JOURNAL OF THE ENERGY INSTITUTE
·
2025
·
IF 6.2
Yilun Shui,Huiyu Liu,Rui Shan,Min Hao,Chengyu Li,Jun Zhang,Haoran Yuan
The present study proposes a promising strategy for selective pyrolysis of waste tire rubber particles into high-value limonene under the dual action of chemical pretreatments and basic Ca x Mg 1-x Al oxides. The experimental results demonstrate that chemical pretreatments of rubber particles significantly enhance limonene selectivity in pyrolysis products while effectively suppressing the generation of sulfur-containing compounds. Among the various pretreatments, the rubber particles pretreated with 1 wt.% sulfuric acid exhibits optimal performance, which achieves a relative limonene content as high as 35%. The introduction of Ca 0.3 Mg 0.7 Al substantially promotes the selective production of limonene that gives a maximum relative content of 46% in pyrolysis oils. Kinetic analysis confirms that the application of as-prepared Ca 0.3 Mg 0.7 Al greatly lowered the average activation energy from 245.8 kJ/mol to 217.5 kJ/mol for waste tire rubber particles pyrolysis. Moreover, the plausible reaction pathway for waste tire rubber particles pyrolysis under the action of chemical pretreatments and composite metal oxides was proposed. This study, through experiments under ideal laboratory conditions, clarifies the core mechanism of the synergistic regulation of limonene selectivity by chemical pretreatments and basic Ca x Mg 1-x Al oxides, and provides basic research support and technical development directions for the subsequent targeted conversion of industrial-scale waste tire rubber into high-value limonene-rich pyrolysis oils.
研究领域:
环境科学
·
材料化学
·
能源工程
·
绿色化学
·
资源循环利用
·
热解技术
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Weichen Xu,Xiaomeng Li,Hong Wang,Fuliang Wang,Shouqiang Han,Jing Guo
Microwave dielectric ceramics are critical components in wireless communications. However, it is still a challenge to develop microwave dielectric ceramics with reduced sintering temperatures, high thermal stabilities and good dielectric properties at the same time. Herein, the entropy value, which is able to modulate the grain boundary energy and adjust the inherent sintering temperature, is engineered to develop high-performance microwave dielectric ceramics with low sintering temperatures. The structure-property relationships of AWO 4 ceramics, including (NaCaBi) 1/3 WO 4 , (NaCaSrBi) 1/4 WO 4 , (NaLiCaBiSm) 1/5 WO 4 and (NaLiCaSrBiSm) 1/6 WO 4 with increased entropy values are investigated systematically. X-ray diffraction and high-resolution TEM analyses confirm the formation of single-phase solid solutions with the tetragonal scheelite structure in AWO 4 ceramics. As the number of elements in the A-site varies, the relative permittivities, Q × f values and TCF values shift in the range of 12.2–16.5, 8,000–25,000 GHz and −32.3–31.6 ppm/°C, respectively. Simultaneously, the high-entropy samples demonstrate the lowest sintering temperature of 750 °C among the four formulations. Phillips-Van Vechten-Levine (PVL) complex chemical bond theory reveals that the covalency, lattice energy and bond energy affect the relative permittivity, Q × f value and TCF value, respectively. Raman spectra suggest that high entropy value leads to increased disorder, and infrared reflectivity spectra illustrate that the dielectric response is dominated by polarized optical phonons of [WO 4 ] tetrahedron. It is anticipated that entropy design will facilitate the development of microwave dielectric ceramics in low temperature co-fired ceramic applications.
