Degradation Of Malachite Green Dye Research Articles

The Study of Photocatalytic Degradation Kinetics and Mechanism of Malachite Green Dye on Ni–TiO2 Surface Modified with Polyaniline

Synthetic organic dyes are coloring agents used in various industries. Despite the fact that they offer exciting colors and long-lasting effects, certain organic dyes can have harmful impacts on human health and aquatic ecosystems. This study investigates the photocatalytic degradation of malachite green dye using Ni–TiO2 nanoparticles (NPs) and Ni–TiO2/PANI nanocomposites (NCs) in various reaction conditions. The surface and compositional change of synthesized photocatalysts were characterized by XRD, FTIR, AAS, and UV–vis spectrophotometer. Accordingly, the XRD results signify the crystal structure of photocatalysts found to be tetragonal anatase phase while the FT-IR spectra indicate the titanium has predominantly form a coordination compound upon reaction with nitrogen atom through weakening the bond strength between C═N, C═C, and C─N in the PANI. The UV–vis measurement shows that the energy bandgaps were decreased from 3.20 to 2.77 eV and 2.59 eV for Ni–TiO2 NPs and Ni–TiO2/PANI NCs, respectively. From AAS data, the authors confirmed that Ni metal has significantly existed in the aforementioned photocatalysts after the calcination process. The photocatalytic degradation of Ni–TiO2 NPs and Ni–TiO2/PANI NCs on the model dye has studied and their efficiency was 94.22% and 99.09%, respectively. The photocatalytic degradation follows pseudo-first order with 2.23 × 10−2 min−1 reaction rate at optimum conditions of pH 8.5, initial dye concentration of 0.2 g/L, catalyst load of 0.2 g/L, and irradiation time of 90 min. With this, the outstanding result recorded using Ni–TiO2/PANI NCs is ascribed to the smaller particle size as compared to Ni–TiO2 NPs, and it is found to be the promising photocatalyst for the removal of wastewater containing organic dyes.

Photoluminescence and photocatalytic degradation studies of Zn-based nanoparticles on malachite green dye

Water, the most fundamental source of life, is contaminated by various organic pollutants, especially organic dyes from the dying industry. The photocatalytic degradation of malachite green (MG) was studied using a zinc-based metal-organic framework (Zn-BTC MOF) and ZnO. Thermally decomposing Zn-MOF synthesized ZnO and its structural and optical properties were analyzed using various spectroscopic techniques. This article focuses primarily on the wavelength-dependent photoluminescence properties of Zn-MOF and ZnO materials and their role in the photocatalytic degradation of MG dye in water. Zn-MOF and ZnO photocatalysts exhibited a photodegradation efficiency of approximately 99% after 40 min of visible light exposure. Based on kinetic experiments, the degrading efficiency of these catalysts followed pseudo-first-order reaction kinetics with a correlation of R2 = 0.99 and a rate constant of 0.031 min−1. This manuscript is helpful to researchers working on ZnO and Zn-MOF materials for photocatalytic and environmental applications.

Photocatalytic degradation of malachite green dye under solar light irradiation using ZnO and ZnO–TiO2 nanoparticles

Photocatalytic degradation of malachite green dye under solar light irradiation using ZnO and ZnO–TiO2 nanoparticles

Application of Trametes pubescens for dye removal and biological pretreatment of sugarcane bagasse

AbstractSugarcane bagasse (SB) is an abundantly available agrowaste that is used extensively as a substrate for the production of different industrial enzymes. It is a renewable resource, rich in fermentable sugars. However, the presence of lignin makes it difficult for microbes to degrade it and so it is difficult to utilize it. Keeping in mind the role of white rot fungi in lignin degradation, Trametes pubescens MB89 was used in this study for the delignification of SB with the simultaneous production of laccase. The fungus was also used for the degradation of malachite green dye. A Box–Behnken design (BBD) was used to optimize variables affecting solid state fermentation of SB for laccase production. The leftover SB after fermentation was used for cellulase production by the thermophilic bacterium Neobacillus sedimentimangrovi UE25. The BBD depicted optimized conditions as 60% moisture, particle size 100 μ, 10 days’ incubation period, 450 μM CuSO4, and a temperature of 30 °C. The laccase titers of 1271 IU mL−1 were obtained under optimized conditions. Neobacillus sedimentimangrovi UE25 produced 4.574 IU mL−1 of endoglucanase and 1.812 IU mL−1 of β‐glucosidase by utilizing fungal pretreated SB. Scanning electron microscopy and Fourier transform infrared spectroscopy confirmed the impact of fungal cultivation on SB. Pores were observed after microbial pretreatment and there were changes in the morphological characteristics such as the pith and fiber of SB. To test the ability of laccase to break down aromatic dyes, we grew the fungus T. pubescens MB89 in a nutrient‐rich medium supplemented with malachite green dye. The fungus was able to remove 73.68% of the malachite green dye from the medium in 24 h. This shows that T. pubescens MB89 has a range of potential applications for environmental and industrial purposes.

