UV Light Region Research Articles

TiO2 Catalysts Co-Modified with Bi, F, SnO2, and SiO2 for Photocatalytic Degradation of Rhodamine B Under Simulated Sunlight

The organic pollutants discharged from industrial wastewater have caused serious harm to human health. The efficient photocatalytic degradation of organic pollutants under sunlight shows promise for industrial applications and energy utilization. In this study, a modified TiO2 photocatalyst doped with bismuth (Bi) and fluorine (F) and composited with SnO2 and SiO2 was prepared, and its performance for the degradation of Rhodamine B (RhB) under simulated sunlight was evaluated. Through the optimization of the doping levels of Bi and F, as well as the ratio of SnO2 and SiO2 to TiO2, the optimal catalyst reached degradation efficiency of 100% for RhB within 20 min under simulated sunlight, with a first-order reaction rate constant of 0.291 min−1. This value was 15, 41, 6.5, and 3.3 times higher than those of TiO2/SnO2, Bi/TiO2, Bi-TiO2/SnO2, and F/Bi-TiO2/SnO2, respectively. The active species detection showed that h+ was the most crucial active species in the process. The role of Bi and F addition and SnO2-SiO2 compositing was investigated by characterization. Bi formed a chemical bonding with TiO2 by doping into TiO2. The absorbance intensity in the UV and visible light regions was improved by SnO2 and F modification. Composite with SiO2 led to a larger surface area that allowed for more RhB adsorption sites. These beneficial modifications greatly enhanced the photocatalytic activity of the catalyst.

Satellite dish-like nanocomposite as a breakthrough in single photon detection for highly developed optoelectronic applications

A nanocomposite with a unique satellite dish-like structure, termed arsenic (III) oxide iodide (AsO2I)/polypyrrole (Ppy) intercalated with iodide ions (AsO2I/Ppy-I), has been meticulously developed via a two-step process. It features natural satellite dish-like nanostructures, potentially serving as nanoresonators for efficient single photon absorption. With a bandgap of 2.8 eV, the AsO2I/Ppy-I nanocomposite efficiently absorbs photons in the UV and visible light regions, making it suitable for single photon detection. Impressive performance is seen in photocurrent sensitivity measurements, recording values of 0.017 mA.cm−2 under white light and 0.009 mA.cm−2 under monochromatic light at 340 nm. Additionally, it exhibits high responsivity and detectivity, with peak values at wavelengths of 340 nm and 440 nm associated with the diameter of the Satellite dish nanostructure. Cost-effectiveness and simple synthesis methods make it attractive for industrial applications, while its unique structural characteristics and enhanced optical properties position it as a valuable asset in optoelectronic technologies. It holds promise as a leading material in advanced quantum technology, marking a significant leap forward in optoelectronic technologies, with potential applications in quantum cryptography, communication, and computing.

Auto-combustion synthesis and characterization of La2CrMnO6/g-C3N4 nanocomposites in the presence trimesic acid as organic fuel with enhanced photocatalytic activity towards removal of toxic contaminates

Constructing semiconductor materials based on layered graphitic carbon nitride (g-C3N4) and metal oxides can help in extending the lifetime of charge carriers and aid in resolving the low number of active sites on their surface for light-driven processes. Herein, we initially designed La2CrMnO6 nanostructures through trimesic acid-assisted auto-combustion route and subsequently, La2CrMnO6/g-C3N4 nanocomposites were prepared by ultrasonic-assisted co-precipitation method with improved UV-catalytic performance. The shape, size distribution and various properties of nano-sized products were measured via diverse description systems of microscopic and spectroscopic. The photocatalytic performances of the La2CrMnO6 nanoparticles and La2CrMnO6/g-C3N4 nanocomposites were compared by degradation of artificial dyes under the UV-light region. Besides, the impacts of dye type, diverse weight percentages of g-C3N4:La2CrMnO6 in composite, scavenger kind and dye solution concentration were studied on modifying ability of nano-catalyst utility. The outcomes manifested La2CrMnO6/g-C3N4 (80:20) nanocomposites have the greatest efficiency, where the highest MO decomposition of 80.98 % was achieved at 10 ppm within 90 min of irradiation. Moreover, the feasible mechanism of MO elimination by UV catalytic purpose was considered.

