Reduction of lignin color via one-step UV irradiation

2016 ◽  
Vol 18 (3) ◽  
pp. 695-699 ◽  
Author(s):  
Jingyu Wang ◽  
Yonghong Deng ◽  
Yong Qian ◽  
Xueqing Qiu ◽  
Yuan Ren ◽  
...  
Keyword(s):  
Uv Irradiation ◽  
One Step

One-step irradiation in a mild solvent caused lignin to be partially depolymerized and π–π disaggregated and thus lignin was largely whitened.

scholarly journals One-step selective-wettability modification of PMMA microfluidic devices by using controllable gradient UV irradiation (CGUI)

2018 ◽  
Vol 273 ◽  
pp. 1508-1518 ◽  
Author(s):  
Chao Liang ◽  
Yuanchang Liu ◽  
Chong Liu ◽  
Xia Li ◽  
Li Chen ◽  
...  
Keyword(s):  
Uv Irradiation ◽  
Microfluidic Devices ◽  
One Step

Effect of Reaction Time on the Morphology and Photocatalytic Property of ZnO Nanoparticles

2017 ◽  
Vol 726 ◽  
pp. 365-369
Author(s):  
Xia Kong ◽  
Ya Wei Hu ◽  
Wei Pan
Keyword(s):  
Aqueous Solution ◽  
Methylene Blue ◽  
Reaction Time ◽  
Uv Irradiation ◽  
Zno Nanoparticles ◽  
Uv Light ◽  
Photocatalytic Property ◽  
Crystallographic Structure ◽  
Elliptical Shape ◽  
One Step

Abstract. ZnO nanoparticles with different morphology were synthesized through a one-step and low temperature hydrothermal method with different reaction time. The prepared ZnO nanoparticles have been used as photocatalysts for the degradation of methylene blue (MB) aqueous solution under UV irradiation to study the relationship between the morphology and photocatalytic performance. The phase, crystallographic structure and morphology of synthesised ZnO nanoparticles were characterized by scanning electron microscope (SEM) and X-ray diffraction (XRD). The photocatalytic activity of ZnO nanoparticles were carried out by UV-visible spectroscopy (UV-vis). SEM results showed that different particle sizes and morphologies of flower-like, elliptical-shape and rod-shapes were obtained at 60 °C for 1 h, 4 h, 8 h and 12 h, which promoted photodegradation of methylene blue (MB) aqueous solution under UV light irradiation. Especially, elliptical-shape ZnOnanoparticles with reaction time of 4 h were most efficient, and the degradation rate was up to 98.2% after 20 min UV irradiation.

One-step generation of degraded DNA by UV irradiation

2007 ◽  
Vol 360 (1) ◽  
pp. 163-165 ◽  
Author(s):  
B.C.M. Pang ◽  
B.K.K. Cheung
Keyword(s):  
Uv Irradiation ◽  
Degraded Dna ◽  
One Step ◽  
Step Generation

scholarly journals Enhancement of Solvent Resistance of Polyimide Electrospun Mat via the UV-Assisted Electrospinning and Photosensitive Varnish

Polymers ◽  
2019 ◽  
Vol 11 (12) ◽  
pp. 2055 ◽  
Author(s):  
Lin Qi ◽  
Chen-Yu Guo ◽  
Meng-Ge Huang Fu ◽  
Yan Zhang ◽  
Lu-meng Yin ◽  
...  
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Uv Irradiation ◽  
Starting Material ◽  
Current Work ◽  
Mercury Lamp ◽  
Solvent Resistance ◽  
One Step ◽  
The One

A new methodology for enhancing the solvent resistance of electrospun polyimide (PI) ultrafine fibrous mat (UFM) was investigated in the current work. For this purpose, a negative intrinsically photosensitive polyimide (PSPI) resin was prepared by the one-step high- temperature polycondensation procedure from 3,3’,4,4’-benzophenonetetracarboxylic dianhydride (BTDA) and α,α-bis(4-amino-3,5-dimethylphenyl)phenylmethane (PTMDA). The PI varnish, by dissolving the derived PI (BTDA-PTMDA) resin in N,N-dimethylacetamide (DMAc) at a solid of 20 wt %, was used as the starting material for the standard electrospinning (ES) and ultraviolet-assisted ES (UVAES) fabrications, respectively. The 365 nm wavelength of the high-pressure mercury lamp ultraviolet (UV) irradiation induced the photocrosslinking reaction in the PSPI mat. Solubility tests indicated that the PI UFM fabricated by standard ES procedure showed poor DMAc resistance, while the one by UVAES (PI-UV) exhibited excellent resistance to DMAc.

