Journal of Applied Chemical Science International最新文献

Environmental Impact of Heavy Metals in Soils from Electronic Waste Dumpsite in Southwest Nigeria 尼日利亚西南部电子垃圾堆放场土壤中重金属对环境的影响

Journal of Applied Chemical Science International Pub Date : 2024-03-11 DOI: 10.56557/jacsi/2024/v15i18588

Nna Orji, Chinenye

{"title":"Environmental Impact of Heavy Metals in Soils from Electronic Waste Dumpsite in Southwest Nigeria","authors":"Nna Orji, Chinenye","doi":"10.56557/jacsi/2024/v15i18588","DOIUrl":"https://doi.org/10.56557/jacsi/2024/v15i18588","url":null,"abstract":"The massive influx of electronics into Nigeria has led to environmental challenges due to increase in the production of electronic waste, which causes serious health and pollution problems. This study investigated the level and impact of heavy metals in 30 soil samples from an electronic waste disposal site in southwest Nigeria, using appropriate standard methods. The range concentrations of the heavy metals were 1615 mg/kg Pb, 20 mg/kg Cr, 266.32 mg/kg Ni, 22.39 mg/kg Cd and 242.03 mg/kg Cu at depth 0-15cm while 1453.56 mg/kg Pb, 26.31 mg/kg Cr, 497.11 mg/kg Ni, 17.04 mg/kg Cd and 230.31 mg/kg Cu were observed at depth 15-30 cm. The concentrations of the heavy metals exceeded the allowable limits, except for Cr. The mean degree of contaminations, 18.15 and 14.35, were observed at depths 0-15 and 15-30 cm respectively and indicated considerable and moderate degree of contamination by the heavy metals, respectively. The mean Potential index of 323.52 and 225.79 at depth 0-15 cm and 15-30 cm showed sever toxicity and moderate toxicity, respectively. The I-geo. of Pb at both depths indicated extreme contamination. This study reveals sever potential environmental and health hazards in the neighborhood, ecosystem, and community, and advises that the government should establish a national policy on e-waste and regulate testing of all electronics imported under the names of reuse, donation and recycling, which will halt the importation of e-scraps (e-waste).\u0000 ","PeriodicalId":251966,"journal":{"name":"Journal of Applied Chemical Science International","volume":"108 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140254430","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}

引用次数: 0

Extraction and Characterization of Coconut Oil in Cream Production 奶油生产中椰子油的提取与表征

Journal of Applied Chemical Science International Pub Date : 2023-08-25 DOI: 10.56557/jacsi/2023/v14i28354

Ejimofor, Chiamaka Frances, N. Enoch, O. Johnson, Mbaukwu, Onyinye Ann, Afam-Ezeaku, Chikaodili Eziamaka

{"title":"Extraction and Characterization of Coconut Oil in Cream Production","authors":"Ejimofor, Chiamaka Frances, N. Enoch, O. Johnson, Mbaukwu, Onyinye Ann, Afam-Ezeaku, Chikaodili Eziamaka","doi":"10.56557/jacsi/2023/v14i28354","DOIUrl":"https://doi.org/10.56557/jacsi/2023/v14i28354","url":null,"abstract":"The use of coconut oil as a moisturiser in cream manufacture has been a recent topic of discussion. In this work, coconut oil was extracted from coconut seeds using the Soxhlet extraction method, and the resulting oil was then characterised and utilised to make cream. As a solvent, regular hexane was employed during the extraction procedure. The coconut seeds' poximate composition reveals that their moisture content ranges from 38 to 48 percent, along with ash (1 to 4 percent), lipids (18 to 20 percent), protein (6 to 7 percent), fibre (3 to 10 percent), and carbs (15 to 22 percent). According to the analysis's findings, coconut seed oil has a yield percentage of 20.11%, a pH of 5.03, a refractive index of 0.81, and a specific gravity of 0.97. 208.61 mg KOH/g of saponification value, Acid value of 4.207mgKOH, peroxide value of 33.20mgKOH/kg, and iodine value of 12.54gI/100g. Using the fundamental ingredients of moisturizer(s), emulsifier system, water, and preservative, body moisturising cream was created in the lab. The percentage yield, colour, specific gravity, and pH of the created cream were assessed and compared to commercial cream. Evaluation revealed that the manufactured cream met requirements and had acceptable moisturization. The body lotion made from coconut oil had a constant texture, showed little patch reactivity, and smelled well. \u0000Conclusion: Since coconut seed oil cream has superior quality than commercial body lotion, it can be utilised for cosmetic purposes.","PeriodicalId":251966,"journal":{"name":"Journal of Applied Chemical Science International","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114995941","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}

