Morphology Of CeO2 Research Articles

The influence of CeO2 different morphologies effects on hydrodeoxygenation for guaiacol on Ni/CeO2 catalysts

Catalytic hydrodeoxygenation (HDO) is an effective way to produce high–value products from lignin-derived phenolic compounds. In this work, three different morphologies of Ni/CeO2 catalysts (amorphous, cubic, and rod-shaped) have been prepared through the conventional wet impregnation method. They can be used for the HDO of guaiacol to prepare cyclohexanol, an important chemical raw material. The influence of different morphologies of CeO2 on catalytic activity was explored. The research results indicate that Ni/CeO2–r catalysts with rod-shaped structures exhibit excellent catalytic properties. As a result, a 100 % conversion rate and 96.9 % cyclohexanol yield were achieved on the Ni/CeO2–r catalyst at 240 °C. The catalytic performance of the three catalysts follows this order: Ni/CeO2–r (rod-shaped) > Ni/CeO2–c (cubic) > Ni/CeO2–p (amorphous). The results of Raman and XPS indicate significant differences in the surface oxygen vacancy in catalysts with different morphologies. The Ni/CeO2–r catalyst has the highest oxygen vacancy concentration and defect. In addition, Ni/CeO2–r also has the largest specific surface area (SBET) and the highest nickel dispersion, and forms more Ni0 because of the strong interaction of Ni species and CeO2 support. Therefore, Ni/CeO2–r exhibits the most excellent catalytic performance for the hydrogenation of guaiacol than the other two catalysts. Moreover, the cycling activity test was also investigated over the Ni/CeO2–r catalyst. After five cycles, the conversion rate of guaiacol and the yield of cyclohexanol hardly decrease. This work provides vital ideas for the development of higher-activity, higher-stability, and low-cost catalysts for the conversion of lignin-derived phenolic compounds in the future.

Effect of CeO2 morphology and Ru impregnation method on CH4 selectivity reduction in polyethylene waste conversion to liquid fuels and lubricants

Hydrogenolysis of polyolefins offers a sustainable pathway by giving plastic waste a second life as valuable resources, transforming it into fuels and lubricants. Supported Ru catalysts have shown potential for depolymerizing polyolefins under mild conditions; however, depolymerization via terminal C-C bond cleavage can lead to the excessive formation of CH4. This study investigated the effects of CeO2 morphology and Ru impregnation method on the suppression of CH4 formation and increasing liquid and wax proportions (C5-C41) in the production of liquid fuels and lubricants through polyethylene hydrogenolysis. Controlling the morphology of CeO2 and impregnating Ru via electrostatic adsorption can enhance the formation of oxygen vacancies and strengthen the interaction between Ru and CeO2. The presence of defects in CeO2 also correlated with smaller particle size of Ru and a higher hydrogen reservoir site, which effectively suppress CH4 formation.

Magnetic, electrochemical properties and probable mechanism of charge storage in the pristine and Cr-doped CeO2

The emergence of cerium oxide (CeO2) has garnered significant interest as an energy storage gadget owing to its inspiring electrochemical, electrical and mechanical properties. Current work, we have synthesized Ce1-xCrxO2x=0,0.025,0.05,0.1 via simple auto-combustion method. The structure–property relations were characterized by several physicochemical characterizations such as XRD, FESEM, EDAX, vibrational spectroscopy, XPS, BET and UV–visible spectroscopy. The suds-like CeO2 morphology and oxygen defects were highly suitable for the electrolytic ion intercalation to the electrode. By employing the Trassati model, Power law establishment and Dunn’s model, the innate charge storage mechanisms in the synthesized materials were revealed. The specific capacitance of pristine CeO2 attained 30.42F/g and it enhances to 73.56F/g for Ce0.925Cr0.025O2 at 0.5 A/g. Further Ce0.925Cr0.025O2 possesses a capacitance retention of 108.85 % even after 1000 GCD cycles at a current density of 4 A/g. The electrochemical results suggest Ce1-xCrxO2x=0.025 as a good material for supercapacitor applications. The magnetic measurements on the doped and undoped samples show no long-range ordering indicating zero hysteresis loss. Further, magnetic studies suggests the suitability of Ce1-xCrxO2x=0.1 for supercapacitance applications.

