Photocatalytic Degradation Ability Research Articles

2D vermiculite nanofiltration membrane with TiO2 nanoparticles as versatile intercalator for enhanced water purification

Two-dimensional (2D) materials membranes have gained widespread attention for their unique structure and outstanding separation performance. Herein, we developed a 2D vermiculite nanofiltration (TiO2@VMT) membrane using TiO2 nanoparticles as versatile intercalator. The interlayer spacing of vermiculite nanosheets was tuned from 1.352 ± 0.002 nm to 1.424 ± 0.004 nm. As a result, the optimized TiO2@VMT membrane exhibited high water flux of 261 L m−2 h−1, which was 14 times higher than that of vermiculite membrane, simultaneously showed excellent rejections (>98 %) for various organic dyes (molecular weight >374 g mol−1). Due to the photocatalytic degradation ability of TiO2 nanoparticles towards organic foulants, the TiO2@VMT membrane possessed excellent anti-fouling performance, with a flux recovery rate exceeding 90 % under UV radiation after three cycles of filtration experiment using oil-in-water emulsion and BSA solution as model foulants. Accordingly, our work may offer a possible route for the development of 2D nanofiltration membrane for efficient water purification.

Rational Design of Environmentally Friendly Carbon Nanotube Embedded Artificial Vesicle‐Structured Photocatalysts for Organic Pollutants Degradation

AbstractPhotocatalytic degradation is one of the most promising methods for addressing environmental issues without introducing pollution sources. Nonetheless, the majority of works are devoted to explore high‐efficiency semiconductor photocatalysts, but the potential environmental risks in their application are usually neglected. In this work, an environmentally friendly vesicle‐structured photocatalyst is rationally designed by employing magnetic layered double oxide‐hollow spheres@antimony tin oxide as a core, phospholipid as membrane, and carbon nanotubes (CNTs) as channels, yielding a multi‐structural material with robust organic pollutants photocatalytic degradation and mineralization ability. Materials characterization, computational modeling, and cytotoxicity tests suggest that under visible light irradiation, photogenerated charges can be rapidly generated and transfer in the core composite, and H2O2 can be effectively activated to generate hydroxyl radical for organic pollutants rapid degradation. The construction of phospholipid membranes and embedded CNTs not only maintains the photodegradation performance of the material, but also restrains its environmental risk. Such a synthetic approach advances the development of bionic photocatalytic materials.

Au nanoparticles decorated β-Bi2O3 as highly-sensitive SERS substrate for detection of methylene blue and methyl orange.

In this work, Au/Bi2O3 was synthesized by loading Au nanoparticles (NPs) onto β-Bi2O3 by a simple solution reduction method. β-Bi2O3 was synthesized by a precipitation-thermal decomposition procedure, which results in significantly improved SERS detection limits down to 10-9 M for methylene blue (MB) and 10-7 M for methyl orange (MO) as probe molecules, comparable to those reported for the best semiconductor SERS substrates. In particular, further deposition of Au NPs (5.20% wt%) onto β-Bi2O3 results in a two-order-of-magnitude enhancement in detection sensitivity, achieving a detection limit of 10-11 M for MB and 10-9 M for MO. Under ultraviolet/visible irradiation, the Au/Bi2O3 hybrids substrate exhibits superior self-cleaning ability due to its photocatalytic degradation ability which can be applied repeatedly to the detection of pollutants. The advanced composite substrate simultaneously achieved ultra-low mass loading of Au NPs, outstanding detection performance, good reproducibility, high stability and self-cleaning ability. The development strategy of low load noble metal coupled high performance semiconductor β-Bi2O3 to obtain nano-hybrid materials provides a method to balance SERS sensitivity, cost effectiveness and operational stability, and can be synthesized in large quantities, which is a key step towards commercialization and has good reliability prospects.

Acetylene black doped zinc oxide (AB-ZnO) nanorods activated peroxydisulfate for degradation of dyeing wastewater

Zinc oxide (ZnO) nanorods and acetylene black (AB) doped ZnO (AB-ZnO) nanorods were fabricated by the hydrothermal method, and characterized by various methods (XRD, EDS, SEM, BET, FT-IR, Zeta potential). The photo-catalytic degradation ability of AB-ZnO/PDS/vis system on simulated dyeing wastewater was studied with methyl orange (MO) as the target pollutant. The effects of AB doping ratio, AB-ZnO dosage, PDS concentration, initial pH, and temperature on MO degradation were comprehensively investigated. The AB-ZnO/PDS/vis system has a wide range of pH applications from 3 to 11. The prepared material of AB-ZnO had excellent stability that the degradation efficiency on MO remained above 90 % after 4 cycles. The theoretical optimal removal rate of MO was 98.59 % when AB-ZnO dosage was 1.0 g/L, PDS concentration was 2.0 mmol/L, initial pH was 5, and temperature was 50 °C. Furthermore, degradation kinetic model, the orthogonal experiment and the degradation mechanisms were elaborated. By using methanol and tert-butanol as free radical inhibitors, it was confirmed that SO4·- and ·OH were the main active free radicals in AB-ZnO/PDS/vis system.

