Photocatalytic Degradation of Rhodamine B Dye by Nanocomposites: A Review

Abstract

Pollution by textile dyes on waterbodies is an issue for both human health and the environment. To remove/degrade dyes, many approaches (coagulation, membrane separation, and adsorption) have been investigated. However, the use of semiconductor-assisted materials in conjunction with sustainable solar energy has emerged as a possible solution to the problem. Although single component photocatalysts have been tested, composites of semiconductor materials are being employed owing to their low efficiency and stability due to the high recombination rate electron-hole pair and inefficient visible light absorption. By combining two or more semiconductor components, semiconductor heterojunction systems are created. Overall stability is increased by the synergistic impact of their features, such as adsorption and better charge carrier movement. This paper discusses current advances in advanced nanocomposite materials utilized as photocatalysts, as well as the utilization of heterojunctions, crystallinity, and doping to improve photocatalytic characteristics. The conclusion includes a summary, research gaps, and a forecast for the future. This study will aid in the development of efficient heterostructure photodegradation systems by providing a comprehensive appraisal of recent advances in demonstrating effective nanocomposites for photodegradation of Rhodamine B dye under ideal circumstances.

TiO2-Decorated by Nano-γ-Fe2O3 as a Catalyst for Efficient Photocatalytic Degradation of Orange G Dye under Eco-friendly White LED Irradiation

“…The quantity of nanocomposites as nanocatalysts is another important parameter in assessing the effect of the photocatalyst process on dye removal efficiency. − The effect of the photocatalyst γ-Fe 2 O 3 Np/TiO 2 nanocomposite amount on photodegradation of OG was investigated by varying the γ-Fe 2 O 3 Np/TiO 2 amount to 50, 70, 80, 90, and 100 mg in contact with 100 mL of OG solution (5 mg L –1 ), with same experimental conditions and under LED irradiation, and the obtained results are reported in Figure . It has been observed that the loading of photocatalysts has a significant impact on OG degradation.…”

An Overview of Nanocomposites with Recent Advancements

“…Some of the common techniques used to characterize nanocomposites are XRD, SEM, EDS, TEM, TG, DSC, and FTIR. To investigate the phases present in the nanocomposites XRD is preferred [51][52][53][54][55]. To study the morphology of the nanocomposites SEM is the best choice.…”

Investigation of photocatalytic activity of nickel-doped manganese aluminum ferrite nanoparticles for rhodamine b degradation under visible light

“…It is a persistent organic pollutant that can remain in the environment for long periods, posing a risk to aquatic life and humans. Rhodamine B is toxic to humans and can cause skin irritation, eye irritation, respiratory problems, digestive problems, and cancer [3,4]. Rhodamine B is resistant to biodegradation due to its stable structure, so it persists in natural environments and wastewater systems after use.…”