Orthorhombic Crystalline Research Articles

Sulphur Nanoparticles: Synthesis using Prosopis Juliflora Leaf Extract, Characterization and Estimation of Antibacterial Ability

This work reports an eco-friendly technique of preparing sulphur nanoparticles by reducing sodium thiosulphate using aqueous extract of prosopis juliflora (PJ) plant leaves under acidic condition. A sharp peak observed at 246nm UV-vis spectral analysis revealed the formation of sulphur nanoparticles from the reaction mixture. Sulphur nanoparticles synthesized from prosopis juliflora leaf extract were further characterized by SEM analysis, FTIR analysis designates functional groups present in the phytochemicals of PJ plant leaves extract involved in stabilization of the above synthesized SNps. Dynamic light scattering technique revealed (DLS) average particles size of the SNps as 229 nm. Polydispersity index (PI) value indicates the SNps prepared in this technique were polydisperse. XRD analysis of the SNps shows characteristics peaks corresponding to the orthorhombic crystalline structure of SNps. Synthetic SNps also showed their antibacterial ability against common pathogenic diseases causing microbe such as Escherichia coli (E. Coli) and Staphylococcus aureus (S. aureus). Hence, it is suggested that the green synthesized SNps have been used as antibacterial agents.

Effect of reaction parameters on WOx nanostructures by the solvothermal process

In this work, nanowires and nanorods of WOx have been synthesized by the solvothermal method. The effect of reaction time and acetic acid as solvent were studied. X-ray diffraction (XRD) patterns showed the monoclinic WO2.72, WO2.79, and orthorhombic WO3 crystalline structures. Scanning Electron Microscopy (SEM) and High-Resolution Transmission Electronic Microscopy (HRTEM) images presented nanostructures such as nanowires and nanorods at different sizes. Band gap energies were supplied by Ultra Violet visible (UV-vis) absorption spectra. The Photoluminescence (PL) spectra exhibited three emission peaks in the blue zone at 440, 460, and 484 nm. X-ray Photoelectron Spectroscopy (XPS) was used to calculate W6+, W5+, and W4+ oxidation states. The results showed that increasing the reaction time from 10 h to 24 h affected the crystalline structure from monoclinic to orthorhombic. Moreover, with the addition of acetic acid as solvent, the crystal structure is not affected but stabilizes the monoclinic phase in the course of time.

Electrical and dielectric properties of self-assembled polyaniline on barium sulphate surface

Solid polymer electrolytes have been broadly studied due to their wide applications in various electrochemical devices. In the present work, the electrical properties of polyaniline and its composites with BaSO 4 have been studied. The polymerization of aniline monomer via the ordinary chemical polymerization process showed an amorphous structure. Whereas, in the presence of BaSO 4 as a seed, the aniline is polymerized in an orthorhombic crystalline structure on the BaSO 4 -surface. Two composite samples of PANI and BaSO 4 with different amounts of BaSO 4 (1.5 and 2.5 wt%) were prepared and analyzed using XRD, FT-IR, SEM, and XPS techniques. The ac- electrical studies on the composites showed an enhancement in the electrical conductivity of PANI due to the addition of BaSO 4 . Ac- conductivity at frequency 500 kHz, and 100 °C, showed values of 1.9 × 10 −3 , 5.4 × 10 −4 , 1.6 × 10 −1 , and 1.9 × 10 −1 S/cm for PANI, BaSO 4 , BaSO 4 /PANI 1.5 wt%, and BaSO 4 /PANI 2.5 wt%, respectively.

Ultrafast Microwave Synthesis of WO3 Nanostructured Films for Solar Photocatalysis

Tungsten oxide (WO3) nanostructured films are synthesized under microwave radiation with synthesis times of 5 and 10 min, at 150 or 180 °C. This ultrafast synthesis route results in uniform and well‐crystallized WO3 nanostructured films fully covering the substrates. A plate‐like hierarchical structure is observed at 150 °C, and closely packed rectangular nanorods are formed at 180 °C. For both temperatures, the nanostructures self‐organize into larger flower‐like structures. The increase of the synthesis time from 5 to 10 min at 180 °C results in thicker films, reaching ≈4 μm. X‐ray diffraction (XRD) and Raman spectroscopy reveal that the films grow with the WO3 orthorhombic crystalline phase (o‐WO3·0.33H2O). Photoluminescence (PL) measurements are performed for all the films, and their optical bandgaps are estimated through diffuse reflectance spectroscopy. The WO3 films have their photocatalytic activity assessed from rhodamine B (RhB) degradation under solar radiation. The Mott–Schottky plots confirm the n‐type character of the films with the flat‐band potentials and electron concentrations being estimated for the best photocatalysts. This study associates the eco‐friendly, fast, and low‐cost aspects of the synthesis route to the production of highly photoactive materials, which can effectively contribute to environmental remediation.

