Dioxide Composites Research Articles

Optical and Structural Characterization of Polyaniline/Titanium Dioxide Nano Composites

Abstract: Polyaniline/ titanium dioxide composite (PANI/TiO2) was synthesized by in-situ chemical polymerization in an ice bath medium for polyaniline with different percentages of TiO2 nanoparticles (3, 6, and 9) wt. %. UV-Vis spectrophotometer, Fourier Transforms Infrared (FTIR) spectrometer, X-ray diffraction (XRD), and Scanning Electron Microscopy (SEM) were used to characterize the materials. The XRD patterns showed polycrystalline structure for PURE PANI and PANI/TiO2 composite of different TiO2 ratios. The FT-IR investigated the presence of polyaniline. The analysis of UV-Vis spectra revealed that the energy gap for PANI/TiO2 decreased with increasing the ratios of TiO2 nanoparticles. Keywords: Conducting polymer, Polyaniline (PANI), Titanium dioxide (TiO2), Structure characterization, Optical properties, PANI composite.

Fast response humidity sensor based on chitosan/graphene oxide/tin dioxide composite

In this paper, Chitosan(CS)/graphene oxide(GO)/SnO2 composite is proposed as the sensing material of an impedance-type humidity sensor. The composite was synthesized via a facile solution mixing method. And it was formed by adding CS and SnO2 to GO aqueous solution. Scanning electron microscopy (SEM), X-ray diffraction (XRD) and Fourier transform infrared spectrometer (FT-IR) were executed to characterize the structure and morphology of the composite. At room temperature, the CS/GO/SnO2 composite shows more favorable humidity-sensing properties compared with the CS, CS/GO, and CS/SnO2 material. The resulted sensor exhibits high response (72683%), high sensitivity (402.5 kΩ/%RH), rapid response and recovery time (8 s/8 s). Moreover, small humidity hysteresis value (<7%) under maximum impedance difference, good repeatability and long-term stability are demonstrated. Therefore, the CS/GO/SnO2 composite is a promising candidate for humidity sensing.

The comparative study on inhibitory effect of natural organic matters on the TiO2 and activated carbon/TiO2 composites for the removal of 17α-ethinylestradiol

To reduce or eliminate the inhibition effect of natural organic matters (NOMs) in water on TiO2 photocatalysis for removal of emerging contaminants, four activated carbon/titanium dioxide (AC/TiO2) composites with different pore structure were prepared by hydrothermal method. The results showed that anatase TiO2 particles were uniformly distributed in the pores or onto the surface of activated carbons. The total removal rate of 6 mg L−1 17α-ethinylestradiol (EE2) on the four AC/TiO2 composites reached above 90%, 30% higher than that of EE2 on TiO2. The degradation rate constants of EE2 on four kinds of AC/TiO2 were much higher than that on TiO2. Further study indicated that the adsorption removal ratio of EE2 on the composites was slightly reduced mainly because competitive adsorption between hydrophilic NOMs (HA and FA) and EE2 molecules when HA and FA coexisted with EE2 in water. But importantly, the obvious inhibitory effect of FA for TiO2 photocatalysis was eliminated on four composites because the introduction of AC with excellent adsorption capacity can preferentially transfer hydrophobic EE2 molecules onto adsorption sites of TiO2/AC composites.

Efficient Inhibition of Aspergillus flavus to Reduce Aflatoxin Contamination on Peanuts over Ag-Loaded Titanium Dioxide.

Peanuts are susceptible to aflatoxins produced by Aspergillus flavus. Exploring green, efficient, and economical ways to inhibit Aspergillus flavus is conducive to controlling aflatoxin contamination from the source. In this study, Ag-loaded titanium dioxide composites showed more than 90% inhibition rate against Aspergillus flavus under visible light irradiation for 15 min. More importantly, this method could also reduce the contaminated level of Aspergillus flavus to prevent aflatoxins production in peanuts, and the concentrations of aflatoxin B1, B2, and G2 were decreased by 96.02 ± 0.19%, 92.50 ± 0.45%, and 89.81 ± 0.52%, respectively. It was found that there are no obvious effects on peanut quality by evaluating the changes in acid value, peroxide value, and the content of fat, protein, polyphenols, and resveratrol after inhibition treatment. The inhibition mechanism was that these reactive species (•O2-, •OH-, h+, and e-) generated from photoreaction destroyed cell structures, then led to the reduced viability of Aspergillus flavus spores. This study provides useful information for constructing a green and efficient inhibition method for Aspergillus flavus on peanuts to control aflatoxin contamination, which is potentially applied in the field of food and agri-food preservation.

