Photocatalytic degradation of phenol by the heterogeneous Fe3O4 nanoparticles and oxalate complex system

RSC Advances ◽  
2014 ◽  
Vol 4 (77) ◽  
pp. 40828-40836 ◽  
Author(s):  
Piao Xu ◽  
Guangming Zeng ◽  
Danlian Huang ◽  
Liang Liu ◽  
Cui Lai ◽  
...  
Keyword(s):  
Complex System ◽  
Photocatalytic Degradation ◽  
Fe3o4 Nanoparticles ◽  
Radical Mechanism ◽  
Phenol Removal ◽  
Oxalate Complex ◽  
Novel Approach ◽  
System P

A novel approach for phenol removal using Fe3O4 nanoparticles and oxalate was proposed via a radical mechanism.

Controllable synthesis of perovskite-like PbBiO2Cl hollow microspheres with enhanced photocatalytic activity for antibiotic removal

CrystEngComm ◽  
2017 ◽  
Vol 19 (32) ◽  
pp. 4777-4788 ◽  
Author(s):  
Sheng Yin ◽  
Ting Wu ◽  
Ming Li ◽  
Jun Di ◽  
Mengxia Ji ◽  
...  
Keyword(s):  
Complex System ◽  
Photocatalytic Activity ◽  
Hollow Microspheres ◽  
Polyvinyl Pyrrolidone ◽  
Porous Sphere ◽  
Controllable Synthesis ◽  
System P ◽  
Antibiotic Removal

Novel perovskite-like PbBiO2Cl materials with hollow and porous sphere-like structures were successfully synthesized using a polyvinyl pyrrolidone (PVP) and 1-hexadecyl-3-methylimidazolium chlorine ([C16mim]Cl) complex system.

A chemiluminescence method for the determination of verapamil hydrochloride in pharmaceutical and environmental samples based on an Fe3O4 nanoparticles enhanced NaHCO3–H2O2 system

2017 ◽  
Vol 9 (47) ◽  
pp. 6705-6712 ◽  
Author(s):  
Mortaza Iranifam ◽  
Nasim Rahmati Hendekhale
Keyword(s):  
Fe3o4 Nanoparticles ◽  
Environmental Samples ◽  
Chemiluminescence Method ◽  
Verapamil Hydrochloride ◽  
Enhanced Chemiluminescence ◽  
System P ◽  
H2o2 System

In this work, an Fe3O4 nanoparticles (NPs)-enhanced chemiluminescence (CL) method was developed for the determination of verapamil hydrochloride (VRP).

scholarly journals When Coincidence has Meaning: Understanding Emergence Through Networks of Information Token Recurrence

2020 ◽  
Author(s):  
Markus Luczak-Roesch
Keyword(s):  
Complex System ◽  
Causal Relationship ◽  
Relationship Building ◽  
Information Cascades ◽  
Level System ◽  
Mathematical Properties ◽  
Tensor Theory ◽  
Novel Approach ◽  
Theoretical Assumptions ◽  
Micro Level

In this paper I conceptualise a novel approach for capturing coincidences between events that have not necessarily an observed causal relationship. Building on the Transcendental Information Cascades approach I outline a tensor theory of the interaction between rare micro-level events and macro-level system changes. Afterwards, I discuss a number of application areas that are promising candidates for the validation of the theoretical assumptions outlined here in practice. This is preliminary work that is sought to lay the foundation to discover universal mathematical properties of coincidences that have a measurable impact on the macroscopic state of a complex system and are therefore to be considered meaningful.

scholarly journals Cu2(OH)PO4/reduced graphene oxide nanocomposites for enhanced photocatalytic degradation of 2,4-dichlorophenol under infrared light irradiation

RSC Advances ◽  
2018 ◽  
Vol 8 (7) ◽  
pp. 3611-3618 ◽  
Author(s):  
Chenyang Zhang ◽  
Zhen Du ◽  
Ruyi Zhou ◽  
Peng Xu ◽  
Xinghua Dong ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Graphene Oxide ◽  
Photocatalytic Degradation ◽  
Reduced Graphene Oxide ◽  
Reaction System ◽  
Light Irradiation ◽  
Infrared Light ◽  
System P ◽  
Reduced Graphene

Nanocomposites of Cu2(OH)PO4 and rGO exhibit the maximized infrared light photocatalytic activity for the degradation of 2,4-DCP due to the combination of the photocatalytic and photo-Fenton effects into one reaction system.

scholarly journals Efficient cleavage of tertiary amide bonds via radical–polar crossover using a copper(ii) bromide/Selectfluor hybrid system

2020 ◽  
Vol 11 (45) ◽  
pp. 12323-12328
Author(s):  
Zhe Wang ◽  
Akira Matsumoto ◽  
Keiji Maruoka
Keyword(s):  
Hybrid System ◽  
Amide Bonds ◽  
Tertiary Amide ◽  
Novel Approach ◽  
System P ◽  
Tertiary Amides

A novel approach for the efficient cleavage of the amide bonds in tertiary amides is reported.

