scholarly journals Mineral Layer Fillers for the Production of Functional Materials

Materials ◽  
2021 ◽  
Vol 14 (12) ◽  
pp. 3369
Author(s):  
Lidia G. Gerasimova ◽  
Marina V. Maslova ◽  
Ekaterina S. Shchukina
Keyword(s):  
Titanium Dioxide ◽  
Functional Materials ◽  
Sulfate Solution ◽  
Original Method ◽  
Mineral Layer ◽  
Rutile Structure ◽  
Technogenic Waste ◽  
The Cost ◽  
Rutile Titanium Dioxide ◽  
Technological Methods

An original method based on the use of technogenic waste from the processing of mineral-layered materials, in particular phlogopite for obtaining highly efficient functional compositions of the “mica-TiO2”, has been developed. The composition core is a nanosized mica flake coated with mesoporous titanium dioxide of an anatase or rutile structure. Energy-saving and environmentally friendly technological methods are based on the splitting of the mica followed by heterogeneous electrohydrolysis of a mixture of titanium (IV) sulfate solution and flake particles. No destruction of the mica surface, which provided the obtained uniform coatings, has been observed. Such coatings are used in photocatalysis processes and possess a self-cleaning capability. Core–shell compositions are more economically attractive compared with titanium dioxide, in particular TiO2 grade P25 (Degusse). The core of the transparent flake and the shell of the rutile titanium dioxide endows the final product with a pearlescent optical effect. This type of material is widely used in the manufacturing of paints and varnishes, printing inks, cosmetics, etc. The use of technogenic waste could significantly reduce the cost of the final product, which would ensure its widespread use in various industries.

scholarly journals Coagulation performance evaluation of alginate as a natural coagulant for the treatment of turbid water

2021 ◽  
Author(s):  
Packiam Saranya ◽  
S. T. Ramesh ◽  
R. Gandhimathi
Keyword(s):  
Calcium Ions ◽  
Functional Materials ◽  
Capsular Polysaccharides ◽  
Cost Of Treatment ◽  
Coagulation And Flocculation ◽  
Coagulation Performance ◽  
Before And After ◽  
Box Structure ◽  
The Cost ◽  
Flocculation Process

Abstract Alginates are quite abundant in nature as they occur both as a structural component in marine brown algae (Phaeophyceae) comprising up to 40% of dry matter and as capsular polysaccharides in soil bacteria. Alginic acid is the only polysaccharide, which naturally contains carboxyl groups in each constituent residue, and possesses various abilities for functional materials. Experiments were carried out for the water of turbidity 300 NTU. Alginate as such doesn't act as a coagulant instead it should be converted to calcium alginate by adding calcium ions. Calcium chloride was used for imparting calcium ions necessary for the reaction. The dosage of calcium was fixed as 50 mg/L, 75 mg/L, 100 mg/L, 150 mg/L, 200 mg/L, and alginate doses between 2 to 10 mg/L. Calcium dosage below 50 mg/L was not sufficient enough for the formation of egg-box structure which is responsible for the coagulation and flocculation process. For the mechanism of charge neutralization to take place effectively, calcium should be added first followed by alginate. pH and conductivity of the sample remain constant before and after the treatment. The dosage of alginate required for the treatment is less so the cost of treatment also will be very less, thus alginate can replace the usage of chemical coagulants like alum.

scholarly journals STUDY ON AGEING RESISTANCE OF POLYPROPYLENE/NANO-SCALE RUTILE TITANIUM DIOXIDE/POE POLYOLEFIN ELASTOMER COMPOSITES

2006 ◽  
Vol 006 (2) ◽  
pp. 219-224 ◽  
Author(s):  
Gang GUO ◽  
Jie YU ◽  
Zhu LUO ◽  
Zhiyong QIAN ◽  
Wanxia HUANG ◽  
...  
Keyword(s):  
Titanium Dioxide ◽  
Nano Scale ◽  
Polyolefin Elastomer ◽  
Elastomer Composites ◽  
Rutile Titanium Dioxide

scholarly journals Method of Assessing the Risk of Implementing Railway Investments in Terms of the Cost of Their Implementation

2021 ◽  
Vol 13 (23) ◽  
pp. 13085
Author(s):  
Jan Kowalski ◽  
Mieczysław Połoński ◽  
Marzena Lendo-Siwicka ◽  
Roman Trach ◽  
Grzegorz Wrzesiński
Keyword(s):  
Construction Projects ◽  
Original Method ◽  
Project Managers ◽  
Simple Method ◽  
Construction Companies ◽  
Risk Forecasting ◽  
Specific Object ◽  
Effective Cost ◽  
The Cost ◽  
The Impact

Exceeding the approved budget is often an integral part of the implementation of construction projects, especially those where unforeseen threats may occur. Therefore, each construction investment should contain elements of risk forecasting, mainly in terms of the cost of its implementation. Only a small number of institutions apply effective cost control methods, taking into account the specifics of a given industry. Especially small construction companies that participate in the structure of the implementation of large construction projects as subcontractors. The article presents a method by which it is possible to determine, with certain probability, the final cost of railway construction investments carried out in Poland. The method was based on a reliable database of risk factors published in sources. In this article, the main presumptions of the original method are presented, which take into account the impact of potential, previously recognized, risks specific to railway investments, and enable project managers to relate them to the conditions where the implementation of a specific object is planned. The authors assumed that such a relatively simple method, supported by a suitable computational program, would encourage teams that plan to implement railway projects to use it and increase the credibility of their schedules.

scholarly journals Advantages of Commercial Rutile Titanium Dioxide Slurry for Paper Applications

2003 ◽  
Vol 57 (8) ◽  
pp. 1157-1164,030
Author(s):  
T. Wayne Logan ◽  
Shuichi Iyoda
Keyword(s):  
Titanium Dioxide ◽  
Rutile Titanium Dioxide

scholarly journals Progress of MOF-Derived Functional Materials Toward Industrialization in Solar Cells and Metal-Air Batteries

Catalysts ◽  
2020 ◽  
Vol 10 (8) ◽  
pp. 897
Author(s):  
Mohamed Elhousseini Hilal ◽  
Abdelkhalk Aboulouard ◽  
Abdul Rehman Akbar ◽  
Hussein A. Younus ◽  
Nesrin Horzum ◽  
...  
Keyword(s):  
Photovoltaic Cells ◽  
Functional Materials ◽  
High Reactivity ◽  
Life Cycles ◽  
Advanced Materials ◽  
Conversion Materials ◽  
Metal Organic ◽  
Power Outputs ◽  
Electrical Demand ◽  
The Cost

The cutting-edge photovoltaic cells are an indispensable part of the ongoing progress of earth-friendly plans for daily life energy consumption. However, the continuous electrical demand that extends to the nighttime requires a prior deployment of efficient real-time storage systems. In this regard, metal-air batteries have presented themselves as the most suitable candidates for solar energy storage, combining extra lightweight with higher power outputs and promises of longer life cycles. Scientific research over non-precious functional catalysts has always been the milestone and still contributing significantly to exploring new advanced materials and moderating the cost of both complementary technologies. Metal-organic frameworks (MOFs)-derived functional materials have found their way to the application as storage and conversion materials, owing to their structural variety, porous advantages, as well as the tunability and high reactivity. In this review, we provide a detailed overview of the latest progress of MOF-based materials operating in metal-air batteries and photovoltaic cells.

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