Degradation Rate Of Rhodamine Research Articles

Facile Fabrication of F-Doped SnO2 Nanomaterials for Improved Photocatalytic Activity

Non-metal doping introduces structural defects, which alter the metal oxide band gap, resulting in high photocatalytic performance. Herein, a F doped SnO2 was synthesized via a simple solvothermal method. Through adjusting the solvothermal time, surfactants and F doping ratio, the optimal sample was prepared. In addition, the as-prepared nano-powder was characterized and analyzed by X-Ray-Diffraction (XRD), Scanning Electron Microscope (SEM), Energy Disperse Spectroscopy (EDS) and Fourier Transform Infrared Spectrum (FT-IR). Interestingly, the results of photocatalytic degradation showed that the degradation rate of rhodamine B (Rh B) reached 92.9% in 25 min after a 5-hour solvent heat treatment with polyethylene glycol (PEG) surfactant and F doping ratio of n(F):n(Sn) = 1:15. Through the study of photocatalytic performance, we found that F-doped SnO2 has high photocatalytic activity during a short time and its development potential in the field of photocatalysis, which provides a strong support for our further study of its practical application.

Impact of graphene oxide on visible light photocatalytic performance of graphene oxide/graphitic carbon nitride three-dimensional structure composites

ABSTRACT The non-metallic catalyst graphitic carbon nitride (g-C3N4) has attracted a significant amount of attention due to its excellent photocatalytic performance. The photocatalytic performance of g-C3N4 has been further enhanced by the incorporation of graphene oxide (GO) as a composite catalyst. However, the enrichment and recovery of these two-dimensional composites after photocatalysis is still a difficult challenge. In this work, a visible light responsive graphene oxide/graphitic carbon nitride coated sponge three-dimensional composite (PU-GO/g-C3N4) was prepared by electrostatic self-assembly using polyurethane sponge (PU) as a skeleton and g-C3N4 as a photocatalyst. The degradation rate of rhodamine B (RhB) under visible light was used as an index to evaluate the photocatalytic performance of PU-GO/g-C3N4. The results demonstrate that during the photocatalytic degradation of RhB by PU-GO/g-C3N4, g-C3N4 is the main photocatalyst, while the holes and the superoxide radicals generated by electron excitation are the main agents. As a bridge connecting PU and g-C3N4, GO improves the agglomeration phenomenon of g-C3N4 on PU. Meanwhile, GO has excellent carrier mobility and inhibits the recombination of photogenerated electrons and holes. Moreover, the presence of GO enhances the absorption of light and dyes. Overall, the addition of GO effectively enhances the photocatalytic performance of PU-GO/g-C3N4 due to it enhances dye absorption, improves light energy utilization rate, and expedites transfer of photogenerated electrons. After 5 cycles, PU-GO/g-C3N4 still exhibits an RhB degradation rate of 92.06%, demonstrating good stability and recycling performance. This material shows great promise for practical environmental remediation applications.

Novel catalytic self-cleaning membrane with peroxymonosulfate activation for dual-function wastewater purification: Performance and mechanism

The integration of in-situ chemical oxidation (ISCO) and membrane separation technology (MST) was appealing for one-step efficient removal of complex dye-contaminated oily wastewater. However, the construction of catalytic membranes remains an arduous challenge due to the critical restriction of unsatisfactory degradation and poor stability. In current work, manganese dioxide (MnO2)/carboxyl functionalized carbon nanotube (C-CNT) composites were prepared through a facile hydrothermal process. It was found that, the degradation rate of rhodamine B (Rh B, 100 ppm) in MnO2/C-CNT (0.2 g/L)/peroxymonosulfate (PMS, 0.5 g/L) system reached 2.071 min−1, which was 4.6 and 10.9 times higher than that of MnO2 and C-CNT (0.4541 and 0.1942 min−1), respectively. The vacuum-assisted filtration was utilized to construct MnO2/C-CNT@ polyvinylidene fluoride (PVDF) membrane, which exhibited excellent filtration catalytic activity and stability for dyes and natural small-molecular organics. Scavenger experiments and electron paramagnetic resonance (EPR) analysis verified the synergistic effect of radicals and nonradicals while 1O2 was the dominator for Rh B degradation. The MnO2/C-CNT@PVDF membrane also possessed high permeation flux (170.2 L/(m2·h)), separation efficiency (99.5%) and anti-oil properties for filtrating n-hexane/water emulsion. Moreover, the modified membrane could achieve the dual purification for one-step catalytic degradation of dyes and oil/water separation. Meanwhile, the flux recovery rate of the prepared membrane reached 91% after filtering the PMS solution for 10 min, indicating its brilliant self-cleaning performance. This study provided a novel insight into development of dual-function catalytic self-cleaning membranes for water treatment.

