The improvement of photocatalytic processes: Design of a photoreactor using high-power LEDs

Abstract

Keywords:Fluorescent lamp photoreactor High-power LED photoreactor Photocatalytic water purification Reactive blue dye Zinc oxide nanoparticle a b s t r a c t This paper is an attempt to survey the benefits of a well-designed photoreactor containing just 6 ultraviolet UV high power light emitting diodes (HP-LEDs) each one with the power of 1 W (totally 6 W) and the wavelength of 365 nm HP-LEDs as an efficient irradiation source for photocatalytic studies. However we have been reported an experiment just with the 365 nm LEDs, but the other LEDs were predicted for other experiments like green photocatalytic experiments. We installed diodes with respect to the luminescence intensity distribution curves (LIDCs) or intensity patterns. In this order, the efficiency of the UV-HP-LEDs in a HP-LED photoreactor (HPLED-PhR) was compared with the efficiency of the traditional UV lamps that are extensively used in photocatalytic processes including a set of UV HPLEDs was designed and made up and then its performance was compared with a traditional fluorescent lamp photoreactor (FL-PhR) performance. As a typical photocatalytic experiment, Zinc Oxide (ZnO) nanoparticles via co-precipitation methodwere synthesized and used as photocatalyst for purification of water polluted with the reactive blue dye (RB), under UV irradiation in two photoreactors. Results showed that the rate of the photocatalytic reaction under the UV-LEDs wastwice greater than it under the traditional fluorescent UV lamps, while the both electrical power consumption and making cost of the HPLED-PhR are less than a quarter of them for the FL-PhR.

Processing of Palm Mill Oil Effluent Using Photocatalytic: A Literature Review

“…The evolved flat plate dependent bed photoreactor changed into capable of perform in nonstop mode the use of optimized N-doped TiO 2 photocatalyst immobilized [Vaiano et al, 2015]. Khademalrasool et al [2016] studied approximately photocatalytic response below the UV-LEDs and conventional fluorescent UV lamps. The consequences confirmed that the charge of photocatalytic response below the UV-LEDs changed into instances more than the charge below the conventional fluorescent UV lamps, whilst each electric energy intake and production value of the power LED photoreactor (HPLED-PhR) have been much less than quarter of them for the flourescent lamp photoreactor (FL-PhR) [Khademalrasool et al, 2016].…”

“…Khademalrasool et al [2016] studied approximately photocatalytic response below the UV-LEDs and conventional fluorescent UV lamps. The consequences confirmed that the charge of photocatalytic response below the UV-LEDs changed into instances more than the charge below the conventional fluorescent UV lamps, whilst each electric energy intake and production value of the power LED photoreactor (HPLED-PhR) have been much less than quarter of them for the flourescent lamp photoreactor (FL-PhR) [Khademalrasool et al, 2016]. The methylene blue, direct blue-15 malachite green, and amaranth dye degradation changed into received 93%, 94% 88%, and 85% respectively the use of the TiO 2 coated mosquito net below ultraviolet mild irradiation during four h through the use of easy photocatalytic reactor the use of TiO 2 coated mosquito net and ultraviolet mild emitting diodes (UVLEDs) [Jo & Rajesh, 2016].…”

Impact of Reaction Parameters and Water Matrices on the Removal of Organic Pollutants by TiO2/LED and ZnO/LED Heterogeneous Photocatalysis Using 365 and 398 nm Radiation

“…LEDs are also available at an affordable price while being compact and robust—thus, flexible and efficient photochemical setups can be constructed [ 16 ], and they have a significantly longer lifetime (>10,000 h). The application of UV-LEDs offers an alternative solution for the excitation of photocatalysts and has been employed for heterogeneous photocatalysis in recent years [ 20 , 22 , 23 ]. It is challenging to find the best design for photoreactors, such as optimizing the distribution and number of LEDs and light intensity [ 24 ].…”

A Novel Microtiter Plate Format High Power Open Source LED Array

“…Furthermore, determination of hydroxyl radical reaction rate constants can be facilitated using high power UV LEDs [13]. Due to their small size, high power UV LEDs are used to design new photoreactors to improve photocatalytic processes [14]. The previously presented examples demonstrate that LEDs are versatile in their applications [15], and high-power LEDs can be used in many different biochemical areas.…”