Physical Mixing Method Research Articles

Green synthesis of MOF/CNT gels via in-situ physical mixing strategy toward quasi-solid-state Li-ion hybrid capacitor

Compositing metal-organic frameworks (MOFs) with carbon nanotubes (CNTs) can effectively improve their conductivity and structural instability to achieve excellent supercapacitor performance. However, the two main traditional composite strategies of ex-situ physical mixing and in-situ chemical growth still have some limitations, such as the heterogeneous dispersity and the destruction of CNTs, etc. In this work, we propose a green in-situ physical mixing method to construct advanced MIL-100-Fe/CNT architecture. An adding content of 10 % for CNTs results in the optimal composite structure within homogeneous dispersion and favorable interactions between MOF host and CNT guest, achieving a high specific capacitance of 431.6 F g−1 at the current density of 1 A g−1, which is much higher than of the pristine MOF (143.1 F g−1). An in-depth electrochemical study illustrates that the moderate addition of CNTs promotes the fast charge transfer dynamics of Li-ion in the composite electrode while the excessive CNTs will lead to localized aggregation and property degradation. A quasi-solid-state Li-ion hybrid capacitor device was assembled, displaying a high energy density of 20.2 W h kg−1 and a long cycle life of 89.4 % capacitance retention after 8000 cycles. The contribution has provided a new direction for constructing advanced MOF-based composite architectures for energy storage applications.

Chitosan Hydrogel Dressing Loaded with Adipose Mesenchymal Stem Cell-Derived Exosomes Promotes Skin Full-Thickness Wound Repair.

Cutaneous trauma repair is still a challenge in the clinic due to the scar formation and slow healing rate, especially for diabetic patients. Various drug-loading wound dressings have been explored to solve this problem. Mesenchymal stem cell (MSC)-derived exosomes have been considered as a potential cell-free drug because of their anti-inflammation function and tissue repair property that are comparable to that of MSCs. Herein, a composite wound dressing (Exo/Gel) consisting of the chitosan hydrogel and adipose MSC-derived exosome (ADMSC-Exo) was designed and fabricated by a physical mixing method to promote the skin full-thickness wound repair. The exosomes were slowly released from the Exo/Gel dressing with the degradation of the chitosan hydrogel. The Exo/Gel displayed enhanced cell migration and angiogenic properties in vitro. And the results in the rat skin wound model showed that the Exo/Gel could promote the regular collagen deposition, angiogenesis, and hair follicle mosaicism regeneration. These results proved that the hydrogel dressing with ADMSCs-derived exosomes can accelerate skin wound healing, which is a strategy for developing wound dressings.

Structural and magnetic properties of hexagonal ferrite composites with planar and perpendicular anisotropy

In the present work, composites of (x)SrFe12O19(SrM)/(1-x) Ba2Co2Fe12O22(Co2Y) [where x = 0.1, 0.2, 0.3, 0.4] were prepared by physical mixing method. The effect of exchange coupling between SrM and Co2Y phases on composites structural, morphological, and magnetic properties has been investigated. XRD patterns confirmed the co-existence of SrM and Co2Y phases with the presence of a secondary Co2Z phase. Smooth hysteresis loops without kink confirmed that SrM and Co2Y phases in composites are exchange-coupled and signify cooperative magnetic switching among M and Y phase spins. A linear increase in magnetization was observed with an increase in M-phase. On the other hand, a decrease in coercivity was observed due to strong intervening coupling between the phases. A single peak in the switching field distribution curve (SFD) of composites also confirm strong coupling between M and Y phases.

Solar Light Active Graphitic Carbon Nitride/Biochar Nanocomposite for RhB Dye Degradation

AbstractIn this work, nanocomposite graphitic carbon nitride/biochar is successfully prepared by physical mixing method to achieve efficient charge separation and photodegradation of RhB dye under sunlight. The biochar is synthesized by heating biomass in muffle furnace in an inert atmosphere. The graphitic carbon nitride is prepared using melamine as a precursor and heating it in a muffle furnace in air atmosphere. The structural characterizations FTIR and X‐ray diffraction are done to confirm the functional groups and crystallography of prepared samples. The photodegradation of RhB dye by nanocomposite is analyzed using a UV–visible spectrophotometer under solar irradiation. It is found that the RhB dye is completely reduced by the nanocomposite in less than 6 min in the presence of sunlight. The kinetic study confirms the photodegradation of RhB dye is first order reaction and rate constant is found to be 0.31 min−1.