Study on preparation, photocatalytic performance and degradation mechanism of polymeric carbon nitride/Pt/nano-spherical MoS2 composite

In this paper, a visible light-driven polymeric carbon nitride (PCN)/(Pt)/nano-spherical MoS2 photocatalysts was prepared using a self-assembly method. The structure of photocatalysts was explored by FT-IR, XPS, XRD, BET, SEM and TEM. Meanwhile, the energy band structure and electron hole separation efficiency were also analyzed by UV–Vis and PL spectra. In addition, the photocatalytic performance of photocatalysts were tested by photocatalytic degradation of Rhodamine B and photocatalytic hydrogen evolution. The results showed that PCN/2.0%MoS2 showed the best photocatalytic performance, and the degradation rate of Rhodamine B could reach 98.39% within 150 min. Besides, the introduction of Pt nanoparticles significantly improved the photocatalytic activity. The degradation rate of Rhodamine B reached 100% within 150 min, and the rate of photocatalytic hydrogen production of PCN/Pt/MoS2 system was increased by 21.3% over the PCN/2.0%MoS2 system. The separation mechanism of electron and hole is Z-scheme mechanism and the main active substances for photocatalytic degradation were ·O2− and h+.

Construction of ZnO/Keggin Polyoxometalate Nano-heterojunction Catalyst for Efficient Removal of Rhodamine B in Aqueous Solution

Rational design of nano-heterojunction catalyst is one of the ideal ways to solve dye pollution effectively. In this study, two nano-heterojunction catalysts ZnO/Ag4SiW12O40 (ZnO/AgSiW) and ZnO/Cs3PW12O40 (ZnO/CsPW), were synthesized by the simple dissolution and precipitation method. The samples were characterized by XRD, TEM, FT-IR, Raman, DRS, XPS and N2 adsorption and desorption isotherms. The photocatalytic experiments show that the degradation rates of Rhodamine B (RhB) by ZnO/AgSiW and ZnO/CsPW within 60 min are 92.3 and 72.7%, respectively, which are 5.3 and 4.2 times higher than that by pure zinc oxide. The two catalysts still maintain excellent performance after repeated use for three times. Based on the free radical capture experiment, the active substances that play a major role in the photocatalytic process were determined. In addition, the electrochemical tests show that the construction of a nano-heterojunction system significantly increases the separation efficiency of photogenerated carriers in the heterojunction system. The possible photocatalytic degradation pathways and final products of ZnO/AgSiW and ZnO/CsPW heterojunction nanocomposite catalysts were analyzed by the liquid chromatography/mass spectrometry (LC/MS) technique. This paper provides a theoretical and experimental basis for treating organic dyes by ZnO/AgSiW and ZnO/CsPW nano-heterojunction catalysts.

Synthesis of polypyrrole-modified Fe3O4/SiO2/TiO2 nanocomposite microspheres and their photocatalytic activity

A polypyrrole-modified Fe3O4/SiO2/TiO2 composite material was successfully synthesized on the FST surface by in situ polymerization of pyrrole. Structural, morphological and magnetic response of Fe3O4/SiO2/TiO2/PPy(FST/PPy) were characterized by transmission electron microscopy, scanning electron microscopy, X-ray diffraction pattern, Fourier transform infrared spectroscopy and energy-dispersive X-ray spectroscopy, etc. Through SEM images, the crystal sizes of the prepared FST/PPy nanoparticles were determined to be about 110 nm. The catalytic activity of FST/PPy was evaluated by the degree of decomposition of rhodamine B under ultraviolet and visible light, respectively. FST/PPy had the photocatalytic activity under the action of the light: the degradation rate of rhodamine B reached 92.8% and 63.5% after 3 h of UV and Vis light irradiation, respectively. Especially, compared with FST, the degradation rate has shown obvious improvement under the action of Vis light. Furthermore, FST/PPy photocatalyst could be easily recycled using a magnet.