Green synthesis of LaCrO3 powder mediated by the extract of the Amazon rainforest native plant Himatanthus drasticus (Mart.) Plumel and their photocatalytic activity

Lanthanum chromite (LaCrO3) powder was successfully synthesized by plant-extract-assisted sol–gel method using milk of Janaguba (Himatanthus drasticus (Mart.) Plumel) as an eco-effective chelating agent. X-ray diffraction (XRD), Rietveld refinement, Fourier-transform infrared spectroscopy (FT-IR), and Scanning electron microscopy (SEM) analysis revealed an orthorhombic crystalline structure, with average crystallite and particle sizes of ~40 and ~640 nm, respectively, confirming the obtaining of LaCrO3 powder. UV–vis absorption spectrum reveals a band with a well-defined maximum in the range of 230–350 nm, with an optical band-gap energy value of 3.33 eV. The photocatalytic degradation efficiency of MB in the presence of LaCrO3 as photocatalyst after 120 min of illumination (in low light intensity of 2.87 Wcm−2) was 6.3%. Therefore, our study provides preliminary evidence that the LaCrO3 powder is a potential photocatalyst for MB dye degradation, a pigment widely used by the textile industry that generates large amounts of effluents to be treated. Finally, the present synthesis proposal presents a cheap and eco-friendly alternative for the production of LaCrO3 powder.

Photocatalytic Activity of Cu2S/WO3 and Cu2S/SnO2 Heterostructures for Indoor Air Treatment.

Volatile organic compounds (VOCs) are commonly found in indoor spaces (e.g., homes or offices) and are often related to various illnesses, some of them with carcinogenic potential. The origins of VOC release in the indoor environment are in office products, building materials, electronics, cleaning products, furniture, and maintenance products. VOC removal can be done based on two types of technologies: adsorption in specific materials and decomposition via oxidative processes. The present article reports the development and photocatalytic activity of two heterostructures (Cu2S/WO3 and Cu2S/SnO2) used for indoor air decontamination. The acetaldehyde removal rate is discussed in correlation with the S-scheme mechanisms established between the heterostructure components but also comparatively with the bare catalysts’ activity. Acetaldehyde was considered as a VOC reference because it was found by the International Agency for Research on Cancer to be one of the most frequent air toxins with potential carcinogenic effects. The samples contained monoclinic WO3, tetragonal SnO2, and orthorhombic Cu2S crystalline structures. The Cu2S crystallite size in the heterostructure varied from 75.9 to 82.4 Å, depending on the metal oxide substrate. The highest photocatalytic efficiency (75.7%) corresponded to Cu2S/SnO2, with a constant rate of 0.106 s−1 (which was three times faster than WO3 or SnO2 and seven and a half times faster than Cu2S).

Stretchable AgX (X = Se, Te) for Efficient Thermoelectrics and Photovoltaics.

Transition metal chalcogenides (TMCs) have gained worldwide interest owing to their outstanding renewable energy conversion capability. However, the poor mechanical flexibility of most existing TMCs limits their practical commercial applications. Herein, triggered by the recent and imperative synthesis of highly ductile α-Ag2S, an effective approach based on evolutionary algorithm and ab initio total-energy calculations for determining stable, ductile phases of bulk and two-dimensional AgxSe1-x and AgxTe1-x compounds was implemented. The calculations correctly reproduced the global minimum bulk stoichiometric P212121-Ag8Se4 and P21/c-Ag8Te4 structures. Recently reported metastable AgTe3 was also revealed but it lacks dynamical stability. Further single-layered screening unveiled two new monolayer P4/nmm-Ag4Se2 and C2-Ag8Te4 phases. Orthorhombic Ag8Se4 crystalline has a narrow, direct band gap of 0.26 eV that increases to 2.68 eV when transforms to tetragonal Ag4Se2 monolayer. Interestingly, metallic P21/c-Ag8Te4 changes to semiconductor when thinned down to monolayer, exhibiting a band gap of 1.60 eV. Present findings confirm their strong stability from mechanical and thermodynamic aspects, with reasonable Vickers hardness, bone-like Young's modulus (E) and high machinability observed in bulk phases. Detailed analysis of the dielectric functions ε(ω), absorption coefficient α(ω), power conversion efficiency (PCE) and refractive index n(ω) of monolayers are reported for the first time. Fine theoretical PCE (SLME method ∼11-28%), relatively high n(0) (1.59-1.93), and sizable α(ω) (104-105 cm-1) that spans the infrared to visible regions indicate their prospects in optoelectronics and photoluminescence applications. Effective strategies to improve the temperature dependent power factor (PF) and figure of merit (ZT) are illustrated, including optimizing the carrier concentration. With decreasing thickness, ZT of p-doped Ag-Se was found to rise from approximately 0.15-0.90 at 300 K, leading to a record high theoretical conversion efficiency of ∼12.0%. The results presented foreshadow their potential application in a hybrid device that combines the photovoltaic and thermoelectric technologies.