In situ self-transformation strategy toward zinc selenide electrode for lithium-ion capacitors

Conversion/alloying mechanism anode materials, featuring its higher theoretical capacity, have been deemed to one of the most potential candidates in the context of lithium ion capacitors (LICs). Nevertheless, the Li+ diffusion sluggish kinetics and severe volume variations during repeatedly lithiation/delithiation process further impede their application. Herein, an in situ self-transformation strategy is proposed to unlock the cyclic stability of electrode material. Multiple characterization techniques are adopted to unfold the electrode storage mechanism, the evolution of crystal structure, as well as the kinetics after reconstruction. The hexagonal wurtzite (WZ) in rGO-coupled ZnSe would be transformed spontaneously to cubic zinc-blende (ZB) phases upon the first electrochemical cycling with Li+. Consequently, the WZ-ZnSe@rGO electrode delivers dramatically cycling stability (451 mAh g−1 after 220 cycles at 0.1 A g−1). Additionally, we also prepare cubic m-ZB-ZnSe@rGO through physical mixing method, exhibiting high Li-storage capacity (468 mAh g−1 at 0.1 A g−1). This work suggests that in situ self-transformation strategy is feasible for creating high-performance electrode materials.

Facile Grinding Method for Preparing Nano-Cu-Cr-Fe Composite Metal Oxides with Enhanced Catalytic Activity for Thermal Decomposition of Ammonium Perchlorate

ABSTRACT Ammonium perchlorate (AP) is a commonly used oxidant for solid propellants, and improving the thermal decomposition performance of AP has been the focus of research, as its thermal decomposition performance directly affects the performance of the propellant. Among a variety of catalysts, nanocomposite metal oxides have demonstrated a significant role in facilitating the thermal decomposition of AP. In this study, Cu-Cr-Fe ternary metal oxides with different molar ratios (5:2:8, 5:4:6, 5:6:4, 5:8:2) were prepared by a facile mechanical grinding method to investigate their catalytic effect on the thermal decomposition properties of AP. The structure and morphology of Cu-Cr-Fe ternary metal oxides were investigated using X-ray diffractometer (XRD), energy-dispersive X-ray spectroscopy (EDS), scanning electron microscopy (SEM) and transmission electron microscopy (TEM), and the catalytic effect of different ternary catalysts on the thermal decomposition performance of AP was also investigated using thermal weight (TG) and differential scanning calorimetry (DSC) techniques. The results show that Cu-Cr-Fe ternary nanocomposite metal oxides with a molar ratio of 5:2:8 prepared by mechanical grinding exhibit excellent catalytic effect on the thermal decomposition of AP, as well as nanometallic oxides (Cu-Cr-Fe = 5:2:8) prepared using the co-precipitation and physical mixing methods. Furthermore, the ternary Cu-Cr-Fe (molar ratio of 5:2:8) composite metal oxide prepared by mechanical grinding resulted in a significant decrease in the thermal decomposition temperature of AP, which decreased from 441.3°C to 352.5°C, the heat of decomposition increased from 941 J/g to 1680 J/g, and the Gibbs free energy of AP decreased from 199.8 kJ/mol to 173.2 kJ/mol. This demonstrates the good synergistic catalytic effect between CuO, Cr2O3 and Fe2O3 nanoparticles, which is expected to facilitate the application of ternary nanocomposite metal oxides in the field of solid propellants.

In situ XPS confirmed the efficient charge transfer of the CdS/GDY/ZnMoO4 heterojunction based on graphdiyne(CnH2n-2) for photocatalytic hydrogen production

Graphdiyne (GDY) is a new type of carbon material. Because of its excellent electrical conductivity and adjustable charge distribution, it has attracted wide attention in the field of photocatalysis. In this work, multilayer flake GDY was prepared by ball milling method and CdS/GDY/ZnMoO4 ternary composite catalyst was successfully prepared by physical mixing method. In-situ XPS verified the formation of CdS/GDY/ZnMoO4 heterojunction, which effectively inhibited electron-hole recombination, and also reflected that the new carbon material GDY had strong electron-donating ability. The experimental results show that the CdS/GDY/ZnMoO4 composite catalyst has strong redox activity. Under visible light irradiation, the hydrogen production of CdS/GDY/ZnMoO4 is 1238.61 μmol, which is 16.98 times that of pure CdS. This indicates that GDY can be effectively applied to the field of photocatalytic hydrogen production, providing new possibilities for its application.