Enhancing the ketonization efficiency of biomass through selective conversion of furanic compounds

Catalytic ketonization of biomass is an effective approach for the deoxygenation of bio-oil and the enrichment of high-purity ketone products. However, the bio-oil contains a large amount of furanic components with oxygenated side groups (e.g., furfural, furfuralcohol, etc.), which severely hinders the efficiency of the ketonization reaction. In response to this challenge, this study employed Pd-based catalysts for selective conversion of furfural into "keto-friendly" components, thereby mitigating their inhibitory effects. Initially, three morphologies of CeO2 (the main catalyst for ketonization) were selected to investigate their influence on furfural conversion. It was found that the products were mainly furfural (exceeding 86 %), with only up to approximately 13 % of "keto-friendly" products (mainly furans) detected, indicating that pure CeO2 exhibits a weak catalytic effect on the effective conversion of furfural. Compared with pure CeO2, the yield of "keto-friendly" products increased significantly when 1 wt% Pd was loaded, demonstrating the excellent catalytic performance of Pd in the effective conversion of furfural. Co-doping of Pd and Zr (5 wt%) on CeO2 further increased the "keto-friendly" products to 66 %, suggesting a synergistic effect of Pd and Zr. Mechanism analysis revealed that Pd promotes the formation of furans and benzenes by enhancing the decarbonylation of furfural and subsequent furan ring opening reactions, while the competing carbonyl hydrogenation pathway is weakened. The findings of this study will be beneficial for enhancing the biomass ketonization conversion, thereby providing valuable references for the high-value utilization of biomass.

Morphology effects of CeO2 on the performance of CaO-Cu/ CeO2 for integrated CO2 capture and conversion to CO

CeO2 support inhibits CaO sintering, and oxygen vacancy influences CO2 hydrogenation performance, making CeO2 widely applied in Integrated CO2 capture and in-situ conversion technology for reverse water–gas shift (ICCC-RWGS). Oxygen vacancy concentration was dependent on the morphology of CeO2, which would affect metal dispersion and CO2 hydrogenation conversion. However, Very little is known about the morphology effect of CeO2 on the carbon capture and in-situ hydrogenation performance of DFMs. Here, Cu/CeO2 with different CeO2 morphologies was synthesized, and high Cu dispersion was achieved on Cu/CeO2-R, exhibiting the best CO2 hydrogenation performance. Integrated Cu/CeO2 with CaO by physical mixing method, CaO-Cu/CeO2 was used to investigate the morphology effects of CeO2 on the performance of CaO-Cu/CeO2 for integrated CO2 capture and conversion to CO. CaO-Cu/CeO2-R exhibited the best capture-hydrogenation performance (CO2 conversion rate of 75 %, CO production rate of 9.72 mmol/g). The CeO2-R provided more surface oxygen vacancies, enhancing carbonate hydrogenation. The larger specific surface area and {110} crystal plane of CeO2-rod enhanced Cu dispersion, and the smaller particle size of CeO2-R enhanced its interaction with CaO, improving the cyclic stability of CaO-Cu/CeO2-R. The hydrogenation performance of CaO-Cu/CeO2 was dependent on the morphology of CeO2, providing insights into the design of high-activity metal catalytic components in ICCC-RWGS.

Effect of ceria morphology on hydrogen production via methane steam reforming for membrane reformer

AbstractHydrogen is a potential energy carrier in comparison to conventional fuels due to its high energy content. Methane is an attractive source for ‘on‐site’ production of hydrogen by using membrane reformer due to its low cost. However, such reformers are not well studied and high temperature operation of steam methane reforming (SMR) makes the integration with membrane separation difficult. Further, the main product of SMR is CO and H2 in which CO has an inhibition effect on the membrane separation process. Therefore, it is vital to synthesize a low temperature and low CO selective catalyst for a suitable integration with membrane reformer. Nickel‐based catalyst is widely used for SMR due to its low cost and high catalytic activity. CeO2 is a favoured support as it mobilizes the lattice oxygen and reduces the coke formation and CO selectivity. Though several studies are reported on CeO2 based support, the effect of CeO2 surface morphology is not studied for SMR. In the current work, Ni/CeO2 of different shapes (nanocube and nanorod) are synthesized. The complete characterization of the support was performed. The effect of support shape, calcination temperature, and reduction temperature on SMR activity is found at different operating temperatures. For each condition conversion, CO, CO2 selectivity, and hydrogen yield are calculated. The results show the CeO2 morphology has a considerable effect on conversion, CO selectivity, and hydrogen yield. It is found that ceria nanocube calcined at 550°C provides better performance at high temperature.