研究领域:
材料科学
·
陶瓷
·
介电材料
·
电子材料
·
固态化学
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
·
2025
·
IF 4.6
Pengfei Tian,Yunan Shen,Yuzhe Hua,Zilong Chen,Zhifan Chen,Qingjie Guo,Hongjing Tian
Calcium lignosulfonate, an important natural anionic surfactant widely used in chemical, agricultural and construction applications, was employed to enhance the desulfurization performance of Ca(OH) 2 by adjusting its crystal growth at the atomic level. In the digestion of CaO, calcium lignosulfonate was selectively adsorbed onto the 101 surface of Ca(OH) 2 crystal by the interaction between the sulfonic acid group of calcium lignosulfonate and Ca(OH) 2 surface. The specific adsorption was proved to inhibit the growth of the 101 crystal surface owing to the steric hindrance and electronic interactions. DFT calculations show that the adsorption energy is −1.70 eV, and the change in free energy is negative, indicating spontaneous adsorption. By XRD and SEM characterization results and DFT simulation results, while boost the Ostwald ripening of the 001 surface to form the ultrathin nanosheets with a thickness of 16–21 nm. PDOS simulation results testified that the transferring of lone pair electrons from 2p orbital to the empty 3d-orbitals of calcium and the formation of Ca-O bond because of 0.08 Ha blue shift and broadening of the 2p-orbitals of oxygen. Additionally, the calcium lignosulfonate (CLS) modified Ca(OH) 2 exhibited the increase of BET surface area by 62 % from 30.09 m 2 /g to 48.76 m 2 /g and developed a mesoporous structure with the pore volume of 0.248 cm 3 /g. Consequently, the sulfur capacity of Ca(OH) 2 –15.62 mg/g in comparison to pristine Ca(OH) 2 without CLS, while the penetration times for desulfurization experiments increased from 3300 s to 7600 s.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2021
·
IF 8.067
Kun Li,Luxin Liang,Peng Du,Zeyun Cai,Tao Xiang,Hiroyasu Kanetaka,Hong Wu,Guoqiang Xie
Magnesium (Mg) alloys can be regarded as the most promising biodegradable implant materials for orthopedic and stent applications due to their good biocompatibility and low Young's modulus which is near to that of natural bone. However, its applicability is hindered because it exhibits a high corrosion rate in the physiological environments. In this work, we fabricated Mg 66 Zn 30 Ca 4 /Fe bulk metallic glass composites via spark plasma sintering (SPS). We studied the influence of different contents of Fe on the properties of the composites. The results indicated that Fe was uniformly distributed on the surface of Mg 66 Zn 30 Ca 4 metallic glass (MG) as a second phase, which led to an improvement in the corrosion resistance and mechanical strength. The standard potential of Mg 66 Zn 30 Ca 4 /Fe bulk metallic glass (BMG) composites increased as compared to Mg 66 Zn 30 Ca 4 , while their mechanical strength improved from 355 MPa to 616 MPa. Furthermore, cytotoxicity was investigated via the CCK-8 assay and calcein-AM staining, which revealed that the extraction mediums diluted 6 times (EM × 6) of the Mg 66 Zn 30 Ca 4 and Mg 66 Zn 30 Ca 4 /Fe did not cause cell toxicity on day 3 and 5, while the EM × 6 of the Mg 66 Zn 30 Ca 4 showed cytotoxicity on day 1, 3 and 5. Thus, Mg 66 Zn 30 Ca 4 /Fe BMG composites exhibit significant potential for fabricating implants with good mechanical strength and corrosion resistance.
研究领域:
材料科学
·
生物医学工程
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2017
·
IF 3.582
Lingwei Lu,Shuang Ni,Gang Liu,Xiaoxiang Xu
The crystal structure of a photocatalyst generally plays a pivotal role in its electronic structure and catalytic properties . In this work, we synthesized a series of La/Cr co-doped perovskite compounds ATiO 3 (M = Ca, Sr and Ba) via a hydrothermal method . Their optical properties and photocatalytic activities were systematically explored from the viewpoint of their dependence on structural variations, i.e. impact of bond length and bond angles. Our results show that although La/Cr co-doping helps to improve the visible light absorption and photocatalytic activity of these wide band gap semiconductors , their light absorbance and catalytic performance are strongly governed by the Ti O bond length and Ti O Ti bond angle. A long Ti O bond and deviation of Ti O Ti bond angle away from 180° deteriorate the visible light absorption and photocatalytic activity. The best photocatalytic activity belongs to Sr 0.9 La 0.1 Ti 0.9 Cr 0.1 O 3 with an average hydrogen production rate ∼2.88 μmol/h under visible light illumination (λ ≥ 400 nm), corresponding to apparent quantum efficiency ∼ 0.07%. This study highlights an effective way in tailoring the light absorption and photocatalytic properties of perovskite compounds by modifying cations in the A site.
