Novel approach for high-efficiency recovery of titanium dioxide, hydrochloric acid, and organic solvents from titanium white waste acid

This research investigates using of poly (dimethylsiloxane-b-hydroxy ethyl acrylate) (PDMS-b-PHEA) diblock copolymer to stabilized TiO2nanoparticles in silicone fluid. The polar PHEA segment is expected to anchor on TiO2surface while the non-polar PDMS segment extends into silicone medium. To study effects of polymer structure on its stabilizing efficiency, PDMS-b-PHEA of structures 5-b-0.3, 5-b-1.1 and 8-b-1.0 are used. Results show that suspensions of particle with surface area ~40 and ~200 m2/g can be stabilized for longer than 1 and 7 hrs, respectively. The copolymer with relatively long PHEA and PDMS segments is highly effective as a dispersant. This is due to enhanced adsorption on particle surface and steric stabilization. However, in the system of 40 m2/g-TiO2, excess amounts could lead to polymer entanglement and particle agglomeration. The copolymer dispersant exhibits high efficiency for the 200 m2/g-TiO2suspension as well. In the latter system, higher concentration is required to effectively cover particle surface.

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Phenol Removal from Contaminated Wastewater Using Activated Carbon/Zeolite Composite Coated with Titanium Dioxide

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.690.103 ◽

2016 ◽

Vol 690 ◽

pp. 103-108

Author(s):

Khemmakorn Gomonsirisuk ◽

Thanakorn Wasanapiarnpong ◽

Charusporn Mongkolkachit

Keyword(s):

Titanium Dioxide ◽

Activated Carbon ◽

High Efficiency ◽

Adsorption Property ◽

Phenol Concentration ◽

Study Phase ◽

Phenol Removal ◽

High Porosity ◽

Good Efficiency ◽

Composite Substrate

Phenol and phenolic compounds in wastewater from various industries were toxic to water livings and human even in ppm concentration. A number of photocatalysts and adsorbents were applied for the low cost and good efficiency wastewater management to reduce phenol concentration in water. In this work titanium dioxide, one of high efficiency photocatalysts which is widely used in water treatement, was coated on the fabricated adsorbent composite substrate. The composite substrate composed of activated carbon and NaA zeolite presents high phenol adsorption because of high porosity and good ion exchange properties resulting in good adsorption property. Accordingly, the absorption could promote the photocatalytic activity of TiO2 catalyst. As the specimens were easily disposed after water treatment process, therefore, it was a good choice for lower energy consumption. The composite substrate was easily fabricated by simple extrusion and fired under non oxidation atmosphere at 650°C for 3 hours. Then polyurethane foam was inserted into the composite substrate to make it be able to float and be swirled by wind near water surface to get more UV excitation than deeper water. Phenol concentration was investigated by the UV absorbance at 270 nm using UV-Vis spectrophotometer. The XRD and SEM were used to study phase crystal structure and morphology of the composite.

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Improved High-Efficiency Conventional Solar Photovoltaic System: A Novel Approach

Solar Power and Energy Storage Systems ◽

10.1201/9780429458774-2 ◽

2019 ◽

pp. 25-68

Author(s):

Hee-Je Kim

Keyword(s):

High Efficiency ◽

Photovoltaic System ◽

Solar Photovoltaic ◽

System A ◽

Novel Approach ◽

Solar Photovoltaic System

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Optimal Falling Track Design for Twice detonating Fuze of Double event Fuel air Explosive with High Speed

Defence Science Journal ◽

10.14429/dsj.70.14868 ◽

2020 ◽

Vol 70 (4) ◽

pp. 366-373

Author(s):

Congliang Ye ◽

Qi Zhang

Keyword(s):