Synergistic performance of biomedical textiles incorporated with cerium oxide carbon nanocomposites for the antibacterial and sunlight-driven photocatalytic activity of self-cleaning

This work inspects the antibacterial activity and sunlight-driven photocatalytic activity effect of nanocomposites of CeO2 and carbon as a surface coating onto the fabric with self-cleaning properties. The nanocomposites of CeO2 and carbon were confirmed by XRD, FTIR, Laser Raman and TEM, revealing the amorphous nature of carbon and the crystallographic structure of CeO2 nanoparticles. TEM depicted a sheet-like structure of carbon and orbicular morphology of CeO2. The nanocomposite was impregnated onto fabrics using an immersion and ultrasonication method. The fabrics impregnated with nanocomposites exposed a clear zone of inhibition of E. Coli and S.aureus bacterial strains, indicating potent bactericidal properties. The nanocomposite-impregnated fabrics show efficient and strong photocatalytic activity against P-Rosaniline Hydrochloride (PRH) dye, which was investigated at different concentrations of dye, repeatability, and reusability with time. The notable photocatalytic activity of the fabrics underscores their potential for use in anti-infection applications.

Synthesis of a Flaky CeO2 with Nanocrystals Used for Polishing.

It is important to adapt the morphology of CeO2 to different applications. A novel flaky CeO2 with nanocrystals was successfully synthesized using the ordinal precipitation method and calcination. The size of the flaky CeO2 was about 10 μm, and the nanocrystals were about 100 nm. Under the action of the precipitant NH4HCO3, Ce3+ nucleated in large quantities. The nanosized crystals gathered into flakes driven by the surface energy. As the calcination temperature increased, the grains grew slowly by mass transfer due to the slow diffusion of reactants. By adding AlOOH to the starting material, the Al3+ doped into the CeO2 increased the content of Ce3+ in the CeO2, which improved the chemical activity of the CeO2. When the starting material's Al:Ce ratio was 5:1, the Ce3+ increased to 31.11% in the CeO2, which provided good application potential in the polishing field. After polishing by the slurry of flaky CeO2 for 1 h, the SiC surface roughness reduced from 464 nm to 11 nm.

Controlled Synthesis of Triangular Submicron-Sized CeO2 and Its Polishing Performance.

CeO2 is widely used in the field of chemical-mechanical polishing for integrated circuits. Morphology, particle size, crystallinity, and Ce3+ concentration are crucial factors that affect polishing performance. In this study, we successfully synthesized two novel triangular CeO2 abrasives with similar particle sizes (600 nm) but different morphologies and Ce3+ concentrations using a microwave-assisted hydrothermal method with high-concentration raw materials, and no surfactants or template agents were added. It is generally believed that CeO2 with a higher Ce3+ concentration leads to better polishing performance. However, the results of polishing indicate that CeO2 synthesized at 200 °C, despite its lower Ce3+ concentration, demonstrates outstanding polishing performance, achieving a polishing rate of 324 nm/min, and the Sa of Si wafers decreased by 3.6% after polishing. This suggests that, under similar particle size conditions, the morphology of CeO2 plays a dominant role in the mechanical effects during the polishing process. Additionally, compared to commercial polishing slurries, the synthesized samples demonstrated better polishing performance. This indicates that, in CMP, the pursuit of smaller spherical abrasives may not be necessary. Instead, the appropriate shape and particle size can better balance the material removal rate and surface roughness.

Fabrication of CeO2/CaO nanocomposite as ultraviolet screening agent and its application in sunscreen

In order to improve CeO2 ultraviolet absorption performance and transparency, this paper puts forward that different proportions of calcium oxide are doped during the formation of CeO2. Doping calcium ions with larger ion size and lower valence leads to the formation of oxygen defects by inhibiting the precipitation of oxygen from cerium oxide and keeps the fluorite structure of cerium oxide stable. The effects of CaO doping on the crystal structure, morphology, and optical characteristics of CeO2 were analyzed by XRD, SEM, TEM, TGA, XPS, UV–vis spectrophotometry. The pH of sunscreen, spread ability and some physical as well as chemical evaluations were carried out, while to study its UV protection performance the sunscreen SPF test was performed. The UV–vis results revealed that CeO2/20%CaO showed highly efficient UV absorption capacity. After adding calcium oxide, the catalytic activity of the material is reduced, due to which the generation of free radicals is demoted, and the harm to human body is decreased. After the addition of 3 wt% nanomaterials into sunscreen, the sun protection factor（SPF ）values of pure cerium oxide and CeO2/20%CaO are 1.95 and 2.81, and their sun protection coefficient is increased by 69.39%. Therefore, it is an ideal candidate as a component of ultraviolet screening agent in sunscreens and provides a new idea for the research direction of cerium oxide in anti-ultraviolet applications.

