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Hpl n

Manufactured by Philips
Sourced in China

The HPL-N is a laboratory equipment product manufactured by Philips. It is a high-performance light source designed for use in various scientific and research applications. The core function of the HPL-N is to provide a stable and reliable source of illumination for applications that require precise and controlled lighting conditions.

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5 protocols using hpl n

1

Photocatalytic Degradation of Methylene Orange

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Consecutively, to estimate the photocatalytic activity,
surface-sensitized
TiO2 by MoS2 was employed with respect to MO
degradation in an aqueous media under UV–vis light (365 nm).
The entire degradation experiment was conducted at room temperature
using a high-pressure mercury lamp (250 W, Philips HPL–N).
Initially, to achieve adsorption–desorption equilibrium, the
photocatalyst (0.5 g/dm3) was dispersed in the MO solution
(100 mL, 20 mg L–1) with constant stirring for 30
min in the dark. Then, 3 mL of suspension was taken out after a considered
time interval. At the same time, water continuously passed through
the outer jacket of the reactor to maintain the temperature. A UV–vis–NIR
spectrophotometer (UV–3600, Shimadzu) was used to acquire absorbance
spectra to evaluate the degradation processes of MO on account of
alter absorbance of the particular absorption peak at 465 nm. The
photodegradation efficiency (η %) was calculated through the
following eq 12.77 (link) where A0 and At represent initial absorbance
and absorbance after photodegradation of MO at particular time intervals,
respectively.
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2

Photodegradation of Dyes under UV Radiation

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Photodegradation of the dyes MB (1 mg/dm3) and RB (1 mg/dm3) under UV radiation was performed in a photochemical cell made of double-walled Pyrex glass in the presence of NH4BETA, NH4ZSM-5, and the NaY zeolite. Into the cell, 20 cm3 of the aqueous solution of dye and 0.1 g of zeolite were weighed (exact weight ±10−4 g), followed by sonification in an ultrasonic bath for 15 min, to achieve a uniform size of the catalyst particles. The photochemical cell was placed on a magnetic stirrer, and the suspension was continuously mixed during the irradiation with a constant oxygen flow. Photodegradation was performed at 283 K and 293 K for 180 min and a high-pressure mercury lamp with a suitable concave mirror was used as a source of UV radiation (Philips, HPL-N, 125 W, with emission bands in the area of UVA radiation at 304, 314, 335 and 366 nm, with an emission maximum at 366 nm).
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3

Photocatalytic Degradation of Methylene Blue

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The photocatalytic potential of the CuO and Ag–CuO were investigated by degradation of methylene blue (MB). Experimentally, solutions of MB with different concentrations were prepared. The specific amount of the synthesized photocatalyst with different Ag doping, was added and stirred in the batch-type reactor under UV visible light illumination till the equilibrium. A bulb ((λ ≥ 420 nm, HPL-N, 125 W, Philips, China) was used to supply visible light irradiation. 5 mL of the mixture was taken out and centrifuged. It was filtered and the dye remaining concentration in the filtrate was determined by checking the absorbance spectrophotometrically. MB has an absorbance band in the visible region at 665 nm. The blue shift in the peak with time confirm the degradation and removal of MB by the photocatalyst. The effect of various parameters such as Ag doping, pH, catalyst amount, contact time, and dye initial concentration were studied to optimize the experimental condition for maximum removal. The percent degradation of MB was calculated by Eq. (2). %Removal=Co-CeCo×100 where (Co) is the initial while (Ce) the is final concentration of the analyte.
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4

Photocatalytic Degradation of Organic Pollutants

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Silver nitrate (AgNO3, >99%), 3-mercaptopropionic acid (MPA), sodium borohydride (NaBH4), sodium citrate dihydrate (Na3(C6H5O7)·H2O), polyvinylpyrrolidone 10000 (PVP 10000), phenol, 1-ethyl-3-(3-dimethylaminopropyl) carbodiimide hydrochloride (EDC), oxalic acid, 4-aminoantipyrine, potassium persulfate and tetraethyl orthosilicate (TEOS) were purchased from Sigma-Aldrich, and TiO2 P25 Aeroxide® (P25) was purchased from Degussa-Evonik. All chemicals were used without further purification.
A high-pressure 125 W Hg lamp (Philips HPL-N) without the glass bulb was employed as the radiation source. The lamp exhibits Hg emission lines at 690, 579, 576, 548, 491, 435, 407, 404 and 365 nm. The Museum Glass® from True Vue™ was employed as a UV cut-off filter, placed between the lamp and the photodegradation vessel, by attenuating the 365 nm line and higher energy emission by two orders of magnitude. A Shimadzu UV-3101 PC spectrophotometer was used to monitor the photocatalysis and to characterize the photocatalysts through Diffuse Reflectance (DR) spectra by using an integrating sphere. Transmission Electron Microscopy (TEM) and energy dispersive X-ray spectroscopy (EDS) analysis were carried out on a Philips CM 200 Microscope operating at 200 kV.
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5

Photocatalytic Degradation of Rhodamine B

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The photocatalytic activity of Sr1−3x Bi2xФxMoO4 (0 ≤ x ≤ 0,025) system by the degradation of Rhodamine B in water solution (350 W lamp HPL-N (Philips), was evaluated.

The lamp emits to 365 nm with an energy of 4 eV.

An amount of 0.2 g of substrate to 200 mL for RhB solution (10 mg/L) in a double layer glass tumbler, was added.

Before illumination with the lamp, the suspensions were magnetically stirred for ~ 30 min by a magnetic stirrer (~ 400 rpm, to establishment an adsorption-desorption equilibrium between the photocatalyst and the RhB solution.

The total irradiation time was of 30 min, and tested in 1, 2, 5, 10, 15, 20 and 30 min. The samples were filtered and closed in test tubes to be analyzed using the Unico 2800 spectrophometer at 554 nm wavelength.

The absorbances and statistically analyzed to calculate the percentage of decolorization (D) of RhB, were recorded.

The temperature during the photocatalysis was 40,0 ± 1 ºC, controlled by a water recirculation system with a cooling system.

Excess oxygen was supplied during the suspension reaction using a corundum air diffuser aeration system.

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