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Hao-Cheng Yang, Yunsong Xie, Henry Chan, Badri Narayanan, Lin Chen, Ruben Z Waldman, Subramanian K R S Sankaranarayanan, Jeffrey W Elam, Seth B Darling
Crude oil fouling on membrane surfaces is a persistent, crippling challenge in oil spill remediation and oilfield wastewater treatment. In this research, we present how a nano-sized oxide coating can profoundly affect the anti-crude-oil property of membrane materials. Select oxide coatings with a thickness of ~10 nm are deposited conformally on common polymer membrane surfaces by atomic layer deposition to significantly mitigate fouling during filtration processes. TiO2- and SnO2-coated membranes exhibited far greater anti-crude-oil performance than ZnO- and Al2O3-coated ones...
August 14, 2018: ACS Nano
Xiang Lv, Jun Li, Tian-Lu Men, Jiagang Wu, Xixiang Zhang, Ke Wang, Jing-Feng Li, Dingquan Xiao, Jianguo Zhu
Because of their high toxicity, lead-based materials in electronic devices must be replaced by lead-free piezoelectric materials. However, some issues remain that hinder the industrial applications of these alternative ceramics. Here, we report the construction of a 0-3-type ceramic composite (KNNS-BNKZ: xZnO), where the Sb-doped ZnO sub-micronic particles were randomly distributed throughout the potassium-sodium niobate-based ceramic matrix. In this KNN-based ceramic composite, superior temperature stability, excellent piezoelectric properties, and a high Curie temperature were simultaneously achieved...
August 14, 2018: ACS Applied Materials & Interfaces
Yayao Lan, Zhifeng Liu, Zhengang Guo, Xifei Li, Lei Zhao, Li Zhan, Min Zhang
It is known that heterojunction photoelectrodes can improve light absorption and accelerate the separation of photogenerated carriers in the field of photoelectrochemical (PEC) water splitting. However, the key to efficient photoelectrochemical performance is to build heterojunctions with a narrow band gap semiconductor loaded on a wide band gap semiconductor uniformly and densely. Herein, a ZnO/ZnFe2O4 uniform core-shell heterojunction photoelectrode is prepared by a simple ion etching method. Moreover, the chemical reaction process and mechanism are discussed in detail...
August 14, 2018: Dalton Transactions: An International Journal of Inorganic Chemistry
Kirubaveni Savarimuthu, Radha Sankararajan, Rajamanickam Govindaraj, Santhosh Narendhiran
Vibration based piezoelectric energy harvesting from unused ambient sources is an efficient approach for a battery-free, sustainable and green power source for self-powered electronics. This paper presents the performance enhancement of a p-n junction based flexible nano-generator (NG). A stable, non-hazardous spiro and zinc oxide (ZnO) p-n junction based NG is proposed. The device performance is compared with a Schottky contact based NG. The experimental study is carried out using the tip excitation method...
August 14, 2018: Nanoscale
Venkidasamy Baskar, Safia Nayeem, Sree Preethy Kuppuraj, Thiruvengadam Muthu, Sathishkumar Ramalingam
Nanoparticles (NPs) are widely used in various domestic products and their usage is constantly increasing which in turn can raise several environmental health issues. Like other abiotic stresses, nanomaterials also affect the growth of crop plants. Solanum melongena is a common vegetable crop grown in the tropics and subtropics regions with medicinal properties. In this study, S. melongena was analyzed for its response to three commercially important metallic nanoparticles, namely NiO, CuO, and ZnO, at four different concentrations (100, 250, 500 and 1000 mg/L)...
August 2018: 3 Biotech
Sake Wang, Hongyu Tian, Chongdan Ren, Jin Yu, Minglei Sun
The structural, electronic, and optical properties of heterostructures formed by transition metal dichalcogenides MX2 (M = Mo, W; X = S, Se) and graphene-like zinc oxide (ZnO) were investigated using first-principles calculations. The interlayer interaction in all heterostructures was characterized by van der Waals forces. Type-II band alignment occurs at the MoS2 /ZnO and WS2 /ZnO interfaces, together with the large built-in electric field across the interface, suggesting effective photogenerated-charge separation...
August 13, 2018: Scientific Reports
Mona Shaaban, Areej M El-Mahdy
Nanoparticles (NPs) are gaining special interest due to their recent applications as antimicrobial agents to defeat the massive threat of resistant pathogens. This study focused on the utilisation of Streptomyces isolate S12 purified from waste discharge soil in the biological synthesis of silver (Ag), selenium (Se), and zinc oxide (ZnO) NPs. The isolate S12 was related to Streptomyces enissocaesilis according to 16S rRNA sequence analysis, morphological characteristics, and biochemical reactions. The cell-free supernatant has been used for the synthesis of Ag, Se, and ZnO NPs...
