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Modification of Interfacial Properties of Organic Device in Presence of Single Walled Carbon Nanotubes 单壁碳纳米管对有机器件界面性能的修饰
Q3 Engineering Pub Date : 2022-01-01 DOI: 10.52687/2348-8956/915
Sudipta Sen, Pallabi Das, N. Manik
Device performance gets significantly affected by the interfacial properties Schottky barrier and width of space – charge region have been estimated without and with SWCNT. Rose Bengal dye has been sandwiched in between Indium Tin Oxide (ITO) coated glass substrate and Aluminium. Schottky barrier is estimated by perusing steady state current has also been considered to calculate the effective barrier in presence of externally applied electric field. Space- charge region width is interrelated to the both Schot be inferred that by incorporating SWCNT, schottky barrier and space which will improve the current flow. Current flow improvement in presence of SWCNT can also be ascribed to the lowering of energy of traps which has also been determined in this work. Device performance gets significantly affected by the interfacial properties of the device. In this work, charge region have been estimated without and with SWCNT. Rose Bengal dye has been sandwiched in between Indium Tin Oxide (ITO) coated glass substrate and Aluminium. imated by perusing steady state current – voltage plot. Image barrier lowering effect has also been considered to calculate the effective barrier in presence of externally applied electric field. charge region width is interrelated to the both Schottky barrier and the applied electric field. It can be inferred that by incorporating SWCNT, schottky barrier and space- charge region width get reduced which will improve the current flow. Current flow improvement in presence of SWCNT can also be ascribed to the lowering of energy of traps which has also been determined in this work. considered to calculate the effective barrier in presence of electric tky barrier and the applied electric field. It can charge region width get reduced which will improve the current flow. Current flow improvement in presence of SWCNT can also be ascribed
计算了无碳纳米管和有碳纳米管时的肖特基势垒和空间电荷区宽度对器件性能有显著影响。玫瑰孟加拉染料被夹在氧化铟锡(ITO)涂层玻璃基片和铝之间。肖特基势垒是通过稳态电流来估计的,也被认为是计算外加电场存在时的有效势垒。空间-电荷区宽度与肖特都是相关的,可以推断,通过加入swcnts,肖特基势垒和空间将改善电流的流动。在swcnts的存在下,电流的改善也可以归因于陷阱能量的降低,这也是在这项工作中确定的。设备的接口特性对设备的性能影响很大。在这项工作中,估计了没有和有swcnts的电荷区域。玫瑰孟加拉染料被夹在氧化铟锡(ITO)涂层玻璃基片和铝之间。通过阅读稳态电流电压图来模拟。为了计算外加电场作用下的有效势垒,还考虑了像垒降低效应。电荷区宽度与肖特基势垒和外加电场有关。可以推断,加入swcnts可以减小肖特基势垒和空间电荷区宽度,从而改善电流流动。在swcnts的存在下,电流的改善也可以归因于陷阱能量的降低,这也是在这项工作中确定的。考虑了在存在电势垒和外加电场的情况下计算有效势垒。它可以减小电荷区宽度,从而改善电流。在swcnts的存在下,电流的改善也可以归因于此
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引用次数: 0
Synthesis, Characterization and Conductance Properties of Cobalt Chloride Doped Polyvinyl Alcohol / Polythiophene (PVA-Co-Pth) Nanocomposite Films 氯化钴掺杂聚乙烯醇/聚噻吩(PVA-Co-Pth)纳米复合膜的合成、表征及电导性能
Q3 Engineering Pub Date : 2022-01-01 DOI: 10.52687/2348-8956/912
A. Patil, N. Patil