Synthesis of Flower-Like CuBi2O4 Microspheres and Its Photocatalytic Activity

In this study, visible-light copper bismuth oxide (CuBi2O4) photocatalyst were synthesized via co-precipitation (CuBi2O4-C) and microwave-assisted methods (CuBi2O4-M). The X-ray powder diffraction (XRD) analysis reveals the presence of pure tetragonal, along with band gaps of 2.9 eV in both samples.  The microwave-assisted method produced flower-like CuBi2O4 microspheres, which had a larger BET surface area and demonstrated the highest photocatalytic performance, approximately 83.4 % in the decolorization of malachite green (MG) dye under visible light.  Therefore, the research suggested a facile strategy for the fast synthesis of CuBi2O4 microspheres under mild reaction conditions. The use of microwave heat treatment is a faster and more efficient way to photocatalyst materials, while also being cost-effective and energy-saving. HIGHLIGHTS The flower-like CuBi2O4 microspheres synthesized via the microwave-assisted method offer a promising approach for efficient and cost-effective photocatalysis, particularly in the degradation of malachite green dye under visible light. This study highlights the potential of microwave synthesis in enhancing the photocatalytic performance of CuBi2O4 materials GRAPHICAL ABSTRACT

Synthesis, Characterization, Kinetic and Thermodynamic Study of Photocatalytic Degradation of Malachite Green Dye Using MnO2 Nanoparticles as Catalyst

Synthesis, Characterization, Kinetic and Thermodynamic Study of Photocatalytic Degradation of Malachite Green Dye Using MnO2 Nanoparticles as Catalyst

Synergistic photocatalysis: harnessing WSe2-ZnO nanocomposites for efficient malachite green dye degradation

Synergistic photocatalysis: harnessing WSe2-ZnO nanocomposites for efficient malachite green dye degradation

Fabrication of lanthanum-ferrite perovskite oxide (LaFeO3) using Terminalia arjuna leaf extract for the efficient photocatalytic degradation of malachite green

ABO3-resembled perovskite oxides have been extensively used for heterogeneous catalysis and energy storage applications. In current work, lanthanum-ferrite (LaFeO3) perovskite oxide (PO) has been prepared using Terminalia arjuna (TA) leaf extract followed by evaluation of its degradation efficacy against malachite green (MG) under UV-light. Synthesized PO was analyzed using different state of the art analytical techniques. FTIR peaks appearing at 3608, 645, and 552 cm−1 evident the formation of PO while in UV–Visible spectrum absorption band at 420 nm confirmed the same. The crystallinity of the synthesized PO was determined through XRD which confirmed hexagonal structure having crystallite size about 25.78 nm and FESEM exhibited seaweed-like morphology of PO. The results of dye degradation studies have shown excellent percentage degradation (88.7 %) of MG in the presence of PO and the reaction followed zero-order kinetics. Effect of different factors on degradation of MG dye was also recorded and possible mechanism of dye degradation has also been presented. On the basis of current study, authors have concluded that lanthanum-ferrite LaFeO3 perovskite oxide can be synthesized employing green method with efficient dye degradation potential. The results will be helpful in designing and synthesizing ABO3-resembled perovskite oxides using green method based on plant extract.

Fungal decolorization of toxic Triphenylmethane dye by newly isolated Ganoderma fungi: Growth, enzyme activity, kinetics

White-rot fungi have proven their ability to release ligninolytic enzymes for degrading textile dyes. In the present study, ten new strains of the Ganoderma fungi (6001 to 6010) isolated from Hyrcanian forests in Iran were employed to decolorize Malachite Green (MG) as a toxic textile dye. Two isolates, 6009 and 6007, showed the fastest growth and dye decolorization for solid and liquid media, respectively. The strain 6009, identified as Ganoderma resinaceum, completely degraded MG (> 99 %) within two weeks. The results showed that only the laccase enzyme was present in the media, where its activity in the absence and presence of the MG was 2186 and 1787 U/L, respectively. The second-order model was best fitted to the kinetics of the MG dye decolorization. The performance of G. resinaceum in this study showed that this strain could be successfully used for the fungal degradation of MG dye.

