a mix of both public and private sector participation with public services declining in quantity over the period of structural adjustment programmes in the country beginning in 1983-2006. Over this 24-year period, government involvement in extension delivery to farmers declined. Since 2007 the level of government support for the agricultural sector has increased considerably with government support for investment in agriculture outpacing its recurrent expenditures for the sector. The decline of government extension delivery led to an increased role for not-for-profit organizations such as non-governmental organizations (NGOs) in supporting farmers. We assessed the quality of extension services provided by four NGOs in two municipalities of the Central Region of Ghana: Mfantseman and Komenda-Edina-Eguafo-Abrem (KEAA). The study was based on random sampling of farmers with the gender used as the key attribute in the choice of the optimal random sample. Beneficiary farmers assessed six main services provided by NGOs, namely information support, input supply, training, technology transfer, credit and monitoring and evaluation of extension activities. Farmers generally perceived the services to be relevant to their operations. However, they had mixed opinions concerning the services with respect to their adequacy, availability and their timeliness of supply. Monitoring and evaluation of extension activities by NGOs was generally acceptable. © 2013 Elsevier Ltd.
Honyenuga B.Q.,Open University of the Netherlands |
Honyenuga B.Q.,Ho Polytechnic |
Tuninga R.S.J.,Kingston University |
Ghijsen P.W.T.,Open University of the Netherlands
Journal of Transnational Management | Year: 2014
Changes in the business environment in general and in emerging countries, in particular, challenges business organizations to rethink new ways of managing performance in order to survive. This research applied an HPO framework to find out the extent to which it explains performance in the insurance industry in Ghana. The study adopted a quantitative deductive approach and analyzed the link between the HPO framework and firm performance using multiple regression. The findings revealed that three out of the five HPO factors, namely continuous improvement and renewal, and workforce quality and long-term orientation have positive influences on firm performance. The findings have useful implications for managers of companies in emerging countries. © 2014, Taylor & Francis Group, LLC.