Computational exploration of Cs2LiMoX6 (X=Cl, I) halide double perovskites: Unveiling energy storage potentials

Density functional theory (DFT) simulations were conducted to investigate the physical characteristics of materials Cs2LiMoCl6 and Cs2LiMoI6. The magnetic and electronic features were examined using the Perdew, Burke, and Ernzerhof generalized-gradient approximation (PBE-GGA). Confirmation of the semiconductor behavior was attained through the spin-resolved density of states (DOS) and band structure (BS) plots. In this investigation, the computed band gap (Eg) values for Cs2LiMoI6 are identified as 0.96 eV in the spin-down channel and 1.76 eV in the spin-up channel. Likewise, for Cs2LiMoCl6, the Eg is determined to be 3.35 eV in the spin-down channel and 1.63 eV in the spin-up channel. From magnetic characteristics, the magnetic moments (μB) of 3.02436 μB and 3.00332 μB are calculated for Cs2LiMoCl6 and Cs2LiMoI6, respectively. The ferromagnetic (FM) nature is observed from the integral values of the magnetic moment. The Mo-4d-t2g orbitals play a pivotal role in determining the magnetic properties observed in perovskite materials. The study also explored optical properties, and the values of ε1(ω) at zero energy are approximately 4.84 and 3.20 for Cs2LiMoI6 and Cs2LiMoCl6, respectively. The maximum values of σ(ω) are observed to be 4631 (Ω cm)−1 and 3618 (Ω cm)−1 at 6.24 eV and 8 eV for Cs2LiMoI6 and Cs2LiMoCl6, respectively, signifying their suitability to the UV light region. Overall, these findings suggest the suitability of both materials for photovoltaics and other related applications.

Modulating spectral response of raw photosynthetic pigments via ternary cadmium chalcogenide quantum dots: simultaneous enhancement at green spectrum and inhibition at UV region.

Photosynthesis relies on the absorption of sunlight by photosynthetic pigments (PPs) such as chlorophylls and carotenoids. While these pigments are outstanding at harvesting light, their natural structure restricts their ability to harvest light at specific wavelengths. In this study, Oleic acid-capped CdSeS and CdTeS ternary quantum dots (QDs) were synthesized using a novel two-phase synthesis method. Then, these QDs were used to interact with raw PPs, a mixture of chlorophylls and carotenoids isolated from spinach. Our findings revealed the following: (1) Interacting QDs with raw PPs effectively inhibited the chlorophyll fluorescence of the pigments upon excitation in UV light region (250-400nm) without causing any damage to their structure. (2) By forming an interaction with QDs, the chlorophyll fluorescence of raw PPs could be induced through excitation with green-light spectrum. (3) The composition of the QDs played a fundamental role in their interaction with PPs. Our study demonstrated that the photophysical properties of isolated PPs could be modified by using cadmium-based QDs by preserving the structure of the pigments themselves.

Multicomponent Photocatalytic-Dispersant System for Oil Spill Remediation.

In the present work, the potential application of a fabricated halloysite nanotubes-Ag-TiO2 (HNT-Ag-TiO2) composite loaded with a binary surfactant mixture made up of lecithin and Tween 80 (LT80) in remediating oil spillages was examined. The as-prepared Ag-TiO2 that was used in the fabrication of the HNT-Ag-TiO2-LT80 composite was characterized by X-ray diffraction, Raman spectroscopy, UV-vis and diffuse reflectance spectroscopy, CV analyses, and SEM-EDX. The synthesized composite was also characterized by thermogravimetric analysis, Fourier-transform infrared spectroscopy, and scanning electron microscopy-energy dispersive X-ray spectroscopy. The synthesized composite was active in both the UV and visible light regions of the electromagnetic spectrum. The oil-remediating potential of the as-prepared composite was examined on crude oil, and aromatics and asphaltene fractions of crude oil. The composite was able to reduce the surface tension, form stable emulsions and smaller oil droplet sizes, and achieve a high dispersion effectiveness of 91.5%. A mixture of each of the crude oil and its fractions and HNT-Ag-TiO2-LT80 was subjected to photodegradation under UV light irradiation. The results from the GC-MS and UV-vis analysis of the photodegraded crude oil revealed that the photocatal composite was able to photodegrade the crude oil, aromatics, and asphaltene fractions of crude oil with the formation of intermediate photodegradation products depicting that the HNT-Ag-TiO2-LT80 has a potential as an oil spill remediation material.

Photocatalytic Hydrogen Evolution of TiZrNbHfTaOx High-Entropy Oxide Synthesized by Mechano-Thermal Method.