One-step method for preparation of pH-responsive gold nanoparticles with block copolymer shell structures by UV irradiation

2011 ◽  
Vol 67 (6) ◽  
pp. 1059-1072 ◽  
Author(s):  
Xiaoning Fu ◽  
Hui Yang ◽  
Xiaokai Zhang ◽  
Xue Li ◽  
Limei Xu ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Block Copolymer ◽  
Uv Irradiation ◽  
Shell Structures ◽  
Ph Responsive ◽  
Step Method ◽  
One Step

Uniform SnO2 Hexagonal Prisms with Enhanced Photocatalytic Performance

2021 ◽  
Vol 16 (4) ◽  
pp. 624-629
Author(s):  
Yingxin Zhang ◽  
Xiaoxiong Song ◽  
Li Cui
Keyword(s):  
Photocatalytic Activity ◽  
Organic Pollutants ◽  
Uv Irradiation ◽  
Potential Application ◽  
Tin Dioxide ◽  
Photocatalytic Performance ◽  
Organic Dyes ◽  
Hydrothermal Route ◽  
One Step

In this work, SnO2 hexagonal prisms are successfully prepared by a simple one-step hydrothermal route. The photocatalytic activity of the synthesized product is studied through the degradation of several organic dyes. It shows that eosin red solution is almost degraded after 25 min with UV irradiation. The photodegradation of SnO2 samples with different morphologies and commercial tin dioxide powders are also compared. The as-prepared products exhibit excellent photocatalytic stability, revealing its potential application in the removal of organic pollutants from wastewater.

The Preparation of BiOCl Microspheres and its Photocatalytic Performance

2012 ◽  
Vol 487 ◽  
pp. 841-844 ◽  
Author(s):  
Xiao Chao Du ◽  
Wen Wen Zhao ◽  
Ya Wei Liu ◽  
Xiang Ping Huang ◽  
Feng Mao
Keyword(s):  
Photocatalytic Activity ◽  
Uv Irradiation ◽  
Photocatalytic Performance ◽  
Absolute Ethanol ◽  
Heating Method ◽  
Excellent Photocatalytic Activity ◽  
One Step ◽  
Better Than

The BiOCl microspheres photocatalyst was obtained by a one-step alcohol-heating method. The reactants were Bi(NO3)3•5H2O、TiCl3 and absolute ethanol, and the sample was synthesized at 100°C and calcined at 600°C. It then characterized by XRD, SEM, UV-vis DRS. The results showed that the sample was microspheres, having excellent photocatalytic activity that the sample could degradate more than 94% of RhB in 65 minites which is better than P25 under UV irradiation.

An Interactive Minicomputer Program for the Indexing and Simulation of Electron Diffraction Patterns

1976 ◽  
Vol 34 ◽  
pp. 542-543
Author(s):  
R.P. Goehner ◽  
W.T. Hatfield ◽  
Prakash Rao
Keyword(s):  
Electron Diffraction ◽  
Real Time ◽  
Pattern Analysis ◽  
Flow Diagram ◽  
Hard Copy ◽  
Time Analysis ◽  
Real Time Analysis ◽  
Transmission Electron ◽  
One Step ◽  
Diffraction Patterns

Computer programs are now available in various laboratories for the indexing and simulation of transmission electron diffraction patterns. Although these programs address themselves to the solution of various aspects of the indexing and simulation process, the ultimate goal is to perform real time diffraction pattern analysis directly off of the imaging screen of the transmission electron microscope. The program to be described in this paper represents one step prior to real time analysis. It involves the combination of two programs, described in an earlier paper(l), into a single program for use on an interactive basis with a minicomputer. In our case, the minicomputer is an INTERDATA 70 equipped with a Tektronix 4010-1 graphical display terminal and hard copy unit.A simplified flow diagram of the combined program, written in Fortran IV, is shown in Figure 1. It consists of two programs INDEX and TEDP which index and simulate electron diffraction patterns respectively. The user has the option of choosing either the indexing or simulating aspects of the combined program.

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