INORGANIC CHEMISTRY COMMUNICATIONS
·
2025
·
IF 5.4
Xuechang Ren,Suying Ding,Renhua Chen,Ning Fu
This study addresses the limited Fe 3+ /Fe 2+ conversion in homogeneous Fenton-like systems by introducing reducing MoS₂ as a co-catalyst to the Fe 3+ /PMS system, while simultaneously investigating the effect of MoS₂ crystal structure on reaction kinetics. Hydrothermally synthesized 1 T/2H-MoS₂ (denoted as M-x) significantly enhanced phenol degradation in the Fe 3+ /PMS system. Among the catalysts, M-180 demonstrated optimal performance, achieving 91.14 % phenol degradation within 20 min. XPS analysis revealed a positive correlation between 1 T-phase content and degradation efficiency, confirming that 1 T-MoS₂ facilitates Fe 3+ /Fe 2+ redox cycling to promote efficient PMS activation. Radical quenching experiments and electron paramagnetic resonance (EPR) spectroscopy further identified SO₄· − , 1 O₂, and O₂· − as the primary reactive species.
研究领域:
环境化学
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催化
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纳米材料
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水处理
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高级氧化工艺
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
·
2014
·
IF 2.063
Jianrong Li,Jinsheng Chen,Yanke Yu,Chi He
The Fe–Mn–Ce/CP catalyst prepared by the incipient-wetness impregnation method was investigated for elemental mercury (Hg 0 ) removal in simulated coal-fired flue gas . The incorporation of Fe could remarkably enhance the SO 2 -resistance of Fe–Mn–Ce/CP catalyst at low temperature, and the existence of water vapor had negative impact on Hg 0 removal efficiency. More than 95% of Hg 0 could be removed at 100 °C under the conditions of 60 ppm HCl, 3% O 2 ( v/v ), 5% H 2 O ( v/v ) and 400 ppm SO 2 . Hg-TPD results indicated that Hg 0 adsorption amount decreased after the addition of H 2 O or SO 2 . The XPS results revealed that the incorporation of Fe could enhance the contents of high valence Mn x + (i.e., Mn 3+ /Mn 4+ ) and Ce 3+ species in the composite catalysts, which are favorable for the oxidation process of elemental mercury. The surface characteristics were not the primary factor determining the catalytic activity . Overall, the catalytic performance of the Fe–Mn–Ce/CP catalyst was closely related to the Fe 3+ state, high ratios of (Mn 4+ + Mn 3+ )/Mn 2+ and high content of not fully coordinated cerium species.
研究领域:
环境催化
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大气污染防治
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能源化学工程
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材料科学与工程
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表面化学
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烟气净化技术
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DOI
高影响因子
CATALYSIS LETTERS
·
2018
·Vol. 148
·期 9
·2799-2811
·
IF 2.911
Huang Qifu,Li Wenzhi,Lei Yanyan,Guan Shengnan,Zheng Xusheng,Pan Yang,Wen Wu,Zhu Junfa,Zhang Haitao,Lin Qizhao
Abstract In this work, NiCo 2 O 4 with a hierarchical porous flower-like structure was fabricated and used as catalyst support for Pd nanoparticles. The NiCo 2 O 4 was composed of porous nanoplates without overlapping, and the Pd nanoparticles were uniformly distributed on these nanoplates. Pd–NiCo 2 O 4 with the Pd loading of 2.0 wt% showed extremely high activity and stability, methane (1.0% CH 4 /Air) can be totally oxidized at 330 °C and the T 90 is 309 °C, which is much lower than that of pure NiCo 2 O 4 (T 90 = 405 °C). At wet condition with the presence of 10 vol% water vapor, the catalytic activity was still acceptable with the T 90 of 366 °C, and no activity decrease or permanent damage for the catalyst was observed after 35 h reaction, showing high stability. A series of techniques including TEM, SEM, XRD, H 2 -TPR, BET and especially quasi in situ XPS combined with in situ MS were used to characterize the catalysts and investigate the catalysis mechanism. Two pathways of CHO evolution were proved by the quasi in situ XPS and in situ MS results: OCHO intermediate dehydrogenation pathway at lower temperature and CO oxidation pathway of CHO at higher temperature. Graphical Abstract
研究领域:
化学
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材料科学
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催化
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环境科学
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产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Liuxiang Wang,Cibin Wang,Youzhi Liu,Weizhou Jiao
The valorization of coal tailings presents an essential approach to addressing their significant environmental challenges. This study employs a defect engineering approach by introducing a significant number of sulfur vacancies (SVs) on the surface of coal tailings to activate peroxymonosulfate (PMS) for the efficient degradation of phenol wastewater. In the coal tailings/peroxymonosulfate (ICT/PMS) system, phenol was completely degraded within 30 min at pH= 7 with 0.3 g coal tailings and 4 mM PMS. Additionally, comparative analysis identified SVs as the key factor enhancing phenol degradation via Fe-S synergy. XPS confirmed ball-milling increased S²⁻ content from 27.65 % to 58.04 %, promoting iron redox cycling. Sulfur facilitates iron redox cycling through homogeneous/heterogeneous routes. Importantly, density functional theory (DFT) calculations identified that coal tailings containing Sv possessed higher adsorption energy for PMS compared to pristine tailings. These discoveries provide novel insights into the resource utilization of coal tailings and environmental pollution remediation.