Structural, Opticaland Morphological Properties Of Zn And Mg Co-Doped V2O5 Thin Filmnanostructures

The research study reveals metallic co-doping of Zinc(Zn) and Magnesium (Mg) on vanadium pentoxide(V2O5) thin film nanostructures by spray pyrolysis deposition technique. The studyfindings have been made into how the morphological, structural and optical properties of the materials change for the different co-doping percentage of 1%,3%,5%10% of Zn-Mg. X-ray diffraction (XRD)clearly showsan orthorhombic crystalline structure with polycrystalline nature.The dopantZn and Mginfused into the V2O5 matrixand is confirmed by EDAX images. A field emission scan electron microscope was used to examine surface morphology whichreveals that grain structure has beenmodified by increasing the doping content. It is evident from theatomic force microscopy (AFM) images that the effect of Zn and Mg on V2O5 thin filmshave enhanced surface roughness.The transmittance and energy bandgap (Eg) of the film found to be decreased with an increase in doping concentration whereas absorbance varieswith doping levels.The research findings suggest that the Zn-Mg co-doped V2O5 thin films could be a potential source for energy,optical and sensor-based device applications.

Physicochemical Characterization of Unripe and Ripe Chontaduro (Bactris gasipaes Kunth) Fruit Flours and Starches

AbstractThe functional applications of chontaduro (Bactris gasipaes Kunth) flour and starches depend on its ripeness state. However, there are no reports of the physicochemical properties of chontaduro flours and starches nor their associated fatty acid profile. This research aimed to study the physicochemical properties of ripe/unripe chontaduro flours, isolated starches, and fats. Compared to unripe flour, ripe flour exhibited higher (p<0.05) protein (16.79%) but lower lipid content (‐25.72%). Minerals such as K, S, Ca, P, and Mg were the most abundant in the flours (0.025–0.030 g 100 g−1). Ripeness did not impact the morphology of the starch granules and its orthorhombic crystalline structure, but the cooking process partially damaged this structure, characteristic of A‐type starches. Ripe flour showed higher viscosity than unripe flour, while defatted flour did not exhibit increased peak viscosity due to fatty acid loss. There are no changes in the infrared spectra of the oil from unripe/ripe flour, but stearic, oleic, and palmitic acids were identified. The results suggested that chontaduro flour is an important source of minerals (mainly K, S, Ca, P, Mg, and Na), unsaturated fatty acids, and low‐viscosity starch, making it a suitable nutritious ingredient to supplement existing food line under functional terms.

Effect of annealing and heat-moisture pretreatments on the oil absorption of normal maize starch during frying

The impacts of two hydrothermal pretreatments, annealing (ANN) and heat moisture treatment (HMT), on oil-absorption by normal maize starch (NMS) during frying were investigated using low-field nuclear magnetic resonance (LF-NMR). The structural organizations of the fried samples were also evaluated using SEM, XRD, ATR-FTIR, and DSC, respectively. Both hydrothermal pretreatments significantly reduced the total oil content in the starch after frying, with the magnitude of the effect depending on the treatment conditions used. SEM showed that the pretreated fried starch granules preserved more of their original morphology. XRD, FTIR, and DSC showed that both pretreatments preserved more of the short-range double helices and long-range organizations within the orthorhombic crystalline structure for NMS during frying. The promoting effect of ANN/HMT on the interactions of starch molecules and the rearrangement of double helices were hypothesized to be responsible for the increased thermal stability of starch granules in the present work. As a result, fried starch pretreated by ANN/HMT were more organized and more compact than fried NMS, thus inhibiting oil absorption during frying.

