Long term self-cleaning and photocatalytic performance of anatase added mortars exposed to the urban environment

2015 ◽  
Vol 96 ◽  
pp. 270-278 ◽  
Author(s):  
Maria Vittoria Diamanti ◽  
Riccardo Paolini ◽  
Marta Rossini ◽  
Aysegul Basak Aslan ◽  
Michele Zinzi ◽  
...  
Keyword(s):  
Urban Environment ◽  
Photocatalytic Performance ◽  
Self Cleaning

Long term exposure of self-cleaning and reference glass in an urban environment: A comparative assessment

2014 ◽  
Vol 79 ◽  
pp. 57-65 ◽  
Author(s):  
Anne Chabas ◽  
Stéphane Alfaro ◽  
Tiziana Lombardo ◽  
Aurélie Verney-Carron ◽  
Estifania Da Silva ◽  
...  
Keyword(s):  
Urban Environment ◽  
Comparative Assessment ◽  
Self Cleaning

A Review on High Temperature Stable Anatase TiO2 Photocatalysts

2016 ◽  
Vol 855 ◽  
pp. 78-93 ◽  
Author(s):  
Pradeepan Periyat ◽  
Binu Naufal ◽  
Sanjay Gopal Ullattil
Keyword(s):  
High Temperature ◽  
Metal Ions ◽  
Photocatalytic Performance ◽  
Anatase Phase ◽  
Co Doping ◽  
Phase Stabilization ◽  
Antibacterial Coatings ◽  
Recent Developments ◽  
Self Cleaning

This review focuses on the recent developments of high temperature stable anatase TiO2 photocatalyst. Eventhough TiO2 exists in different forms anatase, rutile and brookite, anatase phase stabilization is often the key to obtain the highest photocatalytic performance for TiO2, particularly for the use as an antibacterial and self-cleaning coatings in high temperature processed ceramics. Different methods available for the anatase stabilization in literature are critically reviewed and emphasis is placed on relatively recent developments. Currently available methods of anatase stabilizations are classified in to four categories viz (i) doping with metal ions (ii) doping with non-metal ions (iii) co-doping with metal and non-metal ions and (iv) dopant free stabilization by oxygen richness. Further to this, the application of these high temperature stabilized anatase TiO2 photocatalyst on various ceramics substrates such as tile, glass and sanitary wares as self-cleaning and antibacterial coatings are also been briefly discussed.

scholarly journals SOIL MANAGEMENT IN THE URBAN ENVIRONMENT: TODAY AND FUTURE

2019 ◽  
Vol 1 (1) ◽  
pp. 66-71
Author(s):  
Bogdan Stanescu ◽  
Adriana Cuciureanu
Keyword(s):  
Performance Management ◽  
Urban Environment ◽  
Urban Areas ◽  
Large Scale ◽  
Current Data ◽  
Soil Protection ◽  
The European Union ◽  
Residential Areas

The present article presents the expertise realized by the Department of Environmental Monitoring Pollution Evaluation within the INCD ECOIND, in the evaluation of the quality of urban soils in the municipality of Bucharest and the main big cities in Romania. The current data available at the level of the 27 member states of the European Union show that annually over 100,000 hectares of land are introduced into the urban environment, a direct consequence of the development of cities. There are a number of legislative obstacles to strategic soil protection measures. Moreover, at the level of the local authorities there is a conflict regarding the measures of soil protection in the long term, on the one hand, and, the accelerated economic development in the short term, on the other. European environmental experts consider that the urban development, absolutely necessary for the economic growth, requires an adequate management of the natural resources in order for the development to be done on a sustainable basis, respectively to follow a series of strategic objectives. In our country, at least in the last decade, we find on a large scale the conversion of industrial areas into commercial or residential areas. The footprint of industrial activities can be found even after long periods of time present by identifying the remnant of soil pollution or in those areas known as historically polluted (for example the town of Copsa Mica). The conclusions stemming from the assessment of pollution in urban areas over large areas, in correlation with the potential sources of pollution, underline the need to monitor the quality of soils in the urban environment, but also to apply a performance management in order to protect this natural resource in the long term.

Long term fading characteristics of VHF broadcast signals in an urban environment

2003 ◽  
Author(s):  
T. Banik ◽  
T. Pavlasek ◽  
J. LeBel
Keyword(s):  
Urban Environment

scholarly journals A Multi-Level Path Analysis of the Relationships between the Momentary Experience Characteristics, Satisfaction with Urban Public Spaces, and Momentary- and Long-Term Subjective Wellbeing

2019 ◽  
Vol 16 (19) ◽  
pp. 3621 ◽  
Author(s):  
Weijs-Perrée ◽  
Dane ◽  
van den Berg ◽  
van Dorst
Keyword(s):  
Path Analysis ◽  
Urban Environment ◽  
Public Space ◽  
Subjective Wellbeing ◽  
Public Spaces ◽  
Living Environment ◽  
Urban Public Space ◽  
Contextual Characteristics ◽  
Multi Level