CeO2 NANOTANECİKLERİNİN SENTEZİ, KARAKTERİZASYONU VE FOTOKATALİTİK AKTİVİTESİ

The discharge of untreated wastewater from unplanned industrial activities using dyes can cause serious environmental pollution and affect the aquatic environment. Semiconductor photocatalysis is a favorable technology widely used for degrading organic dyes in wastewater. This study dealt with the preparation of CeO2 nanoparticles via a simple precipitation technique. Information on the structural and morphological features of the developed CeO2 nanoparticles were determined using Fourier transform infrared with attenuated total reflectance (FTIR-ATR), Raman spectroscopy, X-ray diffraction (XRD), and scanning electron microscopy (SEM) spectroscopic methods. The presence of the characteristic bands of CeO2 in the FTIR spectrum provided evidence of successful CeO2 formation. The calculated crystallite particle size utilizing the Scherrer equation was 10 nm. SEM images revealed that the morphology of CeO2 consisted of almost spherical particles with slight agglomeration. Brunauer-Emmett-Teller (BET) technique was also used to find out the specific surface area of CeO2 nanoparticles (11 m2/g). The efficiency of CeO2 nanoparticles was also confirmed in terms of their photocatalytic activity against Rhodamine B (Rh B) under UV-A light. The results indicated that CeO2 nanoparticles could be a promising catalyst candidate for industrial wastewater treatment.

Investigation into the impact of CeO2 morphology regulation on the oxidation process of dichloromethane.

Four distinct CeO2 catalysts featuring varied morphologies (nanorods, nanocubes, nanoparticles, and nano spindle-shaped) were synthesized through a hydrothermal process and subsequently employed in the oxidation of dichloromethane (DCM). The findings revealed that the nano spindle-shaped CeO2 exhibited exposure of crystal faces (111), demonstrating superior catalytic oxidation performance for DCM with a T90 of 337 °C and notably excellent low-temperature catalytic activity (T50 = 192 °C). The primary reaction products were identified as HCl and CO2. Through obvious characterizations, it showed that the excellent catalytic activity presented by CeO2-s catalyst might be related to the higher oxygen vacancy concentration, surface active oxygen content, and superior redox performance caused by specific exposed crystal planes. Meanwhile, CeO2-s catalyst owned outstanding stability, reusability, and water inactivation regeneration, which had tremendous potential in practical treatment.

Synthesis of heterostructured ZnO-CeO2 nanocomposite for supercapacitor applications

Supercapacitors (SCs) are receiving increasing attention owing to their unique characteristics, including moderate energy density, long service life, rapid discharge–charge rates, and exceptional safety. In this study, a ZnO-CeO2 nanocomposite was synthesized via a facile hydrothermal method. The hexagonal nanorods of ZnO and the particle morphology of CeO2 with high purity and crystallinity were confirmed using morphological and phase analyses. The cyclic voltammetry (CV) voltammogram from prolonged scan rates and the maximum response current in the three-electrode cell demonstrates the ZnO-CeO2 nanocomposite ideal capacitive behavior. The ZnO-CeO2 nanocomposite exhibited excellent electrochemical properties owing to the typical pseudocapacitive nature of fast redox reactions from Ce3+/Ce4+ and Zn2+ ions, with an initial capacitive contribution of 80 % at 10 mV s−1, calculated using the Dunn’s method. It exhibited a high capacitance of 1040.9 F/g at a current density of 1 A/g and excellent long-term cycling stability (97.0 %) and rate capability (68.1 %) over 8000 charge–discharge cycles. Density functional theory (DFT) calculations indicated that the ZnO-CeO2 composites show superior transport properties owing to the heterointerfaces of the formed heterostructure. The promising results of this study indicate that the ZnO-CeO2 nanocomposite could be used as an electrode material for supercapacitors.

Nanostructured CeO2 as support of Ni-catalysts for plasma-catalytic CO2 methanation: Tailoring support’s nanomorphology towards improved performance

Plasma-assisted CO2 methanation has been recently presented as a highly promising route towards the electrification of power-to-gas processes, a key step in our transition to sustainable energy generation. Interesting results have been obtained via the combination of cold plasmas – such as Dielectric Barrier Discharge – and Ni-catalysts prepared using CeO2-containing oxides as support, well known for they ability towards oxygen exchange. In the present work, the physicochemical and dielectric properties of Ni/CeO2 catalysts were tailored through the modification of the nanostructured morphology of pure CeO2, as an alternative to the use of dopants/promoters. Improved efficiency was observed in the presence of CeO2 nanoneedles and nanorods exposing 〈011〉 facets, more prompt to oxygen exchange. The lower dielectric permittivity of these materials led to a more efficient management of adsorbed species during on-plasma operation, resulting in improved plasma-catalytic behavior.