Bandgap tuning of polyvinyl alcohol capped alloyed Sn1-xCuxS nanostructures for optoelectronic applications

• Optical bandgap of Sn 1-x Cu x S nanostructures has been tuned from for optoelectronics. • Structural and optical properties of PVA capped Sn 1-x Cu x S have been investigated. • XRD measurements reveal the formation of the orthorhombic structure of Sn 1-x Cu x S. • Gaussian fitting software was used to de-convolute the XRD peaks of Sn 0.7 Cu 0.3 S. In this work, the optical bandgap of polyvinyl alcohol (PVA) capped Sn 1-x Cu x S nanostructures have been tuned for optoelectronic applications. PVA capped Sn 1-x Cu x S (x: 0 to 0.30) nanostructures were prepared via chemical route. X-ray diffraction (XRD), FT-IR and UV–visible-NIR spectra measurements techniques were utilized to explore the structure, bonds’ vibrations and optical properties of the prepared nanostructures. XRD measurements reveal the crystalline nature of the prepared samples with the orthorhombic crystalline structure. Gaussian fitting software was used to de-convolute the XRD peaks of the capped Sn 0.7 Cu 0.3 S nanostructures. The crystallite size, micro strain and dislocation density of the capped Sn 1-x Cu x S nanostructures are investigated. FT-IR spectra analysis exhibits the successes of Cu alloying in the host SnS material. The UV–visible-NIR transmittance spectra of Sn 1-x Cu x S nanostructures are red-shifted to longer wavelength regions as × increases up to 0.15 and then it blue-shifted again to lower wavelength regions. The estimated optical bandgap of Sn 1-x Cu x S nanostructures is tuned from 1.83 eV to 1.25 eV as Cu molar ratio is increased up to 0.15, and it increases again to 1.36 eV as × is further increased to 0.30. These novel results are interpreted in terms of the created inter-band energy levels and quantum confinement effect. As environmentally-friendly nanostructures, PVA capped Sn 1-x Cu x S are highly appreciated in the scientific medium for optoelectronic applications.

Correlation of luminescence measurements to the structural characterization of Pr3+-doped HfSiOx

Abstract Luminescence and structural properties of Pr3+ doped HfSiOx thin layer elaborated by magnetron sputtering have been investigated as a function of the annealing temperature. The emission properties of Pr3+ ions were studied using photoluminescence (PL) and cathodoluminescence (CL) spectroscopies. Phase separation between amorphous SiO2 and crystallized HfO2 nano-grains occurring in the HfSiOx matrix has been investigated by atom probe tomography and transmission electron microscopy with particular consideration for the Pr distribution. Both PL and CL measurements evidenced a strong emission originating from Pr3+ ions in the visible range for an annealing temperature higher than 950°C. At 950°C, Pr3+ ions are clearly located in HfO2 nano-grains of cubic structure. Regarding PL, no significant changes are observed between 950°C and 1050°C. However, CL measurements revealed new emission peaks in the infrared range after an annealing at 1050°C, corresponding to the appearance of a new orthorhombic crystalline structure of HfO2 nano-grains in the thin layer. The CL signal evolution as a function of the annealing treatment is discussed in regard to the evolution of structural properties.

Physicochemical characterization of Amaranth starch insulated by mechanical separations

This work focused on the physicochemical properties of isolated Amaranth starch. Inductively coupled plasma (ICP) showed that amaranth is low-lipid calcium and magnesium source for the human diet. Scanning Electron Microscopy showed that isolated granules are in the range of sub and micro size. DSC starch thermogram showed a gelatinization temperature of 67.9°C and an enthalpy of 10. 6J/g suggesting the presence of an ordered crystalline structures. High-resolution X-ray diffraction showed the isolated starch contents nanocrystals with an orthorhombic crystalline structure whose pattern was indexed. The pasting profile showed that this kind of starch has an end cold viscosity as a custard, making it useful for infantile formulations. It does not present dynamic viscosity and would not be a problem when swallowed. A very important finding in this work was that the orthorhombic nanocrystals, after solvation during gelatinization, do not contribute to the apparent viscosity development.