Visible light-driven photocatalytic and enzyme-like properties of novel AgBr/Ag2MoO4 for degradation of pollutants and improved antibacterial application

The manufacture of multiple catalytic materials is an important matter to solve environmental pollution and bacterial infection. AgBr/Ag2MoO4 nanoparticles with different molar ratios were prepared by a simple one-step precipitation method. The morphology and component of AgBr/Ag2MoO4 were analyzed by several characterizations means including XRD, XPS, and SEM et al., which showed that the loaded content of AgBr was different in different molar ratios. 1:1AgBr/Ag2MoO4 displayed better enzyme-like activity than that of the pure AgBr and Ag2MoO4. It can depict that 1:1AgBr/Ag2MoO4 possessed excellent photocatalytic activity with a 100% degradation rate of rhodamine B, and nearly 80% degradation rate of tetracycline hydrochloride. ∙O2– can be produced from the enzyme reaction system and the photocatalytic system, and ∙OH can be generated under visible light, which can successfully kill Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus). The sterilization rate of AgBr/Ag2MoO4 with visible light and H2O2 achieved 100% in a short time toward E. coli and S. aureus. The AgBr/Ag2MoO4 composite, as the bactericidal catalyst, with dual catalytic activities is a promising material in the field of environmental pollution and bacterial infection.

Fabrication of ZSM-5 zeolite supported TiO2-NiO heterojunction photocatalyst and research on its photocatalytic performance

Photocatalytic ability and adsorbability are both critical factors for photocatalysts, the two factors may influence photocatalytic performance in practical application. Herein, ZSM-5 zeolite was used as carrier to support TiO2-NiO (p-n) heterojunction to prepare the TiO2-NiO/ZSM-5 photocatalyst. In this compound, TiO2-NiO heterojunction with a special inner electric field can efficiently retard the recombination rate of electrons and holes, ZSM-5 zeolite with a large specific surface area can greatly improve adsorbability. The results indicated that TiO2-NiO/ZSM-5 indeed improved the photocatalytic performance and the degradation rate of Rhodamine B (Rh-B) can reach 94.5% under ultraviolet light after 90 ​min. After five cycles, the degradation rate of Rh-B still reaches 85%, indicating it has excellent stability. Furthermore, the trapping experiment and DMPO spin-trapping experiment revealed that ·O2− is the chief active substance in the degradation of Rh-B. Consequently, this study provides a novel approach to developing a potential photocatalyst to treat water pollution.

Study on the Preparation of Zn-Doped NaA Molecular Sieve and Its Photocatalytic Performance

Zn-doped NaA molecular sieves were prepared by hydrothermal method using zinc nitrate, sodium metaaluminate, silica sol, etc. as raw materials. The samples were characterized by XRD, SEM, FT-IR, etc., using 300W xenon lamp as the light source. Rhodamine B (RhB) was used as the target degradant for photocatalytic experiments for its photocatalytic activity. The results showed that zinc ion doping increased the number of active sites on the NaA molecular sieve, effectively reduced the photoelectron-hole recombination probability in the molecular sieve, and improved the photocatalytic activity. The degradation rate of rhodamine B was 50.8% after 2 hours of light exposure, and its photocatalytic process complied with the Langmuir-Hinshelwood first-order kinetic equation.

Photocatalytic Degradation of Rhodamine B and Malachite Green by Cobalt Sulfide Nanoparticles

Present study reports the simple and cost effective thermolytic method for the synthesis of cobalt sulphide nanoparticles (CoS NPs). The PXRD spectrum of cobalt sulphide (CdS) nanoparticles exhibited four peaks indexed to (100), (101), (102) and (110) crystal planes. The average particle size observed from DLS and PXRD was in the range 4.81-12.20 nm. A blue shift in band gap was observed from UV-visible spectra. The FESEM and TEM studies revealed that cobalt sulfide nanoparticles are of cubic and rectangle shapes. FTIR spectra of hexadecylamine (HDA) capped CoS NPs exhibited ν(N-H) absorption around 3350-3240 cm–1. The stretching frequency due to ν(Co-S) appeared in the region 334-332 cm–1. Proton NMR (1H) spectra of CoS NPs showed signals at nearly same positions as in case of capping agent, suggesting its capping nature. ESI-MS analyses of cobalt sulphide nanoparticles displayed peak at m/z = 124.93 corresponding to the [CoS2]+ ion. Thermogravimetric curves showed single step decomposition corresponding to 84.28% weight loss and 15.72% as final residue due to cobalt oxide. The degradation rate of rhodamine B and malachite green dyes after irradiating with sunlight showed 92-94% degradation while irradiated with UV-light of 4.8 eV show much slower degradation rate.