Evaluation of biogas production and pollutant removal efficiency of two-phase anaerobic digestion treating slaughterhouse effluent

Treatment of slaughterhouse and other agro-processing industry effluent has become important due to continuous global population growth and meat demand, particularly in developing countries, for sustainable biowaste management as well as value additions such as biofuel. Therefore, the objective of the study was to evaluate the performance of two-phase anaerobic digestion of slaughterhouse wastewater in terms of biogas production, methane yield, and removal efficiencies of organic matter, total nitrogen, and total phosphorus. Two consecutively connected 40 L galvanized metal anaerobic batch bioreactors were used to conduct the experiment. The total phosphorus removal efficiencies of hydrolytic-acidogenic reactor and methanogenic reactor were 13.34% and 16.58%, respectively. Total chemical oxygen demand, soluble chemical oxygen demand, biological oxygen demand, total dissolved solids, total solids, total suspended solids, volatile solids, and turbidity had overall removal efficiencies of 82.87, 88.53, 93.32, 75.35, 95.55, 98.95, 97.42 and 98.06%, respectively. Biogas production of 189.45 mL/day with methane and carbon dioxide compositions of 67.69% and 29.9%, respectively, was also achieved. It was concluded that the two-phase anaerobic digestion of slaughterhouse wastewater shows substantial organic matter removal efficiencies and biogas production.

Effect of amorphous ordered mesoporous carrier on adsorption and desorption of Hg0 over CeOx-amTiO2

Improper disposal of deactivated mercury (Hg) adsorbents will cause secondary contamination which is still hazardous to human beings. Wet desorption is a green and environmentally friendly method, but there is a lack of sufficient study. In this work, a cerium oxide loaded ordered mesoporous amorphous titanium dioxide (CeOx-amTiO2) composite is obtained based on the evaporation-induced self-assembly (EISA) process. It possesses a high specific surface area (∼198 m2/g), uniform pore diameters (∼14.7 nm), and large pore volume (∼0.49 cm3/g). The CeOx-amTiO2 demonstrates high adsorption capacity in various atmospheres (63.3 % in pure N2, 95.0 % in N2 + 400 ppm H2S), and achieves a desorption efficiency of 93.2 % in 0.2 mol/L sodium thiosulfate (Na2S2O3) solution. The large specific surface area and ordered mesostructure significantly facilitate the mass transfer process, reasonably explaining the strong adsorption capacity and fast desorption kinetics. X-ray photoelectron spectroscopy (XPS) characterization and thermodynamic calculations reveal that the reduction of Ce3+ plays a key role in the desorption of Hg. In addition, the amorphous carrier structure reduces the binding strength between the adsorption product and the adsorbent, further accelerating the desorption process. This study provides a pathway for the efficient desorption of Hg0 removal adsorbents.

Preparation and tribological properties of multi-layer graphene/silicon dioxide composites-based solid lubricant coatings at elevated temperatures.

The solid lubricating coatings have an important role in hot metal forming. However, traditional lubricants cannot be applied to the harsh working conditions. In this investigation, the novel solid lubricant coatings including multi-layer graphene (MLG)/silicon dioxide (SiO2) composites and sodium metaphosphate phosphate were prepared. The high-temperature tribological properties of the solid lubricant coatings were investigated by friction and wear tester. The experimental results showed that SiO2 nanoparticles were evenly grafted by sol-gel method on the surface of MLG, forming MLG/SiO2 composites. MLG/SiO2 composites presented excellent thermal stability at 800°C. In the range of 400-800°C, the average coefficients of friction (COFs) were decreased from 0.3936 to 0.3663, and then increased from 0.3663 to 0.4226. Based on the analysis of wear scar, the lubrication mechanisms of the solid lubricating coatings were proposed. The low interlayer shear of MLG and the ball bearing of SiO2 nanoparticles are the main reason for the reduction of COFs. In addition, the tribo-chemical reaction film formed on the frictional interface could protect the contact surfaces from severe damage. The findings would be beneficial for developing novel lubricants for hot metal forming process.