A method to improve dye-uptakes of less soluble disperse dyes for polyester fibers in supercritical CO2 fluid: A theoretical and experimental study

Two organic small molecules were used as assist-dissolving agents to increase the solubility of some dyes in ScCO2. Theoretical calculations showed that nicotinamide was better than benzoic acid. AIM and IGMH methods confirmed the hydrogen bonding and π-π stacking interactions between the agents and dyes. The mixtures of agents and dyes were made by the physical grinding and mixing method, and their solubilities and melting points were tested. The results indicated that the agents reduced the intermolecular forces in the dye crystals, thus enhancing the dye solubility in ScCO2. The dyeing experiment also proved the improvement of dyeing performance by the agents. The dye uptake increased from 20%∼30% to 60%∼70%, and the color intensity of the fibers improved. The best operating parameters were a temperature of 130 ℃ and a pressure of 28 MPa. The hue and color fastness of the dyed products were similar to those dyed with pure dyes.

Chemiresistive detection of SO2 in SF6 decomposition products based on ZnO nanorod/MoS2 nanoflower heterojunctions: Experimental and first-principles investigations

Sulfur dioxide (SO2) is a typical gas in SF6 discharge decomposition components. The detection of SO2 can reflect the safe operation of SF6 gas insulation equipment. In this paper, the ZnO nanorod/MoS2 nanoflower (ZnO NR/MoS2 NF) heterojunction was prepared by hydrothermal and physical mixing methods for the ultra-sensitive detection of SO2. In the two test environments of the air and SF6, the response and recovery time of the ZnO NR/MoS2 NF heterojunction sensor to 30 ppm SO2 are 52 s/5 s (11 s/7 s), respectively, and the response value of the sensor are 46.12% (47.33%) at 250 °C. The sensor shows excellent selectivity, moisture resistance, and long-term stability. Furthermore, it has been demonstrated through first principles calculations that the ZnO/MoS2 heterogeneous composite exhibits superior adsorption performance for SO2 compared to ZnO and MoS2 alone. The sensor mechanism in the air is mainly described as the interaction between SO2 and oxygen adsorbed on the surface of the sensitive material. The sensing mechanism under SF6 background gas can be described as the competitive adsorption of SO2 molecules with lattice oxygen molecules on the surface of ZnO NR/MoS2 NF heterojunction, and the reaction of F2− adsorbed on the surface of ZnO/MoS2 heterojunction with SO2 molecules.

Enhanced visible-light photocatalytic activity of ZrO2/gCN composite by introducing nitrogen vacancies with H2 plasma treatment

The abuse of tetracycline antibiotics (TCs) has caused serious environmental pollution problems in recent years due to excessive use of biomedicine, healthcare, animal husbandry and other fields. How to effectively remove TCs contaminants from water has been one of research emphasis on environment protection. In this work, we have successfully prepared a composite photocatalyst (P16-ZrO2/gCN) by physical mixing method and H2 plasma treatment at room temperature. The ZrO2 nanoparticles and H2 plasma treatment have synergetic effects on photocatalytic performance of gCN for degradation of TCs, and the highest degradation rate is achieved with 16 mins plasma treatment. According to BET, XPS and EPR results, more mesopores and nitrogen vacancies (NVs) are introduced by H2 plasma treatment. Furthermore, In-situ TRPL spectra illustrate that ZrO2 nanoparticles and H2 plasma treatment facilitate charge transfer process of catalysts. Overall, this work firstly reports utilizing ZrO2 nanoparticles/H2 plasma treatment together to boost photocatalytic performance of gCN and provides a low-cost approach for preparation of other photocatalysts.

Preparation and Mercury Removal Performance of Mg-MOF-74 Composites

A metal–organic framework (MOF) material Mg-MOF-74 was prepared by a solvothermal method, and the influence of the solvent volume and mass–liquid ratio on the preparation process was investigated. Based on the iron-based modified biochar FeCeCu/BC obtained by the sol–gel method, functionalized modified MOF-based biochar composites were prepared by the physical mixing method, co-pyrolysis method, sol–gel method and in situ growth method. The mercury removal performance and structural characteristics of the samples were studied, and the adsorption mechanism and key action mechanism were studied by using the adsorption kinetic model. Increasing the solvent volume and the mass liquid ratio will make the crystallization and pore structure of Mg-MOF-74 worse and its mercury removal performance poor. For MOF-based FeCeCu/BC composites, the mercury removal performance of the composite samples prepared by the sol–gel method and co-pyrolysis method is the best, at 31% and 46% higher than that of modified biochar, respectively. Mg-MOF-74 plays a role in promoting pyrolysis and changing the pore structure in the composite. The mercury removal process of composite materials is the result of physical adsorption and chemical adsorption, external mass transfer and internal diffusion.