High Speed ◽

High Efficiency ◽

Single Point ◽

Design System ◽

Motion Trajectory ◽

Novel Approach ◽

Scale Experiment ◽

Set Up ◽

Point Center ◽

Double Event

To prevent the initiation failure caused by the uncontrolled fuze and improve the weapon reliability in the high-speed double-event fuel-air explosive (DEFAE) application, it is necessary to study the TDF motion trajectory and set up a twice-detonating fuze (TDF) design system. Hence, a novel approach of realising the fixed single-point center initiation by TDF within the fuel air cloud is proposed. Accordingly, a computational model for the TDF motion state with the nonlinear mechanics analysis is built due to the expensive and difficult full-scale experiment. Moreover, the TDF guidance design system is programmed using MATLAB with the equations of mechanical equilibrium. In addition, by this system, influences of various input parameters on the TDF motion trajectory are studied in detail singly. Conclusively, the result of a certain TDF example indicates that this paper provides an economical idea for the TDF design, and the developed graphical user interface of high-efficiency for the weapon designers to facilitate the high-speed DEFAE missile development.

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Removal of contaminants in indoor air by using green plant treated with titanium dioxide nanoparticles

10.21203/rs.2.11822/v1 ◽

2019 ◽

Author(s):

Khaled Fikry salama ◽

Mubashir Zafar Zafar

Keyword(s):

Air Pollution ◽

Titanium Dioxide ◽

Indoor Air ◽

Indoor Air Pollution ◽

Titanium Dioxide Nanoparticles ◽

Plant Root ◽

Ambient Air ◽

Green Plant ◽

Growth Media ◽

Novel Approach

Abstract Background: Indoor air pollution is important environmental health problem. Nanotechnology is one of the most important methods to reduce the air pollution. The aim of this study to determine the effectiveness of nanotechnology for removal of toxic air indoor pollution by using Saudi myrtle plants treated with titanium dioxide. Methods: Experiments were conducted in the two academic departments of labs at public sector universities. Aplying titanium dioxide-containing growth media to at least one of a Myrtus communis plant root, stem, and leaf. Growing the plant in the growth media, a gel growth media, or both; exposing the plant to contaminant-containing air Results: It is found that the levels of formaldehyde, Volatile organic compounds and other pollutants were significantly reduced the concentration from 10% to 98% in air. The duration of the intervention from 4 hours to 8 hours, Air containing the concentration of NO2 SO2, formaldehyde, TVOCs and CO reduced from range of 0.3 ppm- 0.4ppm to range of 0.1ppm -0.3 ppm after exposure of Myrtus plant to ambient air and duration of the exposure is 4 hours to 8 hours. Conclusion: Application of Tio2 in green plant specially Mytrus Communis is a novel approach for reduction of concentrations of harmful gaseous toxic and carcinogenic air pollutants in indoor environment.

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Synthesis of Zinc Oxide Supported on Titanium Dioxide for Photocatalytic Oxidative Desulfurization of Dibenzothiophene

Journal of Energy and Safety Technology (JEST) ◽

10.11113/jest.v1n1.2 ◽

2018 ◽

Vol 1 (1) ◽

Author(s):

Hitam, C.N.C. ◽

Jalil, A.A. ◽

Triwahyono, S.

Keyword(s):

Zinc Oxide ◽

Titanium Dioxide ◽

High Efficiency ◽

Diffuse Reflectance Spectroscopy ◽

Anatase Phase ◽

Oxidative Desulfurization ◽

Xrd Analysis ◽

X Ray Diffraction ◽

Desulfurization Rate ◽

Low Energy Consumption

Photocatalytic oxidative desulfurization (PODS) has received much attention due to low energy consumption and high efficiency, as well as simple and pollution-free operation. In this study, zinc oxide supported on titanium dioxide (ZnO/TiO2) catalysts were prepared via a simple electrochemical method. The presence of anatase phase TiO2 and wurtzite ZnO was confirmed by X-ray diffraction (XRD) analysis while band gap energies were determined by UV-Vis diffuse reflectance spectroscopy (UV-Vis DRS). The photocatalytic activity was tested for desulfurization of 100 mg/L dibenzothiophene (DBT). The highest desulfurization rate (2.20 × 10-3 mM/min) was achieved using 1 g/L of 10 wt% ZnO/TiO2 after 2 hr under UV irradiation.

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