Polyvinylalcohol-Co-polythiophene (PVA-Co-PTh) composite polymer films were produced by chemical polymerization. Cobalt chloride CoCl2.6H2O was applied on various levels as doping (0.2, 0.4, 0.6 and 0.8g). The produced films were characterized by TEM (transmission electron microscopy), UVVisible spectroscopy, IR (Infra red spectroscopy), SEM (scanning electron microscope), XRD (Xray diffraction), d.c electrical conductivity, and dielectric constant measurements. The optical properties of all investigated films were analyzed, when the optical absorption of the prepared films reduces with raising the amount of CoCl2.6H2O in UV (200–400nm) & VIS (500–700nm) regions. It is evident from the XRD patterns of the PVA-Co-PTh samples that the intensity of the peaks of diffraction rises with the rise in cobalt chloride content owing to the semi crystalline of the resulting Co (II) doped PVA/PTh compositions. These findings are comparable with morphological variations seen in the PVA-Co-PTh samples, as per the TEM and SEM analysis. The increase in conductivity with increase in Co (II) concentration up to 0.8g of CoCl26H2O has been observed in PVA-Co-PPy composites and the dielectric constant tends to increase with the increment infrequency as well as with enhancement in Co (II) composition. ARTICLE HISTORY Received 26-06-2021 Revised 01-12-2021 Accepted 03-12-2021 Published 12-01-2022
采用化学聚合法制备了聚乙烯醇-共聚噻吩(PVA-Co-PTh)复合聚合物薄膜。使用不同浓度的氯化钴CoCl2.6H2O作为掺杂剂(0.2、0.4、0.6和0.8g)。采用透射电子显微镜(TEM)、紫外可见光谱(UVVisible spectroscopy)、红外光谱(IR)、扫描电子显微镜(SEM)、x射线衍射(XRD)、直流电导率和介电常数测量等方法对制备的薄膜进行了表征。在UV (200-400nm)和VIS (500-700nm)区域,随着CoCl2.6H2O用量的增加,所制备薄膜的光吸收降低。从PVA-Co-PTh样品的XRD谱图可以看出,由于Co (II)掺杂PVA/PTh成分呈半晶状,因此随着氯化钴含量的增加,衍射峰的强度也随之增加。根据TEM和SEM分析,这些发现与PVA-Co-PTh样品的形态变化相似。当CoCl26H2O浓度达到0.8g时,PVA-Co-PPy复合材料的电导率随Co (II)浓度的增加而增加,且介电常数随Co (II)含量的增加而增加。收稿26-06-2021修回01-12-2021验收03-12-2021发布12-01-2022
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引用次数: 1
Synthesis and studies of optical properties of Eu3+ doped Gd2O3 phosphor prepared via hydrothermal process 水热法制备Eu3+掺杂Gd2O3荧光粉的合成及光学性能研究
Q3 Engineering Pub Date : 2022-01-01 DOI: 10.52687/2348-8956/918
Premananda Naorem Singh, W. R. Singh ·, N. Singh
Eu 3+ ion doped Gd 2 O 3 phosphors with varying concentrations were synthesized successfully by hydrothermal process. The XRD pattern of prepared samples was in good agreement with cubic system of pure Gd 2 O 3 (JCPDS No. 86-2477) with no extra phase. The TEM and HRTEM images also revealed the prepared samples are highly crystalline nanorods having the diameter in the range of 20 – 30 nm with different length. Vibrational modes are also studied using FT-IR Spectroscopy. Upon the emission at λ em = 612 nm, a broad absorption band observed around at 220 – 300 nm is due to overlap of O 2- to Eu 3+ charge transfer (CT) band, Gd 3+ to Eu 3+ CT band and host lattice absorption band and other weak bands observed at longer wavelength regions are attributed to the f-f transitions of the Eu 3+ ions. In the emission spectrum obtained by excitations at 258 nm, consists of the characteristic transition lines between Eu 3+ levels. The emission spectrum was dominated by the red 5 D 0  7 F 1 (612 nm) transition of the Eu 3+ ion which is an electric-dipole allowed transition and hypersensitive to the environment. The photoluminescence lifetime of the prepared samples are found to be 2.88 – 1.24 ms ranges.
