Pub Date : 2020-01-01DOI: 10.15251/jobm.2020.121.1
Z. Jameel, M. Hussan
Titania have been extremely investigated for employing in the paint fields due to its importance as pigments. Therefore, TiO2 particles are perfect candidates in the paint industry. The nanoparticles were mixed with coating solution (i.e. hybrid sol-gel and organosilicate nanoparticles (OSNP) at concentration (1%wt) for both anatase and rutile. Films were prepared by spin coating method which has been studied by the (Electron Dispersive X-ray Spectroscopy) (EDS)/ (Scanning Electron Microscope) to define the components of concentrations. Results of Raman Spectroscopy to distinguish between crystalline phases, Raman shift resulted for anatase about (142.1, 411.1, 547.4 and 669.6) cm-1 , rutile (190,272,452 and 616) cm-1 . Additionally, the films were studied the thickness and refractive index (n) by Spectroscopic Ellipsometer(SE) for nano-anatase (1%wt) film thickness (128)nm and n equal (2.25), for nano-rutile films thickness (313.5)nm and n equal (2.5). Profilometer investigated the coating topography to demonstrate the Root Mean Square (RMS) to identify the roughness which increased by increasing particle size. Fourier Transform Infrared (FTIR) analysis showed the strong bonds of the nanoparticles in frequency region between (400-1000) cm-1 corresponds to Ti-O-Ti, also the bands at cm-1 were for a symmetric Si-O-Si stretching and vibration, respectively. Self-cleaning tests on the films were performed using Rhodamine B (RhB) as an antioxidant indicator.
由于二氧化钛作为颜料的重要性，它在涂料领域的应用受到了极大的研究。因此，TiO2颗粒是涂料行业的完美候选者。将纳米颗粒以1%wt的浓度与锐钛矿和金红石的涂层溶液(即混合溶胶-凝胶和有机硅酸盐纳米颗粒(osp))混合。采用自旋包覆法制备了膜，并用电子色散x射线能谱(EDS)/扫描电镜(sem)对膜的组成进行了分析。用拉曼光谱对晶相进行区分，锐钛矿的拉曼位移约为(142.1,411.1,547.4和669.6)cm-1，金红石的拉曼位移约为(190,272,452和616)cm-1。此外，采用椭偏光谱仪(SE)研究了纳米锐钛矿(1%wt)薄膜厚度为128 nm, n = 2.25时，纳米金红石薄膜厚度为313.5 nm, n = 2.5时薄膜的厚度和折射率(n)。剖面仪研究了涂层的形貌，以证明均方根(RMS)，以确定粗糙度随颗粒尺寸的增加而增加。傅里叶变换红外(FTIR)分析表明，纳米颗粒在(400-1000)cm-1之间的频率区域为Ti-O-Ti的强键，cm-1的波段分别为Si-O-Si的对称拉伸和振动。以罗丹明B (Rhodamine B, RhB)为抗氧化指示剂，对膜进行了自清洁试验。
{"title":"MANUFACTURING OF NANO HYBRID SOL- GEL COATING AND STUDYING THE RAMAN STRUCTURAL PROPERTIES, MORPHOLOGICAL CHARACTERISTICS AND THEIR APPLICATION AS ANTIOXIDANT FOR CONTAMINATE ROHDAMINE B (RhB) PIGMENT","authors":"Z. Jameel, M. Hussan","doi":"10.15251/jobm.2020.121.1","DOIUrl":"https://doi.org/10.15251/jobm.2020.121.1","url":null,"abstract":"Titania have been extremely investigated for employing in the paint fields due to its importance as pigments. Therefore, TiO2 particles are perfect candidates in the paint industry. The nanoparticles were mixed with coating solution (i.e. hybrid sol-gel and organosilicate nanoparticles (OSNP) at concentration (1%wt) for both anatase and rutile. Films were prepared by spin coating method which has been studied by the (Electron Dispersive X-ray Spectroscopy) (EDS)/ (Scanning Electron Microscope) to define the components of concentrations. Results of Raman Spectroscopy to distinguish between crystalline phases, Raman shift resulted for anatase about (142.1, 411.1, 547.4 and 669.6) cm-1 , rutile (190,272,452 and 616) cm-1 . Additionally, the films were studied the thickness and refractive index (n) by Spectroscopic Ellipsometer(SE) for nano-anatase (1%wt) film thickness (128)nm and n equal (2.25), for nano-rutile films thickness (313.5)nm and n equal (2.5). Profilometer investigated the coating topography to demonstrate the Root Mean Square (RMS) to identify the roughness which increased by increasing particle size. Fourier Transform Infrared (FTIR) analysis showed the strong bonds of the nanoparticles in frequency region between (400-1000) cm-1 corresponds to Ti-O-Ti, also the bands at cm-1 were for a symmetric Si-O-Si stretching and vibration, respectively. Self-cleaning tests on the films were performed using Rhodamine B (RhB) as an antioxidant indicator.","PeriodicalId":43605,"journal":{"name":"Journal of Optoelectronic and Biomedical Materials","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67041891","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-01-01DOI: 10.15251/jobm.2020.121.17