引用次数: 0

Analysis of the Industrial Effluent before Discharge into the sea, Case from Kamsar, Republic of Guinea 几内亚共和国卡姆萨尔工业废水入海前的分析

Journal of Applied Chemical Science International Pub Date : 2023-07-15 DOI: 10.56557/jacsi/2023/v14i28314

M. Sylla, A. Konaté

引用次数: 0

Estimation of Caffeine and Vitamin B-Complex (Vitamin B2, B3, B5 and B6) Constituents of Selected Energy Drinks 某些功能饮料中咖啡因和复合维生素b(维生素B2、B3、B5和B6)成分的评估

Journal of Applied Chemical Science International Pub Date : 2023-06-29 DOI: 10.56557/jacsi/2023/v14i18288

Ejimofor, Chiamaka Frances, N. Enoch, O. Johnson, Mbaukwu, Onyinye Ann, Afam-Ezeaku, Chikaodili Eziamaka

{"title":"Estimation of Caffeine and Vitamin B-Complex (Vitamin B2, B3, B5 and B6) Constituents of Selected Energy Drinks","authors":"Ejimofor, Chiamaka Frances, N. Enoch, O. Johnson, Mbaukwu, Onyinye Ann, Afam-Ezeaku, Chikaodili Eziamaka","doi":"10.56557/jacsi/2023/v14i18288","DOIUrl":"https://doi.org/10.56557/jacsi/2023/v14i18288","url":null,"abstract":"Vitamins are important nutrients that are contained in food and carry out distinct and important bodily tasks that are required for sustaining good health. A xanthine alkaloid known as caffeine is widely distributed in natural plant sources such as coffee, cocoa beans, cola nuts, and tea leaves. Additionally, it is a raw material in several drinks. Its usage increases blood pressure, diuresis, blood sugar, generation of stomach acid and pepsin, plasma levels of fatty acids, cortisol, and epinephrine, intraocular pressure, and calcium loss, which causes bone loss. The phrase \"energy drinks\" refers to beverages that advertise that they will give you an energy boost, which has led to an increase in the popularity of \"energy drinks\" that include caffeine. The caffeine and vitamin B-complex concentrations of a few different energy drinks were tested and compared in this study project. Samples of ten (10) different energy drink brands were chosen at random from Nkwo Ogbe Market in Ihiala, and their caffeine and vitamin B1, B2, B6, and B12 concentrations were determined using a spectrophotometric technique. The findings revealed that caffeine concentrations varied from 1.11 mg/L to 2.13 mg/L, and that vitamin B1 in energy drinks had the lowest value (0.014 mg/kg). All samples of energy drinks had caffeine levels below the 400 mg/L benchmark set by the National Agency for Food and Drug Administration and Control (NAFDAC). In order to avoid negative consequences, it is important to monitor any decrease in intake of these beverages because other criteria, such as aspartame and sugar, were also often below the established levels.","PeriodicalId":251966,"journal":{"name":"Journal of Applied Chemical Science International","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127970442","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}

引用次数: 0

Design and Development of an Integrated Plantain Processing Machine 一体式大蕉加工机的设计与研制

Journal of Applied Chemical Science International Pub Date : 2023-06-24 DOI: 10.56557/jacsi/2023/v14i18286

