keyword
MENU ▼
Read by QxMD icon Read
search

photocatalyst

keyword
https://www.readbyqxmd.com/read/28730203/growth-study-of-hierarchical-ag3po4-laco3oh-heterostructures-and-their-efficient-photocatalytic-activity-for-rhb-degradation
#1
Virendrakumar G Deonikar, Santosh S Patil, Mohaseen S Tamboli, Jalindar D Ambekar, Milind V Kulkarni, Rajendra P Panmand, Govind G Umarji, Manish D Shinde, Sunit B Rane, Nagegownivari R Munirathnam, Deepak R Patil, Bharat B Kale
We have demonstrated the synthesis of Ag3PO4/LaCO3OH (APO/LCO) heterostructured photocatalysts by an in situ wet chemical method. From pre-screening evaluations of photocatalysts with APO/(x wt% LCO) composites with mass ratios of x = 5, 10, 15, 20, 25 and 30 wt%, we found that the APO/LCO (20 wt%) exhibited a superior photocatalytic activity for organic pollutant remediation. Therefore, an optimised photocatalyst APO/LCO (20 wt%) is selected for the present study and we investigate the effect of a mixed solvent system (H2O:THF) on the morphology, which has a direct effect on the photocatalytic performance...
July 21, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28728034/construction-of-novel-wo3-snnb2o6-hybrid-nanosheet-heterojunctions-as-efficient-z-scheme-photocatalysts-for-pollutant-degradation
#2
Xiaodong Ma, Wanxia Ma, Deli Jiang, Di Li, Suci Meng, Min Chen
The artificially Z-scheme heterojunctions between WO3 nanosheet and SnNb2O6 nanosheet with strongly coupled heterointerfaces were successfully constructed via a simple hydrothermal coassembly method. Transmission electron microscopy (TEM) and high-resolution TEM proved that an intimate contact interface was formed. The synthesized heterojunctions exhibites enhanced photodegradation efficiency for Rhodamine B under irradiation of visible light, and the highest reaction rate over 30%-WO3/SnNb2O6 nanosheet heterojunctions is about 4...
July 5, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28728028/direct-evidence-of-the-photocatalytic-generation-of-reactive-oxygen-species-ros-in-a-bi2w2o9-layered-structure
#3
S Obregón, M A Ruíz-Gómez, D B Hernández-Uresti
In the present work, the Bi2W2O9 photocatalyst has been prepared by an easy and prompt co-precipitation route. From the structural characterization, we have stated that the formation of the Bi2W2O9 is accompanied by a small amount of the Bi2WO6 oxide, which gradually decreases by increasing the calcination temperature. The conduction and valence band edges of the Bi2W2O9 semiconductor were experimentally estimated for the first time using the X-ray photoelectron (XPS) and diffuse reflectance (DRS) spectroscopies...
July 8, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28726671/in-situ-decoration-of-plasmonic-au-nanoparticles-on-graphene-quantum-dots-graphitic-carbon-nitride-hybrid-and-evaluation-of-its-visible-light-photocatalytic-performance
#4
Biswajit Choudhury, Pravat Kumar Giri, Rajender Gone
This work spotlights the development of a plasmonic photocatalyst showing surface plasmon induced enhanced visible light photocatalytic performance. Plasmonic Au nanoparticles (NPs) are decorated over the hybrid nanosystem of graphitic carbon nitride (GCN) and graphene quantum dots (GQD) by citrate reduction method. Surface plasmon resonance (SPR) induced enhancement of Raman G and 2D band intensity is encountered on excitation of the Plasmonic hybrid at 514.5 nm, which is near to the 532 nm absorption band of Au nanoparticles...
July 20, 2017: Nanotechnology
https://www.readbyqxmd.com/read/28725895/co-doped-zn1-xcdxs-nanocrystals-from-metal-organic-framework-precursors-porous-microstructure-and-efficient-photocatalytic-hydrogen-evolution
#5
Xiu Tang, Jia-Hui Zhao, Yu-Han Li, Zi-Ji Zhou, Kui Li, Fu-Tian Liu, Ya-Qian Lan
Nanoporous Co-doped Zn1-xCdxS were facilely fabricated via adopting ZIFs as templates, and Cd(NO3)2 and thiourea as precursors. The highly porous microstructure and uniform Co-doping of the photocatalyst afford a high H2-production rate (45.2 and 422.2 times larger than those of Zn0.5Cd0.5S and CdS), providing an effective way for the development of high performance nanoporous photocatalysts.
