INORGANIC CHEMISTRY
·
2024
·
IF 4.3
Mei Yan,Ru-Ling Tang,Wei Xu,Wenlong Liu,Sheng-Ping Guo
Zirconium/hafnium fluorides have recently been recognized as potential nonlinear optical (NLO) materials with short ultraviolet (UV) cutoff edges, which is significant in laser science and industry. The synthesis of noncentrosymmetric (NCS) materials based on centrosymmetric (CS) compounds by an isovalent cation substitution-oriented design is an emerging strategy in the NLO territory. Here, two isostructural and novel fluorides, CaBaMF8 (M = Zr (1), Hf (2)), have been synthesized through the combination of alkaline earth metals, zirconium/hafnium, and fluorine elements. They feature zero-dimensional and CS structures composed by an isolated MF8 (M = Zr, Hf) dodecahedron and dissociative Ca2+ and Ba2+ cations, and they display short UV cutoff edges (<200 nm) as well. Two three-dimensional fluorides Li2CaMF8 (M = Zr (3), Hf (4)) are obtained by replacing Ba with alkali metal Li atom, which not only represent phase-matchable second-harmonic-generation activities (0.36, 0.30× KH2PO4 (KDP)) at 1064 nm but also maintain short UV cutoff edges with high reflectance. This work has largely enriched the family of NCS zirconium/hafnium fluorides reaching the short UV region.
✓ 已验证
DOI
高影响因子
ELECTROANALYSIS
·
2021
·Vol. 34
·期 4
·701-708
·
IF 3.223
Jing Chen,Shuying Li,Fanghong Xu,Qian Zhang
Widely presented nitrite in drinking water, food and even physiological system endangers human health. Here,bare gold nanoparticles functionalized Zr-based metal-organic framework modified reduced graphene oxide (GNPs/UiO-66-NH 2 /rGO) nanocomposites were prepared by hydrothermal method. This experiment studies the morphology, composition, structure and electrochemical behavior of the sensor. The experimental results show that the sensor has a peak potential of 0.9 V, the concentration range of NO 2 − is 5.0 μM to 768 μM, the linear regression equation of the calibration curve is I pa =0.3646+0.00642 C (R 2 =0.9998), and the LOD is as low as 3.7 μM (S/N=3). Therefore, an electrochemical sensor platform for trace detection of NO 2 − was successfully constructed.
✓ 已验证
DOI
高影响因子
DALTON TRANSACTIONS
·
2017
·Vol. 46
·期 23
·7412-7420
·
IF 4.029
Zhe Wang,Ying Huang,Jian Yang,Yongsheng Li,Qixin Zhuang,Jinlou Gu
The primary pollutant, radioactive iodine (I2), has become a worldwide concern due to its serious ill effects of radiotoxicity on human health. Therefore, it is of great significance to develop novel adsorbents for effectively eliminating I2 from nuclear waste. Herein, we reported a Zr-based MOF adsorbent constructed by utilizing pyridine-containing pyridine-dicarboxylic acid (PYDC) as organic ligands (UiO-66-PYDC) as well as active sites for the efficient removal of I2. UiO-66-PYDC MOFs were synthesized by a hydrothermal strategy and featured good chemical and thermal stabilities, endowing them with the ability to work in harsh environments. The abundant and inherent pyridine moieties in the developed adsorbent worked as active adsorption sites to capture I2. The correlation between the most significant parameters such as the contact time, adsorbate concentration, and reusability was optimized, and the interaction mechanism between I2 and UiO-66-PYDC was investigated in detail. As for the current adsorbent, a pseudo-second order rate equation was used to explain the removal kinetics, and the Langmuir model exhibited a better fit to the adsorption isotherm than the Freundlich model. Thanks to the strong affinity of PYDC ligands to I2 and high porosity, the adsorption capacities of UiO-66-PYDC for I2 could reach as high as 1250 mg g−1, which was much higher than those of many other reported MOFs. Additionally, the UiO-66-PYDC MOFs exhibited excellent renewable adsorption properties, prefiguring their great promise as green adsorbents for I2 removal in nuclear waste management.