C. C. Chiabuotu, U. Opara, J. O. Azubuike, D. A. Ekpechi, B. Okonkwo, J. M. Nwangwa, A. Uzor

{"title":"Design and Development of an Integrated Plantain Processing Machine","authors":"C. C. Chiabuotu, U. Opara, J. O. Azubuike, D. A. Ekpechi, B. Okonkwo, J. M. Nwangwa, A. Uzor","doi":"10.56557/jacsi/2023/v14i18286","DOIUrl":"https://doi.org/10.56557/jacsi/2023/v14i18286","url":null,"abstract":"An integrated plantain processing machine has been designed and developed. The method of the design includes system design calculations, application of computer aided drawing (CAD), and fabrication using engineering tools and materials. Units like the frame is composed of mild steel material which provides support to the machine. The design was incorporated with temperature regulator or thermostat connected to the heating coil, which is set to regulate the temperature in the drying chamber. The performance evaluation was carried out by examining the out-turn of the moisture content of the plantain, rotor speed, and the drying temperature, on the machine drying chamber. The production efficiency of the machine was found to be 84.44%. In addition to drying and milling of plantain, the machine can also be adjusted to dry and pulverize other agricultural products such as; banana, yam, and other tubers among others as long as it can be sliced. Based on the results of the test obtained, the machine proved to be a better design, which the drying time of plantain can be varied from 28mins-1hr achieving several masses of plantain flour, unlike the conventional method of sun drying which takes far longer drying time. Moreover, it was observed that the time of drying is inversely proportional to the temperature, this means that the higher the temperature the faster the plantain dries. Also, the time of milling the dried plantain chips was about 5.8minutes for a total mass of 12 kg input. The integrated system has a throughput capacity of 37.75Kg/hr with total energy consumption of 0.00586KJ/Kg and was powered by a 3.7kw electric motor running at a speed of 1182 revolutions per minutes (rpm).","PeriodicalId":251966,"journal":{"name":"Journal of Applied Chemical Science International","volume":"92 4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126064452","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}

引用次数: 0

Simulation of Water Absorption of Epoxy Reinforced Composite Using Polynomial Model on MATLAB Environment 在MATLAB环境下用多项式模型模拟环氧增强复合材料的吸水率

Journal of Applied Chemical Science International Pub Date : 2023-06-03 DOI: 10.56557/jacsi/2023/v14i18259

D. A. Ekpechi, O. Obiukwu, B. Okonkwo, C. C. Chiabuotu, K. C. Chukwuemeka, U. Opara

{"title":"Simulation of Water Absorption of Epoxy Reinforced Composite Using Polynomial Model on MATLAB Environment","authors":"D. A. Ekpechi, O. Obiukwu, B. Okonkwo, C. C. Chiabuotu, K. C. Chukwuemeka, U. Opara","doi":"10.56557/jacsi/2023/v14i18259","DOIUrl":"https://doi.org/10.56557/jacsi/2023/v14i18259","url":null,"abstract":"Application of MATLAB software for water absorption test, which entails the rate by which a material diffuses and retain water molecule, on epoxy reinforced with coconut shell fiber (CSF), aluminum oxide (Al2O3), and silicon carbide (SiC) composites have been investigated. Five specimens (E, S1, S2, S3 and S4) were developed using compression molding on different percentage of fibers. The water absorption test was conducted using suitable American Society for Testing and Material (ASTM) which involves different water solutions. It was observed that sample ‘E’ shows maximum water absorption maybe due to absence of reinforced fibers. Specimen S1 indicated less water absorption, maybe due to presence of natural filler. Sample S4 shows trend on least water absorption, maybe due presence of higher percentage of natural synthetic fibers. Validation of the experiments using 2020 Commercial License Model MATLAB software, which were compared with the experimental result using the root mean square error (RMSE) statistical parameter and graph of point of intercept. The predicted data developed through the MATLAB software, established 95% confidence bounds on RMSE, which indicated 0.012 range of standard deviation between the experimental and simulation results, which avoids the under fitting and over fitting problem, also, when compared using a graph of point intercept, followed the same trend of result from the experiment.","PeriodicalId":251966,"journal":{"name":"Journal of Applied Chemical Science International","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129300510","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}

引用次数: 0

Hyperspectral Signatures and Volumetric Study of Iron Ore from Kemmanagudi, Bababudan Hill Ranges of Karnataka State, India 印度卡纳塔克邦Bababudan山脉Kemmanagudi铁矿石的高光谱特征和体积学研究

Journal of Applied Chemical Science International Pub Date : 2023-04-03 DOI: 10.56557/jacsi/2023/v14i18180

Abrar Ahmed, S. Khanum, M. Manjunatha, H. T. Basavarajappa

{"title":"Hyperspectral Signatures and Volumetric Study of Iron Ore from Kemmanagudi, Bababudan Hill Ranges of Karnataka State, India","authors":"Abrar Ahmed, S. Khanum, M. Manjunatha, H. T. Basavarajappa","doi":"10.56557/jacsi/2023/v14i18180","DOIUrl":"https://doi.org/10.56557/jacsi/2023/v14i18180","url":null,"abstract":"Iron is one among the oldest metals known to man and is quite rich in our country. 95% of the total iron reserves of India were accounted from few states such as Jharkhand, Orissa, Madhya Pradesh, Chhattisgarh, Karnataka and Goa. Kudremukha and Donimalai is known for producing high grades of iron in Karnataka state. The present study aims to analyze the spectral signatures and volumetric determinations of iron ore deposits which were well developed and was being mined in Kemmanagundi of Bababudan hills in Chikmagalur district. Field random samples were collected for laboratory work and analysis in determining the spectral signature curves and volumetric content. The spectral signatures of any mineral will discriminated based on their characteristics features of absorption and reflectance curves. Volumetric analysis is generally one of the quantitative methods that deal with determination of amount of particular elements in tested sample. As demand of iron in India is expected to increase day by day this deposit has to be considered as an important one for its rich iron content of 69.8 percent of iron content occurring around Kemmanagundi of Bababudanhill range, Chikmagalur district, Karnataka. The final results show the presence of rich iron content around the study area.","PeriodicalId":251966,"journal":{"name":"Journal of Applied Chemical Science International","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122939879","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}