The Study on the Novel Complex Structure and Photocatalytic Degradation Ability of Manganese

The vigorous development of the dye industry has led to increasingly serious harm to the water environment. Currently, dye wastewater has become one of the most difficult industrial wastewater to degrade. Therefore, how to treat dye wastewater in a green and economical manner is receiving increasing attention. Photocatalytic technology has attracted much attention in the treatment of dye wastewater due to its advantages such as fast speed, no selectivity, and complete degradation. However, the current application of traditional photocatalytic materials is greatly limited due to the high recombination rate of photo generated charge carriers and the difficulty in separating and recovering powder catalysts. Therefore, it is of great significance to study the preparation and application of visible light response catalysts with high catalytic activity. The structure of the complex was characterized by X-ray single crystal diffractometer, and the manganese complex was determined by UV and IR spectroscopy, which was then used for the photocatalytic degradation of methyl orange solution.

Effective approach to improve photocatalytic dye degradation ability of ZnO based nanopowder: simultaneous cationic and anionic doping, and enzyme coupling

Effective approach to improve photocatalytic dye degradation ability of ZnO based nanopowder: simultaneous cationic and anionic doping, and enzyme coupling

Bifunctional S-scheme CdSSe/Bi2WO6 heterojunction catalysts exhibit generalized boosting performance in photocatalytic degradation of tetracycline hydrochloride, photoelectrochemical and electrocatalytic hydrogen production

In this work, by a simple method of hydrothermal synthesis, the CdSSe/Bi2WO6 S-scheme heterojunction catalyst is successfully obtained and the results are verified by XPS, EPR, band structure, etc. The S-scheme heterojunction can maintain the strong redox potential energy position of both catalysts, and adjust the electron transfer path to improve the electron-hole separation efficiency, and thus improve the charge transfer efficiency. CdSSe has a high conduction band (−1.13 eV) and a narrow bandgap width (1.59 eV), exhibiting good light absorption characteristics and reduction ability; the valence band position of Bi2WO6 is much low (2.58 eV), indicating good oxidation activity. This heterojunction has excellent oxidation and reduction capabilities and exhibits multifunctional catalysts. Its photocatalytic degradation ability of tetracycline hydrochloride is 2.2 times that of the original CdSSe, while its photoelectrochemical activity is 11 times that of CdSSe, reaching a photocurrent density of − 2.081 mA/cm2 at 0 V (vs. RHE). The electrocatalytic activity of its hydrogen evolution has also been enhanced. This study developed a design strategy for a novel bifunctional S-scheme heterojunction catalyst.

Fabrication of multifunctional g-C3N4-modified Au/Ag NRs arrays for ultrasensitive and recyclable SERS detection of bisphenol A residues.

Monolayer g-C3N4-modified Au/Ag nanorods (g-C3N4/Au/Ag NRs) array is fabricated as a dual-function platform with high surface-enhanced Raman scattering (SERS) response and excellent photocatalytic degradation ability for bisphenol A (BPA) residues. FDTD simulation results of Au/Ag NRs proves that the electromagnetic field intensity is significantly enhanced at the gap of Ag NRs and Au NPs and the protrusion of Au NPs, which endows the arrays with excellent SERS activity. The arrays exhibit high sensitivity for rhodamine 6G (R6G) (LOD = 1.1 × 10-11 mol/L) and high SERS enhancement (EF = 9.2 × 107). In addition, the g-C3N4/Au/Ag NRs could degrade ˃90% of BPA adsorbed on the substrate surface within 140 min under visible light irradiation, and maintains its SERS activity after repeated use for 4 times. The dual-function platform with high SERS response and excellent recycling capability is proved to be reliable and is very promising for monitoring of BPA residues in food.

Simultaneous preparation of ZnO/rGO composites through Zn(OH)2 decomposition and graphite oxide reduction and their photocatalytic properties.