Microwave synthesized N-doped carbon dots for dual mode detection of Hg(II) ion and degradation of malachite green dye

One of the most intriguing materials today is carbon dots, which offer a variety of possible uses owing to their distinct photophysical and chemical characteristics. The current study examines the electrochemical and photochemical aspects of carbon dots produced in a single pot for environmental sustainability. Domestic microwave-assisted pyrolysis of urea and glucose yielded chemically synthesized nitrogen-doped carbon dots (microwave synthesized N-doped carbon dots (M-NCDs)) with blue fluorescence and a quantum yield of 14.9 %. High water dispersibility, stability, and biocompatibility were the significant attributes of synthesized M-NCDs. Customarily fluorescent carbon dots were initially used for sensing studies. Fluorescent and electrochemical studies manifest the excellent stability, sensitivity, and selectivity of M-NCDs for mercuric ions. Both methods' Hg (II) procure detection limits of 3.5 nM and 6.1 nM. In addition to sensing traits, the subsequent section deals with the potential of M-NDCs to bring about the exhaustive degradation of malachite green (MG) dye. Within 60 min, 98 % of the dye was catalytically degraded by M-NCD by first-order kinetics based on the Langmuir-Hinshelwood model. This is the first time reporting the catalytic degradation of malachite green dye utilizing carbon dot in its natural form rather than being doped with any metal atom or converted to any composite form.

Synthesis of strontium oxide-zinc oxide nanocomposites by Co-precipitation method and its application for degradation of malachite green dye under direct sunlight

Photocatalysts workable under direct sunlight are the safe and cost-effective option for water purification. The nanocomposites of strontium oxide and zinc oxide (SZ NCs) were synthesized using coprecipitation method. The respective precursors of SZ NCs were subjected to alkaline hydrolysis and subsequently thermally treated to yield SZ NCs. The SZ NCs with different ZnO composition was synthesized by varying the concentration of ZnO precursor from 0.2 to 1 M. The structural properties of SZ NCs evaluated using X-Ray diffraction (XRD), Thermogravimetric analysis (TGA), and Differential thermal analysis DTA). The optical properties of SZ NCs studied using ultraviolet–visible (UV–Vis) spectroscopic study. The trend observed in the intensity of XRD peaks indicated the occurrence of Zn doping in the crystalline lattice of SrO and the formation of SrO–ZnO composite. Upon incorporation of 1 M of ZnO precursor, the grain size of the SrO was decreased from 49.3 to 27.6 nm. The weight loss in the thermal analysis indicates the removal of carbonates from the sample upon heating and shows the formation of an oxide structure. UV–Vis spectra confirmed that the presence of SrO enhanced the sunlight absorption of SZ NCs. The increase in the composition of ZnO precursors increased the bandgap of SrO (2.09 eV) to the level of ZnO (3.14 eV). SZ NCs exhibited heterostructure morphology, where the nanosized domains with varying shapes (layered and rod-like) were observed. Under direct sunlight conditions, SZ NCs prepared using 1 M/0.6 M of SrO/ZnO precursors exhibited 15–20 % higher photocatalytic efficiency than neat SrO and ZnO. In precise, 1 mg of this SZ NC was degraded 98 % of malachite green dye dissolved in water (10 ppm) under direct sunlight. Additionally, the thermal stability results showed that 18 % decomposition was obtained due to the degradation impurities in SrO/ZnO catalysts and the XRD results revealed that no structural change is obtained in SrO/ZnO photocatalysts after stability test. The SZ NCs can be effectively used as safe and economic sunlight photocatalysts for water purification in remote areas without the electricity.