Preformed Pt Nanoparticles Supported on Nanoshaped CeO2 for Total Propane Oxidation.

Pt-based catalysts have been widely used for the removal of short-chain volatile organic compounds (VOCs), such as propane. In this study, we synthesized Pt nanoparticles with a size of ca. 2.4 nm and loaded them on various fine-shaped CeO2 with different facets to investigate the effect of CeO2 morphology on the complete oxidation of propane. The Pt/CeO2-o catalyst with {111} facets exhibited superior catalytic activity compared to the Pt/CeO2-r catalyst with {110} and {100} facets. Specifically, the turnover frequency (TOF) value of Pt/CeO2-o was 1.8 times higher than that of Pt/CeO2-r. Moreover, Pt/CeO2-o showed outstanding long-term stability during 50 h. X-ray photoelectron spectroscopy (XPS) and diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) revealed that the excellent performance of Pt/CeO2-o is due to the prevalence of metallic Pt species, which promotes C-C bond cleavage and facilitates the rapid removal of surface formate species. In contrast, a stronger metal-support interaction in Pt/CeO2-r leads to easier oxidation of Pt species and the accumulation of intermediates, which is detrimental to the catalytic activity. Our work provides insight into the oxidation of propane on different nanoshaped Pt/CeO2 catalysts.

Mo-modified Pt/CeO2 nanorods with high propane catalytic combustion activity: Comparison of phosphoric, sulphuric and molybdic acid modifications

Catalytic combustion is the most commonly used reaction to purify VOCs. The activation and dissociation of the CH bond over the catalyst becomes a key factor in controlling the rate of the reaction. To identify the factors promoting CH bond decomposition and the roles played by the acidity of the catalyst in propane catalytic combustion, molybdic acid, phosphoric acid, and sulfuric acid were used to acidify CeO2 nanorods, and Pt was then loaded onto the nanorods. The Mo acid modified Pt/CeO2 catalyst purified more than 90% of propane at a high space velocity of 150,000 mL/(g·h) and 300 °C, which is a significant improvement over the Pt/CeO2 catalyst. XRD patterns and TEM images showed that the crystal structure and morphology of CeO2 were not damaged by acid modification. XPS, in situ CO-DRIFTs, NH3-TPD, H2-TPR and other characterization methods were used on Mo acid modified catalysts to explore the reasons for the improved catalytic performance. The results showed that Pt2+ and Pt4+ coexist on 1% Pt/CeO2-18Mo catalyst, and there are more acidic sites, redox sites and adsorbed oxygen. The reaction order test showed the reaction order of molybdic acid modified catalyst to oxygen is -0.4, which is higher than other catalysts, meaning that oxygen is difficult to inhibit the reaction on the catalyst surface. Finally, in situ DRIFTs proved that 1% Pt/CeO2-18Mo catalyst had strong propane adsorption and activation capacity. This catalyst provides new insight into how VOCs can be eliminated more efficiently, green and economically.

Effect of oxygen vacancy influenced by CeO2 morphology on the methanol catalytic reforming for hydrogen production

Methanol reforming has been a popular pathway to produce hydrogen due to the high hydrogen storage density of methanol. CeO2 as the support is widely used for catalytic methanol reforming, but the effect of CeO2 morphology on the reaction mechanism has not been revealed out. In this study, the catalytic performances of Ru/CeO2 with different CeO2 morphology, including rod, cubic and their mixed, were investigated in methanol reforming for the production of hydrogen. By regulating the temperature during hydrothermal preparation, different CeO2 supports can be achieved. Results showed that Ru/CeO2 catalyst with rod CeO2 (Ru/r-CeO2) exhibited a much better catalytic performance than the cubic catalyst (Ru/c-CeO2) and the mixed catalyst (Ru/m-CeO2), with a higher yield of hydrogen and a lower selectivity of CO product. This was mainly due to the large surface area that favored the dispersion of Ru metal site and the interaction between Ru and CeO2 support that improved the electron transfer to benefit the formation of oxygen vacancy. Therefore, the Ru/r-CeO2 catalyst possessed abundant oxygen vacancy, which enabled to adsorb the methanol efficiently and trigger the methanol reforming reaction. It also can enhance the adsorption of CO and water and promote the water-gas-shift reaction to increase the yield of hydrogen production.

