SCIENCE OF THE TOTAL ENVIRONMENT
·
2018
·
IF 4.61
Bingjie Zhang,Jiawen Ji,Xue Liu,Changsheng Li,Meng Yuan,Jingyang Yu,Yongqiang Ma
In this study, nano zirconium carbide (n-ZrC) was synthesized by preceramic polymers method, and it was used to adsorb emodin and physcion from solutions for the first time. The prepared material was characterized by various technologies . The adsorption experiment was carried out to investigate the emodin and physcion removal performance. The results indicate that the pseudo-second-order kinetic model and the Langmuir model correlated satisfactorily to the experimental data, and the thermodynamic parameters are also calculated. Especially, n-ZrC can remove >95% of emodin or physcion in a minute under the optimal conditions, it is the fastest adsorption rate compared to other commonly used adsorbents (commercial zirconium carbide, activated carbon, C18, PSA, GCB and florisil). The adsorption mechanism was discussed, which suggests that Van der Waals' forces are the primary driving power during the adsorption process. Moreover, n-ZrC is stable at different pH and it can be reused at least fifteen times.
研究领域:
环境科学
·
材料科学
·
药物化学
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2019
·
IF 8.456
Xiao-Dong Jian,Biao Lu,Dan-Dan Li,Ying-Bang Yao,Tao Tao,Bo Liang,Xiong-Wei Lin,Jin-Hong Guo,Yi-Jiang Zeng,Sheng-Guo Lu
Barium strontium zirconate titanate ceramics ((BaSr)(ZrTi)O3-BSZT) with Zr4+ ionic contents of 15 and 20 mol % and Sr2+ ionic contents of 15, 20, 25, and 30 mol % were prepared using a solid-state reaction approach. X-ray diffraction and scanning electron microscopy were used to characterize the lattice structure and morphologies of the ceramics. Permittivity and polarization as a function of temperature were characterized using an impedance analyzer and a Tower–Sawyer circuit. The electrocaloric effect was measured directly and calculated using the Maxwell relation (indirectly). The results indicated that the BSZT ceramics change from a normal ferroelectric to a relaxor ferroelectric with increasing Zr4+ ionic content, which can be further modified by the addition of Sr2+ ionic content. The optimized adiabatic temperature change ΔT obtained is 2.43 K in (Ba0.85Sr0.15)(Zr0.15Ti0.75)O3 ceramics, and ΔT >1.6 K over a wide temperature span of 120 °C was obtained.
研究领域:
材料科学
·
物理学
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF POROUS MATERIALS
·
2024
·
IF 2.5
Shi Xiang,Wang Ke,Wang Minxin,Yuan Hong
UiO-66 specimens having different acetic acid/ZrCl 4 molar ratios were prepared and pyrolyzed to ZrO 2 as supports for Pt and Ni, intended to catalyze the decarboxylation of oleic acid. Brunauer-Emmett-Teller surface area analyses, NH 3 temperature-programmed desorption and pyridine adsorption infrared spectroscopy showed that the material made using an acetic acid/ZrCl 4 molar ratio of 100 (ZrO 2 -100) had the largest specific surface area, acid amount and acid strength values. The yield of C 8 -C 17 alkanes obtained from Ni/ZrO 2 -100 exceeded that provided by Pt/ZrO 2 -100 because the latter possessed more acidic sites than the former, which excessively cracked long-chain hydrocarbons. The 1 wt% Ni/ZrO 2 -100 catalyst showed the best catalytic performance, with 96.4% conversion of oleic acid and an 80.6% yield of C 8 -C 17 alkanes after 4 h at 340 °C under a CO 2 atmosphere at a pressure of 18 bar. The conversion of oleic acid remained almost unchanged after 4 reuses of this catalyst whereas the yield of C 8 -C 17 alkanes decreased to 66.7%. This result is attributed to a loss of acidic sites and an increase in carbon build-up.