Synthesis and photocatalytic mechanism of visible-light-driven Ag/AgBr/(I/S) composites for organic dyes degradation

Series of visible light responsive Ag/AgBr/(I/S) composites based on I/S were synthesized by deposition-precipitation method. Methyl orange (MO) and other organic dyes were used to evaluate the photoactivity of Ag/AgBr/(I/S) composites. The results showed that Ag/AgBr/(I/S) composites display a good photocatalytic activity for organic dyes degradation. As the content of Ag/AgBr was 25 wt%, Ag/AgBr/(I/S) composites exhibited the best the photocatalytic activity for organic dyes. The degradation rate of Rhodamine B (RhB) and MO were 90% and 92% after 20 min. Furthermore, cycling experiments revealed that the 25%Ag/AgBr/(I/S) composites had long-term recycling stability. The photocatalytic mechanism of Ag/AgBr/(I/S) composites to MO degradation was studied by free radical trapping experiments and electron paramagnetic resonance (EPR) test, which indicating that photogenerated ·O2− is the dominant reactive specie.

Interface template synthesis of zein-based amorphous TiO2 composite microcapsules with enhanced photo-catalysis

In order to further enhance the application field of zein-based microcapsule. Zein-based amorphous TiO2 composite microcapsules (ZTCMs) were innovatively prepared from zein, tetra butyl ortho titanate (TBOT) and PEO106PPO70PEO106 (F127) via interface template synthesis. The Effects of TBOT amount on ZTCMs structures and photo-catalytic performances were mainly investigated. Chemical structure and microstructure of the obtained composite microcapsules were characterized mainly by fourier-transform infrared spectroscopy (FTIR), transmission electron microscope (TEM), scanning electron microscope (SEM) and energy disperse spectroscopy (EDS). The results show ZTCMs exhibited evident hollow structure with titanium dioxide (TiO2) wrapped in the outer layer. The average size of ZTCMs300 was approximately 4 µm, which increased as the increase of TBOT dosage. Significantly, ZTCMs showed excellent photo-catalytic ability on dyes, red wine and coffee alike. The degradation rate of Rhodamine B (RB) was more than 80% after irradiation for 5 h under sunlight. This study provides a facile method to fabricate natural-based photo-catalytic material, which will be a good candidate in many fields such as medicine, food packaging, leather and textile.

Peroxymonosulfate activation by recycling of discarded cigarette filters: Selective degradation of contaminants

BackgroundThe conversion of waste biomass into multi-hole carbon materials is an effective way in recent years. A new type of biochar was prepared by one-step calcination method by utilizing used cigarette filter (UCF) as raw material. In addition, we investigated the catalytic degradation properties of UCF, as well as the degradation mechanism. MethodsThe catalytic degradation properties of the material were verified by degradation experiments. The morphology of the material, and the microstructural state, were analyzed by SEM (Scanning Electron Microscope) and HRTEM (High Resolution Transmission Electron Microscopy). Using Raman, XRD (X-ray diffraction), BET, XPS (X-ray photoelectron spectroscopy) studied the structure and chemical composition of the material. The degradation mechanism was analyzed by quenching experiments and EPR (Electron Paramagnetic Resonance), XPS. Significant findingsThe first, UCF completely removed 0.01 g L−1 Rhodamine B within 80 min. And, degradation rate of Rhodamine B is as high as 95% within 20 min. Some defects were observed, and the dominant microporous structures and high specific surface area were present. The heteroatom in the UCF effectively activated the sp2-hybridized carbon crystal lattice, leading to the creation of more activation sites in UCF. Different carbide temperatures also affected the degree of material graphitization, and UCF (700 °C) had rich defects and larger porous structures. Besides, Electron paramagnetic resonance and quenching experiments showed that UCF degradation systems acted via free and non-radical pathways. The mechanism of catalytic degradation and the reasonable source of heterogeneous atoms at the catalytic site were also proposed. The use of the discarded cigarette filter as a low-cost catalyst for persulfate has great potential.