September 2018: IET Nanobiotechnology
Tejaswi Thunugunta, Aswath Channa Reddy, Shivashankara Kodthalu Seetharamaiah, Laxman Ramanna Hunashikatti, Satisha Gowdra Chandrappa, Narayana Cherukatu Kalathil, Lakshmana Reddy Dhoranapalli Chinnappa Reddy
The increasing use of nanoparticles and their occurrence in the environment has made it imperative to elucidate their impact on the environment. Although several studies have advanced the authors' understanding of nanoparticle-plant interactions, their knowledge of the exposure of plants to nanoparticles and their effects on edible crop plants remain meager and is often paradoxical. The aim of this study was to increase their knowledge on the effect of zinc oxide (ZnO) nanoparticles on eggplant seed germination and seedling growth...
September 2018: IET Nanobiotechnology
Vimala Devi Subramaniam, Suhanya Veronica Prasad, Antara Banerjee, Madhumala Gopinath, Ramachandran Murugesan, Francesco Marotta, Xiao-Feng Sun, Surajit Pathak
In recent years, nanoparticles are being used extensively in personal healthcare products such as cosmetics, sunscreens, soaps, and shampoos. Particularly, metal oxide nanoparticles are gaining competence as key industrial constituents, progressing toward a remarkable rise in their applications. Zinc oxide and titanium oxide nanoparticles are the most commonly employed metal oxide nanoparticles in sunscreens, ointments, foot care, and over the counter topical products. Dermal exposure to these metal oxides predominantly occurs through explicit use of cosmetic products and airway exposure to nanoparticle dusts is primarily mediated via occupational exposure...
August 13, 2018: Drug and Chemical Toxicology
Dongfeng Shao, Qufu Wei
The cost and efficiency of preparing ZnO/Ag composite functional polyester membrane affect their application, for which a rapid microwave-assisted method was studied for coating ZnO/Ag composite nanoparticles on polyester nonwoven. The surface morphology, crystalline structure, and surface chemistry of the uncoated and coated polyester nonwoven was investigated by X-ray diffractometer (XRD), scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FT-IR), energy-dispersive spectroscopy (EDS), X-ray photoelectron spectroscopy (XPS), and thermogravimetric (TG), respectively...
August 11, 2018: Materials
Yangxiu Liu, Jin Jia, Yan Li, Jing Hao, Kai Pan
In recent years, Janus materials have become a research hotspot in the field of materials science, however fabricating inorganic Janus nanofibers (NFs) is still a challenge. Herein, we reported a novel ZnO/NiO Janus NFs with efficient photocatalytic performance via electrospinning method followed by calcination treatment. The morphology, structure, chemical composition, and crystallinity of ZnO/NiO Janus NFs were studied in detail via SEM, TEM, HRTEM, EDS, FT-IR, XPS and XRD, indicating that the NFs had perfect Janus structure composed of ZnO and NiO...
August 13, 2018: Nanotechnology
Hadi Beitollahi, Hadiseh Salimi, Mohammad Reza Ganjali
An electrode has been developed based on using a composite of hematoxylin/graphene/ZnO nanocomposite to modify a glassy carbon electrode (GCE). The electrode (HGGCE) was tested and found to be applicable for the voltammetric analysis of levodopa in the presence of vitamin B6 , theophylline and guaifenesin using a 0.1 M phosphate buffer solution (PBS) pH 7 as the solvent. The HGGCE was used as the working electrode in cyclic voltammetry (CV) and square wave voltammetry (SWV) studies on the electrochemical behavior of levodopa at its surface...
2018: Analytical Sciences: the International Journal of the Japan Society for Analytical Chemistry
Juanhong Wang, Chen Song, Zhiwei He, Chaohuang Mai, Gancheng Xie, Lan Mu, Yangke Cun, Jiali Li, Jian Wang, Junbiao Peng, Yong Cao
All-solution-processed pure formamidinium-based perovskite light-emitting diodes (PeLEDs) with record performance are successfully realized. It is found that the FAPbBr3 device is hole dominant. To achieve charge carrier balance, on the anode side, PEDOT:PSS 8000 is employed as the hole injection layer, replacing PEDOT:PSS 4083 to suppress the hole current. On the cathode side, the solution-processed ZnO nanoparticle (NP) is used as the electron injection layer in regular PeLEDs to improve the electron current...