ZnO/reduced graphite oxide (rGO) composites were simultaneously prepared by the thermal reduction of graphite oxide (GO) and the decomposition of Zn(OH)2. The samples were characterized using X-ray diffraction, scanning electron microscopy, transmission electron microscopy, photoluminescence, and DRS. Results indicate that Zn(OH)2 was heated and decomposed into ZnO at a low temperature (200 ℃), while GO was reduced to graphene. The synthesized ZnO particles were small and loaded on graphene layers. The ZnO/rGO photocatalysts exhibited excellent photocatalytic activity against methylene blue (MB) under simulated sunlight irradiation. The ZnO/50% rGO photocatalyst showed the best MB photodegradation rate of up to 99.7% within 3min. Synchronous reaction provided an efficient, simple, and fast preparation method for ZnO/rGO composites, with an excellent solar photocatalytic degradation ability.

PVDF Nanofiber Modified with ZnO Nanowires/Polydopamine for the Treatment of Sewage Containing Heavy Metals, Organic Dyes, and Bacteria.

In various countries worldwide, the issue of wastewater contamination poses a significant threat due to its intricate composition of heavy metals, organic dyes, and microorganisms, thereby complicating the purification process. Consequently, researchers have expressed considerable interest in materials capable of eliminating organic, heavy metal, and microbial pollutants. This study focuses on the fabrication of a water purification membrane (PDA/ZnO-NWs/PVDF) with a hierarchical structure and the ability to remove multiple pollutants. The membrane was created by modifying poly(vinylidene fluoride) (PVDF) nanofiber with zinc oxide nanowires (ZnO-NWs) and reinforcing it with polydopamine (PDA). The experimental results demonstrate that the PDA/ZnO-NWs/PVDF membrane exhibits a range of functionalities, including long-lasting superhydrophilicity, Cu(II) adsorption, photocatalytic degradation, and antibacterial ability. The manipulation of the DA synthesis procedure allows for the adjustment of the wettability, adsorption, and photocatalytic and antibacterial activities of the PDA/ZnO-NWs/PVDF composite. According to the Langmuir isotherm, the maximum Cu(II) adsorption capacity of the PDA/ZnO-NWs/PVDF membrane is determined to be 65.75 mg/g, which is significantly higher (27.26 mg/g) than that of the ZnO-NWs/PVDF membrane (38.49 mg/g). The PDA/ZnO-NWs/PVDF composite exhibited a notable degradation capacity toward rhodamine B under natural sunlight, reaching a maximum of 5.97 mg/g. Additionally, the degradation rate achieved during daylight hours was as high as 90.42%. Furthermore, the antibacterial efficacy of the PDA/ZnO-NWs/PVDF composite against both Gram-positive and Gram-negative bacteria approached 100%. This work presents a promising approach for the treatment of wastewater containing various coexisting contaminants.

Efficient photocatalytic production of H2O2 and photodegradation of tetracycline by CdS/square tubular g-C3N4 S-scheme heterojunction photocatalyst

Photocatalytic technology is an effective method for clean energy production and wastewater treatment. In this work, a square tubular g-C3N4 (MCN) is first synthesized by the aid of thermal polymerization of melamine in mixed KCl/LiCl molten salt and then loaded with CdS nanoparticles via a solvothermal method to obtain the final composite (MCN@CdS). This complex exhibits dual catalytic characteristics: photocatalytic oxygen reduction to produce hydrogen peroxide and photocatalytic degradation ability of antibiotics. The specific surface area (SSA) of MCN was enhanced by calcination with the help of molten salt, and the introduction of CdS expanded the absorption edge of MCN@CdS. In addition, electrochemical impedance and photocurrent spectroscopy confirmed that separation and migratory efficiency of photoproduced charge carriers could be promoted by the combination of MCN and CdS. As a result, the yield of hydrogen peroxide photocatalyzed by MCN@CdS is up to 0.95 mmol· L−1 in 80 min under visible light, which is 1.2 and 1.9 times larger than that of pure MCN and CdS. More importantly, the removal rate of tetracycline photocatalyzed by MCN@CdS, within 30 min with the participation of O2, achieved up to 99.5 %, 4 times faster than that in O2-free environment.