Previous research has shown that the urban environment could influence people's behavior and wellbeing. However, little is still known about how the objective and subjective measures of the momentary experience of urban public spaces could contribute to the satisfaction with the urban environment of cities, which eventually could influence the momentary and long-term subjective wellbeing (SWB) of citizens. Therefore, the aim of this research is to gain insight into how momentary experience and satisfaction with the urban public space could contribute to the SWB of citizens, and thereby control for personal, contextual characteristics. Relationships were simultaneously analyzed using a multi-level path analysis approach based on a sample of 1056 momentary experiences of urban public spaces reported by 161 citizens of the urban area Eindhoven, The Netherlands. The results showed that personality and personal characteristics are highly important for explaining long-term SWB and subsequently long-term SWB positively influences momentary SWB (the degree of feeling secure, comfortable, happy and annoyed) together with the momentary satisfaction of urban public space characteristics. In addition, contextual characteristics, such as time/day and distance to facilities are important for explaining people’s momentary SWB. Policy makers and urban planners can use these results when developing policy and designing a healthy, attractive, livable and safe living environment for citizens.

scholarly journals Lotus-Inspired Multiscale Superhydrophobic AA5083 Resisting Surface Contamination and Marine Corrosion Attack

Materials ◽  
2019 ◽  
Vol 12 (10) ◽  
pp. 1592 ◽  
Author(s):  
Binbin Zhang ◽  
Weichen Xu ◽  
Qingjun Zhu ◽  
Shuai Yuan ◽  
Yantao Li
Keyword(s):  
Photoelectron Spectroscopy ◽  
Chemical Elements ◽  
Surface Contamination ◽  
Localized Corrosion ◽  
Metallic Surface ◽  
Water Repellent ◽  
Corrosion Attack ◽  
X Ray ◽  
Self Cleaning

The massive and long-term service of 5083 aluminum alloy (AA5083) is restricted by several shortcomings in marine and industrial environments, such as proneness to localized corrosion attack, surface contamination, etc. Herein, we report a facile and cost-effective strategy to transform intrinsic hydrophilicity into water-repellent superhydrophobicity, combining fluorine-free chemisorption of a hydrophobic agent with etching texture. Dual-scale hierarchical structure, surface height relief and surface chemical elements were studied by field emission scanning electron microscopy (FE-SEM), atomic force microscopy (AFM), energy dispersive X-ray spectroscopy (EDS) and X-ray photoelectron spectroscopy (XPS), successively. Detailed investigations of the wetting property, self-cleaning effect, NaCl-particle self-propelling, corrosion and long-term behavior of the consequent superhydrophobic AA5083 surface were carried out, demonstrating extremely low adhesivity and outstanding water-repellent, self-cleaning and corrosion-resisting performance with long-term stability. We believe that the low cost, scalable and fluorine-free transforming of metallic surface wettability into waterproof superhydrophobicity is a possible strategy towards anti-contamination and marine anti-corrosion.

scholarly journals Author Correction: Long-term field comparison of multiple low-cost particulate matter sensors in an outdoor urban environment

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Florentin M. J. Bulot ◽  
Steven J. Johnston ◽  
Philip J. Basford ◽  
Natasha H. C. Easton ◽  
Mihaela Apetroaie-Cristea ◽  
...  
Keyword(s):  
Particulate Matter ◽  
Urban Environment ◽  
Low Cost ◽  
Term Field

An amendment to this paper has been published and can be accessed via a link at the top of the paper.

Toward Easily Enlarged Superhydrophobic Copper Surfaces with Enhanced Corrosion Resistance, Excellent Self-Cleaning and Anti-Icing Performance by a Facile Method

2020 ◽  
Vol 20 (10) ◽  
pp. 6317-6325 ◽  
Author(s):  
Xueting Shi ◽  
Libin Zhao ◽  
Jing Wang ◽  
Libang Feng
Keyword(s):  
Corrosion Resistance ◽  
Superhydrophobic Surface ◽  
Cost Effective ◽  
Copper Plate ◽  
Plate Surface ◽  
Water Contact ◽  
Copper Surfaces ◽  
Self Cleaning ◽  
Water Repellence

This work reports a facile method for fabricating superhydrophobic surface on copper plate by AgNO3 treatment and dodecyl mercaptan modification. The as-prepared superhydrophobic copper plate presents hierarchical and rough morphology composed of nanosheets and nanoparticleformed matrix. Meanwhile, long alkyl chains are assembled onto the rough surface successfully. Consequently, the copper plate is endowed with excellent superhydrophobic performance with a water contact angle of 156.8° and a rolling angle of ca. 3°. Moreover, the superhydrophobicity has long-term durability and excellent stability. Grounded on the strong water repellence, the resultant superhydrophobic copper plate surface exhibits multi-functions. The excellent performance can be well explained by “Cushion effect” and Capillary phenomena. As a result, water and corrosive species can be prevented from contacting with the copper plate surface, and contaminants can be taken away easily by the rolling water droplets. Meanwhile, the icing process of water is delayed on the superhydrophobic surface. Therefore, the superhydrophobic copper is endued with enhanced corrosion resistance, excellent self-cleaning and anti-icing performance. We believe that this facile method provides a simple and cost-effective process to improve the properties of copper plate, and which may see practical application of the superhydrophobic materials.

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