One of the most promising solutions to slow down CO2 emissions is the use of photocatalysis to produce hydrogen as a clean fuel. However, the efficiency of the photocatalysts is not at the desired level, and they usually need precious metal co-catalysts for reactions. In this study, to achieve efficient photocatalytic hydrogen production, a high-entropy oxide was synthesized by a mechano-thermal method. The synthesized high-entropy oxide had a bandgap of 2.45 eV, which coincided with both UV and visible light regions. The material could successfully produce hydrogen from water under light, but the main difference to conventional photocatalysts was that the photocatalysis proceeded without a co-catalyst addition. Hydrogen production increased with increasing time, and at the end of the 3 h period, 134.76 µmol/m2 h of hydrogen was produced. These findings not only introduce a new method for producing high-entropy photocatalysts but also confirm the high potential of high-entropy photocatalysts for hydrogen production without the need for precious metal co-catalysts.

Cellulose nanocrystal synergistically enhanced polyurethane composites via fish‐net microstructure: Light shielding and mechanical properties

AbstractThe synergistically enhanced polyurethane (PU) composites, in which the cellulose nanocrystal (CNC) was incorporated, were in situ polymerized and then the increasingly closer grid network structures for PU/CNC composites were achieved by adjusting chain extenders and adding different low contents of CNC, due to the introduction of different hard segments or the evolution of spherulites. As a result, the onset of the light transmission of PU elastomers and CNC‐filled composites showed an obvious red shift from UV light to visible light region, which meant that all UV light regions could be shielded entirely. Therefore, compared with Rhodamine B in water solution unprotected, the excellent UV‐light shielding was further verified by the inefficient photodegradation of Rhodamine B in water solution protected by PU‐PDA, PU‐BDI or PU‐PDA/CNC films under UV‐light irradiation. Meanwhile, enhanced light shielding behavior for PU‐PDA composites was observed with adding the CNC fillers. Moreover, the significantly enhanced mechanical properties were achieved, more than two or three times at elastic modulus, tensile strength and elongation at break. Finally, synergistically Enhanced mechanical properties in PU composites were found. Therefore, the study was of great significance in the potential light application.

Non-synthetic luminescent graphene quantum dots in coconut water for aniline sensing applications

We report, for the first time, on non-synthetic luminescent graphene quantum dots (GQDs) which are found to naturally exist in coconut water. Identification of these GQDs was made using HRTEM, XRD, FTIR and XPS measurements. It was found that such naturally occurring GQDs have dual sizes with average size values of 4.5 nm and 6.1 nm and show luminescence in the UV and blue light regions, respectively. The obtained GQDs also show a unique excitation - independent emission and have a luminescence quantum yield of 0.6 %. The dots were utilized interestingly as an efficient luminescence turn-on optical sensor for aniline liquid detection with a low detection limit 0.234 µM.

Sol-gel extended hydrothermal synthesis of BiFeO3 nano-beads for excellent photocatalytic and photo-electrochemical properties under natural light irradiation

The synthesized BiFeO3haslow cost,distinctive structure,large specific surface area, and outstanding electrical and mechanical properties, making itstable, non-toxic, and cost-effective material that can be used in photocatalytic applications. Here, we report the successful synthesis of a pure-phase BiFeO3nano-beads through a well-controlled sol–gel extended hydrothermal strategy. The structural, morphological, and optical properties of as-prepared BiFeO3nano-beads were studied by X-ray Diffractometer (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), energy dispersive spectroscopy (EDS), Brunauer-Emmett-Teller (BET) and Ultraviolet–visible–near-infrared (UV–vis–NIR) transmittance spectrophotometer. It was observed that BiFeO3nano-beads exhibit strong absorption in the UV and visible light region and the corresponding lowest band gap has been estimated to be 2.13 eV. The photo-electrochemical (PEC) properties of the prepared photo-anodes were analyzed with electrochemical impedance spectroscopy (EIS) and chronoamperometry analysis (CA). Electron transfer of the charge carriers and transient photo-current response were enhanced for BiFeO3nano-beads as studied by EIS and CA. The as-prepared BiFeO3nano-beads showed excellent photocatalytic and photo-electrochemical (PEC) properties for enhanced degradation of methylene blue (MB) and hydrogen evolution activity (14.7 mmol g−1h−1) in the presence of Platinum asco-catalyst were carried out under natural light irradiation at ambient temperature.