Superoleophobic TiO2@SSM membranes with antifouling and photocatalytic ability for efficient microbubbles flotation emulsion separation and organic pollutants degradation

In this paper, a stainless steel mesh coated with titanium dioxide (TiO2@SSM) membrane was developed for the separation of stable oil-water emulsions and the degradation of soluble pollutants. The TiO2@SSM membrane showed excellent underwater anti-oil adhesion performance and efficient emulsion separation under gravity (flux of 207.7 L m−2 h−1 and efficiency of 99.58 % for toluene-water emulsion). The emulsion could also be pre-broken by microbubble flotation to enhance the separation performance of the TiO2@SSM membrane (microbubble flotation followed by separation has a flux of 369.3 L m−2 h−1, and efficiency of 99.71 %). And the synergistic operation of separation and microbubble flotation can increase the flux to 451.6 L m−2 h−1. The membrane showed outstanding stability and could be recycled for more than 20 times without significant deterioration, and demonstrated chemical stability for corrosion resistance test (pH 0–14). In addition, the membrane, which is easily modified with silver nanoparticles, achieves improved photocatalytic degradation properties (efficiency from 58.8 % to 88.7 %) and microbubble flotation effect (flux of 613.4 L m−2 h−1). This work provides a rational strategy for the preparation and optimization of inorganic functional membranes for effective emulsion separation and dye degradation, and demonstrates promising applications of the separation and purification in oil-containing sewage and wastewater remediation.

In2S3 incorporated into CO32−@Ni/Fe/Zn trimetallic LDH as a bi-functional novel nanomaterial for enzymatic urea sensing and removal of sulfur-containing pharmaceutical from aqueous streams

The Ni/Fe/Zn trimetallic LDH intercalated with carbonate ions grown over In2S3 nanoparticles to form a novel In2S3/LDH nanocomposite fabricated with the combined efforts of the solvothermal and in-situ precipitation processes, as well as its enzymatic sensing and visible light-induced degradation ability, were thoroughly investigated in this study. The urease-immobilized In2S3/LDH/ITO electrode showed high-performance electrochemical sensing over a wide range of 1–240 µM with a lower limit of detection (LOD) of 0.246 µM and enhanced sensitivity of 2.29 × 10−7 A μM−1 cm−2 in phosphate buffer solution (50 mM, pH 7.5, 0.9 % NaCl) at a scan rate of 50 mV s−1. The fabricated electrode was reusable for up to 15 scans and demonstrated very high selectivity towards urea, as it showed an insignificant change in current, even in the introduction of various interferences. Furthermore, the synthesized In2S3/LDH nanocomposite demonstrated enhanced photocatalytic ability for degradation of 15 ppm of emerging sulfur-containing pollutant pantoprazole with an impressive efficiency of 98.25 ± 1.51 % in 35 min of visible light irradiation, with a high rate constant of 0.1 min−1. The H2O2-assisted AOP process showed improved COD removal of up to 87.31 ± 1.43 %, with high stability and reusability up to 7 consecutive cycles. Moreover, the as-prepared In2S3/LDH nanocomposite also showed significant degradation of other emerging pollutants with a more than 70 % degradation efficiency. As a result, this composite is a potential electrocatalyst for urea sensors in practical analysis, and it also has outstanding photodegradation of pantoprazole under visible light irradiation.

Flower-like spherical ZnCdS/Bi2WO6/ZnAl-LDH with dual type II heterostructure as a photocatalyst for efficient photocatalytic degradation and hydrogen production

One of the effective strategies for improving the photocatalytic activity of composite materials is to construct a heterostructure using layered double hydroxide (LDH) as the main photocatalytic material in order to accelerate photogenerated charge transfer. We report herein the preparation of a novel flower-like spherical photocatalytic composite, ZnCdS/Bi2WO6/ZnAl-LDH, with a dual type II heterostructure, by a hydrothermal method. ZnAl-LDH in the composite has the characteristic structure of a good hydrotalcite-like compound, and ZnCdS and Bi2WO6 are loaded on its surface to form flower-like spherical particles of uniform size. Compared with ZnAl-LDH, a ZnCdS/Bi2WO6/ZnAl-LDH composite has a significantly broader light absorption range and a more uniform pore size distribution. Electrochemical impedance, transient photocurrent, and photoluminescence results for ZnCdS/Bi2WO6/ZnAl-LDH composites have shown that the composition with 20% ZnCdS displayed the highest photocurrent density, the lowest electron-transfer resistance, and the lowest electron–hole recombination efficiency. Multi-mode photocatalytic degradation experiments showed all ZnCdS/Bi2WO6/ZnAl-LDH composites to exhibit good photocatalytic degradation ability. Meanwhile, ZnCdS/Bi2WO6/ZnAl-LDH showed enhanced hydrogen production of 79.20 μmol g−1 h−1, more than eight times that for ZnAl-LDH, and its photocatalytic activity remained stable after three experimental cycles. Through trapping experiments, the active species involved in the photocatalytic reaction has been identified, and the presence of a dual type II heterostructure in the ZnCdS/Bi2WO6/ZnAl-LDH composite is postulated. Rapid separation and migration of photogenerated charge carriers in the composite is achieved due to the close association of ZnCdS, Bi2WO6, and ZnAl-LDH.