Hydrothermal aging mechanism of K/CeO2 catalyst in soot catalytic combustion based on the Ostwald ripening mechanism

The thermogravimetric analysis (TGA) experiment of CeO2 and K/CeO2 catalysts prepared with the incipient wetness impregnation method was carried out for the soot catalytic combustion at different K loadings before and after hydrothermal aging. The structure, morphology, and catalytic activity of CeO2 and K/CeO2 catalysts were thoroughly investigated with the means of N2 adsorption/desorption, XRD, XPS, and H2-TPR. The density functional theory (DFT) operation was applied to explain the mechanism of the decrease in catalytic activity of CeO2 and K/CeO2 catalysts after hydrothermal aging. TGA showed that the Tmax of the hydrothermal aging K/CeO2 catalyst was 505 °C, which was higher than CeO2 at 473 °C. After hydrothermal aging, CeO2 catalysts were less agglomerated than K/CeO2, and the ratio of Ce3+/Ce4+ decreases, but the mobile oxygen OII/OI ratio in the lattice were increased compared to CeO2 catalysts. DFT calculations showed that K doping significantly increases the surface energy and decreases the oxygen vacancy formation energy of (1 1 1), (2 0 0), (2 2 0), and (3 1 1) crystal planes, leading to enhanced catalytic combustion performance of the K/CeO2 catalyst soot based on the Mars-Van Krevelen mechanism. Furthermore, K doping decreased the adsorption energy of H2O and the energy barrier of K atoms diffusing near the surface of K/CeO2 catalyst crystals from 5.92 eV to 2.46 eV, which resulted in the loss of the active center number because of migration and coalescence (sintering) caused by crystal plane instability based on the Ostwald ripening mechanism.

Sn-decorated CeO2 with different morphologies for direct dehydrogenation of ethylbenzene

Three Sn-decorated ceria catalysts with various morphologies (rods, particles, and cubes) were prepared and applied to the direct dehydrogenation of ethylbenzene. Multi-technology characterizations, including X-ray photoelectron spectroscopy (XPS), H2-temperature programmed reduction (H2-TPR), and Raman spectroscopy, prove that the oxygen vacancies are the active sites for ethylbenzene dehydrogenation, which can be regulated by engineering CeO2 morphology and enhanced via introducing metal Sn. Given the results of activity test, the catalytic activities for ethylbenzene dehydrogenation over different samples are closely dependent on the amount of oxygen vacancies. The reduced Sn-decorated CeO2 catalyst with nanoparticles morphology exhibits better dehydrogenation performance than the other two studied catalysts at 600 °C. This work provides an effective approach to regulate the active oxygen vacancies and further enhance the dehydrogenation activities through engineering the surface morphology of the catalyst and introducing suitable additives.

Photocatalytic activity and mechanism of cerium dioxide with different morphologies for tetracycline degradation

Cerium dioxide (CeO2) semiconductor has received wide attention in the field of energy and environment due to its excellent oxygen storage capacity and abundant oxygen vacancies (OVs). Previous research demonstrated that the morphology and structure of the crystal had great influence on the physicochemical properties of the material. Herein, CeO2 nanomaterials with different morphologies were prepared via a facile hydrothermal and template method. Systematic material characterizations suggested that the synthetic CeO2 has different morphologies with CeO2 nanorods (NRs), nanocubes (NCs), nanosheets (NSs), hollow spheres (HSs), and mesoporous CeO2 (m-CeO2), respectively. The visible-light-induced degradation performance of CeO2 with different morphologies was investigated in aqueous solution using the antibiotic tetracycline (TC) as a model pollutant. The experimental results exhibited that the CeO2NRs possessed the best adsorption capacity and photocatalytic activity and more than 89.35% TC could be removed within 90 min. Combined with the XPS characterization results implied that the concentrations of Ce3+ and OVs on the surface of CeO2 with different morphologies were discrepancy, and the improved photocatalytic performance of CeO2NRs was mainly due to the higher concentration of Ce3+ and OVs on the catalyst surface. These results confirmed that the regulation of the morphology of CeO2 could effectively enhance its photocatalytic activity. Furthermore, the results of active species trapping experiments proved that the super oxide anion (•O2-) radical and hole (h+) played dominant roles in the degradation of TC.