引用次数: 0

DISTRIBUTION OF HEAVY METALS IN SOILS WITHIN THE VICINITY OF THE OYIGBO GAS FLARE SITE IN RIVER STATE, NIGERIA 尼日利亚河州oyigbo天然气火炬站点附近土壤中重金属的分布

Journal of Applied Chemical Science International Pub Date : 2022-10-25 DOI: 10.56557/jacsi/2022/v13i47906

O. Osagie, L. Osuji, A. I. Hart

{"title":"DISTRIBUTION OF HEAVY METALS IN SOILS WITHIN THE VICINITY OF THE OYIGBO GAS FLARE SITE IN RIVER STATE, NIGERIA","authors":"O. Osagie, L. Osuji, A. I. Hart","doi":"10.56557/jacsi/2022/v13i47906","DOIUrl":"https://doi.org/10.56557/jacsi/2022/v13i47906","url":null,"abstract":"Six heavy metals were determined in soils to assess the impact gas flaring had on the micronutrient status of the soils. Soils were collected from the gas flaring site at Oyigbo in Rivers State Nigeria at 10m, 50m and 100m distance to the flare stack, from surface and subsurface depths. The soils were analysed for heavy metals using GBC-Avanta PM SN A6600 Atomic Absorption Spectrophotometer (AAS). Alterations in the micronutrient levels measured evidently point to the impact of the Oyigbo gas flare. However, concentrations of all the heavy metals were found to be within the target benchmark limits of Nigeria’s Department of Petroleum Resources (DPR) and the World Health Organization (WHO), except for Cd which recorded a concentration of 0.34 0.08 mg/kg at 0-10cm depth, 100m away from the flare and 1.18 mg/kg at 10-20cm depth, 10m away from the flare; these 10m results exceeded the 0.8mg/kg limit of DPR and WHO. One way analysis of variance (ANOVA) showed that the differences in the concentrations of the other metals (Fe, Pb, Zn, Cr and Ni) were statistically significant (P<0.05); this was validated by a complimentary post-hoc analysis using the Turkey’s Multiple Comparison Test. The trend in the concentrations was Cr > Ni > Fe > Pb > Zn > Cd. A geographically similar control soils collected from Choba, a community outside the vicinity of the gas flaring, had significantly lower concentrations of metals. Given the tendency of heavy metals to bio-accumulate and bio-magnify, it is recommended that periodic human health risk assessment be carried out in the study area to ascertain the toxic potency of these metals to the agricultural community.","PeriodicalId":251966,"journal":{"name":"Journal of Applied Chemical Science International","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132110505","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}

引用次数: 0

HYDROCARBON PROFILE AND HEAVY METAL LEVELS OF EDE-ONYIMA LAKE IN OKARKI-ENGENNI, RIVERS STATE, NIGERIA 尼日利亚河流州okarki-engenni ede-onyima湖的碳氢化合物剖面和重金属水平

Journal of Applied Chemical Science International Pub Date : 2022-10-06 DOI: 10.56557/jacsi/2022/v13i47880