Multi-responsive P(DMAEMA-co-COU) hydrogel for temperature sensor and information encryption

Multi-responsive hydrogels for temperature sensor and information encryption were developed through the synergistic application of light, temperature and pH response of the hydrogel. The multi-responsive hydrogels were prepared by copolymerization of dimethylaminoethyl methacrylate (DMAEMA) and 7-(2-methacryloyloxyethoxy)-4-methylcoumarin (CoumMAc). Through incorporating coumarin groups into the hydrogels, the crosslinking degree of hydrogels could be increased by photo-crosslinking of polymer chains based on the photodimerization of coumarin groups. After the hydrogel was irradiated by a photomask under UV light (365 nm), the irradiated and unirradiated region in the hydrogel showed different crosslinking degrees, leading to different volume phase transition temperature (VPTT) in the two region of the hydrogel. The pattern in the hydrogel appeared only within a specific temperature range, and the temperature of the environment can be monitored by the prepared hydrogel sensor. After soaking the patterned hydrogel in the acidic solution, no pattern information was displayed at all temperatures, and the pattern information can only emerge by dual decryption (base and temperature). In addition, the information can be erased by UV light (254 nm), which further ensures information security. This work provide a new way for low-cost unpowered temperature sensors and information encryption with more security.

Development of a new CoS-Supported ZnAl2O4 catalyst for the visible photodegradation of a basic textile dye from water

The material is proven competitive for the solar treatment of wastewater from the textile industry -an essential source of water pollution worldwide. The system was prepared following a two-step hydrothermal method, showing photon absorption properties across the solar spectrum's UV and visible light regions. The main responsible species driving the photocatalytic process are proposed based on degradation experiments using appropriate scavengers. Further studies include consideration of operational parameters and cycling experiments to evaluate the stability of the catalyst. The results showed complete degradation (100%) based on dye bleaching and >90% mineralization of the dye based on total organic carbon analysis using dye concentrations of 20 ppm and catalyst loading of 1 g/l. Our findings point to sulfide-supported spinel materials as promising candidates for advanced solar oxidation technologies for wastewater treatment.

Synthesis of Fluorescent Carbon Dots from Soybean Residuals Using Hydrothermal Method

Soybean residuals are biowaste composed of carbon chains and amine groups bounded in peptide linkages. The component was identified through FTIR analysis which showed the vibration of the diamide bond (N=C=N) at wave number 2132cm-1. Owing to the existence of these components, soybean has the potential to be used as a precursor to synthesize carbon nano-material, such as Carbon Dots (C - Dots). In this study, the synthesis of C - Dots material from soybean residuals was carried out using the facile hydrothermal method at a temperature of 200 oC for 6 hours. Afterward, the as-synthesized C - Dots were analyzed for their optical property, structure, and morphology. Based on the analysis of the UV - Vis and photoluminescent spectra, C - Dots exhibited absorbance peaks of 292 nm and 301 nm in the UV light region, and fluorescence emission peaks of 468 nm, with blue luminescence characteristics. The observation was supported by the morphological analysis using the HR - TEM, C - Dots exist in a spherical shape with an average particle size of 3.467 nm and a lattice distance of 0.363 nm. Besides, the C - Dots exhibited a good quantum yield of 28.15 %. From the results of the analysis, it is known that the synthesis of C - Dots material has been successfully carried out with particle size < 10 nm.

Tightly contacted heterojunction of ZnS/ZIS/In2S3: In situ construction from ZIF-8@MIL-68(In) and visible-light induced photocatalytic hydrogen generation

The construction of a tightly contacted heterojunction consisting of multi-components is proven to be one of the effective strategies to promote the photogenerated charges separation and to develop high-efficient photocatalysts in hydrogen evolution. Herein, a ternary hollow heterostructure of ZnS/ZIS/In2S3 has been fabricated by using a binary MOF@MOF (ZIF-8@MIL-68(In)) as the precursor, and an in-situ sulfurization of ZIF-8@MIL-68(In) is controlled to optimize the photocatalytic performances. The resulting samples are signed as Z@M-t, where the t is pointed to the sulfurization time being varied from 4 h to 48 h. It’s shown that the hierarchical and hollow architecture is formed for Z@M-t, and with the reinforced light harvest ability in both UV and visible light regions. In the subsequent visible-light-induced photocatalytic hydrogen generation, the optimized Z@M-24 manifests significantly improved hydrogen evolution rate of 607.34 μmol g-1 h−1, which values are evidently higher than that by the single MOF and binary ZIF-8@MIL-68(In) heterostructure. The electrochemical analyses and the electron paramagnetic resonance (EPR) spectrum were analyzed to clarify the charge transfer routes and the enhanced photocatalytic mechanism, in which the contribution of each metal sulfide is also discussed. Finally, the good photocatalytic stability and reusability of Z@M-24 heterostructure are also represented, which define the structure superior brought by the effective heterojunction based on the in-situ sulfurization strategy of binary ZIF-8@MIL-68(In), and determine their prospect applications in the efficient H2 production under visible light irradiation.