SYNTHESIS OF MIXED-METAL MIL(Ti-Fe) FROM VIETNAM ILMENITE ORE AND ITS APPLICATION FOR DEGRADATION OF DYE

In this work, the mixed-metal metal-organic frameworks MIL(Ti-Fe) were synthesized by the hydrothermal method. MIL(Ti-Fe) hybrid material was fabricated from ilmenite ore and 1,3,5-benzene tricarboxylic acid at a temperature of 130 oC for 24 hours. The prepared material was characterized by using scanning electron microscopy (SEM), X-ray diffraction (XRD), infrared spectroscopy (IR), and Brunauer-Emmett-Teller (BET) surface area. The obtained MIL(Ti-Fe) particles have a diameter of from 0.2-1.0 µm with a BET surface area of 85.482 m2 g-1. The influence of various vital parameters such as pH of the dye solution, initial dye concentration, adsorption time, and amount of the catalyst on the dye removal efficiency was investigated. The photocatalytic degradation rate of Rhodamine B was found to be 0.0074 min-1 at pH 7. The maximum removal of Rhodamine B was obtained at the catalyst dose of 1.0 g L-1. Under simulated sunlight irradiation, the resultant mixed-metals MOFs showed high photodegradation toward Rhodamine with degradation efficiency of approximately 99,97% after 6 hours. Furthermore, the resultant materials also showed remarkable absorption behavior toward Rhodamine B with the adsorption capacity of 70 mg g-1.

Fast preparation of oxygen vacancy-rich 2D/2D bismuth oxyhalides-reduced graphene oxide composite with improved visible-light photocatalytic properties by solvent-free grinding

Bismuth oxyhalides (BiOX, X = Cl, Br, I) exhibit excellent photocatalytic activity owing to their distinctive layered structures and suitable bandgaps. However, BiOX and its derived composites are usually fabricated via the liquid-phase strategy, which always produces waste liquid, thereby polluting the environment. Recently, BiOX/reduced graphene oxide (RGO) with two-dimensional/two-dimensional (2D/2D) heterostructures have been successfully prepared without using any solvent by one-pot mixing/grinding using chemicals such as bismuth nitrate pentahydrate, potassium halide, graphene oxide (GO), and BH4K. The fabricated BiOX/RGO heterostructures were endowed with oxygen-rich vacancies and a very short fabrication time of 15 min. During the synthesis process, BiOX can grow in situ on the GO due to Bi3+ ions; thus, BiOX could be adsorbed easily on the GO surface, with the negatively charged oxygen-containing functional group. Significantly, BH4K not only reduces GO to RGO but also introduces a suitable concentration of oxygen vacancies (OVs) in BiOX, which can photo-induce the carrier separation efficiency and effectively improve visible-light absorption. BiOX/RGO with a 2D/2D heterojunction structure provided a higher specific surface area and a larger heterogeneous interface and transferred photogenerated electrons regularly. Owing to the dual synergistic effects of the aforementioned features, BiOX/RGO can produce more active substances (h+, •OH, and •O2−) for the photodegradation of organic pollutants. The results showed that the photocatalytic performance of BiOCl/RGO, BiOBr/RGO, and BiOI/RGO was significantly improved as the degradation rate of Rhodamine B (RhB) under visible-light irradiation was 6, 3, and 2 times higher than that of pure BiOCl, BiOBr, and BiOI, respectively. Furthermore, BiOX/RGO displayed a similar enhanced photocatalytic effect on tetracycline degradation. Therefore, this work provides a versatile, green, and fast method to synthesize BiOX/RGO composites for the photodegradation of different organic pollutants.

Black Talc-Based TiO2/ZnO Composite for Enhanced UV-Vis Photocatalysis Performance.

Herein, using black talc as a carrier, a ternary black talc-TiO2/ZnO composite photocatalyst was prepared by the sol-gel method, and the effect of the black talc on the hetero-structure properties of the TiO2 and ZnO was systematically studied. The prepared composite photocatalyst showed an excellent degradation performance of the pollutant, where black talc plays an important role in promoting the interface interaction by enhancing the contact area between the TiO2 and ZnO. Moreover, the free carbon element doping in black talc favors the formation of more oxygen vacancies, thereby improving the response as a photocatalyst in visible light. In addition, the carbon in the black talc can also adsorb organic pollutants and enrich the surroundings of the photocatalyst with pollutants, so it further improves the catalytic efficiency of the photocatalyst. Under UV irradiation, the degradation rate of Rhodamine B on black talc-TiO2/ZnO was found 3.3 times higher than that of black talc-TiO2 with good stability.