研究领域:
材料科学
·
物理化学
·
能源化学
·
无机化学
·
光催化
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2018
·
IF 3.779
Chen Zhou,Hui Zhang,Jianian Cheng,Hongyi Li,Sadeh Beysen
Two new isostructural lead borates , Pb 8 Mg(BO 3 ) 6 and Pb 8 Ca(BO 3 ) 6 , have been synthesized via high temperature solution method. The single crystal structures of title compounds contain ∞ [Pb 8 B 6 O 18 ] 2- double layers composed of planar BO 3 triangles, Pb(2)O 9 and distorted Pb(1)O 5 polyhedra, these layers condense in c -axis, and the MgO 6 (or CaO 6 ) polyhedra fill into the layers, forming a three-dimensional framework. The stereochemical activity of lone pair (SCALP) electrons were found in the Pb(1)O 5 polyhedra, which combine with the BO 3 units, generating strong optical anisotropy . The calculated birefringences of Pb 8 Mg(BO 3 ) 6 and Pb 8 Ca(BO 3 ) 6 using first-principles method are 0.15@1064 nm and 0.12@1064 nm, respectively, which are comparable to the commercial α -BaB 2 O 4 (α-BBO) crystal and imply that they probably can be used as birefringent materials. The electronic structures, density of states of title compounds were calculated by density functional theory (DFT). Meanwhile, the TG-DSC curves, infrared spectral and UV–Vis–NIR diffuse reflectance spectral were measured.
研究领域:
无机化学
·
材料科学
·
晶体工程
·
非线性光学材料
·
固体化学
✓ 已验证
DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2023
·
IF 3.6
Mingsheng Cai,Tianchun Lang,Shuangqiang Fang,Tao Han,Damir Valiev,Houjiang You,Chong Liu,Jing Yu,Peng Su,Xiaolong Jing,Guanghui Ge,Bitao Liu,Elena F. Polisadova
Fluorescent materials are widely used for anti-counterfeiting of information security and commodities. However, the increasing requirements for fluorescent anti-counterfeiting technology urgently require the development of novel fluorescent materials with multicolor fluorescence, single component, and excellent stability. Herein, a color tunable Ba 0·94 Ca 0.06 ScO 2 F: Eu 2+ , Bi 3+ , K + perovskite with dependence of excitation wavelength for high-level anti-counterfeiting is reported. The fluorescence spectra of Ba 0·94 Ca 0.06 ScO 2 F: Eu 2+ , Bi 3+ , K + perovskite show the tunable emission band with the peak between 479 and 509 nm. It is worth noting that the peak intensity ratio at 479 and 509 nm changes with the dependence of the excitation wavelength. Meanwhile, the snowflake pattern is designed to demonstrate the potential applications in anti-counterfeiting, which obviously shows four different color patterns under the sunlight, 320 360, and 415 nm excitation, respectively.
研究领域:
材料科学
·
光学材料
·
防伪技术
·
发光学
·
光子学
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2024
·
IF 8.1
Chenxiao Wang,Kui Liu,Yinghao Wu,Guangjun Zhang,Xuelian Li,Jiaxin Wu,Ruili Sun,Ting Chen,Lang Xu,Shaorong Wang
A-site doping with Ca 2+ , Sr 2+ for the cobalt-free BaFeO 3-δ -based cathode materials for proton-conducting ceramic fuel cells (PCFCs) is studied. The composite Ba 0·8 Ca 0·2 FeO 3-δ (BCF0.2)-BaZr 0.1 Ce 0·7 Y 0.1 Yb 0.1 O 3-δ (BZCYYb) and Ba 0·8 Sr 0·2 FeO 3-δ (BSF0.2)-BZCYYb electrode show polarization resistance (R p ) of 0.156 Ω cm 2 and 0.308 Ω cm 2 at 700 °C, respectively. It is found that the Ca or Sr doping not only benefits oxygen vacancy formation and ion migration but also optimizes the surface oxygen reduction reaction (ORR) process. The density functional theory (DFT) calculations show that the Gibbs energies of *OOH and *OH intermediates are decreased, indicating an enhanced surface ORR. The PCFC with BCF0.2-BZCYYb composite cathode achieves the maximum power density of 299.75 mW cm −2 at 700 °C and shows good stability at 650 °C for 65 h under a constant voltage of 0.75 V. These findings suggest that the BCF0.2-BZCYYb has the potential to serve as cobalt-free cathode materials for PCFCs.