Preparation of nickel-bismuth titanates enhanced visible-light photosensitivity and their photocatalytic properties for hydrogen generation by plasma cracking

Nickel-bismuth titanate was newly synthesized to develop a photocatalyst with better visible-light sensitivity than nickel titanate, which is known among perovskites to have high photocatalytic activity in visible light. Compared to nickel titanate, nickel-bismuth titanate prepared by the solvothermal method combined with the sol-gel method exhibited superior light absorption ability in the UV and visible light regions. The band gap energy of nickel titanate was 2.48 eV, whereas that of nickel-bismuth titanate was lower at 2.41 eV. The photocatalytic activity was evaluated by applying nickel-bismuth titanate to the liquid-phase plasma-cracking process of ammonia water for hydrogen generation. When the liquid plasma was discharged into ammonia water, a strong emission spectrum was observed under both UV and visible light. A strong emission peak related to hydrogen production was observed at 656 nm. The hydrogen production rate from the cracking of ammonia water under liquid plasma radiation was higher for nickel-bismuth-titanate than for nickel titanate. Among the nickel-bismuth titanates, Ni0.9Bi0.1TiO3 showed the highest absorption capacity at 656 nm visible light and the narrowest band gap, indicating an excellent hydrogen production rate.

Ti-doped Fe2O3 photoanodes on three-dimensional titanium microfiber felt substrate for photoelectrochemical oxygen evolution reaction

The macroporous structure of conductive substrates with large surface areas is crucial for fabricating semiconductor electrodes that offer better photoelectrochemical (PEC) performance in the water-splitting reaction. In this study, three-dimensional (3D) titanium microfiber felt (Ti felt) was used as a conductive substrate to prepare a Ti-doped Fe2O3 photoanode via a hydrothermal method with a two-step annealing treatment in air and argon atmospheres. Compared to conventional two-dimensional (2D) substrates, such as fluorine-doped tin oxide (FTO)-coated glass and Ti sheets, the loading amount of Fe2O3 on Ti felt was 2–5 times higher for a similar substrate geometric area. The thickness of Fe2O3 on the Ti felt (∼0.6 µm) was less than that on the 2D substrates. Ti-doped Fe2O3 on Ti felt (Ti-felt/Ti-Fe2O3) exhibits a higher photocurrent density than FTO/Ti-Fe2O3 and Ti-sheet/Ti-Fe2O3. Mott–Schottky analysis shows that the donor density of Ti-felt/Ti-Fe2O3 (8.58 × 1021 cm−3) was more than 10 times higher than that of FTO/Ti-Fe2O3 and Ti-sheet/Ti-Fe2O3. Analyses of the incident photon-to-current conversion efficiency (IPCE) and Faradaic efficiency indicated that Ti-felt/Ti-Fe2O3 showed higher PEC activity for the oxygen evolution reaction (OER) than FTO/Ti-Fe2O3. The enhanced PEC activity is ascribed to the higher donor density and moderate thickness of the Ti-doped Fe2O3 layer, which contribute to a short electron transport distance. Furthermore, the high loading of Fe2O3 on the Ti-felt substrate increased the photoabsorption in the UV and visible light regions and the photocurrent response at wavelengths near the band edge, even at low light intensities. This study provides new insights for preparing hematite photoanodes with higher PEC activity for the OER using a 3D porous substrate, rather than conventional 2D substrates.

Enhanced visible-light photocatalytic activity of Ni(1-x)BixTiO3 prepared by solvothermal method

In this study, a new Ni(1-x)BixTiO3 tannate-based perovskite with excellent photocatalytic properties under visible light was developed. Ni(1-x)BixTiO3 was prepared by a solvothermal method coupled with a sol–gel method. The Ni(1-x)BixTiO3 photocatalyst showed better light absorption than NiTiO3 in the UV and visible light regions. The bandgap energy (∼2.21 eV) of Ni(1-x)BixTiO3 was also smaller than that of NiTiO3. In the decomposition reaction of methylene blue and phenol under visible light (550–650 nm), the decomposition efficiency of the Ni(1-x)BixTiO3 photocatalyst was higher than that of NiTiO3. Among the Ni(1-x)BixTiO3 photocatalysts, Ni0.8Bi0.2TiO3 showed the highest visible light photocatalytic performance.