Z. E. Slaiby, A. Ramizy
GaN thin films were deposited on silicon substrate (Si) by pulse laser deposition in a nitrogen atmosphere to use as a gas sensor for detection Ammonia (NH3) gas. Surface morphology of gallium nitride nano thin films were characterized by atomic force microscopy (AFM). The film appears homogenous and the distribution and grain shapes is nearly uniform. High density of nanostructure GaN was created as shown in field emission scan electron microscopy (FESEM) image. XRD measurement showed that GaN have a hexagonal structure. The elemental composition of materials was identified by use of Energy Dispersive X- Ray Analysis (EDX). The average concentration of nitrogen according to EDX analysis for the samples are increase with increasing number of laser pulses. Optical measurements were performed to measure the band gap by UV-visible spectroscopy. The gas sensitivity for NH3 gas were measured for fabricated gas sensor device as a function of concentration.
{"title":"SYNTHESIS GALLIUM NITRIDE THIN FILMS BY PULSED LASER DEPOSITION AS AMMONIA (NH3) GAS SENSOR","authors":"Z. E. Slaiby, A. Ramizy","doi":"10.15251/jobm.2020.121.17","DOIUrl":"https://doi.org/10.15251/jobm.2020.121.17","url":null,"abstract":"GaN thin films were deposited on silicon substrate (Si) by pulse laser deposition in a nitrogen atmosphere to use as a gas sensor for detection Ammonia (NH3) gas. Surface morphology of gallium nitride nano thin films were characterized by atomic force microscopy (AFM). The film appears homogenous and the distribution and grain shapes is nearly uniform. High density of nanostructure GaN was created as shown in field emission scan electron microscopy (FESEM) image. XRD measurement showed that GaN have a hexagonal structure. The elemental composition of materials was identified by use of Energy Dispersive X- Ray Analysis (EDX). The average concentration of nitrogen according to EDX analysis for the samples are increase with increasing number of laser pulses. Optical measurements were performed to measure the band gap by UV-visible spectroscopy. The gas sensitivity for NH3 gas were measured for fabricated gas sensor device as a function of concentration.","PeriodicalId":43605,"journal":{"name":"Journal of Optoelectronic and Biomedical Materials","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67042894","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-01-01DOI: 10.15251/jobm.2020.121.9
N. Harun, C. Sheng, M. Sabri, A. N. Dagang, H. Salleh
Photocatalytic wastewater treatments applying the semiconductor photocatalysts to remove toxins or pollutants from wastewater become more important nowadays. In this study, the photocatalytic study was firstly conducted on the photodegradation of rhodamine B (RB) dye in tap water by using TiO2 as photocatalysts under short wavelength (high energy) UV-C light irradiation. The results show that a considerable increase in the degradation of RB can be obtained through a combination of TiO2 and UV-C light. In addition, hydrogen peroxide (H2O2) was added in the RB solution containing TiO2 to improve the degradation efficiency of RB dyes. The result shows that 98 % degradation efficiency of 20 ppm RB is achieved within 180 min irradiation time in the solution containing 0.5 g/l TiO2 and 1 M H2O2 concentrations, which is higher than the reported literature value.