EVALUATING THE STRUCTURAL, MORPHOLOGICAL AND OPTICAL PROPERTIES OF PURE AND COBALT DOPED BISMUTH VANADATE NANOPOWDER BY CHEMICAL PRECIPITATION METHOD

Pure BiVO4, Cobalt doped BiVO4 nanoparticles prepared by Co-precipitation method and assessed for their structural, morphological and optical properties. The synthesized Pure BiVO4 and Co-BiVO4 nanoparticles were characterized by using XRD,FTIR, UV-DRS, SEM,EDS and Photoluminescence spectra (PL). XRD pattern shows the purity of prepared Pure BiVO4 and Co-BiVO4 nanoparticles size range of 5.6-22.3 nm and exhibit orthorhombic crystalline phase. Scanning Electron Microscopy (SEM) shows some clusters with tiny particles which revealed remarkable change in morphology of the prepared samples. The functional groups confirmation and chemical bonding confirmation was performed by FTIR and UV-DRS analysis. The estimated optical band gap to be 2.842 eV- 2.538 eV. The imperfection conditions were exposed from the Ultraviolet and visible emissions of the PL spectra.

Elpasolite structures based on A2AgBiX6 (A: MA, Cs, X: I, Br): Application in double perovskite solar cells

Organic-inorganic hybrid perovskites have emerged as high-performance semiconductors for optoelectronic applications in recent years. Nevertheless, their stability and toxicity issues demonstrate considerable challenges. Double perovskites have lately been introduced as a promising lead-free alternative, and the Cs 2 AgBiBr 6 composition has amazing potential to substitute current lead-containing absorbers due to its high stability and non-toxicity. Herein, Cs 2 AgBiBr 6 , MA 2 AgBiBr 6 , and MA 2 AgBiI 6 films are synthesized in a one-step solution base route and incorporated into a perovskite solar cell. Structural characterizations confirm the formation of single-phase cubic double perovskite structure for Cs 2 AgBiBr 6 and MA 2 AgBiBr 6 , and orthorhombic crystalline phase for MA 2 AgBiI 6 . The concentration of 0.5 M and annealing at 250 °C for 10 min for Cs 2 AgBiBr 6 or at 100 °C for 10 min for MA 2 AgBi(Br or I) 6 is the optimized parameter for successful deposition of these films. By examining the UV–Vis absorption and PL spectra, it is found that the Cs 2 AgBiBr 6 exhibits a direct bandgap of 2.16 eV, and MA 2 AgBiBr 6 and MA 2 AgBiI 6 feature indirect optical bandgaps of 2.00 and 1.64 eV, respectively. Also, the solar cells based on Cs 2 AgBiBr 6 , MA 2 AgBiBr 6 , and MA 2 AgBiI 6 absorbers show power conversion efficiencies (PCE) of about 1.16%, 0.20%, and 0.31%, respectively. Thus, the potential of double perovskite as an absorber material is demonstrated. This research reveals the new route for the emerging category of perovskites with considerable potential for optoelectronic applications. • Single-phase double perovskite structures of Cs 2 AgBiBr 6 , MA 2 AgBiBr 6 , and MA 2 AgBiI 6 successfully synthesized • 0.5 M concentration and annealing at 250 °C for Cs 2 AgBiBr 6 or 100 °C for MA 2 AgBi(Br or I) 6 are the optimized parameters for film deposition • Cs2AgBiBr6 exhibits direct bandgap of 2.16 eV, and MA 2 AgBi(Br or I) 6 feature indirect bandgaps of 2.00 or 1.64 eV, respectively • Cs 2 AgBiBr 6 , MA 2 AgBiBr 6 , and MA 2 AgBiI 6 show the PCE of 1.16, 0.2, 0.31%, respectively

Effect of atmospheric plasma treatment on the wettability of UHMWPE

Abstract The wettability of ultra-high molecular weight polyethylene surfaces was modified by atmospheric plasma treatment controlling exposure time and distance. The two-factor experimental design included treating samples for 0.5 and 1.5 s, placed at 2.0 and 4.0 cm from the plasma. The behavior of wettability was monitored for 90 days via the sessile drop method. Right after treatment, contact angle decreased from 85 to nearly 40 degrees. These changes coincided with an increase in the proportion of the orthorhombic crystalline phase and a reduction in the amorphous phase of the material. Later on, these structural changes were reversed. After 90 days of the plasma treatment, the contact angle was 66 and 73 degrees in samples located 2 and 4 cm away from the plasma, respectively. Although the plasma treatment increased the roughness of the polyethylene surface by 6 nm, it basically retained its mirror finish, except for a few blemishes here and there.