The Substitution of Natural Zeolite with Agriculture Waste as Carbon Dioxide Adsorbent in Biogas Purification

Today, climate change is a global issue that must be resolved as soon as possible. Many governments take action to include renewable energy in energy mix policy. For Indonesia, biogas energy becomes one of many adopted alternative renewable energy sources. To increase the adoption of biogas in energy mix of Indonesia, biogas improvement should be enhanced. Biogas purification by adsorption is one of many methods of biogas improvement. To reduce the cost of biogas purification, we substitute natural zeolite with a local and waste-based adsorbent, the rice husk-based-biochar. In this study, we used five formulations with different ratios of zeolite and biochar: A1 (100% of natural zeolite), A2 (75%:25%), A3 (50%:50%), A4 (25%:75%), and A5 (100% of biochar) to decrease carbon dioxide composition and increase the calorific value of biogas. The substitution of 25% volume of zeolite with rice husk-based-biochar adsorbed 10.63% carbon dioxide. However, the substitution above 25% actually reduced the ability to adsorb carbon dioxide. The results showed that there is no correlation between carbon dioxide and the calorific value of biogas so further study needs to be developed to improve the biogas purification.

Study on properties of zinc ferrite, titanium dioxide and their composites

In this paper, the methods of sulfuric acid leaching and chemical coprecipitation were used to prepare products such as purified zinc ferrite, synthetic zinc ferrite, synthetic titanium dioxide and its complex with purified zinc ferrite. The morphology and microstructure of the above samples were characterized and analyzed by XRD and SEM. The results showed that the purified zinc ferrite contained a small amount of ZnO, SiO2, Al2O3 and PbSO4. Its particle size was the largest and the crystallinity was the best, but the surface was not smooth, the particle size distribution was not uniform and there was agglomeration phenomenon. The purchased zinc ferrite had high purity, the smallest particle size and the worst crystallinity. Its surface was smooth, particle size distribution was uniform, and it was loose and porous. The synthetic zinc ferrite had high purity, smooth surface, uniform particle size distribution and obvious agglomeration. The prepared titanium dioxide had no other impurities, good crystallinity, smooth surface and certain agglomeration phenomenon. For the zinc ferrite/titanium dioxide composite, adding a small amount of purified zinc ferrite would change the crystallinity of titanium dioxide, but it had little effect on the grain size of titanium dioxide. The surface was rough, the particle size distribution was not uniform, and there was agglomeration phenomenon.

Ni-Al layered double hydroxide-coupled layered mesoporous titanium dioxide (Ni-Al LDH/LM-TiO2) composites with integrated adsorption-photocatalysis performance.

Nickel aluminum layered double hydroxides (Ni-Al LDHs) and layered mesoporous titanium dioxide (LM-TiO2) were prepared via a simple precipitation process and novel precipitation-peptization method, respectively, and Ni-Al LDH-coupled LM-TiO2 (Ni-Al LDH/LM-TiO2) composites with dual adsorption and photodegradation properties were obtained via the hydrothermal approach. The adsorption and photocatalytic properties were investigated in detail with methyl orange as the target, and the coupling mechanism was systematically studied. The sample with the best performance was recovered after photocatalytic degradation, which was labeled as 11% Ni-Al LDH/LM TiO2(ST), and characterization and stability studies were carried out. The results showed that Ni-Al LDHs showed good adsorption for pollutants. Ni-Al LDH coupling enhanced the absorption of UV and visible light, and the transmission and separation of photogenerated carriers were also significantly promoted, which was conducive to improving the photocatalytic activity. After treatment in the dark for 30 min, the adsorption of methyl orange by 11% Ni-Al LDHs/LM-TiO2 reached 55.18%. Under illumination for 30 min, the decolorization rate of methyl orange solution reached 87.54%, and the composites also showed an excellent recycling performance and stability.

A light scattering camouflage membrane with similar solar spectrum reflectance to leaves based on a chlorophyll and titanium dioxide composite.

To counter the hyperspectral detection under the background of vegetation, a light scattering camouflage polyvinyl alcohol membrane containing lithium chloride, chlorophyll (Chl) and titanium dioxide (TD) particles was developed according to the bionic principle. Based on the reflectance and transmittance of the membrane, the optical constants of all components of the membrane were inverted via the ray tracing model and four flux Kubelka-Munk model. Using the determined optical constants, the reflectances of the membranes with different component contents were predicted through the model, and the effects of TD, Chl and water contents on the reflectance of the membrane were elucidated, respectively. Besides, a military specification of the USA in the region of 760 to 1200 nm and an Osmanthus fragrans leaf were used as a spectrum requirement and a simulation object of the camouflage membrane, respectively, to determine the appropriate contents of TD, Chl and water. It is found that when the volume fractions of TD, Chl and water are 0.7%, 5% and 50%, respectively, the 0.3 mm thick membrane can not only meet the military specification but also exhibit a reflection spectrum similar to that of the leaf with a similarity of 0.976.

