A method for obtaining the catalyst that enables the purification of water dyed with methylene blue

Abstract

This invention relates to a method for obtaining Per-TiO2, Per:Gl-TiO2 and Per:G2-TiO2 catalysts that enable the purification of water dyed with methylene blue and its characterized by; Adding 1 gram of TiO2 nanoparticles to 20mL of PER solution at 10-4 M concentration, After mixing in an ultrasonic bath for 40 minutes, mixing in a magnetic stirrer for 1 hour, filtering through filter paper, it includes the process steps of first drying at room temperature and then at 80°C.

Description

[0001] A METHOD FOR OBTAINING THE CATALYST THAT ENABLES THE PURIFICATION OF WATER DYED WITH METHYLENE BLUE

[0002] Technical Field:

[0003] This invention relates to a method for obtaining Per-TiO2, Per:Gl-TiO2 and Per:G2-TiO2 catalysts that enable the purification of water dyed with methylene blue.

[0004] State of the Art:

[0005] Environmental pollution caused by waste textile dyes and / or heavy metal emissions is a major concern. Textile dyeing and finishing processes release large amounts of pollutants into the environment, including dyes, heavy metals and toxic chemicals, which contaminate lakes, rivers and seawater, soil and air, causing many adverse effects on ecosystems and human and animal health, such as: ; respiratory problems, cardiovascular diseases, cancer, neurological effects, allergies and asthma.

[0006] Due to the high dyeing properties of methylene blue and its high molar absorption coefficient in the visible (~664 nm) region (also high molar absorption in the UV region at ~300 nm), it is a widely used dye in various industries such as textiles, printing and pharmaceuticals. However, the release of methylene blue (MB) into water bodies creates serious environmental pollution.

[0007] Photocatalytic degradation of methylene blue Titanium dioxide (TiCh), typically used as a photocatalyst, is one of the most widely used options to initiate the degradation of organic compounds through the absorption of light energy. It is the most preferred photocatalyst with its high photo and thermal stability, abundance and low cost, nontoxicity and high UV activity. Besides all these positive properties of TiCh photocatalysis, a significant disadvantage is its relatively high e- / h+ recombination rate and inability to absorb visible light, which can limit the overall efficiency of the process. Currently used TiCh catalysts are inadequate for photodegradation. Namely; Only about 3% of solar energy is in the UV region, and the TiO2 catalyst can use only a certain part of it. Approximately 50% of solar energy is in the visible region and TiO2 cannot benefit from this energy. This means that we cannot benefit from a large part of solar energy, a clean and endless energy source. In addition, although metal-doped TiO2 s absorb into the visible region, some metals increase the cost and have toxic effects because they are rare elements or contain toxic effects.

[0008] The patent application numbered CN104163537A describes the device and method to thoroughly purify tap water using photocatalyst. The invention patent describes the photocatalytic oxidation function of the photocatalyst titanium dioxide film and provides a device and method for deep purification of tap water into plain drinking water. It has been observed that the patent application in question cannot go beyond the usage function of the above-mentioned catalysts and cannot overcome the existing technique.

[0009] As a result, a new technology that can overcome the above-mentioned disadvantages is needed.

[0010] Description of the Invention:

[0011] Our invention enables the dispersion of the graphene layer from the graphite found in the waste pencil with an inexpensive method, and the composite formed with TiO2 breaks down the methylene blue pollution in water into water and carbon dioxide by initiating the photocatalytic process with solar energy. Therefore, environmental pollution is prevented thanks to the catalysts obtained by our inventive method.

[0012] The main purpose of our invention is to clean water polluted with methylene blue by using different carbon-based composite nano TiCh s, defined as Per-TiCh, PerGl-TiCh and Per:G2-TiO2, respectively, by photocatalytic method. With the application of the obtained catalysts, the process of degradation of organic components begins by absorbing light energy in wastewater dyed with methylene blue. The catalysts of the invention have high photo and thermal stability and low cost, do not contain toxic substances, and also provide a great advantage compared to existing catalysts by allowing them to absorb visible light.

[0013] Description of the Figures:

[0014] The invention will be described with reference to the accompanying figures, so that the features of the invention will be more clearly understood and appreciated, but the purpose of this is not to limit the invention to these certain regulations. On the contrary, it is intended to cover all alternatives, changes and equivalences that can be included in the area of the invention defined by the accompanying claims. The details shown should be understood that they are shown only for the purpose of describing the preferred embodiments of the present invention and are presented in order to provide the most convenient and easily understandable description of both the shaping of methods and the rules and conceptual features of the invention. In these drawings.

[0015] Figure 1 It is the appearance of the invention's catalysts and titanium dioxide by fourier transform infrared spectroscopy.