研究领域:
环境科学
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化学工程
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材料科学
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废弃物管理
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产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2025
·
IF 8.3
Ying Zhang,Jiaqi Yang,Kai Wei,Yulu Xue,Liying Cai,Huarui Han,Changchang Ma,Sheng Feng
The thoughtful construction of highly efficient, tiered photocatalysts has become a focal point of interest. Herein, in this context, the step-scheme (S-scheme) AlBi-MOF/MgNiAl-LDH heterojunction is specifically engineered to facilitate the photocatalytic reduction of CO 2 . The CO 2 photocatalytic reduction experiments of three samples, AlBi-MOF, MgNiAl-LDH and AlBi-MOF/MgNiAl-LDH, were conducted for 5 h using triethanolamine as the sacrificial agent, the optimized sample demonstrates significantly enhanced CO 2 photoreduction efficiency compared to the control without treatment, i.e., AlBi-MOF and MgNiAl-LDH. The optimized AlBi-MOF/MgNiAl-LDH exhibited a CO 2 reduction rate of 86.84 μmol g −1 h −1 , which was 25.85 times higher than that of MgNiAl-LDH alone and 20.15 times higher than that of AlBi-MOF alone. The improved photocatalytic efficiency is mainly attributed to the decreased recombination of photogenerated charge carriers, facilitated by S-scheme heterojunction. Additionally, the large specific surface areas and abundant active sites also contribute to the improvement. Meanwhile, the S-scheme photocarrier transfer mechanism was verified by in situ X-ray photoelectron spectrum (XPS) and femtosecond transient absorption spectroscopy (fs-TA). This research outlines an effective methodological for advancing highly efficient heterojunction photocatalysts dedicated to the transformation of solar energy into fuel.
研究领域:
材料科学
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纳米技术
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环境科学
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能量转换
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物理化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materiomics
·
2021
·
IF 6.425
Yang Yin,Jing-Ru Yu,Yu-Cheng Tang,Ai-Zhen Song,Huan Liu,Dong Yang,Jing-Feng Li,Lei Zhao,Bo-Ping Zhang
NaNbO 3 -based ceramics usually show ferroelectric-like P-E loops at room temperature due to the irreversible transformation of the antiferroelectric orthorhombic phase to ferroelectric orthorhombic phase, which is not conducive to energy storage applications. Our previous work found that incorporating CaHfO 3 into NaNbO 3 can stabilize its antiferroelectric phase by reducing the tolerance factor ( t ), as indicated by the appearance of characteristic double P-E loops. Furthermore, a small amount of MnO 2 addition effectively regulate the phase structure and tolerance factor of 0.94NaNbO 3 -0.06CaHfO 3 (0.94NN-0.06CH), which can further improve the stability of antiferroelectricity. The XRD and XPS results reveal that the Mn ions preferentially replace A-sites and then B-sites as increasing MnO 2 . The antiferroelectric orthorhombic phase first increases and then decreases, while the t shows the reversed trend, thus an enhanced antiferroelectricity and the energy storage density W rec of 1.69 J/cm 3 at 240 kV/cm are obtained for 0.94NN-0.06CH-0.5%MnO 2 (in mass fraction). With the increase of Mn content to 1.0 % from 0.5 %, the efficiency increases to 81 % from 45 %, although the energy storage density decreases to 1.31 J/cm 3 due to both increased tolerance factor and non-polar phase.