Electrochemical and optical dual-mode detection of phenolic compounds using MnO2/GQD nanozyme

Phenolic compounds (PCs) have been widely employed in industrial activities and have also been found at threatening levels in natural environments, posing risks to human health and the environment. As a consequence, there is an increasing demand for the development of simple and sensitive detection methods of such pollutants. In this work, we report the use of manganese dioxide and graphene quantum dot (MnO2/GQD) composites as a dual-functional sensing platform for the electrochemical and colorimetric detection of catechol (CC) and dopamine (DA), two important PCs. Regarding the electrochemical detection, differential pulse voltammetry showed a linear relationship between current signal intensity and concentration of DA and CC over the linear ranges of 0.5–100 μM and 5–150 μM, with limits of detection of 0.05 µM and 0.09 µM for DA and CC, respectively. In addition, the composite was employed for the colorimetric detection of CC and DA through the oxidase mimic activity of the MnO2/GQD in the presence of 3,5,3,5-tetramethylbenzidine (TMB). Analysis in real samples showed that the MnO2/GQD composite can be used for the sensitive detection of CC and DA in river samples. The high surface area and improved electrochemical properties of the MnO2/GQD were demonstrated to be beneficial for dual sensing applications of phenolic compounds.

Experimental investigation of a new ammonium bicarbonate reactor induced with an electromagnetic heater

This work presents the experimental study conducted on a newly developed ammonium bicarbonate reactor for the purposes of carbon capturing and utilization. This reactor produces ammonium bicarbonate with the assistance of an industrial catalyst (such as steel) and an electromagnetic induction heater for enhancing the production of ammonium bicarbonate. The experimental setup is prepared to have three cases which are the baseline case, catalyst case, and induction heating case. These three cases are compared in terms of ammonium bicarbonate production by mass and the ratio of actual mass produced over their theoretical limits. The results of our present experiments show that the steel catalyst is proven to be an effective catalyst as it helps improve the production of ammonium bicarbonate by a factor of 1.56 when the inlet exhaust gases have 30% mol of carbon dioxide compared to the baseline case. In addition, the ammonium bicarbonate production improves by a factor of 2.56 when a steel catalyst and an induction heater are used together compared to the baseline case where the carbon dioxide composition entering the reactor is 80%mol. These results present the promising potential for implementing a cheap catalyst and an electromagnetic induction heater for the enhancement of carbon capture and utilization reactors.

Adsorption of organophosphorus malathion pesticide from aqueous solutions using nano-polypropylene-titanium dioxide composite: Equilibrium, kinetics and Optimization studies.

The purpose of this study was to investigate the applicability of the adsorption process of a persistent organophosphorus pesticide (malathion) from aqueous solutions by using titanium dioxide- polypropylene nanocomposite (Nano-PP/TiO2). The structure of Nano-PP/TiO2 was specified by field emission scanning electron microscopes (FE-SEM), fourier-transform infrared spectroscopy (FTIR), brunauer-emmett-teller (BET), and transmission electron microscope (TEM) technologies. Response surface methodology (RSM) was applied to optimize the adsorption of malathion onto Nano-PP/TiO2 and investigates the effects of various experimental parameters including contact time (5-60min), adsorbent dose (0.5-4g/l) and initial malathion concentration (5-20000mg/l). Extraction and analysis of malathion were performed by dispersive liquid-liquid microextraction (DLLME) coupled with a gas chromatography, coupled with flame ionization detector (GC/FID). The isotherms obtained for Nano-PP/TiO2 revealed that it was a mesoporous material with a total pore volume of 2.06 cm3/g, average pore diameters of 2.48nm and a surface area of 51.52 m2/g. The obtained results showed that the Langmuir type 2 was the best-fitted model for delegating the equilibrium data of isotherm studies with adsorption capacity of 7.43mg/g, and pseudo-second-order type 1 for kinetic model. The optimized conditions to achieve the maximum removal (96%) were at a malathion concentration of 7.13mg/L, contact time of 52min and adsorbent dose of 0.5g/L. Due to its efficient and appropriate function in adsorbing malathion from aqueous solutions, it was revealed that Nano-PP/TiO2 can be used as an effective adsorbent as well as in further studies.