Adsorption-photocatalytic degradation abilities of γ-irradiated chitosan-ZnO-AgNP composite for organic dye removal and antibacterial activity.

We synthesized a γ-irradiated chitosan-ZnO-AgNPs (ICZA) composite by using a simple hydrogels method. We evaluated its adsorption/photocatalytic degradation abilities for the removal of an organic dye and its antibacterial activity. The XRD, SEM, TEM, EDS, and FTIR techniques were used to characterize the obtained samples. Based on the adsorption and degradation of methylene blue (MB) in the dark and under UV light irradiation, the adsorption and the photocatalytic activity of the as-obtained samples were evaluated. The optimum conditions for synthesizing the composite were as follows: contact time of 210 min, a dosage of 2 g/L, MB concentration of 40 mg/L, and a solution pH of 8.0. The ICZA had a high adsorption capacity, which was suitable for removing MB from the aqueous solutions; it showed a maximum adsorption capacity (qm) of 92.59 mg/g. The fit of the adsorption isotherms with the Langmuir model was satisfactory. The photocatalytic degradation ability of the composite was also better than that of other catalysts in the presence of UV light, with an apparent rate constant (kapp) of 3.08 × 10-2. The synthesized ICZA also showed good antibacterial activity against Staphylococcus aureus, with a minimum inhibitory concentration (MIC) and a minimum bactericidal concentration (MBC) of 12.5g/mL and 50g/mL under light-incubation and dark-incubation conditions. Finally, we discussed the hypothesized mechanism of the adsorption/photocatalytic activity and antibacterial activity of the ICZA composite in this study.

Rare earth ions (La3+, Nd3+) substituted cobalt–strontium spinel ferrites for photocatalytic degradation of textile dyes

Abstract In the industrial sector, productive and effective treatment of toxic dye-based color pollutants is a key issue. Lanthanum and neodymium substituted cobalt–strontium (Co–Sr) spinel ferrite (Co0.5Sr0.5RExFe2-xO4, x = 0.00 and 0.06) catalysts were synthesized and used to degrade Congo red and rhodamine B dyes from an aqueous solution mixture in this study. For this specific purpose, RE3+ ions substituted Co–Sr spinel ferrite nanoparticles with photocatalytic degradation ability were prepared through sol–gel method. The degradation of CR and RhB in recently synthesized nanoferrites was also examined. SEM and XRD were used to characterize the prepared samples. The optical band gap values of synthesized spinel ferrites were examined with the help of Tauc plots by using UV-visible absorption. It was determined that the energy bandgap ranged from 2.91 to 2.52 eV. For Co0.5Sr0.5Fe2O4, Co0.5Sr0.5La0.06Fe1.94O4, and Co0.5Sr0.5Nd0.06Fe1.94O4 nanoferrites, the rates of CR and RhB dye degradation were 73–90% and 45–85%, respectively, at pH 5–7. The kinetics models successfully described the degradation reaction as pseudo-first-order kinetics. It was, therefore, concluded that the prepared samples can be used as effective photocatalysts in order to eliminate hazardous pollutants present in wastewater.

MOF-derived La/ZnO–TiO2 composite with enhanced photocatalytic ability for degradation of tetracycline