Optimization Strategy of Molecular Modified Graphene Films for High-Performance Aqueous Zinc-Ion Hybrid Supercapacitors

Molecular modified graphene films (M-GFs) have the advantages of simple preparation and high electrochemical activity, which has a promising future in the field of electrochemical energy storage. However, the influence of molecular doping technology is rarely studied for electrochemical performance of the M-GFs, hindering the development of high-performance M-GFs. Herein, we have demonstrated that a selective adsorption self-assembly strategy can prepare M-GFs with higher performance than physical mixing method. The prepared M-GF exhibits a three-dimensional porous structure with active organic molecules support, and its interlayer spacing is evenly widened. The resulting M-GFs as cathode material of aqueous Zinc-ion hybrid supercapacitors (AZISCs) exhibits a high specific capacitance of 228F g-1, and a good capacitance retention of 42% (@10 A g-1), which are 25% and 13% higher than those of the physical mixing method, respectively. Besides, the energy and power density of the devices can reach 82 Wh kg-1 and 20.3 kW kg-1, respectively. After 5000 cycles of charge and discharge testing, the capacitance retention rate of the device can still reach 94%. The impressive results indicate that the M-GFs by selective adsorption self-assembly strategy could be a potential high-performance electrode material for the AZISCs..

Observation of interfacial magnetic interaction in Eu-doped BiFeO3 and YMnO3 nanocomposites

The results of structural and magnetic properties of (1-x)Bi0.96Eu0.04FeO3-(x)YMnO3 (x = 0.0,0.25,0.50,0.75,1) nanocomposites, synthesized using physical mixing method are presented in this work. The Eu doped bismuth ferrite and yttrium manganite nanoparticles are synthesized separately and then physically mixed using hydrothermal method. The physical mixing of the parent materials helps to retain the properties of both the materials in the nanocomposites. XRD patterns show the presence of both phases (R3c and P63cm) in the nanocomposites, without any structural distortion or presence of other intermediate phases. Morphological analysis of the samples is done using FESEM and HRTEM techniques. The FESEM results show that the particles in the parent as well as nanocomposites are irregularly distributed with agglomeration of particles in Eu doped BiFeO3 and the nanocomposite (BY-50). The interplanar distances corresponding to crystal planes of both phases are calculated for BY-50 nanocomposite from the HRTEM results. Chemical state analysis of BY-50, using XPS confirms the formation of nanocomposite. Multiple valence states for Fe (Fe2+ and Fe3+) and Mn (Mn2+, Mn3+ and Mn4+) are formed as a result of charge compensation phenomenon. The dominant Fe3+ and Mn3+ plays an important role in the magnetic properties of nanocomposites. Magnetic studies on the parent as well as the nanocomposites are done using room-temperature VSM. The M−H loops show wasp-waisted nature with the presence of weak ferromagnetism along with anti-ferromagnetic or paramagnetic ordering. The constricted nature of loops has been confirmed using ΔH (loop-width) versus M (magnetization) loops. The addition of YMnO3 in the nanocomposites slightly increases the maximum magnetization from 0.149 emu/g for Eu doped BiFeO3 nanoparticles to 0.364 emu/g for BY-75 nanocomposites. The maximum magnetization in the nanocomposites increases because of the constructive alignment of the spins at the interface. The presence of interfacial magnetic interaction in the samples has been corroborated through room-temperature X-band ESR analysis.

Dry Reforming of Methane over Ni-Supported SBA-15 Prepared with Physical Mixing Method by Complexing with Citric Acid