研究领域:
化学工程
·
催化科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Huiyuan Zhang,Tianhong Dong,Cancan Zheng,Hongxing Zhang,Wenchao Zhu,Hailing Xi,Yong He
Strippable films are extensively utilised for the decontamination of radioactive surfaces because of their cost-effectiveness, ease of operation, and minimal liquid waste. However, traditional strippable detergents are formulated for use at normal ambient temperatures and typically lose their efficacy at low temperatures because of poor performance or excessively long film-forming time. In this study, we have developed an anti-freezing and sprayable AMZW detergent based on acrylic acid (AA), acrylamide (AM), zirconyl chloride octahydrate (ZrOCl 2 ·8H 2 O), and water (H 2 O), which possesses a freezing point of approximately −34 ℃ due to the solvation interaction between Zr 4+ and H 2 O. Even at temperatures as low as −25 ℃, the AMZW detergent can be easily sprayed using a conventional apparatus and rapidly cured into a strippable hydrogel film under irradiation by 365 nm UV LED light (LED@365 nm), household LED panel light, or sunlight. The coordination bond formed between Zr 4+ and the carboxyl group of the polymer chain imparts excellent mechanical properties to the hydrogel while the carboxyl group can complex with uranyl nitrate hexahydrate (UO 2 (NO 3 ) 2 ·6H 2 O)—a radioactive simulant. As a result, the strippable hydrogel film demonstrates high tensile strength (6.1 ∼ 19.3 MPa), excellent flexibility (elongation of 90 ∼ 855 %), moderate peel strength (0.05 ∼ 3 N/cm, room temperature (RT)), and high decontamination efficiency (>91.6 % on stainless steel and glass; >81.3 % on concrete) over a wide range of temperatures (−25 ∼ 25 ℃). This work presents a novel approach for producing anti-freezing, fast-forming, flexible, and high-strength strippable hydrogel films for surface radioactive decontamination at low temperatures.
研究领域:
材料科学
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环境科学
·
核工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF RARE EARTHS
·
2025
·
IF 7.2
Zhonghao Zhang,Xinsheng Li,Sirun Qin,Xiwen Liao,Xiangxi Huang,Duoqiang Liang
A novel method for selective adsorption of zirconium (Zr) from scandium (Sc) in HNO 3 solution was proposed by DPO/SBA-15-N adsorbent which was prepared with SBA-15 and diphosphoryl (DPO) groups through silane coupling method. The results of scanning electron microscopy-energy dispersive spectrometer (SEM-EDS), Brunauer-Emmet-Teller (BET), thermogravimetry (TG) analysis and digestion analysis indicate that DPO/SBA-15-N is an ordered mesoporous adsorbent with a large specific surface area (157.363 m 2 /g) and high functional group content (1.16 mmol/g). In adsorption experiments, DPO/SBA-15-N exhibits high adsorption capacity ( Q = 130.23 mg/g), high separation factor (SF Zr/Sc = 6402) and high adsorption speed (reaching equilibrium within 10 min) for Zr(Ⅳ) in 6 mol/L HNO 3 medium, and the adsorption is better consistent with pseudo-second-order model and Langmuir model. According to the analysis of Fourier transform infrared spectroscopy (FT-IR) and X-ray photoelectron spectroscopy (XPS) results, the P‒O and P=O groups in diphosphoryl (DPO) groups play an important role in the selective adsorption process. In conclusion, the adsorbent prepared in this work has great potential for the selective adsorption of Zr(Ⅳ) from Sc(Ⅲ).
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Yao Zhang,Guizhen Li,Xu Wang,Mingrong Lu,Jiaxiong Li,Xiuying Fang,Wenrong Yang,Min Yang,Hongbin Wang
The development of effective methods for identifying and eliminating antibiotics from wastewater is urgently needed, and it continues to pose significant challenges. In this study, a zirconium-based metal–organic framework (UiO-66) was synthesized using a straightforward one-pot method for the dual purpose of detecting and adsorbing tetracycline (TC). Characterization by transmission electron microscopy (TEM), X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FT-IR), X-ray photoelectron spectroscopy (XPS), and Brunauer-Emmett-Teller (BET) analysis demonstrated that UiO-66 exhibited abundant surface functional groups and an exceptionally high specific surface area, resulting in a high TC removal efficiency of 85.14 % (initial concentration: 20 mg/L) over a wide pH range. The adsorption data were accurately described by the pseudo-second-order kinetic and Freundlich isotherm models. Notably, the UiO-66 material adsorbed with TC could be well regenerated at least two cycles, showing no significant loss in adsorption efficiency. Furthermore, the adsorbent demonstrated blue emission when excited at 310 nm. As the concentration of TC increased, a corresponding decrease in the fluorescence intensity of UiO-66 was observed. This change exhibited a linear correlation within the concentration range of 0.01 to 30 mg/L, achieving a detection limit as low as 0.003 mg/L. The UiO-66 probe exhibited exceptional specificity for TC and strong anti-interference capability, achieving satisfactory recoveries in the analysis of TC from real samples. These findings are poised to assist researchers in creating comprehensive strategies for the concurrent detection and elimination of antibiotics in the environment.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Materials
·
2025
·Vol. 18
·期 9
·1980
·
IF 3.2
Haoxuan Xu,Bo Deng,Xinan Zhang
Solution-processed metal oxide dielectrics often result in unstable thin-film transistor (TFT) performance, hindering the development of next-generation metal oxide electronics. In this study, we prepared fluorine (F)-doped zirconium oxide (ZrO2) dielectric layers using a chemical solution method to construct TFTs. The characterization by X-ray photoelectron spectroscopy (XPS) revealed that appropriate fluoride doping significantly reduces oxygen vacancies and the concentration of hydroxyl groups, thereby suppressing polarization processes. Subsequently, the electrical properties of Al/F:ZrO2/n++Si capacitors were evaluated, demonstrating that the optimized 10% F:ZrO2dielectric exhibits a low leakage current density and stable capacitance across a wide frequency range. Indium zinc oxide (IZO) TFTs incorporating 10% F:ZrO2dielectric layers were then fabricated. These devices displayed reliable electrical characteristics, including high mobility over a broad frequency range, reduced dual-sweep hysteresis, and excellent stability under positive-bias stress (PBS) after three months of aging. These findings indicate that the use of the fluorine-doped ZrO2dielectric is a versatile strategy for achieving high-performance metal oxide thin-film electronics.