Developing effective and stable photocatalysts for organic pollutants degradation are still a big challenge in practical water treatment now. In this work, La doped ZnO–TiO2 composite (La/ZnO–TiO2) were successfully fabricated by using PVP modified ZIF-8/TiO2 as template via the absorption and pyrolysis routes. All as-fabricated materials were analyzed by XRD, SEM, TEM, BET, XPS, UV–vis absorption spectra and ESR spectra. PVP modified ZIF-8/TiO2 was fully transferred into ZnO–TiO2 after being pyrolyzed at high temperature under air atmosphere. The doping of La can make ZnO–TiO2 exhibiting red-shifted, which is attributed to the capture of photo-generated electrons by La, leading to the effective separation between photo-generated electrons and holes. Furthermore, the photocatalytic performance of all as-fabricated materials were explored by degradation of tetracycline (TC) solution under UV light irradiation. La/ZnO–TiO2 exhibits excellent stability. And the photocatalytic degradation rate of La/ZnO–TiO2 is 99.2%, which is even higher than ZnO (87.4%), ZnO–TiO2 (87.4%), P25 (TiO2) (92.7%). More than that, the effect of catalyst's dose, effect of TC concentration and effect of pH for TC degradation have been well explored. The excellent photocatalytic performance of La/ZnO–TiO2 makes it possible to be applied for degradation of organic pollutants in practice.

Enhancing the piezo-photocatalytic tetracycline degradation activity of BiOBr by the decoration of AuPt alloy nanoparaticles: Degradation pathways and mechanism investigation

AuPt alloy nanoparaticles were successfully decorated on the BiOBr surface to form AuPt/BiOBr piezo-photocatalysts via a photoreduction route. The removal of organic dyes (acid orange 10 (AO10) and rhodamine B (RhB)) were selected to estimate the photocatalytic activity of samples under simulated sunlight irradiation, which reveals that the AuPt/BiOBr composite manifests remarkably enhanced photocatalytic degradation ability compared with Au/BiOBr, Pt/BiOBr and bare BiOBr. Notably, the piezo-photocatalytic removal activity of AuPt/BiOBr towards the degradation of tetracycline (TC) was evaluated under the simulated sunlight and ultrasound irradiation. It is found that the piezo-photocatalytic removal performance of AuPt/BiOBr is obviously super to its individual piezo- and photocatalytic results, and its piezo-photocatalytic efficiency of TC increased by ∼ 33.6% and ∼ 53.3% in comparison to corresponding photocatalytic and piezocatalytic degradation efficiency. The piezo-photocatalytic degradation pathway of TC was systematacially discussed and proposed. The built-in electric field caused by the piezoelectric effect of AuPt/BiOBr sample significantly accelerate the bulk migration and separation of induced charges. On the other hand, the surface plasmonic resonance (SPR) effect of AuPt alloy nanoparaticles provided more hot electrons for piezo-photocatalytic reaction, meanwhile the AuPt alloy nanoparticles also promote the surface migration of induced charges on the AuPt/BiOBr sample.

Ag nanoparticle-modified P-doped tubular g-C3N4 for enhanced degradation of organic pollutants

Ag-doped ionic liquids (ILs) modified tubular g-C3N4 was prepared by hydrothermal, thermal polymerization and photoreduction method (Ag/PILCN). The ILs modification of g-C3N4 greatly increases its specific surface area and introduces P elements, which not only provides good conditions for the attachment of Ag nanoparticles at a later stage, but also increases the catalytic reaction sites and improves the final photocatalytic performance. Compared with pure g-C3N4, the synergistic effect of ILs surface modification and Ag doping in Ag/PILCN greatly enhanced the photocatalytic degradation ability of Ag/PILCN. The internal degradation efficiency of tetracycline reached 96.4%, and the catalytic performance did not decrease significantly after four cycles.

Integration of antibacterial and photocatalysis onto polyethersulfone membrane for fouling mitigation and contaminant degradation

Biofouling is a significant constraint in the development of membrane filtration technology. In this study, Ag nanoparticles (AgNPs) were synthesized homogeneously in situ on the polyethersulfone (PES) membrane surface, and titanium dioxide (TiO2) photocatalytic agent was subsequently coated through the functional polydopamine intermediate layer. The Ag-TiO2-PDA/PES membrane presented enhanced hydrophilicity, attractive antibacterial ability, and photocatalytic performance. The AgNPs modification achieved 96% bacterial inactivation by using the E.coli DH5α as the model microorganism, and TiO2 provided a photocatalytic degradation ability to the membrane. The improved flux recovery of the Ag-TiO2-PDA/PES membrane, which was approximately 95% in the third cyclical filtration, revealed the efficient antifouling ability through AgNPs and TiO2 modification. The Ag-TiO2-PDA/PES membrane inhibited biofouling in dynamic filtration by AgNPs and degraded the irreversible fouling by TiO2 during the cleaning procedure. The combined modification of the PES membrane by AgNPs and TiO2 exhibited a synergistic effect on the improvement of antifouling properties. This study provides a multifunctional membrane design strategy by combining antibacterial and photocatalysis to improve membrane fouling resistance.