✓ 已验证
DOI
高影响因子
FUEL
·
2024
·
IF 6.7
Xiao Yang,Zhuwei Yang,Linsen Li,Zhao Jiang,Guangxu Cheng
Dry methane reforming (DRM) represents a highly promising approach to greenhouse gas conversion (CO 2 and CH 4 ) to valuable byproducts. However, severe carbon deposition and catalyst deactivation inhibit large-scale applications. The work designed new catalysts with a yolk-shell structure using the water-in-oil microemulsion method. The catalysts were composed of a yolk-shell structure, with Ni-M as the active point and silica as the shell. The catalytic performance evaluation indicates that the Ni-M @SiO 2 catalysts show higher CH 4 and CO 2 conversion compared with the Ni@SiO 2 and conventional catalysts at 750 ℃, suggesting the yolk-shell structure and added M species enhance the DRM activity. The XRD, HRTEM, XPS, BET, H 2 -TPR, and CO 2 -TPD analysis confirmed the existence of yolk-shell configuration and evident electronic effect among Ni, M species, and SiO 2 . The long term measurements indicate that the added M species also bring higher carbon deposition tolerance for DRM, where Ni-Ce@SiO 2 and Ni-Zr@SiO 2 exhibit good structural and catalytic stability for DRM over 100 h. Through XRD, TEM, and TGA characterizations of the exhausted catalysts, it is determined that the coke deposition resistance of the catalyst is improved as a result of increased oxygen mobility and enhanced Ni dispersion on the catalytic surface, both of which are enhanced by the added Ce species. The structural analysis of the spent catalysts indicates that the tolerance of carbon deposition is improved by the yolk-shell samples. This study can offer valuable insights for the development of Ni-based catalysts with exceptional carbon deposition capability for DRM.
✓ 已验证
DOI
高影响因子
ACS Applied Nano Materials
·
2021
·
IF 5.097
Haojie Zhao,Beili Yi,Xiaomeng Si,Lei Cao,Longxing Su,Yanli Wang,Lien-Yang Chou,Jin Xie
Perfect crystals do not exist; however, the introduction of defects can tailor the physical and chemical properties of materials. Defects in metal–organic frameworks (MOFs) have been demonstrated to be important in many applications, including but not limited to catalysis, gas separation, and energy storage. While a few liquid-phase synthesis methods have been reported to prepare defect-rich UiO-66, the heavy use of organic solvents may cause irreversible environmental problems. Here, we present a green, rapid, and facile solid-state synthesis approach to prepare UiO-66. All UiO-66 crystals remain in the nanometer size due to the limited diffusivity of growth species in solid-state synthesis without a large quantity of the solvent. The defect concentrations can be fine-tuned by the content of ethanol addition. Defect-rich UiO-66 shows excellent catalytic activity to the ring opening of epoxides with alcohols. This work provides insights into the large-scale production of defect-rich MOFs.
✓ 已验证
DOI
高影响因子
JOURNAL OF CHROMATOGRAPHY A
·
2025
·
IF 4
Yufei Liu,Sitian Gu,Wenli Zhu,Man Gong,Qingli Yang,Xiudan Hou
In order to study the adsorption interaction and behavior of organophosphate pesticides (OPPs) on the surface of different microplastics, a Zr-covalent organic framework (COF)-based magnetic solid-phase extraction (MSPE) was established. Due to various interactions (π-π interaction, hydrogen bonding and Zr-O-P coordination interactions), Zr-COF exhibited higher adsorption capacities towards five OPPs than COF without Zr through the theoretical calculation and analysis. The established MSPE-HPLC method showed the detection limit of 0.011–0.019 mg L −1 for OPPs. It was used to determine the adsorption performance of four microplastics towards OPPs. Small sized and aging microplastics showed more adsorption capacities than the large sized and original microplastics. Polylactic acid exhibited higher adsorption capacities than most OPPs, especially with the N element, -NO 2 , and P=O groups, due to the presence of hydrogen bonding. Besides, the method matrix effect was between 2.90%-17.84% in real samples, and the adsorption capacity in juice was significantly higher than that in aquatic samples because of the acidic environment.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Advanced Healthcare Materials
·
2024
·
IF 10