研究领域:
材料科学
·
陶瓷
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储能
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电陶瓷
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DOI
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 27
·22250-22268
·
IF 3.289
Z. Zhang,N. C. Tian,X. D. Huang,W. Shang,L. Wu
The synergistic corrosion inhibition effect of indigo carmine and three kinds of cationic organic compounds on 1045 carbon steel (CS) in 0.5 M HCl solution is reported. Electrochemical measurements showed that these three cationic organic compounds combined with indigo carmine reduce the speed of corrosion on 1045 CS and act as effective inhibitors. The combination of indigo carmine with BAB resulted in the best synergistic corrosion inhibition effect (S = 17.14), and the best inhibition efficiency (95.0%). SEM images and XPS data of the corroded steel surfaces suggested that the indigo disulphonate anion and organic cation could be simultaneously adsorbed on the CS surface to inhibit the corrosion of iron. The synergistic inhibition mechanism was investigated by dynamic simulations using quantum chemistry.
研究领域:
材料腐蚀与防护
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物理化学
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金属材料科学
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表面科学
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电化学
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量子化学
✓ 已验证
DOI
高影响因子
Molecular Catalysis
·
2022
·
IF 5.089
Canshuo Gu,Lungang Chen,Yong Liu,Xinghua Zhang,Jianguo Liu,Qi Zhang,Chenguang Wang,Longlong Ma
The production of furanic biofuel 2-methyltetrahydrofuran (2-MTHF) has been studied by hydrodeoxygenation of biomass-derived levulinic acid (LA) over bimetallic NiCo/γ-Al 2 O 3 catalyst. The contents of Ni and Co in NiCo/γ-Al 2 O 3 were investigated. The Ni 5 Co 25 /γ-Al 2 O 3 catalyst gave high activity in hydrodeoxygenation of LA with a 73.4% yield of 2-MTHF under optimal conditions. The crystal phase, valence states, acidity and basicity of catalysts were measured by multiple characterizations to understand the relationships among 2-MTHF yields and catalyst properties. XPS characterization revealed that the number of metal oxides increased on bimetallic catalysts while the reduced metals occupied on monometallic catalysts. The bimetallic catalysts also presented increased acidity than that of monometallic catalysts. These distinct properties were also observed among bimetallic catalysts with different contents of Ni and Co, which were responsible for different performances. Besides, the solvent effect on the structure of 1,4-pentanediol, which was further converted to 2-methyltetrahydrofuran, was disclosed by molecular dynamics simulations.
研究领域:
化学工程
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催化
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生物燃料
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材料科学
✓ 已验证
DOI
高影响因子
FUEL
·
2022
·
IF 8.035
Defu Yin,Renjie Ji,Jingyun Zhang,Shitao Yu,Lu Li,Shiwei Liu,Long Jiang,Ying Liu,Zhanqian Song,Yue Liu
A core–shell catalyst composed of mCeO 2 shell and Pd metal core was prepared by one-pot wet chemical method and used for the hydrogenation of phenol to cyclohexanone. The phenol conversion and cyclohexanone selectivity were 96.3 % and 95.3 % at reaction conditions of 50 min, 80 °C and 1 MPa H 2 . The effects of Ce species and Br species in the preparation of catalysts was studied, and the synthesis mechanism of core–shell Pd@mCeO 2 catalysts was preliminarily revealed. By discussing the phenol adsorption mechanism and the redox properties of the catalyst, the activation of H 2 by Pd sites and phenol by cerium oxide (CeO 2 ) sites of the surface were studied. H 2 -TPR and XPS characterization were used to explain the effect of Ce species and Br species for the catalytic performance. These results indicated that the electronic structure of Pd was regulated by the interaction between Pd and Ce, and different O sites were generated around the Pd sites. In situ IR spectra indicated that phenol was adsorbed and dissociated on cerium to form phenoxy species and water, this synergistic catalytic pattern of carrier activated substrate and hydrogenation site promoted the hydrogenation of phenol and improved the catalytic efficiency.