Ni-supported SBA-15 catalysts were prepared by physical mixing of Ni(NO3)2·6H2O and SBA-15 (Ni/SBA-15-M) and in the presence of citric acid as the complexing agent (Ni/SBA-15-M-C). Moreover, an Ni-supported SBA-15 catalyst was also prepared by the conventional incipient impregnation method (Ni/SBA-15-I). All the catalysts were systematically evaluated for carbon dioxide reforming of methane (CDR) at CO2/CH4 = 1.0, gas hourly space velocity of 60,000 mL·g−1·h−1, and reaction temperature of 700 °C. The characterization results show that the Ni particle size of Ni/SBA-15-M-C is significantly smaller than that of Ni/SBA-15-M due to the coordination effect of citric acid and Ni2+. Consequently, the Ni/SBA-15-M-C exhibits superior anti-coking and anti-sintering during the CDR-operated period because of the higher Ni dispersion and stronger Ni–support interaction. Compared to the Ni/SBA-15-I, the physical mixing of nickel salt and mesoporous material for preparing of Ni-based catalyst is easy to operate, although the crystal size and catalytic performance of Ni/SBA-15-C are very similar to that of Ni/SBA-15-M-I. Thus, the efficient and easily controlled catalyst structure makes the physical mixing strategy very promising for preparing highly active and stable CDR catalysts.

Simple preparation of monolithic N-doped electrode for efficient EF remediation of petrochemical wastewater: Performance, degradation pathways, and mechanism of different N-doped positions

Developing metal-free N-doped electrode for efficient electro-Fenton (EF) application is significant for petrochemical wastewater treatment considering the serious water pollution problem that caused by petrochemical industry. Herein, a robust monolithic N-doped electrode was fabricated by simple physical mixing and heating methods using accessible raw materials, and applied in EF system for wastewater treatment. The prepared 3D NC-650 electrode was used as cathode, showing excellent catalytic activity and stability for degradation of typical p-nitrophenol (PNP) pollutant and remediation of petrochemical wastewater. During the EF process, the PNP was completely decomposed via the substitution, oxidation, and ring-opening reactions under the attack of ·OH. The degradation pathways of organics in real wastewater matrix were also revealed based on liquid chromatography-mass spectrometry and three-dimensional fluorescence analysis. According to the degradation experiments, microstructure analysis, and theoretical calculation (molecular electrostatic potential, bond length, and adsorption energy), the possible mechanism of different N-doped positions on the monolithic 3D NC-650 electrode was revealed, in which the graphitic N, edge pyridinic N, and edge pyrrolic N all contribute to enhance the EF activity by accelerating the O2 adsorption, facilitating the H2O2 formation by promotion of *–OOH bond breaking, and promoting the adsorption of organics on electrode surface, respectively. This work illustrates insights into the EF reaction mechanism with the monolithic N-doped electrode, and thus accelerates its application for actual wastewater remediation.

Formulation and Evaluation of Ornidazole Oral Re-Constitutable Suspension

Large numbers of drugs are available in the market in form of dry syrup, where reconstitution has to be done by patient. Ornidazole is an antibiotic used to treat some protozoan infections. It has also been investigated for use in Crohn's disease after bowel resection. In the present investigation the drug Ornidazole was selected for the design of oral reconstitutable suspension for improving its stability and palatability by using various techniques like physical mixing, solvent evaporation and co-grinding method with different suspending agents like Xanthan gum, SCMC, Guar gum and sodium alginate. The reconstitutable suspensions were evaluated for flow properties, particle size, pH, viscosity, sedimentation volume, redispersibility and drug release by in-vitro dissolution studies. Formulated OFS reconstitutable suspension has acceptable sedimentation properties. The drug excipients interactions and crystal morphology of optimized reconstitutable suspension were evaluated by Fourier transform infrared spectroscopy (FTIR), differential scanning Calorimetry (DSC), analysis. The results indicated that the release of the Ornidazole was rapid from all formulations than the pure drug. The drug release from the suspensions followed first order kinetics. From the results it is concluded that effective taste masking of Ornidazole was achieved using SCMC and successfully evaluated in reconstitutable suspension.

Aquathermolysis of heavy oil using a mixed nickel-oxide/iron-oxide catalyst: Effects induced by crystal phase of iron oxide

Nickel and iron compounds have garnered attention as catalysts for upgrading heavy oil via aquathermolysis. However, research on the performance of bimetallic oxide catalysts in aquathermolysis remains limited. To that end, NiO–Fe2O3 catalysts were prepared in this study using a simple physical mixing method and employed in heavy-oil aquathermolysis to investigate the synergistic relationship between NiO and Fe2O3. The product distributions and quality were systematically analyzed, and an asphaltene upgrading index was introduced to evaluate the coke-inhibiting ability of the catalysts. Interestingly, the crystal structure of Fe2O3 in the NiO–Fe2O3 catalysts remarkably influenced the catalytic performance. Particularly, the NiO/α-Fe2O3 catalyst with highly crystalline α-Fe2O3 considerably prolonged the coke induction period up to ∼30% of residue conversion and induced a high deasphalted oil yield from asphaltenes. Moreover, NiO/α-Fe2O3 improved the product quality by removing impurities (S, N, and O) and increasing the H/C ratio. However, the liquid product distribution remained dependent on the thermal cracking effect, as the NiO–Fe2O3 catalysts did not participate in C–C cleavage. Deuterium tracing was performed to elucidate the hydrogen-transfer mechanism in catalytic aquathermolysis. The formation of deuterium–carbon single bonds from catalytic aquathermolysis was three times higher than that in the absence of the catalyst, confirming that NiO/α-Fe2O3 facilitated hydrogen transfer from water molecules to hydrocarbons during aquathermolysis.