Xian Tong,Yilong Dong,Runqi Zhou,Xinkun Shen,Yuncang Li,Yue Jiang,Huiyuan Wang,Jinguo Wang,Jixing Lin,Cuie Wen
Magnesium (Mg) alloys are widely used in bone fixation and bone repair as biodegradable bone-implant materials. However, their clinical application is limited due to their fast corrosion rate and poor mechanical stability. Here, the development of Mg–2Zn–0.5Ca–0.5Sr (MZCS) and Mg–2Zn–0.5Ca–0.5Zr (MZCZ) alloys with improved mechanical properties, corrosion resistance, cytocompatibility, osteogenesis performance, and antibacterial capability is reported. The hot-extruded (HE) MZCZ sample exhibits the highest ultimate tensile strength of 255.8 ± 2.4 MPa and the highest yield strength of 208.4 ± 2.8 MPa and an elongation of 15.7 ± 0.5%. The HE MZCS sample shows the highest corrosion resistance, with the lowest corrosion current density of 0.2 ± 0.1 µA cm −2 and the lowest corrosion rate of 4 ± 2 µm per year obtained from electrochemical testing, and a degradation rate of 368 µm per year and hydrogen evolution rate of 0.83 ± 0.03 mL cm −2 per day obtained from immersion testing. The MZCZ sample shows the highest cell viability in relation to MC3T3-E1 cells among all alloy extracts, indicating good cytocompatibility except at 25% concentration. Furthermore, the MZCZ alloy shows good antibacterial capability against Staphylococcus aureus .
✓ 已验证
DOI
PubMed
高影响因子
DALTON TRANSACTIONS
·
2026
·
IF 3.3
Yan Liu,Wanting Chen,Bobi Zheng,Han Xu,Jumei Tian
Two novel isostructural coordination polymers, [[Tb₂(H₂dhtp)(2) (H₄dhtp = 2,5-dihydroxyterephthalic acid), were synthesized via solvent evaporation and thoroughly characterized. Fluorescence studies revealed that both compounds exhibit significant quenching upon exposure to Fe³⁺. Notably, they display a unique and concentration-dependent dual-response to Zr⁴⁺ ions, characterized by distinct fluorescence turn-off (0-1.0 mL for 1; 0-0.9 mL for 2) and turn-on (1.0-7.0 mL for 1; 0.9-5.0 mL for 2) regions. To our knowledge, these materials represent the first examples of Zr⁴⁺-sensing probes based on Tb³⁺/Y³⁺ coordination complexes with the H₄dhtp ligand, showcasing significant potential for the design of novel switchable sensors.
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2026
·
IF 10.6
Shihe Zhang,Shuo Li,Yijun Tian,Chengna Dai,Ruinian Xu,Biaohua Chen
Cr-Zr/ZSM-5 converts PE at 280 °C to BTX and SAF with 93% selectivity. • Self-supplied H from BTX formation saturates C 9 -C 16 to SAF without external H 2 . • Zr doping lowers dehydrogenation barrier and boosts electron transfer. The catalytic conversion of polyethylene (PE) into a C 6 -C 8 BTX-rich fraction and a C 9 -C 16 SAF-range hydrocarbon fraction provides a potential route for plastic-carbon valorization, where “SAF-range” refers to the aviation-fuel-relevant carbon-number range rather than to specification-compliant finished SAF. However, many reported PE-upcycling routes require elevated temperatures, external H 2 , noble-metal catalysts, or high catalyst-to-feed ratios. Herein, we report a rationally engineered bifunctional Cr-Zr/ZSM-5 catalyst that converts PE at 280 °C and 0.5 MPa into targeted products with a liquid yield of 62 wt% and approximately 90% selectivity within the BTX-rich C 6 -C 8 fraction and SAF-range C 9 -C 16 hydrocarbons. Combined characterization, pyridine-adsorbed FTIR, online mass spectrometry, in situ FTIR, product analysis, and model-surface DFT calculations support a proposed bifunctional reaction network. A proposed reaction network is constructed, in which initial conversion may involve thermal and surface-assisted fragmentation at accessible external/near-external regions. Cr-Zr oxide-related species may subsequently facilitate adsorption, C-H activation, dehydrogenation, and olefin-intermediate formation. The resulting smaller olefinic intermediates can then undergo Brønsted-acid-initiated secondary conversion within the MFI channels, while product formation is accompanied by dynamic, competitive internal hydrogen redistribution without external H 2 . This work bridges atomic-scale engineering with catalytic function, providing a scalable, mechanism-guided platform for plastic waste valorization and establishing a fundamental mechanistic framework for the rational design of tandem catalytic systems in waste-to-fuel conversion. Download: Download high-res image (206KB) Download: Download full-size image
