نتایج جستجو برای: اسپکتروفوتومتر uv vis

تعداد نتایج: 79554  

Journal: :Journal of Quantitative Spectroscopy and Radiative Transfer 2020

Journal: :Beilstein Journal of Organic Chemistry 2011

2014
Weirong Zhao Zhuyu Ai Jiusong Dai Meng Zhang

BACKGROUND PURPOSE Photocatalytic water splitting for hydrogen evolution is a potential way to solve many energy and environmental issues. Developing visible-light-active photocatalysts to efficiently utilize sunlight and finding proper ways to improve photocatalytic activity for H2 evolution have always been hot topics for research. This study attempts to expand the use of sunlight and to enha...

2013
Isaac W. Mwangi J. Catherine Ngila Patrick Ndungu Titus A. M. Msagati

Domestic water is abstracted from its sources in raw form with a high content of dissolved and suspended material. Polydiallyldimethylammonium chloride (polyDADMAC) is a cationic polyelectrolyte used in the initial water clarification process. However, its residues in treated water pose a health risk as they react with chlorine to produce a carcinogenic compound. There is a need to determine th...

2014

The intent of these guidelines is to ensure that applicable electronic records are reliable, authentic and maintained with high integrity. This technical note describes features and functionality of Agilent UV-Visible ChemStation (revision B.05.XX) in combination with Agilent OpenLAB Enterprise Content Manager (ECM) for data management, which enable customers to implement the guidelines of 21 C...

2017
Zhi Zheng Lin Gan Jianbing Zhang Fuwei Zhuge Tianyou Zhai

ZnO nanostructure-based photodetectors have a wide applications in many aspects, however, the response range of which are mainly restricted in the UV region dictated by its bandgap. Herein, UV-vis-NIR sensitive ZnO photodetectors consisting of ZnO nanowires (NW) array/PbS quantum dots (QDs) heterostructures are fabricated through modified electrospining method and an exchanging process. Besides...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تربیت مدرس - دانشکده علوم پایه 1390

در این کار، نانوذرات سولفیدسرب pbs به کمک عامل‏های پوششی در محیط آبی رشد داده شدند. مشخصه‏یابی این نانوذرات به کمک الگوی پراش اشعهx و طیف جذبی uv-vis-nir صورت گرفت. سپس تلاش شد با تغییر عامل پوششی و ph محیط نانوذراتی با اندازه‏های مختلف تولید شود. تغییر اندازه‏ی نانوذرات به کمک طیف جذبی و با استفاده از رابطه‏ی بروس بررسی شد. همچنین تأثیر متغییرهای محیطی بر پایداری کلوئید سولفیدسرب مورد بررسی قر...

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