采用水热法制备了不同浓度的Eu 3+离子掺杂g2o3荧光粉。制备的样品的XRD谱图与无多余相的纯gd2o3 (JCPDS 86-2477)的立方体系吻合良好。TEM和HRTEM图像也显示制备的样品是高度结晶的纳米棒,直径在20 ~ 30 nm之间,长度不同。振动模式也用傅里叶红外光谱进行了研究。在λ em = 612 nm处发射时,在220 ~ 300 nm处观察到的较宽吸收带是由于o2 -到Eu 3+的电荷转移(CT)带重叠,Gd - 3+到Eu 3+的CT带和宿主晶格吸收带重叠,而在较长波长区域观察到的其他较弱的吸收带是由于Eu 3+离子的f-f跃迁。在258 nm激发得到的发射光谱中,由Eu 3+能级之间的特征跃迁线组成。发射光谱主要是Eu 3+离子的红色5d0 / 7f1 (612 nm)跃迁,这是一种允许电偶极子跃迁,对环境超敏感。制备的样品的光致发光寿命为2.88 ~ 1.24 ms。
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引用次数: 0
Co-Precipitation Mediated Fabrication of Composite with Mns2 and Reduced Graphene Oxide as Potential for Inactivation of Ortho-Nitrophenol and Pathogens Mns2和还原氧化石墨烯共沉淀介导的复合材料对邻硝基苯酚和病原体失活的潜在影响
Q3 Engineering Pub Date : 2022-01-01 DOI: 10.52687/2348-8956/917
D. Varaprasada, B. S. Mohanb, D. Ramadevi, K. Basavaiaha, P. Vani
In this paper, the authors have report the fabrication of MnS 2 with reduced graphene oxide (MnS 2 -RGO) composite through co-precipitation route. The prepared samples were characterized by analytical instruments like XPS, FTIR, XRD, BET, SEM-EDX, TEM, UV-DRS and TGA for understanding the optical, electrochemical, structural and thermal properties. The prepared composites and bare MnS 2 were examined for their photocatalytic performance by the degradation of o -nitrophenols under visible light irradiations. However, MnS 2 -RGO-2 composite was the most effective photocatalyst for the degradation of o -nitrophenols in 75 min and can be recycled for continuous five cycles. The MnS 2 -RGO composites and bare MnS 2 were further examined their antimicrobial activity over E.coli, S.aureus, S.typhi and V.cholera . In addition, the effect of RGO on enhanced catalytic degradation of o -nitrophenols under visible light irradiations and antibacterial activity as prepared composite exhibits tremendous properties of both MnS 2 and RGO.
本文报道了用共沉淀法制备还原性氧化石墨烯(MnS 2 -RGO)复合材料的方法。利用XPS、FTIR、XRD、BET、SEM-EDX、TEM、UV-DRS和TGA等分析仪器对制备的样品进行表征,了解其光学、电化学、结构和热性能。在可见光照射下,考察了制备的复合材料和裸mns2对邻硝基酚的光催化性能。而mns2 -RGO-2复合光催化剂在75 min内对邻硝基苯酚的降解效果最好,可连续循环5次。进一步研究了MnS 2 -RGO复合物和裸MnS 2对大肠杆菌、金黄色葡萄球菌、伤寒沙门氏菌和霍乱弧菌的抑菌活性。此外,RGO在可见光照射下对o -硝基酚的催化降解和抗菌活性的增强作用表明,制备的复合材料具有mns2和RGO的双重特性。
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引用次数: 1
Performance Prediction of Braced Unreinforced and Strengthened Clay Brick Masonry Walls under Close-range Explosion through Numerical Modeling 用数值模拟方法预测近距离爆炸作用下支撑、加固粘土砖砌体墙体的性能
Q3 Engineering Pub Date : 2022-01-01 DOI: 10.1504/ijcmsse.2022.10051496
M. Umair, M. Alam, S. Anas
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引用次数: 7
Topological data analysis and Comparison of physical parameters of different forms of Graphene 拓扑数据分析及不同形态石墨烯的物理参数比较
Q3 Engineering Pub Date : 2022-01-01 DOI: 10.1504/ijcmsse.2022.10052084
S. R, Navya Jose, K. J, Mahesh Kumar
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引用次数: 0
NiO-FeS2 Heterostructure Composite: Benign Photocatalyst for Reduction of Nitrophenol to Aminophenol NiO-FeS2异质结构复合材料:硝基苯酚还原为氨基苯酚的良性光催化剂
Q3 Engineering Pub Date : 2022-01-01 DOI: 10.52687/2348-8956/916
Allu Ganga Raju, Gandham Himabindu, Yagati Vamsi Kumar
Aromatic nitro compounds have been promising industrial applications including paper production, pigments, pharmaceuticals, dyes, wood, leather, petrochemical, pesticides, insecticides, fungicides, explosives, and preservatives. US EPA (Environmental Protection Agency) declared that 4‑nitrophenol (4‑ NP) has been recognized as a non‑biodegradable pollutant and therefore, a very important to develop an effective method to either modify or remove 4‑NP before releasing it into the environment. In that concern, we have developed an efficient, heterostructure composite of NiO‑FeS 2 via hydrothermal. The 4 mg catalyst dose and 10 mg/L concentration of 4‑NP are the optimum conditions for complete reduction of 4‑NP to 4‑ AP by prepared NiO‑FeS 2 composite.