Improvement in Injection Molding Quality Performance with Innovative Cyclone Mixers Used in Polypropylene with Spherical Silicon Dioxide Composites.

This research proposes an innovative design of a new cyclone mixer for the quality of polymer materials, and it presents a systematic optimization model of process parameters for plastic injection molding. Thermo gravimetric analysis (TGA) and differential scanning calorimetry (DSC) were used to determine the appropriate thermal properties of processing in order to select appropriate control factors and level values for a Taguchi orthogonal array. The injection molding machine was used to make sample test pieces for tensile strength, hardness and impact strength. Significant factors were found by the signal-to-noise (S/N) ratio with an analysis of variation (ANOVA), and the single-quality optimal parameter combination was obtained. The reproducibility of the experiment was evaluated, and various quality weights were evaluated by principal components analysis (PCA). The multi-quality optimal parameter combination was found, and the comprehensive scores were compared. Finally, the process capability indices were combined with a multi-process capability analysis chart (MPCAC) to compare the process yields of cyclone mixing and screw mixing. The mechanical properties of products were evaluated to verify the performance of cyclone mixing and to provide perfect information for the injection molding quality performance of cyclone mixing and screw mixing. It was concluded that the overall quality of the cyclone mixing products is 42.72, and the total quality of the screw mixing products is 41.85. The total number of defects for the cyclone mixing is 9659 ppm, and that of the screw mixing is 10688 ppm. It can be seen that, for the overall product quality performance, cyclone mixing can be applied in the plastic injection molding process instead of screw mixing.

Capacitive removal of Pb ions via electrosorption on novel willow biochar–manganese dioxide composites

ABSTRACT Biochar derived from lignocellulosic biomass has been used as a low-cost adsorbent in wastewater treatment applications. Due to its rich porous structure and good electrical conductivity, biochar can be used as a cost-effective electrode material for capacitive deionization of water. In this work, willow biochar was prepared through carbonization of shrub willow chips, activated with potassium hydroxide, and loaded with manganese dioxide (WBC-K-MnO2 nanocomposite). The prepared materials were used to electrochemically adsorb Pb2+ from aqueous solutions. Under the applied potential of 1.0 V, the WBC-K-MnO2 electrode exhibited a high Pb2+ specific electrosorption capacity (23.3 mg/g) as compared to raw willow biochar (4.0 mg/g) and activated willow biochar (9.2 mg/g). KOH activation followed by MnO2 loading on the surface of raw biochar enhanced its BET surface area (178.7 m2/g) and mesoporous volume ratio (42.1%). Moreover, the WBC-K-MnO2 nanocomposite exhibited the highest specific capacitance value of 234.3 F/g at a scan rate of 5 mV/s. The electrosorption isotherms and kinetic data were well explained by the Freundlich and pseudo-second order models, respectively. The WBC-K-MnO2 electrode demonstrated excellent reusability with a Pb2+ electrosorption efficiency of 76.3% after 15 cycles. Thus, the WBC-K-MnO2 nanocomposite can serve as a promising candidate for capacitive deionization of heavy metal contaminated water.

Core–shell Fe3O4–TiO2 nanoparticles via surface treatment for plasmid DNA purification

Magnetite (Fe3O4) and titanium dioxide (TiO2) composites or core–shell structures have been used in various applications owing to the advantages afforded by their combined characteristics. In this study, TiO2 coatings were obtained by an aqueous process under reflux conditions using titanium(IV) isopropoxide as a TiO2 precursor. Before surface coating with TiO2, the Fe3O4 surface was treated using reagents having hydroxyl, carboxyl group, and citrate bond to enhance the efficiency of TiO2 particle adsorption. The functional groups on the surface of Fe3O4 were expected to act as adsorption sites owing to electrostatic interaction with TiO2 particles. After the TiO2 coating process, the most efficient functional group for coating was identified by various analyses that confirmed the adsorption of TiO2 particles. The surface functional groups and TiO2 particles on Fe3O4 were observed by Fourier transform infrared spectroscopy. The crystal structure after coating was analyzed by X-ray diffraction analysis. Adsorbed TiO2 particles were observed by electron microscopy and elemental composition analysis. Additionally, the suitability of the Fe3O4–TiO2 particles for DNA purification was confirmed by agarose gel electrophoresis tests.