Efficient malachite green biodegradation by Pseudomonas plecoglossicide MG2: process optimization, application in bioreactors, and degradation pathway

Microbial degradation of synthetic dyes is considered a promising green dye detoxification, cost-effective and eco-friendly approach. A detailed study on the decolorization and degradation of malachite green dye (MG) using a newly isolated Pseudomonas plecoglossicide MG2 was carried out. Optimization of MG biodegradation by the tested organism was investigated by using a UV–Vis spectrophotometer and the resultant degraded products were analyzed by liquid chromatography–mass spectrometry and FTIR. Also, the cytotoxicity of MG degraded products was studied on a human normal retina cell line. The optimum conditions for the significant maximum decolorization of MG dye (90–93%) by the tested organism were pH 6–7, inoculum size 4–6%, and incubation temperature 30–35 °C, under static and aerobic conditions. The performance of Pseudomonas plecoglossicide MG2 grown culture in the bioreactors using simulated wastewater was assessed. MG degradation (99% at 100 and 150 mg MG/l at an optimal pH) and COD removal (95.95%) by using Pseudomonas plecoglossicide MG2 culture were the best in the tested culture bioreactor in comparison with that in activated sludge or tested culture-activated sludge bioreactors.The FTIR spectrum of the biodegraded MG displayed significant spectral changes, especially in the fingerprint region 1500–500 as well as disappearance of some peaks and appearance of new peaks. Twelve degradation intermediates were identified by LC–MS. They were desmalachite green, didesmalachite green, tetradesmalachite green, 4-(diphenylmethyl)aniline, malachite green carbinol, bis[4-(dimethylamino)phenyl]methanone, [4-(dimethylamino)phenyl][4-(methyl-amino)phenyl]methanone, bis[4-(methylamino)phenyl]methanone, (4-amino- phenyl)[4-(methylamino)phenyl]methanone, bis(4-amino phenyl)methanone, (4-amino phenyl)methanone, and 4-(dimathylamino)benzaldehyde. According to LC–MS and FTIR data, two pathways for MG degradation by using Pseudomonas plecoglossicide MG2 were proposed. MG showed cytotoxicity to human normal retina cell line with LC50 of 28.9 µg/ml and LC90 at 79.7 µg/ml. On the other hand, MG bio-degraded products showed no toxicity to the tested cell line. Finally, this study proved that Pseudomonas plecoglossicide MG2 could be used as an efficient, renewable, eco-friendly, sustainable and cost-effective biotechnology tool for the treatment of dye wastewater effluent.

Sonochemically prepared bismuth doped titanium oxide-reduced graphene oxide (Bi@TiO2-rGO) nanocomposites for effective visible light photocatalytic degradation of malachite green

In the present work, rGO (reduced graphene oxide) was used as a support material for the preparation of Bi@TiO2-rGO nanocomposites with uniform morphology with using ultrasound assisted process. Bi@TiO2-rGO nanocomposites samples at various loading of Bi were prepared by a facile sol-gel method assisted by ultrasound waves and their performance was compared with nanocomposites prepared by conventional stirring method. Formation of Bi and Ti based nanoparticles supported with rGO sheet was confirmed by scanning electron microscopy. The successful incorporation of rGO, Bi and Ti in Bi@TiO2-rGO nanocomposites was confirmed by XRD, Raman spectroscopy and EDAX. The XRD study showed phases corresponding to Bi, Ti and rGO and indicated the formation of crystalline Bi@TiO2-rGO nanocomposite. From the morphological analysis of nanocomposites, uniformly decorated layered morphology was observed. XRD and Raman analyses confirmed the presence of Bi, Ti and formation of rGO during preparation of Bi@TiO2-rGO nanocomposite using ultrasound assisted and conventional method. Prepared Bi@TiO2-rGO nanocomposite was applied for the degradation of malachite green dye. The photocatalytic degradation experiments were carried out in sunlight using Bi@TiO2-rGO nanocomposites prepared with varied loading of Bi using ultrasound and conventional method. At the optimum condition, degradation was found to be 93.34 % in sunlight.

BiOCl/SrHA nanoparticle for photocatalytic degradation of a malachite green dye

In this research, we discuss the removal of malachite green dye by strontium hydroxyapatite supported BiOCl.  A modified hydrolysis model, one can synthesise BiOCl/SrHA. BiOCl/SrHA was characterized using  Fourier transform-infrared spectroscopy (FTIR), UV-visible (UV-vis) analysis, X-ray diffraction (XRD), energy diffraction X-ray (EDX),  and scanning electron microscopy (SEM). SEM outcome confirmed the dispersion of BiOCl onto strontium hydroxyapatite. The shape of the BiOCl catalytic samples overlapped with each other to form 3D hierarchical flower-like structures. The UV-visible was used as a radiation source during photocatalysis.  BiOCl/SrHA had an effect on malachite green dye degradation. The oxidative removal occurred through hydroxyl radical formation. UV-visible (UV-vis) /BiOCl/SrHA showed perfect photocatalytic property for the decay of malachite green (MG) from an aqueous solution. According to kinetics analysis, the dye degradation rates could be in a pseudo-first-order model.