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Longjiang Jiang,Kaikai Ba,Yanhong Lin,Dejun Wang,Meng Cui,Tengfeng Xie
The extensive solid-liquid interface between the photoanode and the electrolyte solution impedes the kinetics of the oxygen evolution reaction (OER), resulting in a photoelectrochemical (PEC) water splitting efficiency that falls short of theoretical predictions. In this study, by depositing a metal-phytate complex (CoCu-PA) coating onto Ti, Zr co-doped Fe 2 O 3 via a hydrothermal method, we successfully fabricated a CoCu-PA/Ti,Zr:Fe 2 O 3 composite photoanode for water oxidation. Various characterization techniques and electrochemical analyses indicated that Ti, Zr co-doping enhanced the conductivity of Fe 2 O 3 . More importantly, owing to the highly hydrophilic property of CoCu-PA, the charge transfer resistance at the interface between the composite photoanode and the solution is significantly reduced. Furthermore, a built-in electric field was formed within the photoanode, facilitating the rapid migration of photogenerated charges and their efficient injection into the electrolyte to participate in the OER. As a result, the CoCu-PA coating enhanced the OER kinetics of the composite photoanode and led to a photocurrent density of 3.4 mA/cm 2 . This study offers new insights into the design of composite photoanodes to improve charge migration efficiency both within the bulk material and at the solid-liquid interface.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2025
·
IF 3.8
Qiqiang Zhang,Lei Cao,Bo Peng,Hui Zhang,Xingyuan San,Yanchun Zhou,Man Jiang,Qingguo Feng,Chunfeng Hu
MAX phase ceramics, as a family of ternary layered ceramics, have received a lot of attention in the past decade due to their potential as precursors for two-dimensional transition metal carbides. However, due to complex multi-component metallurgical reactions, multicomponent MAX phase ceramics have always faced difficulties in purification and homogenization. This paper identifies a new strategy for synthesizing multicomponent MAX phase ceramics that can eliminate these synthesis difficulties. This path utilizes low-temperature (below 1000°C) stable Ti 2 AlC and carbide powder as initial materials to simplify complex multi-component reactions into a one-step reaction, successfully achieving high purity and precise doping ratio. As an example, four novel doped MAX phase ceramics, Ti 2 MAlC 2 (M = Nb, Ta, W) and Ti 2 HEAlC 2 (HE = 1/7Ti, 1/7V, 1/7Zr, 1/7Nb, 1/7Hf, 1/7Ta, 1/7 W) were successfully synthesized using this method. This dynamic-based design, on one hand, simplifies the reaction mechanism to make purification easier, and on the other hand, the concentrated release of entropy during the reaction process promotes phase transition and related element homogenization.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2025
·
IF 6.2
Feihong Li,Lei Zheng,Zhanjun Liu,Mingyu Zhang,Qizhong Huang
This work delves into the fascinating transformation from organic precursors to dense SiC-modified (Ti, Zr, Hf)C solid solution ceramics. Nanocrystalline powder was crafted through an innovative sol-gel process coupled with carbothermal reduction, followed by spark plasma sintering (SPS) to obtain the multi-phase ceramics. The results indicate that the addition of silicone alkoxide is required for forming a robust multi-phase gel network, which facilitates the formation of oxide intermediates (e.g., ZrSiO 4 , HfSiO 4 ), accelerates phase transformation, and inhibits grain from coarsening by encapsulating Ti/Zr/Hf compounds while reinforcing grain boundaries. After pyrolysis at 1400 °C, the precursors gradually evolved into a highly crystalline, medium-entropy solid solution. The optimal sintered composite achieves a relative density of 97.8 % and an open porosity of 0.4 %. The mechanical properties were improved by induced lattice distortion and effect of fine-grained strengthening with the incorporation of SiC. Nanoindentation tests reveal that the hardness and elastic modulus of the (Ti, Zr, Hf)C-SiC composite reach 22.39 GPa and 342.78 GPa, respectively.
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）