Fabrication and microwave absorption properties of BaTiO3 -SrTiO3-Ni0.5Zn0.5Fe2O4 polymer nanocomposites

In this present work, barium titanate (BaTiO3), strontium titanate (SrTiO3) and nickel zinc ferrite (Ni0.5Zn0.5Fe2O4) were used to prepare electromagnetic wave absorption composite. Homogeneous polymer composites containing of BaTiO3 -SrTiO3 – Ni0.5Zn0.5Fe2O4 was produced by the physical mixing method. Surface morphology of polymer composites was characterized by scanning electron microscopy (SEM). Microwave absorbing and electromagnetic parameters were recorded by vector network analyzer (VNA).The influence of the ratio of nickel-zinc magnetic particles into the dielectric materials was studied. Microwave absorption properties of polymer composites were determined by complex permittivity measurement and the effects of the barium titanate, strontium titanate and nickel-zinc magnetic particles on the microwave absorption properties were examined in the frequency range of 2–16 GHz. Real and imaginary parts of complex permittivity and permeability were determined by reflection/transmission technique. The dielectric interactions between two different dielectric materials were investigated and the role of Ni0.5Zn0.5Fe2O4 ferrite in the composite has been explored. Results showed that The RL of absorber composites with thickness of 3.0 mm reached a maximum value of −9.47 dB in the frequency range from 2.00 to 16.00 GHz and demonstrated that the nanocomposites could be use as electromagnetic absorber.

Confinement of ionomer for electrocatalytic CO2 reduction reaction via efficient mass transfer pathways.

Gas diffusion electrodes (GDEs) mediate the transport of reactants, products and electrons for the electrocatalytic CO2 reduction reaction (CO2RR) in membrane electrode assemblies. The random distribution of ionomer, added by the traditional physical mixing method, in the catalyst layer of GDEs affects the transport of ions and CO2. Such a phenomenon results in elevated cell voltage and decaying selectivity at high current densities. This paper describes a pre-confinement method to construct GDEs with homogeneously distributed ionomer, which enhances mass transfer locally at the active centers. The optimized GDE exhibited comparatively low cell voltages and high CO Faradaic efficiencies (FE>90%) at a wide range of current densities. It can also operate stably for over 220h with the cell voltage staying almost unchanged. This good performance can be preserved even with diluted CO2 feeds, which is essential for pursuing a high single-pass conversion rate. This study provides a new approach to building efficient mass transfer pathways for ions and reactants in GDEs to promote the electrocatalytic CO2RR for practical applications.

Impact of CuO loading for enhanced photocatalytic performance of CdS/CuO photocatalyst on rhodamine 6G dye decomposition under ultraviolet irradiation

In this study, we have incorporated different ratios of copper oxide (CuO) into cadmium sulphide (CdS) to fabricate CdS/CuO binary composites that are utilized as an efficient photocatalyst for rhodamine 6G (R6G) dye decomposition under ultraviolet (UV) exposure. CdS and CuO formed by precipitation and annealing were combined to form composites using a wet physical mixing method. X-ray diffraction (XRD) analysis reveals the preservation of their respective crystalline phases in the composite. Scanning electron microscopy (SEM) images imply that the interface between CuO and CdS improves with increasing CuO content. The coexistence of CuO and CdS compounds could also be verified by Fourier-transform infrared spectroscopy (FTIR) analysis. Also, the UV–Vis absorbance spectra demonstrate a significant increase in absorption intensity accompanied by a bandgap narrowing, which is beneficial for photocatalytic activity. The photocatalytic degradation rate and efficiency are significantly enhanced with CuO loading, with the highest constant rate obtained being as 4.69 × 10-3 min−1. Conclusively, the present CdS/CuO composite can serve as a vital catalyst for environmental sustainability, especially in wastewater remediation.