Biogenic synthesis of highly fluorescent carbon dots using Azadirachta indica leaves: An eco-friendly approach with enhanced photocatalytic degradation efficiency towards Malachite green

A simpler and efficient method has been developed for the green synthesis of highly fluorescent carbon dots (CDs) from Azadirachta Indica leaves. The surface morphology of developed CDs has shown the existence of spherical particles in the size range of 3–8 nm with superior biocompatibility and high quantum yield value i.e. 42.3%. The particles exhibited a highly fluorescent and crystalline nature along with a bandgap value of 4.02 eV. The prepared CDs served as a factorial design for the sensing and degradation of Malachite green among other dyes. The main perspective of the current finding is that the designed catalyst exhibits excellent sensing results towards Malachite green with a limit of detection i.e. 0.144 μM in the concentration range of 0–50 μM. Moreover, the UV triggered results of photocatalysis illustrated a good dye removal efficacy by developed CDs with an average of 90.73, 98.25, 52 and 6.13% degradation in Methylene blue (MB), Malachite green (MG), Rhodamine 6G (Rh 6G) and Methyl orange (MO) upon 70 min of irradiation with mercury lamp. Additionally, the proton NMR, FTIR and FESEM results of the recycled samples also confirm the complete degradation of MG dye with the application of N-CDs.

Enhanced Photocatalytic Degradation of Malachite Green Dye Using Silver-Manganese Oxide Nanoparticles.

Efficient and excellent nanoparticles are required for the degradation of organic dyes in photocatalysis. In this study, silver-manganese oxide nanoparticles (Ag-Mn-NPs) were synthesized through a wet chemical precipitation method and characterized as an advanced catalyst that has enhanced photocatalytic activity under sunlight irradiation. The nanoparticles were characterized using scanning electron microscopy (SEM), XRD, UV-vis light spectra, and energy-dispersive X-ray (EDX) spectroscopy, revealing their spherical and agglomerated form. The EDX spectra confirmed the composition of the nanoparticles, indicating their presence in oxide form. These bimetallic oxide nanoparticles were employed as photocatalysts for the degradation of malachite green (MG) dye under sunlight irradiation in an aqueous medium. The study investigated the effects of various parameters, such as irradiation time, catalyst dosage, recovered catalyst dosage, dye concentration, and pH, on the dye's photodegradation. The results showed that Ag-Mn oxide nanoparticles exhibited high photocatalytic activity, degrading 92% of the dye in 100 min. A longer irradiation time led to increased dye degradation. Moreover, a higher catalyst dosage resulted in a higher dye degradation percentage, with 91% degradation achieved using 0.0017 g of the photocatalyst in 60 min. Increasing the pH of the medium also enhanced the dye degradation, with 99% degradation achieved at pH 10 in 60 min. However, the photodegradation rate decreased with increasing dye concentration. The Ag-Mn oxide nanoparticles demonstrate excellent potential as a reliable visible-light-responsive photocatalyst for the efficient degradation of organic pollutants in wastewater treatment.

Bismuth oxyiodide nanocomposites supported on strontium hydroxyapatite enhance UV-Vis light-driven photocatalytic activity

In this research, we discuss the removal of basic fusion (BF), and crystal violet (CV) dyes by strontium hydroxyapatite supported BiOI. In a modified hydrothermal model, one can synthesize BiOI/SrHA. BiOI/SrHA was characterized using Fourier transform-infrared spectroscopy (FTIR), UV-visible (UV-vis) analysis, X-ray diffraction (XRD), energy diffraction X-ray (EDX), and scanning electron microscopy (SEM). SEM outcome confirmed the dispersion of BiOI onto strontium hydroxyapatite. The shape of the BiOI catalytic samples overlapped with each other to form 3D hierarchical flower-like structures. The UV-visible was used as a radiation source during photocatalysis. BiOI/SrHA had an effect on malachite green dye degradation. The oxidative removal occurred through hydroxyl radical formation. UV-visible (UV-vis) BiOI/SrHA showed perfect photocatalytic property for the decay of Basic Fuchsin (BF) and Crystal Violet (CV) from an aqueous solution. According to kinetics analysis, the dye degradation rates could be in a pseudo-first-order model

BiFeO3-PDMS hybrids: Development of visible-active floating photocatalysts with minimal catalyst loading.