August 12, 2018: Advanced Materials
Partha Kumbhakar, Ashim Pramanik, Subrata Biswas, Arup Kanti Kole, Rajat Sarkar, Pathik Kumbhakar
Recently, research activities are focused on development of 2D reduced graphene oxide (rGO) based semiconductor nanocomposite materials for boosting up its catalytic applications. In this work, a rarely reported green synthesis approach has been envisioned to synthesize in-situ 2D rGO-ZnO (rGZn) nanocomposites from Apple juice and zinc acetate. Also the composition of the samples has been optimized to achieve high photocatalytic and self-cleaning properties by the formation of reactive oxidation species. The samples are characterized for their microstructural, optical absorption and photoluminescence properties...
July 29, 2018: Journal of Hazardous Materials
Jian-Ai Quek, Sze-Mun Lam, Jin-Chung Sin, Abdul Rahman Mohamed
Flower-like ZnO micro/nanostructures were successfully fabricated via a surfactant-free co-precipitation method. The as-synthesized product was characterized using X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), energy dispersive X-ray (EDX), transmission electron microscopy (TEM), fourier transform infrared spectroscopy (FTIR), UV-vis diffuse reflectance spectroscopy (UV-vis DRS) and photoluminescence (PL) analyses. In the presence of visible light irradiation, the as-synthesized flower-like ZnO showed higher antibacterial activities against Enterococcus faecalis (E...
August 3, 2018: Journal of Photochemistry and Photobiology. B, Biology
Karuppasamy Prem Ananth, Jinxing Sun, Jiaming Bai
In this paper, the synthesis of porous manganese substituted hydroxyapatite (Mn-HAp) coating on zinc oxide (ZnO) coated stainless steel (316L SS) using the electrodeposition technique is reported. The structural, functional, morphological, and elemental analyses are characterized by various analytical techniques including X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), field emission scanning electron microscopy (FE-SEM), transmission electron microscopy (TEM), and X-ray photoelectron spectroscopy (XPS)...
August 9, 2018: International Journal of Molecular Sciences
Ajay Jose, K R Sunaja Devi, Dephan Pinheiro, S Lakshmi Narayana
The effect of surfactant and dopant on the properties of zinc oxide nanoparticles were studied by preparing polyethylene glycol (PEG) capped ZnO and tungsten doped PEG capped ZnO nanoparticles via the electrochemical method. These nanoparticles were characterized using X-Ray Diffraction (XRD), Fourier Transform Infrared Spectroscopy (FTIR), Ultraviolet Diffuse Reflection Spectroscopy (UV-DRS), Scanning Electron Microscopy (SEM) and Electron Dispersive Analysis of X Rays (EDAX). The photocatalytic degradation of malachite green dye using these nanoparticles was studied under visible light...
August 2, 2018: Journal of Photochemistry and Photobiology. B, Biology
Fanpeng Meng, Yazi Liu, Jun Wang, Xiaoyao Tan, Hongqi Sun, Shaomin Liu, Shaobin Wang
Photocatalysis has been believed as one of the green and sustainable avenues to address energy and environmental crises by converting solar energy to chemical energy via reactions. Temperature is usually a vital factor controlling kinetics and thermodynamics of a reaction, but it has been less investigated in photocatalysis. In this work, the effect of reaction temperature on photocatalysis was investigated in a simple process, photocatalytic degradation of Congo Red (CR) on three typical catalysts, g-C3 N4 , TiO2 and ZnO, to differentiate the interfacial radical generation and reaction mechanism...
July 31, 2018: Journal of Colloid and Interface Science
Jalil Javedani Bafekr, Razieh Jalal
The development of antibiotic resistance among hospital pathogens has provided a great need for new antimicrobial agents. Zinc oxide nanoparticles (ZnO NPs) in combination with various antibiotics can act as a reducing agent for antibiotic resistance. The aim of this study was to investigate the influence and the mechanism of ZnO NPs on the antimicrobial activity of ciprofloxacin (CP) and ceftazidime (CAZ) against Enterococcus faecalis ( E. faecalis ) and Acinetobacter baumannii ( A. baumannii ) bacteria in acidic conditions (pH 5...
August 2018: IET Nanobiotechnology
Saher Nazir, Mehreen Zaka, Muhammad Adil, Bilal Haider Abbasi, Christophe Hano
Currently, the evolution of green chemistry in the synthesis of nanoparticles (NPs) with the usage of plants has captivated a great response. In this study, in vitro plantlets and callus of Silybum marianum were exploited as a stabilising agent for the synthesis of zinc oxide (ZnO) NPs using zinc acetate and sodium hydroxide as a substitute for chemical method. The contemporary investigation defines the synthesis of ZnO NPs prepared by chemical and bio-extract-assisted methods. Characterisation techniques such as X-ray diffraction, scanning electron microscopy, Fourier transform infrared spectroscopy and energy dispersive X-ray were used to confirm the synthesis...
August 2018: IET Nanobiotechnology
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