July 20, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28719847/high-photocatalytic-activity-of-hierarchical-sio2-c-doped-tio2-hollow-spheres-in-uv-and-visible-light-towards-degradation-of-rhodamine-b
#6
Ying Zhang, Juanrong Chen, Li Hua, Songjun Li, Xuanxuan Zhang, Weichen Sheng, Shunsheng Cao
Ongoing research activities are targeted to explore high photocatalytic activity of TiO2-based photocatalysts for the degradation of environmental contaminants under UV and visible light irradiation. In this work, we devise a facile, cost-effective technique to in situ synthesize hierarchical SiO2@C-doped TiO2 (SCT) hollow spheres for the first time. This strategy mainly contains the preparation of monodisperse cationic polystyrene spheres (CPS), sequential deposition of inner SiO2, the preparation of the sandwich-like CPS@SiO2@CPS particles, and formation of outer TiO2...
July 10, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28719846/preparation-characterization-and-application-of-tio2-patterned-polyimide-film-as-a-photocatalyst-for-oxidation-of-organic-contaminants
#7
Subramaniyan Ramasundaram, Mingizem Gashaw Seid, Wonseop Lee, Chan Ul Kim, Eun-Ju Kim, Seok Won Hong, Kyoung Jin Choi
Photocatalytically active TiO2-patterned polyimide (PI) films (PI-TiO2) were fabricated using thermal transfer patterning (TTP). When subjected to hot pressing, the TiO2 nanoparticles electrosprayed on steel mesh templates were successfully transferred and formed checker plate patterns on PI film. FE-SEM studies confirmed that pressing at 350°C and 100MPa was optimum for obtaining patterns with uniform TiO2 coverage. When the quantity of TiO2 on the template increased, the amount of it immobilized on PI film also increased from 0...
June 29, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28719176/investigation-on-the-electrocatalytic-determination-and-photocatalytic-degradation-of-neurotoxicity-drug-clioquinol-by-sn-moo4-2-nanoplates
#8
Raj Karthik, Jeyaraj Vinoth Kumar, Shen-Ming Chen, Kumar Seerangan, Chelladurai Karuppiah, Tse Wei Chen, Velluchamy Muthuraj
Transition metal molybdates have concerned enormous curiosity as supercapacitors, photocatalysts and electrocatalysts. These materials are best alternative to noble metal based catalysts which are generally show a limited photocatalytic and electrocatalytic activity. As well, the anti-protozoal drug can usually pollute the environment through improper disposable/incomplete metabolism and it is very dangerous to the human as well as aquatic animals. Therefore, here, we have studied the electrochemical determination and photodegradation of neurotoxicity clioquinol (CQL) drug by nanoplates-like tin molybdate (Sn(MoO4)2; denoted as SnM), which is played as both electro and photocatalyst...
July 18, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28719067/one-pot-synthesis-of-cu-nanoclusters-decorated-brookite-tio2-quasi-nanocubes-for-enhanced-activity-and-selectivity-of-co2-photoreduction-to-ch4
#9
Tianyou Peng, Jingpeng Jin, Jiang Luo, Lin Zan
A new kind of metallic Cu-loaded brookite TiO2 composite, in which Cu nanoclusters with small size of 1-3 nm are decorated on brookite TiO2 quasi nanocubes (BTN) surfaces (hereafter referred as Cu-BTN), is synthesized via a one-pot hydrothermal process, and then used as photocatalyst for CO2 reduction. It was found that the decoration of Cu nanoclusters on BTN surfaces can improve the activity and selectivity of CO2 photoreduction to CH4 production, and 1.5% Cu-BTN gives the maximum overall photocatalytic activity (150...
July 18, 2017: Chemphyschem: a European Journal of Chemical Physics and Physical Chemistry
https://www.readbyqxmd.com/read/28715879/high-photocatalytic-performance-of-two-types-of-graphene-modified-tio2-composite-photocatalysts
#10
Jun Zhang, Sen Li, Bo Tang, Zhengwei Wang, Guojian Ji, Weiqiu Huang, Jinping Wang
High quality and naturally continuous structure of three-dimensional graphene network (3DGN) endow it a promising candidate to modify TiO2. Although the resulting composite photocatalysts display outstanding performances, the lacking of active sites of the 3DGN not only goes against a close contact between the graphene basal plane and TiO2 nanoparticles (weaken electron transport ability) but also limits the efficient adsorption of pollutant molecules. Similar with surface functional groups of the reduced graphene oxide (RGO) nanosheets, surface defects of the 3DGN can act as the adsorption sites...