Development of carbonized wood/silicon dioxide composite tailored for single-density shoe sole manufacturing

Response Surface Methodology (RSM) and the Normal Boundary Intersection (NBI) method were utilized in this study for modeling and multi-objective optimization of carbonized wood/silicon dioxide composites. Operational variables such as particle size, carbonization temperature, filler content, curing temperature, curing pressure, and curing time were simultaneously adjusted to improve the tensile, hardness, density, and water absorption characteristics of the composite. RSM models were developed utilizing an experimental approach based on the Central Composite Design (CCD). The models showed outstanding correlation coefficient, with a threshold of 0.9959 and was therefore employed as the fitness function for the NBI algorithm's multi-objective optimization. A set of optimal compromise solutions was found at 25 µm particle size, 200 °C carbonization temperature, 51 phr filler content, 150 °C curing temperature, 3 Pa curing pressure and 10 min curing time; this formular results in 19.22 MPa tensile stress, 1.08 g/cm3 density, 97.15 hardness (shore A) and 7.18% water absorption. The optimum material formular was then deployed in single-density shoe sole manufacturing using a predesigned steel mould. Fourier-transform infrared spectroscopy (FTIR) and Scanning Electron Microscopy (SEM) were used to characterize the new material.

Developing Ag2O and Ag2O/TiO2 nanostructures as a new strategy for control late blight of potato caused by Phytophthorainfestans

The nanostructures of silver oxide and silver oxide-titanium dioxide composite were synthesized and tested for their potential to direct antifungal activity against P. infestans, under laboratory, greenhouse and field conditions. Furthermore, the ability of the synthesized nanoparticles to activate the expression of defensive genes was investigated. The effect of Ag2O and Ag2O/TiO2 nanostructures on the growth properties of potato plants was studied. The results showed that Ag2O and Ag2O/TiO2 significantly inhibited the radial growth of Phytophthora infestans relative to the untreated control under laboratory conditions. The results indicated that the most effective treatment in controlling this disease was azoxystrobin followed by Ag2O/TiO2 and Ag2O, recording 82.7, 81.4 and 80.7% efficacy, respectively under greenhouse conditions. Additionally, under field conditions, the most effective treatment in controlling the disease was recorded by azoxystrobin followed by Ag2O/TiO2 and Ag2O with 79.9, 67.7 and 64.1, respectively, compared to the non-treated control. Regulatory and defensive genes included in jasmonic acid (JA)/ethylene (ET) signaling pathways were expressed in potato plants treated with Ag2O and Ag2O/TiO2 composite at a level 2–3 times higher than the control. Potato treatments with Ag2O and Ag2O/TiO2 composite compared to azoxystrobin application led to significant improvement in potato growth and productivity. This is the first report of Ag2O and Ag2O/TiO2 nanoparticles used as new and ecofriendly fungicide alternatives against this pathogen.

Novel adsorption-photocatalysis integrated bismuth tungstate modified layered mesoporous titanium dioxide (Bi2WO6/LM-TiO2) composites

Using cetyltrimethylammonium bromide (CTAB) as the soft template and titanium sulfate as the titanium source, the layered mesoporous TiO2 (LM-TiO2) was prepared by the novel precipitation-peptization method, then bismuth tungstate was synthesized and coupled with layered mesoporous titanium dioxide by the hydrothermal process to obtain adsorption-photocatalysis integrated Bi2WO6/LM-TiO2 composites. The surface morphology, transmission morphology and elemental mapping, particle size, crystal phase composition, ultraviolet absorption band, fluorescence intensity, functional group structure, element composition and valence state of the samples were characterized using scanning electron microscopy (SEM), transmission electron microscope (TEM), laser particle size analyzer, X-ray diffraction (XRD), ultraviolet visible absorption spectrum (UV–Vis-Abs), Molecular fluorescence spectrophotometer (PL) and X-Ray photoelectron spectroscopy (XPS), respectively. Taking methyl orange as the target substance, the adsorption and photocatalytic performances of the samples were studied. The results indicate that Bi2WO6/LM-TiO2 composites have excellent adsorption and photocatalytic degradation performances. When irradiated with a 500 W metal halide lamp for 20 min, the removal rate of methyl orange by 8% Bi2WO6/LM-TiO2 reaches 93.60% which is greatly improved compared with simple LM-TiO2, and is twice as that of P25. By coupling LM-TiO2 with Bi2WO6, the composites show a spherical structure, and the crystallinity does not change significantly. Moreover, the light absorption band edge has a certain red shift and the photogenerated electron-hole recombination is restrained, thereby improving the photocatalytic performance.