ADVANCED POWDER TECHNOLOGY
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2025
·
IF 4.2
Xu Li,Fei Wang,Li Yu,Rui Liu,Weizhou Jiao,Ruixin Wang
Recently, transition-metal carbides (TMCs) have been developed as good catalyst candidates for oxidation desulfurization (ODS) reactions. However, improving their stability in strong oxidizing media remains a challenge. Herein, a W 2 C catalyst protected by spherical N-doped carbon was constructed in-situ through a facile one-step thermal annealing process using phosphotungstic acid and zinc phthalocyanine microsphere (ZnPcMS) as the W and carbon sources, respectively. During annealing, the spherical N-doped carbon matrix (SNC) was simultaneously derived from ZnPcMS and combined closely with the in-situ formed W 2 C, preventing W 2 C from oxidation. The W 2 C/SNC catalyst system, when combined with H 2 O 2 as the oxidant, exhibits remarkable ODS performance. Desulfurization of model fuel oils can be achieved with 100 % efficiency within 25 min with a small H 2 O 2 to S molar ratio of 3. Moreover, W 2 C/SNC possesses superior reusability. A non-free radical oxidation mechanism is suggested for the ODS reaction based on radical scavenging tests. The as-prepared W 2 C/SNC microspheres could serve as potential effective ODS catalysts.
研究领域:
材料科学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
Desalination and Water Treatment
·
2024
·
IF 1
Wen-bin Li,Jiang-ming Ou-yang,Ke Xie,Hong-yan Deng,Yin-fei Wang,Touqeer Abbas,Bixia Wang
This study investigated the adsorption performance of antibiotics using modified semi-carbonized fibers (SCF) prepared from polyacrylonitrile and loaded with metal ions. Nitrated semi-carbonized fibers (N-SCF) and magnetized–nitrated semi-carbonized fibers (MN-SCF) were prepared through nitrification and magnetization methods, and different metal ion-loaded MN-SCFs were obtained by loading Ca and Mg ions onto MN-SCF. The effects of pH, temperature, and ionic strength on antibiotic adsorption were analyzed. The adsorption kinetics and thermodynamics of tetracycline (TC), chlortetracycline (CTC), and oxytetracycline (OTC) were studied using batch experiments. Results showed that (1) the adsorption of antibiotics on the tested materials initially increased and then decreased with increasing pH and ionic strength, reaching maximum values at pH 4 and 0.1 mol/L, respectively. (2) Higher temperatures facilitated the adsorption of antibiotics on the materials, which followed a chemisorption mechanism. (3) The Langmuir model provided a better fit for the adsorption isotherms of TC, CTC, and OTC compared with the Freundlich model, suggesting monolayer adsorption. (4) The maximum adsorption capacity ( q m ) of the antibiotics ranged from 0.80 to 3.97 mg/g, with of CTC > OTC > TC. Metal ion-loaded MN-SCFs exhibited higher adsorption amounts compared with MN-SCF alone.
研究领域:
环境科学
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材料科学
✓ 已验证
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2025
·
IF 5.6
Xiaomei Chen,Yuefeng Wu,Yanpeng Wang,Zezhong Li,Yusheng Luo,Yongcheng Jin,Xiaolin Che,Wei Liu
Silicon anodes hold great promise for high-energy lithium-ion batteries but suffer from severe volume expansion and unstable solid electrolyte interphase (SEI) formation. To address these challenges, this study develops a thermally crosslinked dual-polymer (KH550/sodium alginate) coating strategy. The 350 °C-pyrolyzed coating forms a semi-carbonized artificial SEI on the surface of Si particles that effectively suppresses side reactions and accommodates volume changes. Comparing with uncarbonized polymer coating, the denser semi-carbonized one demonstrates its unique effect in matching Li⁺ diffusion kinetics between the interface and bulk silicon, retaining the structural integrity of Si particles during lithiation. The resulting Si anode exhibits minimal volume expansion (8%), 82.5% initial Coulombic efficiency, 948 mAh g⁻¹ after 500 cycles at 2 A g⁻¹, thereby developing a new gate on enhancing electrochemical performance by pre-constructing semi-carbonized polymer coating around Si particles.
✓ 已验证
产品关联
DOI
高影响因子
Toxics
·
2022
·Vol. 10
·期 9
·489
·
IF 4.472
Chunlin He,Yun Liu,Chunhui Zheng,Yanming Jiang,Yan Liao,Jiaxin Huang,Toyohisa Fujita,Yuezhou Wei,Shaojian Ma
Utilising waste amine-oxime (WAO) resin through microwave semi-carbonization, a carbon adsorbent (CA) was obtained to remove Pb(II). After microwave treatment, the pore size of the skeleton structure, three-dimensional porous network, and lamellar pore structure of WAO was improved. The distribution coefficient (Kd) of Pb(II) onto CA is 620 mL/g, and the maximum adsorption capacity of Pb(II) is 82.67 mg/g after 20 min of WAO microwave treatment. The adsorption kinetics and adsorption isotherms conform to the quasi-second-order kinetic equation and Langmuir adsorption isotherm model, respectively. The surface of MT-WAO is negatively charged and the adsorption mechanism is mainly electrostatic interaction. Pb(II) elution in hydrochloric acid solution is more than 98%, and its recovery is high at 318 K and for 1 h.
研究领域:
环境化学
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吸附科学
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资源回收利用
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水污染治理
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功能材料
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）