利用半导体光催化剂去除废水中的毒素或污染物已成为光催化废水处理的重要课题。本研究首先以TiO2为光催化剂，在短波(高能)UV-C光照射下，对自来水中罗丹明B (RB)染料进行了光催化降解研究。结果表明，TiO2与UV-C光结合可显著提高RB的降解率。此外，在含TiO2的RB溶液中加入过氧化氢(H2O2)，提高RB染料的降解效率。结果表明，在含有0.5 g/l TiO2和1 M H2O2浓度的溶液中，在180 min的辐照时间内，20 ppm RB的降解效率达到98%，高于文献报道的值。
{"title":"IMPACT OF TiO2 AND H2O2 ON PHOTOCATALYTIC DEGRADATION OF PHODAMINE B UNDER ULTRAVIOLET C (UV-C) RADIATION FOR EFFICIENT POLLUTED WASTEWATER TREATMENT","authors":"N. Harun, C. Sheng, M. Sabri, A. N. Dagang, H. Salleh","doi":"10.15251/jobm.2020.121.9","DOIUrl":"https://doi.org/10.15251/jobm.2020.121.9","url":null,"abstract":"Photocatalytic wastewater treatments applying the semiconductor photocatalysts to remove toxins or pollutants from wastewater become more important nowadays. In this study, the photocatalytic study was firstly conducted on the photodegradation of rhodamine B (RB) dye in tap water by using TiO2 as photocatalysts under short wavelength (high energy) UV-C light irradiation. The results show that a considerable increase in the degradation of RB can be obtained through a combination of TiO2 and UV-C light. In addition, hydrogen peroxide (H2O2) was added in the RB solution containing TiO2 to improve the degradation efficiency of RB dyes. The result shows that 98 % degradation efficiency of 20 ppm RB is achieved within 180 min irradiation time in the solution containing 0.5 g/l TiO2 and 1 M H2O2 concentrations, which is higher than the reported literature value.","PeriodicalId":43605,"journal":{"name":"Journal of Optoelectronic and Biomedical Materials","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67043509","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-01-01DOI: 10.15251/jobm.2020.122.43
H. Anwar, S. M. B. Naqvi, B. Abbas, M. Shahid, M. Iqbal, M. Shaharyar, A. Islam, F. Batool, M. Khalid, A. Jamil
Copper oxide (CuO) nanoparticles are important due to their excellent properties and applications such as nano electronics, gas sensors, solar cell and super conductors. Copper oxide have been successfully prepared by using co-precipitation method. CuCl2. 2H2O and NaOH are used in the synthesis of copper oxide nanoparticles as a precursers. Samples annealed at different temperatures such as 400 ºC, 500 ºC, 600 ºC and 700 ºC. The as prepared samples were investigated X-ray diffraction (XRD), scanning electron microscopy (SEM), UV-vis spectroscopy. Their using Antibacterial activity against the two bacterial strain Gram-positive and Gram negative such as (E. coli and B. subtilis) and Hemolysis. Was also investigated XRD analysis showed structure of copper oxide nanoparticles was monoclinic and average crystallite size was found to increase with an increase in annealing temperature in the range of 35 nm to 45 nm. Morphology of SEM images showed that CuO nanostructures were rod like at lower temperature but in higher temperature sphere- like shape was observed. UV-visible spectroscopy results revealed the variation of band gap energy with increasing annealing temperature. Samples prepared at higher temperatures exhibited high antibacterial activity for E. coli and B. subtilis and low toxicity. Low homolytic is safer to use in different applications.
{"title":"INVESTIGATION OF THE EFFECT OF ANNEALING TEMPERATURE ON STRUCTURAL, OPTICAL AND ANTIBACTERIAL PROPERTIES OF COPPER OXIDE NANOPARTICLES PREPARED BY FACILE CO-PRECIPITATION ROUTE","authors":"H. Anwar, S. M. B. Naqvi, B. Abbas, M. Shahid, M. Iqbal, M. Shaharyar, A. Islam, F. Batool, M. Khalid, A. Jamil","doi":"10.15251/jobm.2020.122.43","DOIUrl":"https://doi.org/10.15251/jobm.2020.122.43","url":null,"abstract":"Copper oxide (CuO) nanoparticles are important due to their excellent properties and applications such as nano electronics, gas sensors, solar cell and super conductors. Copper oxide have been successfully prepared by using co-precipitation method. CuCl2. 