芳香族硝基化合物在造纸、颜料、制药、染料、木材、皮革、石油化工、农药、杀虫剂、杀菌剂、炸药和防腐剂等工业领域有着广阔的应用前景。美国环保署(EPA)宣布,4 -硝基酚(4 - NP)已被认定为不可生物降解的污染物,因此,在4 - NP释放到环境之前,开发一种有效的方法来修饰或去除4 - NP是非常重要的。在这方面,我们通过水热开发了一种高效的异质结构NiO‑FeS 2复合材料。催化剂剂量为4 mg, 4‑NP浓度为10 mg/L是制备的NiO‑FeS - 2复合材料将4‑NP完全还原为4‑AP的最佳条件。
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引用次数: 0
Reclaim of Synthetic Rutile Fines Produced In Ilmenite Beneficiation Process by Agglomeration 钛铁矿选矿过程中合成金红石细粒的团聚回收
Q3 Engineering Pub Date : 2022-01-01 DOI: 10.52687/2348-8956/913
G. Lijith, I. K. Shaju, P. K. Manikuttan
The synthetic rutile is used as feed stock material for producing rutile TiO2 under chloride route method. The synthetic rutile suitable for chlorination process under fluidized bed reactor was having a specification of TiO2 content above 90 %, silica content less than 2 %, and particle above 100 micron in size. One of the steps in the up-gradation process of ilmenite was leaching with mineral acids. The leach liquor obtained after leaching process is called spent acid. During leaching process, aberration leads to produce ultra fine particles of synthetic rutile which is found suspended in spent acid. A few amount of TiO2 was digested in acid to form hydrated TiO2. The spent acid contains both these ultra fine particles and hydrated TiO2 particles which were allowed to settled and removed from the system as TiO2 sludge. In addition to TiO2 sludge, a small quantity (0.5 0.7 %) of synthetic rutile having particle size less than 100 micron (required specification) were also generated, which is removed by using cyclone and stored as synthetic rutile fines. The quantity of synthetic rutile fines and TiO2 sludge produced are 1.0 MT and 3.0 MT respectively in a production plant having the synthetic rutile production capacity of 140 MT/day. The present invention aims to recover and re-use the synthetic rutile fines and TiO2 sludge generated in the ilmenite beneficiation plant by agglomeration technique. ARTICLE HISTORY Received 13-12-2021 Revised 18-12-2021 Accepted 22-12-2021 Published 12-01-2022
以合成的金红石为原料,采用氯化法生产金红石型TiO2。适于流化床反应器氯化工艺的合成金红石,其规格为TiO2含量≥90%,二氧化硅含量≤2%,粒径≥100微米。钛铁矿提品位的一个重要步骤是矿酸浸出。浸出后得到的浸出液称为废酸。在浸出过程中,畸变导致合成金红石的超细颗粒悬浮在废酸中。少量TiO2在酸中被消化形成水合TiO2。废酸含有超细颗粒和水合TiO2颗粒,这些颗粒被允许沉淀并作为TiO2污泥从系统中去除。除了TiO2污泥外,还生成了少量(0.5 - 0.7%)粒径小于100微米(要求规格)的合成金红石,通过旋风分离器将其除去并作为合成金红石粉储存。在一个合成金红石生产能力为140 MT/d的生产装置中,合成金红石粉和TiO2污泥的产量分别为1.0 MT和3.0 MT。本发明旨在对钛铁矿选矿厂生产的合成金红石粉和TiO2污泥进行团聚回收再利用。收稿13-12-2021修回18-12-2021接受22-12-2021发布12-01-2022
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引用次数: 0
Performance Enhancement of Square Reinforced Concrete Column Carrying Axial Compression by (1) C-FRP Wrapping, and (2) Steel Angle System under Air-blast Loading (1) C-FRP包覆和(2)钢角钢体系对风荷载下轴压方形钢筋混凝土柱性能的提高
Q3 Engineering Pub Date : 2022-01-01 DOI: 10.1504/ijcmsse.2022.10051781
A. Hussain, N. Islam, S. Anas, M. Alam, M. Shariq
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引用次数: 1
Prioritisation of self-curing self-compacting mortars with hydrophilic chemicals using MCDM techniques 采用MCDM技术优选亲水化学品自养护自密实砂浆
Q3 Engineering Pub Date : 2022-01-01 DOI: 10.1504/ijcmsse.2022.125762
Degloorkar Nikhil Kumar, Pancharathi Rathish Kumar, S. Reddi, Sri Rama Chand Madduru
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引用次数: 0
期刊
International Journal of Computational Materials Science and Surface Engineering
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