APPLIED CATALYSIS B-ENVIRONMENTAL
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2025
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IF 21.1
Xu Liu,Yuheng Zhao,Jun Ma,Yimo Zhang,Hui Zhang,Zhongqing Liu,Yuefeng Liu
The catalytic oxidation of H 2 S into element sulfur using nanocarbon materials is an effective means to solve environmental pollution and realize resource utilization of sulfur. Defect engineering and heteroatom doping are effective strategies for tuning the electronic structure of carbon materials to enhance their catalytic performance. Therefore, rationally exploiting the synergistic effects between defects and heteroatom sites, and elucidating the underlying catalytic mechanisms are essential for the development of high-performance carbon-based catalysts. In this study, we design and synthesize a series of N-doped carbon catalysts containing structural defects, which exhibit significantly enhanced desulfurization performance. Experimental results demonstrate that the NDC-700 catalyst exhibits excellent catalytic activity (95.0% H 2 S conversion and 94.4% S selectivity at 190 °C) and stability (>80 h) while maintaining high performance with high O 2 partial pressures and in the presence of impurity gases such as steam, CO 2 , and CO under mild conditions in continuous mode (≤ 200 °C). XPS analysis, kinetic studies, and oxygen activation experiments reveal that the catalytic performance improves with increasing defect density, despite a decrease in pyridinic N content. DFT calculations further indicate that defect structures substantially alter the local charge distribution around pyridinic N sites, promoting the adsorption and activation of H 2 S and O 2 , ultimately improving catalytic performance. This study elucidates the synergistic interaction between defects and N sites, and further confirms the critical role of defects in enhancing the catalytic function of N-doped carbon materials.
研究领域:
环境催化
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材料科学
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化学工程
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纳米技术
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表面科学
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产品关联
DOI
高影响因子
CATALYSIS LETTERS
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2025
·Vol. 155
·期 10
·1-13
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IF 2.4
Chen Shiqi,Huang Zhixuan,He Wentao,Wang Xinyu,Yang Zhiwei,Zhang Jing
Molybdenum nitride, because of the strong metal-support interaction between nitrogen and the metal, exhibits activity superior to that of bare metals, demonstrating its effectiveness as a co-catalyst to address the slow kinetics of the iron reduction in the Fenton process. Here, we introduced Mo 2 N as a co-catalyst to accelerate the cycles of Fe 3+ /Fe 2+ within a Fenton-like system consisting of Fe 3+ and H 2 O 2 , thereby enhancing the activation of hydrogen peroxide to generate reactive oxygen species (ROS). The system demonstrates excellent recyclability and stability. XPS spectroscopic analyses reveal that Mo(III) and Mo(IV) species on the Mo 2 N surface are capable of reducing free Fe(III), while FTIR analyses show nitrogen (N) and nitrogen oxide (NO x ) facilitate the adsorption and coordination of iron. Both homogeneous and heterogeneous reduced iron species are active in the activation of H 2 O 2 . EPR spectroscopy further confirms that the primary ROS generated are hydroxyl radicals (·OH) and superoxide anions (·O 2 − ). This study not only underscores the feasibility of Mo 2 N-based Fenton-like systems but also provides a new strategy for promoting the practical application of Fenton chemistry. Graphical
研究领域:
环境化学
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催化
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材料科学
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物理化学
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分析化学
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产品关联
DOI
高影响因子
RSC Advances
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2018
·Vol. 8
·期 11
·5661-5669
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IF 2.936
Xun Zhu,Hao Feng,Rong Chen,Qiang Liao,Dingding Ye,Biao Zhang,Jian Liu,Ming Liu,Gang Chen
As a promising technique for multiphase catalytic reactions, the widespread applications of gas–liquid–solid microreactors are still limited by poor durability. Hence, in this work, a method for the preparation of Pd nanocatalysts inside a gas–liquid–solid microreactor was proposed to realize long-term durability using electroless deposition on the polydopamine functionalized surface followed by hydrogen reduction. This method not only increases the utilization efficiency of the Pd ions but also improves the durability of the microreactor. The chemical composition and topography characterization of the fabricated catalyst layer were tested using XPS and FESEM, respectively. The results indicated that the incorporation of hydrogen reduction resulted in nearly all palladium ions being reduced and the palladium nanoparticles were dispersed uniformly on the polydopamine modified surface. The microreactor prepared by this method exhibited high durability and high nitrobenzene conversion as compared to the traditional electroless catalyst deposition. Besides, it was shown that the increased inlet nitrobenzene concentration and flow rates played a negative role in the durability. The longer microreactor exhibited a better durability.