[0016] Figure 2 It is the appearance of the catalysts belonging to the invention and the titanium dioxide belonging to the UV-VIS absorption graph.

[0017] Figure 3 This is the view showing the thermogravimetric analysis graph of the catalysts belonging to the invention.

[0018] Figure 4 It is the view showing the XRD pattern of the catalysts belonging to the invention.

[0019] Figure 5 It is the view of the catalysts belonging to the invention and the MB solution (catalyst-free solution) belonging to the absorption spectrometry graph.

[0020] The figures to help understand the present invention are numbered as indicated in the attached image and are given below along with their names. Detailed Description of The Invention:

[0021] The method subject to the invention; It is about obtaining PER-TiCh, PER:Gl-TiO2 and PER:G2-TiO2 catalysts that enable the photocatalytic degradation of water dyed with methylene dye (MB).

[0022] To obtain the PER-TiCh catalyst; The process steps include adding 1 gram of TiCb nanoparticles to 20mL of PER solution at 10'4M concentration, mixing in an ultrasonic bath for 40 minutes and then mixing in a magnetic stirrer for 1 hour, filtering through filter paper and drying first at room temperature and then at 80°C.

[0023] For the extraction of PER:Gl-TiO2 catalyst; The process steps are applied by adding 0.5 grams of powdered pencil graffiti and 1 gram of TiCb nanoparticles to a 20mL solution of 5x1 O'3M concentration of PER, mixing in an ultrasonic bath for 40 minutes, then mixing in a magnetic mixer for 1 hour, filtering through strainer paper and drying first at room temperature and then at 80°C.

[0024] To obtain the PER:G2-TiO2 catalyst; Adding 0.5 grams of powdered pencil graphite and 1 gram of TiCb nanoparticles to 20mL of PER solution at 10'4M concentration, mixing in an ultrasonic bath for 40 minutes, then stirring in a magnetic stirrer for 1 hour, filtering through filter paper and first at room temperature and then at 80°C.

[0025] The obtained catalysts were added to 25 mL of 2.5xl0'5M methylene blue solution under sunlight with a magnetic stirrer and after the degradation study was carried out by mixing with a magnetic stirrer under sunlight, it was observed that PER:G2-TiO2 catalyzed the MB solution best.

[0026] Perylenetetrahexylester (PER) in the catalyst, thanks to its planar and large aromatic pi conjugated core, interacts with the graphite obtained from the waste pencil tip in the solution environment, infiltrates between the graphite layers and ensures the stable distribution of the graphene layers in the solution. NanoTiCh is sensitized with PerGraphene (Gl: , G2:) carbon sources dispersed in different densities to obtain a catalyst.

[0027] In our invention, graphene was dispersed using Per dye and pencil graphite and nano TiCb composites were formed with Per: Graphene solution. Degradation study was carried out by adding 5mg of the obtained catalysts into 25mL of 2.5xlO'5M methylene blue solution and mixing them with a magnetic stirrer under sunlight. Initial and timechanging MB concentrations were monitored by absorption spectrometry (Figure-5). Considering the slopes, PER:G2-TiO2 catalyzed the MB (catalyst-free solution) solution best. It is followed by PER:Gl-TiO2 , and Per-TiCh , respectively.

Claims

CLAIMS1. The invention is related to the production of PER-TiCh, which purifies water by providing photocatalytic degradation of water contaminated with methylene blue, and its characterized by;Adding 1 gram of TiCh nanoparticles to 20mL of PER solution at 10'4M concentration,After mixing in an ultrasonic bath for 40 minutes, mixing in a magnetic stirrer for 1 hour, filtering through filter paper,It includes the process steps of first drying at room temperature and then at 80°C.

2. The invention is related to the production of PER:Gl-TiO2, which purifies water by providing photocatalytic degradation of water contaminated with methylene blue, and its characterized by;Adding 0.5 grams of powdered pencil graphite and 1 gram of TiCb nanoparticles to 20mL of PER solution at a concentration of 5x10'3M,After mixing in an ultrasonic bath for 40 minutes, mixing in a magnetic stirrer for 1 hour, filtering through filter paper,It includes the process steps of first drying at room temperature and then at 80°C.

3. The invention is related to the production of PER:G2-TiO2, which purifies water by providing photocatalytic degradation of water contaminated with methylene blue, and its characterized by;Adding 0.5 grams of powdered pencil graphite and 1 gram of TiCb nanoparticles to 20mL of PER solution at 10'4M concentration,After mixing in an ultrasonic bath for 40 minutes, mixing in a magnetic stirrer for 1 hour, filtering through filter paper,It includes the process steps of first drying at room temperature and then at 80°C.

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