研究领域:
材料科学
·
电子工程
✓ 已验证
DOI
PubMed
高影响因子
Nature Communications
·
2025
·Vol. 16
·期 1
·1-13
·
IF 15.7
Liu Shaojia,Deng Jingjing,Zhao Hewei,Wang Tianbai,Lu Junfeng,Ding Baosen,Guo Tianqi,Ritchie Robert O.,Guo Lin
Stiffness-damping balance, high specific mechanical performance, and corrosion resistance are demanded for metals. Here, we developed an enamel-inspired ceramic (EIC) coating strategy involving hydrothermal growth of a tooth enamel-like ZrO₂ nanorods on Zr foil and amorphous ZrO₂ intergranular phase formation via controlled hydrolysis. The EIC coated Zr foil (Zr-EIC) achieved a high viscoelastic figure of merit (4.6 GPa); as well as excellent specific stiffness and hardness owing to the lightweight of ceramics, surpassing the values of Zr and previously reported Zr-based alloys or Zr-based composites. This was due to the vertically oriented stiff nanorods and unique energy dissipation derived from deformation at the crystalline/amorphous interfaces. It demonstrated exceptional NaCl corrosion resistance. This approach showed universality across Ti, Zn, and Cu substrates, enhancing both mechanical properties and corrosion resistance. By constructing an enamel-like hierarchical structure on the metal surface, the strategy overcomes traditional metal limitations without causing an increase in density.
研究领域:
材料科学
·
表面工程
·
纳米技术
·
金属学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Corrosion Communications
·
2023
·
IF 0
Xiaoping Lai,Jie Wang,Xin Wang,Kuo Jiang,Weizhi Tian,Baowen Xu
YSZ:Eu powder was prepared by sol spray pyrolysis method. Thermal barrier coatings (TBCs) composed of Eu 3+ -doped pure tetragonal yttrium-stabilized zirconia (namely, YSZ:Eu) were fabricated by air-plasma spraying technique. Crystal structure and fluorescence intensity of YSZ:Eu coating were investigated after aging at 1200 °C for 5 − 100 h. X-ray diffraction (XRD) indicates that tetragonal phase in YSZ:Eu coating had high resistance to degradation over a wide range of time periods and temperatures. Luminescence results indicate that asymmetry ratios of the fluorescence emission spectra were stable in a range of 1.2 ± 0.2. Relationships between phase structure and lattice distortion were further studied by fluorescence spectroscopy measurement using I 606 / I 590 intensity ratio. The fluorescence results were consistent with those drawn by XRD, where the high stability of YSZ:Eu coating was confirmed. Excellent thermal stability, in terms of both the phase structure and luminescence intensity, of YSZ:Eu coating indicates that the present preparation method is suitable for phosphor powder applications.