研究领域:
材料科学
·
能源科学
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2026
·Vol. 61
·期 35
·26114-26129
·
IF 4.4
Fan Yan,Sun Xueqin,Bi Tao,Hou Bo,Lu Fang
The accumulation of tetracycline antibiotics in water environments can lead to the emergence of antibiotic-resistant bacteria and resistance genes, posing a potential threat to ecosystems and human health. Therefore, the development of cost-effective and efficient methods for the remediation of antibiotic wastewater has become a current research hotspot. In this study, a novel photocatalyst, UiO-66-CA-Cu (CA was the abbreviation for “citric acid”), was prepared by two-step functionalization modification of the MOF material (University of Oslo-66, abbreviated as UiO-66). Under irradiation of simulated sunlight, UiO-66-CA-Cu-led photocatalysis and peroxymonosulfate (PMS) activation co-degradation system achieved 93.3% ( k = 0.04712 min −1 ) removal efficiency of tetracycline hydrochloride (20 mg/L, 50 mL) within 60 min. The functional modification was used to optimize the local environment of the parent MOF. The asymmetry of the Zr–O cluster structure introduced by CA could effectively improve the separation efficiency of photogenerated carrier in the material, and the introduced Cu 2+ ions could be used as the activation site to further enhance the material’s activation ability to PMS. Graphical In this work, a novel photocatalyst, UiO-66-CA-Cu (CA was the abbreviation for “citric acid”), was prepared by two-step functionalization modification of the MOF material (UiO-66). Under simulated sunlight irradiation, the degradation system constructed by the photocatalyst UiO-66-CA-Cu coupled with peroxymonosulfate (PMS) activation could achieve efficient removal of tetracycline hydrochloride (removal efficiency: 93.3%, k = 0.04712 min -1 ). In addition, we systematically investigated the effects of PMS concentration, photocatalyst concentration and initial pH value on the degradation performance over this system, and further proposed the possible degradation mechanism.
✓ 已验证
产品关联
DOI
高影响因子
Small
·
2026
·
IF 11.8
Xinyi Li,Jinfeng Li,Yaoxun Zeng,Jiapeng Dong,Shencheng Xie,Zhili Ran,Fangzheng Chen,Junze Tang,Guibo Lu,Xinlu Fu,Yan He,Xujie Liu
Osteolytic bone metastasis remains difficult to treat because effective tumor eradication and bone regeneration must be achieved simultaneously. Current calcification-based strategies are constrained by their reliance on exogenous phosphate, and poor integration with controllable therapeutic modalities. Herein, we report a tumor adhesive metal-phenolic network nanoplatform that enables phosphate-independent membrane biomineralization combined with photothermal amplification. The Ru/Ca-TA-ALN network, assembled from ruthenium ions (Ru 3+ ), calcium ions (Ca 2+ ), tannic acid (TA), and alendronate (ALN), co-integrates Ca 2+ and phosphate-bearing moieties within a single coordination framework, allowing autonomous mineral deposition upon adhesion to tumor cell membranes. This membrane-confined calcified interface induced S-phase arrest, and impaired tumor viability. Under 1064 nm near-infrared (NIR) irradiation, Ru 3+ -mediated photothermal activation amplifies tumor cell apoptosis. Beyond tumor inhibition, the calcified nano-bio interface promoted osteogenic differentiation while suppressing osteoclastogenesis, shifting the bone microenvironment toward regeneration. In a murine breast cancer bone metastasis model, calcification-photothermal synergy significantly reduced tumor burden, mitigated bone destruction, and prolonged survival, while maintaining favorable biocompatibility. By transforming biomineralization into a controllable interfacial therapeutic modality, this work establishes a strategy that couples tumor suppression with bone reconstruction for metastatic bone disease.