Synthesis of Sub-30 nm Lanthanide-Doped KLu₂F7 Nanorods with Multicolor Upconversion Luminescence.

Sub-30 nm lanthanide-doped KLu₂F7 upconversion (UC) nanorods were synthesized using a hightemperature coprecipitation method. Highly uniform morphologies, a small size distribution and the desirable orthorhombic crystalline phase was achieved by controlling the reaction temperature; while control over the UC luminescence color was achieved by changing the dopant activator. Orthorhombic KLu₂F7 nanorods showed excellent potential as a host phase for future UC luminescence materials in applications such as bioimaging.

Design and fabrication of NaFePO4/MWCNTs hybrid electrode material for sodium-ion battery

Watery rechargeable sodium-ion batteries are alluring as elective materials to replace conventional lithium-ion batteries for the improvement of next-generation devices due to the abundance of sodium assets. Hence, we report the NaFePO4/MWCNT hybrid nanocomposite for high-performance cathode material for sodium-ion batteries synthesized by a facile hydrothermal route. The structural and morphological information of the products was identified through XRD, Raman and FESEM studies. The results suggest that orthorhombic crystalline structure with Pnma space group and the disk-like NaFePO4 was consistently wrapped on the MWCNT. Furthermore, the NaFePO4 wrapped MWCNT hybrid anode electrode show superior surface area (78 m2/g) and pore size (12.74 nm) than bare NaFePO4 (78 m2/g; 43.44 nm). The electrochemical results divulge that the hybrid electrode showed outstanding stability and high specific capacitance. NaFePO4/MWCNT hybrid electrode reached discharge capacity of 90 mAhg−1 at corresponding current density of 0.1 C. Still it has maintain as 98% of retention after the 100th cycles test. The EIS further hold high electrochemical nature of the NaFePO4/MWCNT composite electrode than pristine NaFePO4.

Exploring the Different Degrees of Magnetic Disorder in TbxR1-xCu2 Nanoparticle Alloys.

Recently, potential technological interest has been revealed for the production of magnetocaloric alloys using Rare-Earth intermetallics. In this work, three series of TbRCu (R ≡ Gd, La, Y) alloys have been produced in bulk and nanoparticle sizes via arc melting and high energy ball milling. Rietveld refinements of the X-ray and Neutron diffraction patterns indicate that the crystalline structure in all alloys is consistent with TbCu orthorhombic bulk crystalline structure. The analyses of the DC-magnetisation () and AC-susceptibility () show that three distinct degrees of disorder have been achieved by the combination of both the Tb replacement (dilution) and the nanoscaling. These disordered states are characterised by transitions which are evident to , and specific heat. There exists an evolution from the most ordered Superantiferromagnetic arrangement of the TbLaCu NPs with Néel temperature, 27 K, and freezing temperature, 7 K, to the less ordered weakly interacting Superparamagnetism of the TbYCu nanoparticles ( absent, and T 3 K). The Super Spin Glass TbGdCu nanoparticles ( absent, and 20 K) are considered an intermediate disposition in between those two extremes, according to their enhanced random-bond contribution to frustration.

Temperature-controlled-release of essential oil via reusable mesoporous composite of microcrystalline cellulose and zeolitic imidazole frameworks

Essential oils are characterized by their potency as anti-pathogens and anti-oxidants. However, there is a limitation in the application due to uncontrollable release. Therefore, this approach is focused on designing mesoporous composite for temperature-controlled release of essential oils. Mesoporous composite namely zeolitic imidazole [email protected] cellulose ([email protected]), was successfully synthesized by the immediate growth of ZIF based on Zn and Co separately within MCC matrix. The estimated masses of ZIF within MCC were 263.4 – 296.3 g/kg. Orthorhombic dodecahedron crystalline ZIFs in micro size was massively covered MCC fibrils. Release of thyme and cumin as two essential oils, from mesoporous [email protected] composites was investigated at different temperatures. After 5 days, the release of essential oils were significantly slowed down to be 49.3 – 119.7 mg/g (18.5 – 44.9 %) for [email protected] composites compared to 248.0 – 265.7 mg/g (93.0 – 99.6 %) for MCC. Elevation of temperature was accompanied by slight faster release attributing to the ease liberation of essential oils by heating. Releasing mechanism of essential oils is mainly supposed due to combination between physical in principle as a solute diffusion and chemical processing’s in small relevant.