Structural, electronic and optical properties of monolayer InGeX3 (X = S, Se, Te) by first-principles calculations

Recently, two-dimensional materials have attracted enormous attentions for electronic and optoelectronic applications owing to their unique surface structures and excellent physicochemical properties. Herein, the structural, electronic and optical properties of a series of novel monolayer InGeX3 (X = S, Se, Te) materials are investigated systematically by means of comprehensive first-principles calculations. All these three materials exhibit hexagonal symmetries and dynamical stabilities with no imaginary phonon mode. For monolayer InGeX3 (X = S, Se, Te), there exist obvious In–X ionic bonds and the partially covalent interactions of Ge–Ge and Ge–X. By using the HSE06 method, the band gaps of monolayer InGeX3 are predicted to 2.61, 2.24 and 1.80 eV, respectively. Meanwhile, the p-s orbital hybridizations are happened between X and In atoms in the conduction band regions and their interactions become smaller with the increase of X atomic number. In addition, the dielectric function, absorption coefficient and reflectivity spectra of monolayer InGeS3, InGeSe3 and InGeTe3 show the strong optical peaks along the in-plane direction in the UV light region. The definite bandgaps and optical properties make monolayer InGeX3 (X = S, Se, Te) materials viable candidates for future electronic and optoelectronic applications.

Dispersion-correction density functional theory (DFT+D) and spin-orbit coupling (SOC) method into the structural, electronic, optical and mechanical properties of CH3NH3PbI3

DFT simulations are used to determine the most appropriate approach to reproduce the experimental electronic structure and optical properties besides providing the reliable structural stability of CH3NH3PbI3. In this work, DFT calculations are performed using the generalized gradient approximation (GGA) that includes spin-orbit coupling (SOC) and empirical pairwise dispersion of the DFT + D method to investigate the structural, electronic, optical and mechanical properties of the material. Our results reveal that SOC effects reduced the band gap compared to GGA functional alone. Meanwhile, using the DFT + D method, an improvement in the calculation accuracy of the band gap obtained (1.689eV) is in excellent agreement with the experimental (1.630eV). Further analysis of the electronic properties demonstrates that including SOC reduces the effective masses of electrons due to the creation of splitting at the bottom of the conduction band. We have presented the absorption coefficient to describe the optical properties. It is found that CH3NH3PbI3 exhibit stronger optical absorption in the UV light region (300–400 nm). The mechanical properties of Young's modulus, bulk modulus, shear modulus and Poisson's ratio were calculated using DFT + D. It was discovered that the ratio (B/G) achieved was greater than 1.75, indicating that CH3NH3PbI3 is a ductile material.

Green synthesis of CdWO4 Nanorods with Enhanced Photocatalytic Activity Utilizing Hyphaene Thebaica Fruit

AbstractCdWO4 as one of the metal tungstate family has recently been identified as a strong photocatalyst for the degradation of organic pollutants. Several methods for the synthesis of different CdWO4 forms have been introduced. All these techniques, however, are either costly or environmentally harmful and create tremendous toxic waste. CdWO4 nanorods (NRs) are synthesized using a simple eco‐friendly method, in which for the first time hyphaene thebaica fruit extract is utilized as a reaction stabilizer, as well as the compounds of the extract serve in functionalizing the CdWO4 NRs surface, water is used as a solvent without elevated temperatures involved. The synthesized NRs’ size, structure, morphology, and optical properties are characterized using TEM, XRD, UV‐visible absorption, and Raman spectroscopy techniques. The results demonstrate the successful synthesis of CdWO4 NRs with an average diameter of 40 nm and length of 100 nm. The CdWO4 NRs have high crystallinity, and exhibit absorption in the UV light region. As well, the photocatalytic activities of the as‐synthesized CdWO4 NRs are investigated under UV irradiation, in which Methylene Blue (MB) is used as a model for an organic pollutant. The degradation efficiency of CdWO4 NRs is shown to be 99 % after 90 minutes. The CdWO4 NRs significantly enhance the absorption of light and increase the rate of degradation of MB and the generation and separation of photoinduced charges (i. e. the exciton lifetime). The CdWO4 NRs showed a high‐level degradation rate of MB, as it is fitted with the first‐order kinetic model, this proves that the CdWO4 NRs can have a great potential for the elimination of organic contaminants, and for the treatment of wastewater as a photocatalyst. Moreover, the as‐synthesized CdWO4 NRs can be used in different environmental applications.