2H2O and NaOH are used in the synthesis of copper oxide nanoparticles as a precursers. Samples annealed at different temperatures such as 400 ºC, 500 ºC, 600 ºC and 700 ºC. The as prepared samples were investigated X-ray diffraction (XRD), scanning electron microscopy (SEM), UV-vis spectroscopy. Their using Antibacterial activity against the two bacterial strain Gram-positive and Gram negative such as (E. coli and B. subtilis) and Hemolysis. Was also investigated XRD analysis showed structure of copper oxide nanoparticles was monoclinic and average crystallite size was found to increase with an increase in annealing temperature in the range of 35 nm to 45 nm. Morphology of SEM images showed that CuO nanostructures were rod like at lower temperature but in higher temperature sphere- like shape was observed. UV-visible spectroscopy results revealed the variation of band gap energy with increasing annealing temperature. Samples prepared at higher temperatures exhibited high antibacterial activity for E. coli and B. subtilis and low toxicity. Low homolytic is safer to use in different applications.","PeriodicalId":43605,"journal":{"name":"Journal of Optoelectronic and Biomedical Materials","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67043545","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-01-01DOI: 10.15251/jobm.2020.122.33
D. Bekkar, Y. Meftah, B. Benhaoua, A. Rahal, A. Benhaoua, A. Hamzaoui
0-20 wt % Cobalt doped hematite iron oxide (α-Fe2O3) thin films were deposited on 500°C heated glass substrates via spray pyrolysis method with moving nozzle. The dopant concentration is stepped as 0, 2%, 5%, 10%, and 20%. For the non doped thin film, XRD analyses exhibit the presence of diffraction peaks corresponding to planes (012), (104), (110), (113), (024), (116), (214), and (300) confirming the formation of α-Fe2O3 phase. While for the Co doped α-Fe2O3 thin films, further diffraction peaks corresponding to α-Fe2O3 phase, peaks matching well with the planes (200) and (311) of cobalt oxides CoO and Co3O4 respectively are observed. Co substitution was confirmed by XRD based on peaks shift of hematite towards higher angles. The crystallite size of the hematite increases from 37nm to 47nm with increasing dopant from 0 to 2wt. % Co/Fe. Then it decreases to 28nm for 20wt. % Co doping. While for cobalt oxides CoO and Co3O4, their crystallite sizes were found to be in the range of 29-32nm and 18-43nm, respectively. The optical investigation indicates an increase in transmittance with increasing the dopant level reaching 80% at 600nm with blue shift in the band gap for the doped samples. FTIR study confirms the existence of the cobalt oxides at wave number average 460-542cm-1 . As an application in the areas of the antibacterial test, cobalt doped hematite nanoparticles (NPs) exhibit a good antibacterial activity against E. coli, Listeria innocua, Pseudo monas aeruginosa and Salmonella beyond 5wt. % Co/Fe doping.
{"title":"SYNTHESIS, CHARACTERIZATION, AND ANTIBACTERIAL ACTIVITY OF COBALT DOPED (α-Fe2O3) THIN FILMS","authors":"D. Bekkar, Y. Meftah, B. Benhaoua, A. Rahal, A. Benhaoua, A. Hamzaoui","doi":"10.15251/jobm.2020.122.33","DOIUrl":"https://doi.org/10.15251/jobm.2020.122.33","url":null,"abstract":"0-20 wt % Cobalt doped hematite iron oxide (α-Fe2O3) thin films were deposited on 500°C heated glass substrates via spray pyrolysis method with moving nozzle. The dopant concentration is stepped as 0, 2%, 5%, 10%, and 20%. For the non doped thin film, XRD analyses exhibit the presence of diffraction peaks corresponding to planes (012), (104), (110), (113), (024), (116), (214), and (300) confirming the formation of α-Fe2O3 phase. While for the Co doped α-Fe2O3 thin films, further diffraction peaks corresponding to α-Fe2O3 phase, peaks matching well with the planes (200) and (311) of cobalt oxides CoO and Co3O4 respectively are observed. Co substitution was confirmed by XRD based on peaks shift of hematite towards higher angles. The crystallite size of the hematite increases from 37nm to 47nm with increasing dopant from 0 to 2wt. % Co/Fe. Then it decreases to 28nm for 20wt. % Co doping. While for cobalt oxides CoO and Co3O4, their crystallite sizes were found to be in the range of 29-32nm and 18-43nm, respectively. The optical investigation indicates an increase in transmittance with increasing the dopant level reaching 80% at 600nm with blue shift in the band gap for the doped samples. FTIR study confirms the existence of the cobalt oxides at wave number average 460-542cm-1 . As an application in the areas of the antibacterial test, cobalt doped hematite nanoparticles (NPs) exhibit a good antibacterial activity against E. coli, Listeria innocua, Pseudo monas aeruginosa and Salmonella beyond 5wt. % Co/Fe doping.","PeriodicalId":43605,"journal":{"name":"Journal of Optoelectronic and Biomedical Materials","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67043658","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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