研究领域:
催化
·
化学工程
·
材料科学
·
物理化学
✓ 已验证
产品关联
DOI
高影响因子
MINERALS ENGINEERING
·
2025
·
IF 5
Song Zou,Liyong Xu,Xinyang Yu,Hong Zhong
Effective collectors are crucial for efficient galena (PbS) flotation beneficiation. This study introduces a novel synergistic mixed collector system, comprising sodium diethyl dithiocarbamate (DTC) and O,O’-bis(2-butoxyethyl) ammonium dithiophosphate (BEAT), for enhancing galena recovery and selectivity against sphalerite. Microflotation tests demonstrated that a premixed DTC/BEAT system (1:1 M ratio, at the total dosage of 2 × 10 −5 mol/L) at pH ∼ 7.0 achieved a remarkable galena recovery of 94.23 %, significantly outperforming single collectors. This synergistic effect was further validated through bench-scale flotation of lead–zinc sulfide ores. Wettability results indicated that the mixed DTC/BEAT scheme induced superior hydrophobicity on galena surfaces compared to either single collector. Zeta potential, FTIR and XPS spectra verified the co-adsorption of both DTC and BEAT collectors onto the galena surface. The findings provide an effective strategy for improving galena flotation efficiency in mineral processing.
✓ 已验证
产品关联
DOI
高影响因子
FUEL
·
2024
·
IF 6.7
Gongcheng Sun,Wan Chen,Yaoying Li,Subing Fan,Junmin Lv,Tiansheng Zhao
The hydroformylation reaction is very important in industry. However, the leaching of the noble metal Rhodium (Rh) and the separation of homogeneous catalyst have always been difficult problems to solve. And even heterogeneous Rh-base catalyst was developed to solve the separation problem, the serious Rh losing is still hard to avoid. In this work, heterogeneous encapsulated Rh@NaX was prepared by using one-step synthesis method and used as catalyst without reduction in 1-hexene hydroformylation reaction. Rh@NaX catalyst exhibited outstanding catalytic performance. When directly complexed with ligand triphenylphosphine (PPh 3 ), it achieved high heptanal yield of 97.53 %, high n/i ratio of 2.59 and high TOF of 6588 h −1 . Interestingly, encapsulated catalyst exhibited higher recycling stability and much lower Rh leaching compared to impregnated catalyst. In addition, in situ XPS and DRIFT analyses were conducted to elucidate the reduction process of Rh and the reaction pathway.
研究领域:
催化
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化学工程
·
材料科学
✓ 已验证
DOI
高影响因子
CATALYSIS TODAY
·
2022
·
IF 6.562
Zhuangqing Wang,Xinchao Wang,Chao Zhang,Yinze Yang,Leilei Zhou,Haiyang Cheng,Fengyu Zhao
Catalytic conversion of furfural and its derivatives to value-added C 5 molecules has attractive much attention in the field of biomass conversion . In this paper, the selective hydrogenolysis of tetrahydrofurfuryl alcohol to 1,5-pentanediol has been studied over a series of PrO x promoted Ni/Al 2 O 3 catalysts. The catalytic performances and the promoting effects of PrO x , as well as the role of Ni and PrO x species have been discussed. The surface properties and structure of catalysts were examined by TEM, XRD, XPS, H 2 -TPR, H 2 -TPD, in-situ DRIFTS, etc. The presence of PrO x species promotes the reaction rate and changes product selectivity significantly, and a 79.2% 1,5-pentanediol selectivity can be obtained at 88.4% conversion over the NiPr 1.2 /Al 2 O 3 catalyst. The synergistic effect between defect-rich PrO x and the adjacent active Ni species has been confirmed to contribute to the superior catalytic performances. These results provide useful knowledge for the activation of cyclic ether bonds and the design of heterogeneous catalysts with lanthanide oxide supports.
研究领域:
催化
·
生物质转化
·
化学工程
·
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）