M. Essiene, L. Osuji, A. I. Hart, M. Onojake

{"title":"HYDROCARBON PROFILE AND HEAVY METAL LEVELS OF EDE-ONYIMA LAKE IN OKARKI-ENGENNI, RIVERS STATE, NIGERIA","authors":"M. Essiene, L. Osuji, A. I. Hart, M. Onojake","doi":"10.56557/jacsi/2022/v13i47880","DOIUrl":"https://doi.org/10.56557/jacsi/2022/v13i47880","url":null,"abstract":"Freshwater quality is deteriorating as a result of ongoing threats from both anthropogenic and natural sources, resulting in an overall loss of ecological integrity petroleum hydrocarbon profiles and heavy metals (Mg, Fe, Ni, Mn, Pb, Cd, Cu, Cr, and Zn) were determined in water samples collected at six sampling sites in Ede Onyima lake, Okarki-Engenni, Rivers State, Nigeria using gas chromatography, flame ionization detector, and Atomic Absorption Spectroscopy. Results showed that total petroleum hydrocarbon (TPH) varied from (0.27 -252.20 mg/L) with mean : 77.30 mg/L; Total hydrocarbon content (0.43 - 347.70 mg/L) with mean : 97.97 mg/L; Benzene, Toluene, and Xylene (9.00E-04- 6.60 mg/L) with mean : 0.11mg/L; polycyclic aromatic hydrocarbons (0.16- 3.51mg/L) with mean : 1.93mg/L. The heavy metal results showed Mg (1.11- 8.67mg/L) with mean : 2.87 mg/L; Fe (0.13 - 20.73mg/L) with mean : 7.29mg/L; Mn (0.001- 5.92 mg/L) with mean : 1.69 mg/L; Pb (0.06 - 0.06 mg/L) with mean : 0.06 mg/kg; Cu (6.33E-04- 0.31 mg/L) with mean : 0.07mg/L; Zn (9.90E-04- 0.38 mg/L) with mean : 0.08 mg/L; Ni (0.04 - 0.04 mg/L) with mean : 0.04 mg/L; Cd and Cr were less than 0.01 mg/L. The CWQI was used to capture the overall spatial and temporal trends in water quality in the Ede Onyima lake. The results showed that while PAHs and Fe exceeded guideline values and failed 100% of the time. The large magnitude of F3 is as a result of varying degrees of failure of Mn, Fe, THC, TPH, and PAHs, all of which exceeded regulatory thresholds by several magnitudes. Furthermore, the flood event had a significant effect on the quality of the water, remobilizing pollutants' availability while washing away legacy contaminated streambed deposits during baseflow.","PeriodicalId":251966,"journal":{"name":"Journal of Applied Chemical Science International","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122005118","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}

引用次数: 0

IMPORTANCE OF THE COLOR TEMPERATURE IN COLD WHITE LIGHT EMISSION OF Ca2MgSi2O7: Dy3+ PHOSPHOR 色温在Ca2MgSi2O7: Dy3+荧光粉冷白光发射中的重要性

Journal of Applied Chemical Science International Pub Date : 2022-07-21 DOI: 10.56557/jacsi/2022/v13i47769

Shashank Sharma, S. Dubey

{"title":"IMPORTANCE OF THE COLOR TEMPERATURE IN COLD WHITE LIGHT EMISSION OF Ca2MgSi2O7: Dy3+ PHOSPHOR","authors":"Shashank Sharma, S. Dubey","doi":"10.56557/jacsi/2022/v13i47769","DOIUrl":"https://doi.org/10.56557/jacsi/2022/v13i47769","url":null,"abstract":"A promising candidate of white light-emitting (Ca2MgSi2O7: Dy3+) phosphor was successfully synthesized via traditional high-temperature solid-state synthesis technique using boric acid (H3BO3) as a fuel. The synthesized material sample was characterized with the help of powder X-ray diffraction (PXRD), FT-IR (Fourier Transform Infra-red) Spectroscopy, FESEM (Field Emission Scanning Electron Microscopy) and PL (Photoluminescence) spectra. Using the Debye-Scherer formula and UDM method, the crystallite size and crystal lattice strain were evaluated, respectively. Photoluminescence (PL) properties (both excitation & emission spectra) for the prepared phosphor were systematically investigated in detail. Photoluminescence spectra were revealed that the strong transition of spectral emission lines centered at 484nm (blue), 578nm (yellow) and weak transition of spectral emission lines centered at 615nm (red) wavelength. These peaks were assigned to following transitions (4F9/2 → 6H15/2,13/2,11/2), which are responsible for the (f→f) transitions from the ground level (lower energy state) to excited level (higher energy state) in the 4f9electronic configuration of dopant [Dy3+] ions. CIE color chromaticity coordinates and Color Correlated Temperature (CCT) of synthesized Ca2MgSi2O7: Dy3+ phosphor sample is well suited for the generation of cold white light emission with a CIE coordinate value of (X = 0.31, Y = 0.32) and CCT value also calculated as 5167K. Here upon, it is highly applicable to be a novel hopeful phosphor for cold WLEDs.","PeriodicalId":251966,"journal":{"name":"Journal of Applied Chemical Science International","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128967835","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}

引用次数: 1