The Photocatalytic Properties of Br-Doped Titania Nanotube Arrays and its Application in Degradation of Sugar Wastewater

2013 ◽  
Vol 641-642 ◽  
pp. 11-17 ◽  
Author(s):  
Zhi Peng Meng ◽  
Fu Xin Zhong ◽  
Dan Yu Wang ◽  
Zhong Ming Zhang ◽  
Hua Ying Li ◽  
...  
Keyword(s):  
Titanium Dioxide ◽  
Photocatalytic Degradation ◽  
Uv Light ◽  
Anatase Phase ◽  
Rutile Phase ◽  
Photocatalytic Properties ◽  
Nanotube Arrays ◽  
Illumination Time ◽  
Novel Approach ◽  
Titanium Dioxide Nanotube Arrays

This paper presents a novel approach for preparing titanium dioxide nanotube arrays (TNTs) loaded with highly dispersed Br through an ultrasound aided photochemical route. The content of Br doped on the arrays was controlled by changing the concentration of NaBr and the ultrasound time. The Br doped TiO2nanotube arrays were characterized by SEM, XRD and UV–Vis spectrum. Doping the bromine did not basically affect the morphology of the surface of the TNTs, but part of the anatase phase transformed into rutile phase, which led to the formation of the mixed crystal and increased the photocatalytic activity. The results showed that Br doping significantly enhanced the photocatalytic degradation rate of titanium dioxide nanotube arrays under UV-light irradiation. The main factors which affected photocatalytic degradation of sugar wastewater were the illumination time and pH. The results showed that the longer the exposure time was, the initial pH of wastewater was more favorable to photocatalytic degradation of the sugar wastewater for the Br-TiO2nanotube arrays, and compared to undoped TiO2nanotube arrays Br doped TiO2nanotube arrays had better photocatalytic properties.

Effects of organic acids and initial solution pH on photocatalytic degradation of bisphenol A (BPA) in a photo-Fenton-like process using goethite (α-FeOOH)

2016 ◽  
Vol 15 (8) ◽  
pp. 1046-1053 ◽  
Author(s):  
Guangshan Zhang ◽  
Qiao Wang ◽  
Wen Zhang ◽  
Tian Li ◽  
Yixing Yuan ◽  
...  
Keyword(s):  
Reaction Mechanism ◽  
Bisphenol A ◽  
Organic Acids ◽  
Photocatalytic Degradation ◽  
Initial Solution ◽  
Solution Ph ◽  
System P

Proposed reaction mechanism of BPA photodegradation in an α-FeOOH-oxalate synergistic system.

scholarly journals Assessment of environmental applicability of TiO2 coated self-cleaning glass for photocatalytic degradation of estrone, 17β-estradiol and their byproducts

2019 ◽  
Vol 36 (4) ◽  
pp. 347-359
Author(s):  
Golnar Matin ◽  
Ali Reza Amani-Ghadim ◽  
Amir Abbas Matin ◽  
Navid Kargar ◽  
Hasan Baha Buyukışık
Keyword(s):  
Photocatalytic Degradation ◽  
Interactive Effects ◽  
Alkaline Media ◽  
Maximum Efficiency ◽  
X Ray Diffraction ◽  
Force Microscopy ◽  
Atomic Force ◽  
Novel Approach ◽  
17Β Estradiol ◽  
Self Cleaning

Optimization of photocatalytic degradation of two natural estrogenic compounds, estrone (E1) and 17β-estradiol (17β-E2) in aqueous medium was performed on TiO2 coated Pilkington ActivTM self-cleaning glass as a novel approach to eliminate free nano-TiO2 releasing to the intended environment after treatment. The active glass was characterized by Atomic Force Microscopy (AFM), X-ray diffraction (XRD), and Raman spectroscopy to characterize the TiO2 nanoparticles. The main purposes were mineralization of target compounds in the treated water during the photocatalytic reaction and also to investigate the oxidation by products. Response Surface Methodology (RSM) has been applied to optimize the photocatalytic degradation by changing time, pH, and light intensity as effective factors. According to the results, time was the more effective parameter. The maximum efficiency degradation was achieved in alkaline media. Due to interactive effects between variable factors, 1 mg/L aqueous solution of E1 and 17β-E2 in water was totally decomposed by TiO2 photocatalyzed reactions under UV-C irradiation of 10.08 W/m2 for 52.49 min at pH 9.42. Results of GC-MS analysis were introduced 17-deoxy Estrone and 2-Hydroxyestradiol as intermediate products for E1 and 17β-E2, respectively. All of the peaks finally disappeared after 170 min. Optimized conditions were applied for real sample of wastewater, presenting 30.40% and 56.84% in the efficiency degradation of E1 and 17β-E2, respectively.

scholarly journals Paradigmatic and syntagmatic effects in Estonian spontaneous speech

2021 ◽  
Author(s):  
Kaidi Lõo ◽  
Fabian Tomaschek ◽  
Pärtel Lippus ◽  
Benjamin V. Tucker
Keyword(s):  
Complex System ◽  
Internal Structure ◽  
Speech Production ◽  
Production System ◽  
Language Production ◽  
Spontaneous Speech ◽  
Corpus Analysis ◽  
Linguistic Context ◽  
System P ◽  
Morphological Family

Recent evidence has indicated that a word's morphological family and inflectional paradigm members get activated when we produce words. These paradigmatic effects have previously been studied in careful, laboratory context using words in isolation. This previous research has not investigated how the linguistic context affects spontaneous speech production. The current corpus analysis investigates paradigmatic and syntagmatic effects in Estonian spontaneous speech. Following related work on English, we focus on morphemic and non-morphemic word final /-s/ in content words. We report that linguistic context, as measured by conditional probability, has the strongest effect on the acoustic durations, while inflectional properties (internal structure and inflectional paradigm size) also affect word and segment durations. These results indicate that morphology is part of a complex system that interacts with other aspects of the language production system.

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