研究领域:
材料科学
·
无机化学
·
光学
✓ 已验证
DOI
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2023
·Vol. 106
·期 11
·7009-7018
·
IF 3.9
Yong Ge,Baoliang Xu,Yiliao Liao,Xueyu Zhang,Xu Yan,Caohui Zheng,Tao Duan
Multiphase ceramics have a high application potential in the field of nuclear waste immobilization because of the efficient synergy between the individual phases. In this work, zirconia/garnet multiphase ceramics with high efficient and effective immobilization capacity of trivalent actinides were successfully prepared using conventional solid-phase sintering. ZrO 2 doping increases the lattice site available for nuclide substitution and advance the immobilization capacity of the ceramic substrate for nuclide. At the same time, the phase change of zirconia is used to tougher and improve the physical properties of the ceramic waste form. The feasibility of using multiphase ceramics for the efficient immobilization of trivalent actinides was assessed by studying the phase evolution, microstructure, Vickers hardness, and chemical stability of the multi-phase ceramics. Zr 1- x Nd x O 2- x /2 /Ca 3- y Nd y Zr 3- y Fe y -1 Fe 3 O 12 multiphase ceramics exhibited superior physical or chemical properties compared to most of the multiphase ceramics as well as the previously prepared single-phase calcium garnet ceramic waste forms. The Vickers hardness of all the multiphase ceramic samples ranged between 685 and 730 HV0.5. Under the condition of using simulate Bei Shan groundwater as leaching agent, the normalized leaching rates of Nd is approximately 10 − 6 g · m −2 · day −1 , showing good chemical stability and achieving efficient and effective immobilization of trivalent actinides. The excellent chemical, as well as physical properties of Zr 1- x Nd x O 2- x /2 /Ca 3- y Nd y Zr 3- y Fe y -1 Fe 3 O 12 multiphase ceramics are expected to make them one of the substrates for more efficient and effective immobilizing of trivalent actinides.
研究领域:
材料科学
·
核废料管理
✓ 已验证
DOI
高影响因子
Pigment & Resin Technology
·
2023
·Vol. 53
·期 5
·638-649
·
IF 1.4
Shan Peng,Ranran Yang,Binglong Lei,Yun Gao,Renhua Chen,Xiaohong Xia,Kevin P. Homewood
PurposeThis paper aims to systematically demonstrate a methodology to determine the relative and absolute encapsulation efficiencies (αReandαAb) for thermally- and chemically-robust inorganic pigments, typically like ZrSiO4-based pigments, thereby enhancing their coloring performance.Design/methodology/approachThe authors designed a route, surplus alkali-decomposition and subsequently strong-acid dissolution (SAD2) to completely decompose three classic zircon pigments (Pr–ZrSiO4, Fe2O3@ZrSiO4and CdS@ZrSiO4) into clear solutions and preferably used inductively coupled plasma-optical emission spectrometry (ICP-OES) to determine the concentrations of host elements and chromophores, thereby deriving the numeric data and interrelation ofαReandαAb.FindingsZircon pigments can be thoroughly decomposed into some dissoluble zirconate–silicate resultants by SAD2 at a ratio of the fluxing agent to pigment over 6. ICP-OES is proved more suitable than some other quantification techniques in deriving the compositional concentrations, thereby the values ofαReandαAb, and their transformation coefficientKRA, which maintains stably within 0.8–0.9 in Fe2O3@ZrSiO4and CdS@ZrSiO4and is slightly reduced to 0.67–0.85 in Pr–ZrSiO4.Practical implicationsThe SAD2 method and encapsulation efficiencies are well applicable for both zircon pigments and the other pigmental or non-pigmental inhomogeneous systems in characterizing their accurate composition.Originality/valueThe authors herein first proposed strict definitions for the relative and absolute encapsulation efficiencies for inorganic pigments, developed a relatively stringent methodology to determine their accurate values and interrelation.
研究领域:
材料科学
·
分析化学
✓ 已验证
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2022
·
IF 7.968
Caiyun Han,Jing Xie,Xize Min
Due to the non-degradable of heavy metal, adsorption has been extensively applied to abatement it. Most studies were focused on uptake metal ions via electrostatic attraction and ion exchange, and load molecule H 3 AsO 4 from strongly acidic wastewater was still challenging. To solve the problem, bimetallic La–Zr MOFs was facilely fabricated in this work, and the fcu topology structure of La-Zr MOFs was remained well under the investigate crystallization time and crystallization temperature. However, the crystallinity of the obtained La-Zr MOFs was influenced by the synthesized factors. The obtained La–Zr MOFs was employed as adsorbent to removal Cr(VI) and As(V), and the performance was evaluated by the batch experiment. The result indicated that the adsorption performance of Cr(VI) and As(V) was positively correlated with the crystallinity , and the optimal sample was 1LaUN 12 . From the XPS characterization, it was found that H 3 AsO 4 was successfully uptake over 1LaUN 12 surface, and the maximum monolayer adsorption capacity was 83.40 mgH 3 AsO 4 /g via ligand exchange and coordination reactions with La−OH and Zr−OH. In addition, the sample 1LaUN 12 also exhibited the excellent Cr(VI) load performance, and the maximum monolayer adsorption capacity of Cr(VI) was 222.5 mg/g. Above 40% Cr(VI) was reduced to Cr(III) by amino groups, and immobilized over the surface of 1LaUN 12 . Eventually, 1LaUN 12 displayed a good structural stability in the acidic medium, which was in favor of removing Cr(VI) and As(V) efficiently from strongly acidic solutions.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）