December 2017: Nanoscale Research Letters
https://www.readbyqxmd.com/read/28715751/sepiolite-nanoplatform-for-the-simultaneous-assembly-of-magnetite-and-zinc-oxide-nanoparticles-as-photocatalyst-for-improving-removal-of-organic-pollutants
#11
M Akkari, P Aranda, A Mayoral, M García-Hernández, A Ben Haj Amara, E Ruiz-Hitzky
Novel ternary ZnO/Fe3O4-sepiolite nanostructured materials were developed in a two-step procedure based on the incorporation of ZnO nanoparticles on a substrate composed by magnetite nanoparticles previously assembled to the sepiolite fibrous silicate (Fe3O4-sepiolite). The structural and morphological characterization shows that both, ZnO and Fe3O4 nanoparticles, were homogeneously dispersed on the surface of sepiolite. Therefore, the resulting material is characterized as a multifunctional nanoplatform simultaneously providing magnetic and photoactive properties...
June 29, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28715384/the-effect-of-interfacial-chemical-bonding-in-tio2-sio2-composites-on-their-photocatalytic-nox-abatement-performance
#12
Amer Hakki, Lu Yang, Fazhou Wang, Donald E Macphee
The chemical bonding of particulate photocatalysts to supporting material surfaces is of great importance in engineering more efficient and practical photocatalytic structures. However, the influence of such chemical bonding on the optical and surface properties of the photocatalyst and thus its photocatalytic activity/reaction selectivity behavior has not been systematically studied. In this investigation, TiO2 has been supported on the surface of SiO2 by means of two different methods: (i) by the in situ formation of TiO2 in the presence of sand quartz via a sol-gel method employing tetrabutyl orthotitanium (TBOT); and (ii) by binding the commercial TiO2 powder to quartz on a surface silica gel layer formed from the reaction of quartz with tetraethylorthosilicate (TEOS)...
July 4, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28715091/strongly-enhanced-photovoltaic-performance-and-defect-physics-of-air-stable-bismuth-oxyiodide-bioi
#13
Robert L Z Hoye, Lana C Lee, Rachel C Kurchin, Tahmida N Huq, Kelvin H L Zhang, Melany Sponseller, Lea Nienhaus, Riley E Brandt, Joel Jean, James Alexander Polizzotti, Ahmed Kursumović, Moungi G Bawendi, Vladimir Bulović, Vladan Stevanović, Tonio Buonassisi, Judith L MacManus-Driscoll
Bismuth-based compounds have recently gained increasing attention as potentially nontoxic and defect-tolerant solar absorbers. However, many of the new materials recently investigated show limited photovoltaic performance. Herein, one such compound is explored in detail through theory and experiment: bismuth oxyiodide (BiOI). BiOI thin films are grown by chemical vapor transport and found to maintain the same tetragonal phase in ambient air for at least 197 d. The computations suggest BiOI to be tolerant to antisite and vacancy defects...
July 17, 2017: Advanced Materials
https://www.readbyqxmd.com/read/28712297/photocatalytic-conversion-of-nitrogen-to-ammonia-with-water-on-surface-oxygen-vacancies-of-titanium-dioxide
#14
Hiroaki Hirakawa, Masaki Hashimoto, Yasuhiro Shiraishi, Takayuki Hirai
Ammonia (NH3) is an essential chemical in modern society. It is currently manufactured by the Haber-Bosch process using H2 and N2 under extremely high pressure (>200 bar) and high temperature (>673 K) conditions. Photocatalytic NH3 production from water and N2 at atmospheric pressure and room temperature is ideal. Several semiconductor photocatalysts have been proposed, but all suffer from low efficiency. Here we report that a commercially-available TiO2 with a large number of surface oxygen vacancies, when photoirradiated by UV light in pure water with N2, successfully produces NH3...
July 17, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28711827/efficient-photocatalytic-degradation-of-tetrabromodiphenyl-ethers-and-simultaneous-hydrogen-production-by-tio2-cu2o-composite-films-in-n2-atmosphere-influencing-factors-kinetics-and-mechanism
#15
Zhe Hu, Xi Wang, Haitai Dong, Shangyi Li, Xukai Li, Laisheng Li
TiO2-Cu2O photocatalyst composite film with a heterostructure was synthesized on a copper substrate for 2,2',4,4'-tetrabromodiphenyl ether (BDE47) reduction. First, Cu2O film was synthesized by the electrochemical deposition method, and then TiO2 was coated on the surface of the Cu2O film. The morphology, surface chemical composition and optical characteristics of TiO2-Cu2O film were characterized. The degradation efficiency of BDE47 and hydrogen production by TiO2-Cu2O films was higher than those by pure TiO2 or Cu2O films...