✓ 已验证
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2026
·Vol. 14
·期 35
·15530-15540
·
IF 7.6
Liu Jinpeng,Deng Runze,Mai Songlang,Zou Yuanhua,Marwat Mohsin Ali,Wang Junya,Tran Nguyen-Minh-An,Zhu Hanfei,Zhang Haibo,Tan Hua
Dielectric thin film capacitors are characterized by high energy density, rapid charge-discharge, high usable efficiency, and high breakdown field strength, and are widely used in electronics and novel energy technologies. To address the trade-off among polarization, efficiency, and breakdown strength in traditional single-layer dielectric capacitors, this study employs a low-cost sol-gel method to synthesize a BTO/PLCT/BTO sandwich structure film. By optimizing the annealing process, an amorphous/ferroelectric/amorphous multilayer phase structure coexistence was achieved. With increasing annealing temperature, the polarized nanoregions within the amorphous BTO layer expand, while the PLCT layer crystallizes into a ferroelectric phase. At 600 ° C, the synergistic amorphous/ferroelectric/amorphous phase effect is optimized, yielding an energy storage density of 80 J/cm 3 and an efficiency of 86% under an electric field of 5.4 MV/cm. Meanwhile, from room temperature to 150 ° C, the film achieves excellent dielectric and energy storage stability over a wide temperature range (variation rates of dielectric property and energy storage performance below 5%). After 10 9 fatigue cycles, the film still maintains the stability of its electrical performance (variation rate of Δ W rec /Δ W rec-initial ≤ 4%). This amorphous/ferroelectric/amorphous composite film overcomes the trade-off among polarization, usable efficiency, and breakdown strength inherent in single-phase materials, providing a viable strategy for fabricating high-stability energy storage films.
✓ 已验证
产品关联
DOI
高影响因子
Microstructures
·
2026
·Vol. 6
·期 2
·N
·
IF 8.5
Zichen He\u003Csup\u003E1,\u003C\u002Fsup\u003E,Xingyu Chen\u003Csup\u003E1,2,\u003C\u002Fsup\u003E,Faqiang Zhang\u003Csup\u003E1\u003C\u002Fsup\u003E,Zhengqian Fu\u003Csup\u003E1\u003C\u002Fsup\u003E,Xiangyu Meng\u003Csup\u003E3\u003C\u002Fsup\u003E,Dongxiao Fan\u003Csup\u003E4\u003C\u002Fsup\u003E,Jiawei Zhang\u003Csup\u003E1\u003C\u002Fsup\u003E,Mingsheng Ma\u003Csup\u003E1\u003C\u002Fsup\u003E,Yongxiang Li\u003Csup\u003E5\u003C\u002Fsup\u003E,Zhifu Liu\u003Csup\u003E1\u003C\u002Fsup\u003E
With the ongoing miniaturization of multilayer ceramic capacitors (MLCCs), there is an increasing demand for dielectric materials that simultaneously exhibit high dielectric constant, excellent DC-bias stability, and high reliability. To address this challenge, B-site Ca doping was employed to regulate the polar structure of BaTiO3-based ceramics. In this study, we systematically investigated the effects of Ca doping on the crystal structure, defects, and microstructure by varying the dopant concentration and occupancy behavior. The B-site Ca-doped BaTiO3 ceramics exhibit a pseudo-cubic structure, characterized by the coexistence of tetragonal and cubic phases. Ca2+ substitution for Ti4+ disrupts the long-range ferroelectric order, leading to the formation of polar nanoregions (PNRs) interconnected and embedded within a non-polar matrix. Defect analysis and studies on reducing atmosphere sintering reveal that oxygen vacancies are effectively localized by cation defects, thereby suppressing long-range conduction. These structural features synergistically result in a high dielectric constant, superior DC-bias stability, enhanced insulation resistance, and strong non-reducibility. This work provides fundamental insights into the microstructural design of BaTiO3-based ceramics and highlights their potential for high-reliability MLCC applications.
✓ 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）