Recent advances in photocatalysis include the development of floating catalysts since they assure efficient and rapid recollection of the catalysts from the purified liquid, besides enhancing the availability of photons at the catalytic surface. Bismuth ferrite (BiFeO3 and BFO) is a multifunctional perovskite material renowned for its excellent photocatalytic properties. Since bandgap of BFO falls in the visible spectrum, BFO nanoparticles could be combined with a suitable floating substrate to develop efficient visible light photocatalysts. Here, we report the synthesis of BFO-polydimethylsiloxane (PDMS) hybrids for photocatalytic applications, where sol-gel-synthesized BFO nanoparticles are immobilized on a floating porous PDMS sponge. The successful incorporation of the nanoparticles on PDMS is confirmed using Raman spectroscopy, scanning electron microscopy, and energy dispersive x-ray spectroscopy. The photocatalytic activity of the floating catalysts was studied by monitoring the degradation of malachite green dye under visible light irradiation. The effect of the amount of BFO immobilized, and the area and thickness of the PDMS sponge on the photocatalytic activity of the floating catalysts were investigated. An efficiency of 80.5% was obtained when the weight of BFO immobilized on the PDMS sponge was 5 mg. The method yields degradation efficiencies comparable with or higher than that of conventional BFO powder catalysts, even with 6-18 times less catalyst loading. The method introduces the fabrication of recyclable floating photocatalysts of notable efficiency using significantly less amount of BFO nanoparticles, which could be further modified by approaches such as doping, functionalization, or composite formation.

Photocatalytic efficiency of PVDF based binary and ternary nanocomposites of metal sulfides: A comparative study

Our present research work aims in providing a simple and economical technique of developing an efficient visible light active photocatalyst. Polyvinylidene fluoride (PVDF) based binary and ternary nanocomposites of metal sulfide nanostructures namely ZnS/PVDF and ZnS/CdS/PVDF were synthesized using a simple solvent casting technique. The photocatalytic efficiencies of the prepared composite films were studied towards the degradation of Malachite green dye under UV and visible light irradiation. Effective incorporation of nanomaterial fillers on the PVDF matrix was confirmed by X-Ray Diffraction (XRD), Scanning Electron Microscopy (SEM), Energy Dispersive X-ray (EDX), Fourier Transform Infrared (FTIR) and UV–Vis Diffused Reflectance spectroscopy. The energy band gap of ZnS/PVDF and ZnS/CdS/PVDF, calculated using the Kubelka Munk Function from the Reflectance data were observed to be 3.64 eV and 2.52 eV respectively. Photodegradation studies show that ternary nanocomposite is a better photocatalyst as compared to binary nanocomposite under both UV and visible light irradiation.

Optimization of photocatalytic degradation of malachite green using nano-scaled V/CeO2-functionalized steel-slag-based catalyst by response surface design approach

The utilization of steel slag with high added value is an important means for sustainable development of the iron and steel industry and environment. A new nano-scaled V/CeO2-functionalized steel-slag-based catalyst (V/CeO2-SC) was prepared. The XPS results revealed that V was embedded in the CeO2 lattice with V4+ and V5+ forms. The regression equation analysis of variance told that the order of influencing factors on malachite green dye degradation rate is: catalyst dosage > V doping amount > malachite green dye concentration. The optimum values of the parameters were dye concentration 10 mg/L, catalyst dosage 0.1 g, and V doping amount 1wt%. Under the optimal condition, the predicted and actual response values of the degradation rate of malachite green dye were 100.00%. UV–Visible light absorption spectroscopy results demonstrated that after the photocatalytic degradation reaction, the absorption peak of the malachite green dye solution almost completely disappeared, indicating that the malachite green dye solution was almost completely degraded. The excellent degradation activity of the 1V/CeO2-SC specimen was attributed to the co-action of the high SBET, large mesoporous volume, and the coupled semiconductors formed by V-doped CeO2 and FeO in the catalyst carrier. A possible photocatalytic degradation mechanism of the V/CeO2-SC specimen was proposed.