July 5, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28709107/efficient-bacterial-inactivation-with-z-scheme-agi-bi2moo6-under-visible-light-irradiation
#16
Jialiang Liang, Fuyang Liu, Jun Deng, Mian Li, Meiping Tong
A novel Z-scheme AgI/Bi2MoO6 hybrid photocatalyst was fabricated via a solvothermal-precipitation approach to disinfect bacteria in water. Powder X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopic (SEM) equipped with energy-dispersive X-ray spectroscopy (EDX), high resolution transmission electron microscope (HRTEM), UV-vis diffuse reflectance spectra (DRS), as well as photoluminescence spectra (PL) were employed to characterize the fabricated photocatalyst. Due to the stronger redox potential and better separation of charge carriers induced by the Z-scheme structure, the optimal synthesized AgI/Bi2MoO6 exhibited excellent disinfection activity towards both Gram-negative strain Escherichia coli (E...
July 6, 2017: Water Research
https://www.readbyqxmd.com/read/28709091/evaluating-the-photocatalytic-treatment-of-stevioside-by-tio2-in-different-aqueous-matrices-and-identification-of-transformation-products
#17
V A Sakkas, M Sarro, M Kalaboka, V Santoro, T Albanis, P Calza, C Medana
The present study reports the photocatalytic transformation of stevioside, under simulated solar irradiation using TiO2 as a photocatalyst. As a tool of investigating the effect of various aqueous matrices, as well as, the initial stevioside concentration on the variation of the photocatalytic efficiency, a fully nested experimental design was employed. A significant impact on the degradation rate of the sweetener was observed: degradation rate decreases in the order distilled water>river water>lake water, attributed to the increased natural organic matter content of the respective natural water samples...
July 10, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28708622/synthesis-of-zno-cuo-mcm-48-photocatalyst-for-the-degradation-of-organic-pollutions
#18
Yongzheng Duan, Yulian Shen
The photocatalytic properties of ZnO-CuO catalysts supported on siliceous MCM-48 (Mobil Composition of Matter No. 48) for the degradation of organic pollutions such as methylene blue and salicylic acid under UV light irradiation were investigated. These catalysts were prepared by impregnation of MCM-48 with a mixed aqueous solution of copper acetate and zinc acetate. X-ray diffraction, N2-physisorption, high resolution transmission electron microscopy, scanning electron microscopy, Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy and photoluminescence were used to characterize these samples...
July 2017: Water Science and Technology: a Journal of the International Association on Water Pollution Research
https://www.readbyqxmd.com/read/28702522/band-alignment-investigations-of-heterostructure-nio-tio2-nanomaterials-used-as-efficient-heterojunction-earth-abundant-metal-oxide-photocatalysts-for-hydrogen-production
#19
Md T Uddin, Y Nicolas, C Olivier, W Jaegermann, N Rockstroh, H Junge, T Toupance
Earth-abundant NiO/anatase TiO2 heteronanostructures were prepared by a straightforward one-pot sol-gel synthetic route followed by a suitable thermal post-treatment. The resulting 0.1-4 wt% NiO-decorated anatase TiO2 nanoparticles were characterized by X-ray diffraction, electron microscopy, Raman and UV-visible spectroscopy and N2 sorption analysis, and showed both nanocrystallinity and mesoporosity. The careful determination of the energy band alignment diagram by a suitable combination of XPS/UPS and absorption spectroscopy data revealed significant band bending at the interface of the p-n NiO/anatase TiO2 heterojunction nanoparticles...
July 13, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28696708/photocatalytic-%C3%AE-acylation-of-ethers
#20
Zhongdong Sun, Naoya Kumagai, Masakatsu Shibasaki
Direct coupling of ethers and acyl halides was promoted by a binary catalytic system comprising an Ir-based photocatalyst and a Ni complex under blue-light irradiation. Photocatalysts with high triplet energy directed the catalysis, and the reaction likely proceeded by triplet-triplet energy transfer from the excited photocatalysts. Chlorine radicals generated from an excited Ni complex bearing a Ni-Cl bond would be responsible for generating α-oxy radicals leading to the α-acylated ethers.
July 11, 2017: Organic Letters
keyword
keyword
31023
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"