Preparation of TiO2/Black Talc Composite Photocatalyst and the Research on Its Adsorption-Degradation Coupling Effects.

In this paper, a TiO2/black talc composite photocatalyst was prepared by the sol-gel method using TBOT as titanium source and black talc as carrier. Rhodamine B was used as the targeted pollutant to study the adsorption role of carbon in black talc. The results showed that with the adsorption-degradation cycles, the illumination time can be reduced by 40%. The adsorption rate and degradation rate of the composite photocatalyst was also increased. The degradation rate of Rhodamine B reached more than 95%, which fully shows the synergistic effect between TiO2 nanoparticles and black talc. In this way, the adsorption-degradation coupling of the photocatalyst could be realized.

Fullerene-cored star-shaped polyporphyrin-incorporated TiO2 as photocatalysts for the enhanced degradation of rhodamine B

Highly photoactive fullerene-cored star-shaped polyporphyrin incorporated TiO2, ZnCPP-Fullerol@TiO2, was prepared from the immobilization of fullerene-cored star-shaped polyporphyrin nanospheres, produced by the esterification of carboxyl porphyrin with fullerols, on the surface of TiO2 via the excess hydroxyl groups of fullerols, and used for rhodamine B degradation under light irradiation. The synthesized catalyst was fully characterized by various techniques, including ultraviolet-visible spectroscopy, fluorescence spectroscopy, X-ray photoelectron spectroscopy (XPS), cyclic voltammetry and thermogravimetric analysis etc. The results demonstrated that the insertion of fullerols in ZnCPP-Fullerol@TiO2 produced an enhancement in photocurrent efficiency and the photocatalytic degradation of rhodamine B. The degradation rate of rhodamine B was 94.7% after treatment with light irradiation for 150 min, and the reaction rate constant was k = 0.0193 s−1 for ZnCPP-Fullerol@TiO2. This constant was much higher than that of ZnCPP@TiO2(0.00723 s−1) due to the improvement in the separation of electron-hole pairs and the availability of good sites for adsorption and catalysis. Moreover ZnCPP-Fullerol@TiO2 exhibits excellent reusability, and a reasonable mechanism for the enhanced reactivity was proposed.

Synthesis of BiPO4/SnO2 heterojunction for the photocatalytic degradation of RhB under visible light emitting diode irradiation

AbstractIn this study, BiPO4 was synthesized in ethylene glycol and water as solvents under room temperature. To the BiPO4 suspension, Na2SnO3∙3H2O and hydrochloric acid were added in order to prepare a BiPO4/SnO2 heterojunction composite photocatalyst. Analyses by X‐ray powder diffraction, X‐ray photoelectron spectroscopy, and diffuse reflectance spectroscopy showed that there is a strong chemical bond between BiPO4 and SnO2 as the SnO2 species gets attached to the BiPO4 sheet. Also, the band gap was narrowed, which greatly improved the visible light absorption of the BiPO4/SnO2 composite. The 1:2BiPO4/SnO2 composite showed excellent photocatalytic degradation efficiency. The degradation rate of Rhodamine B was found to be 92.38% in 50 min, and the corresponding reaction rate was estimated to be 80 times greater than that of BiPO4.

Activation of Permonosulfate by Rhodamine B for BPA Degradation Under Visible Light Irradiation

Although the activation method of permonosulfate has been gradually developed, its practical application is severely restricted by the high cost and difficult recovery of the catalyst, thereby resulting in secondary pollution. In this study, the application potential of self-decolorization of dyes and degradation of other pollutants through persulfate(PS) activation was examined by building a self-decolorization system. The results showed that the dyes could activate PS under visible light irradiation, which could realize not only the self-decolorization of dyes, but also the degradation of other pollutants. The degradation rates of rhodamine B and bisphenol A could reach 80% and 90%, respectively. This process included both free radical reaction pathways and nonradical reaction pathways. The active oxidants produced in the system included superoxide radicals, sulfate radicals, hydroxyl radicals, and singlet oxygen. The self-decolorization efficiency of dyes was related to the type of dyes, initial concentration of the dyes, dosage of PS, and initial pH of the solution. Meanwhile, the initial concentrations of the dyes and other pollutants had a great influence on the degradation of other pollutants. This study provides a new idea for economic and environmental protection in the PS activation method, and has broad application prospects in the treatment of printing and dyeing wastewater.