研究领域:
化学工程
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催化
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材料科学
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产品关联
DOI
PubMed
高影响因子
RSC Advances
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2019
·Vol. 9
·期 23
·13234-13242
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IF 3.049
Peidong Li,Qiao Han,Xiaomin Zhang,Yangyang Yuan,Yanfei Zhang,Li Xu,Hongchen Guo,Lei Xu
The effect of the introduced base sites in CsX with alkali oxide modification towards side-chain alkylation of toluene with methanol was systematically investigated in the present work. A series of alkali oxide modified CsX with a base properties (base strength and amount) gradient were prepared by impregnating CsX with alkali metal hydroxide. Here, CsX with different base strengths were selected as the parent zeolite, which is favorable to clarify the different types of base site in the modified CsX. The base properties of the samples were elucidated based on the CO2-TPD results as well as with characterization by XPS and FT-IR of adsorbed CO2. It was revealed that the base strength of the oxygen atoms with negative charge (Oδ−) in the zeolite framework can be strengthened by the electron donating function of the alkali oxides in the supercage of CsX. Detailed analysis of the correlation between the reaction behaviors of side-chain alkylation reaction and the base properties of the indicated catalysts was carried out. It was found that the dehydrogenation of methanol to formaldehyde step was promoted by the increasing base properties of Oδ− in the CsX framework and that was the main reason for the promotion of the whole side-chain alkylation reaction. However, it was also found that the stronger base properties of the alkali oxide modified CsX would enhance the formation of active hydrogen atoms, which aggravated the unwanted styrene conversion to ethylbenzene.
研究领域:
催化
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化学工程
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材料科学
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产品关联
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
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2025
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IF 6.9
Zhihui Cheng,Xingshi Li,Shuo Jiao,Dongyuan Miao,Xiaojie Yu,Hua Ni,Yuyue Geng,Ming Wang,Yaoguo Huang,Yali Zhang
A novel 3-lauramide propyl ester-4-amino-1,2,4-triazole-5-thione modified polyacrylic acid resin (LmPATT-reD113), comprising a bi-ligand amide-based triazole-thione moiety and a carboxylic acid moiety, was prepared and employed for the effective removal of Cu(II) from wastewater. The adsorption experiments demonstrated that the maximum adsorption capacity of LmPATT-reD113 for Cu (II) was 191.94 mg/g, which was 3.03 times higher than that of the polyacrylic acid resin (D113). LmPATT-reD113 and D113 had penetration times of 200 and 150 min, and equilibrium times of 1000 and 675 min, respectively. Column adsorption results showed LmPATT-reD113 outperformed D113. After four adsorption–desorption cycles, LmPATT-reD113 maintained superior performance with a desorption efficiency of 93.23 %. The adsorption kinetics and thermodynamics showed that LmPATT-reD113 to Cu(II) followed the pseudo-second-order kinetic and Langmuir isotherm models, with Δ H , Δ S , and Δ G values of 24.836 kJ/mol, 102.187 J/(mol·K) and −3.092kJ/mol at 298.15 K, respectively. Moreover, the adsorption mechanism was investigated using X-ray photoelectron spectroscopy (XPS) and density-functional theory (DFT), the results showed that the affinity of LmPATT-reD113 for Cu(II) mainly originated from the formation of five-membered rings by C=S and C–N complexed with Cu(II) and the formation of porous structure by O=C–NH molecules through intermolecular hydrogen bonding to promote the adsorption of copper.
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DOI
高影响因子
WATER RESEARCH
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2025
·
IF 12.4
Wei Hu,Jinyi Chen,Juan Zhang
In this study, due to its large surface area and strong metal chelation ability, graphene oxide (GO) and polyethyleneimine (PEI) are used as organic modifiers to functionalize inert phosphogypsum (PG) to prepare PG@GO@PEI adsorbent for effective removal of heavy metals and dyes from wastewater. The preparation of the adsorbent involved functionalizing PG with GO, followed by grafting PEI. The altered material was characterized through several methods, such as Fourier-transform infrared spectroscopy (FTIR), Scanning electron microscopy (SEM) and Patterns of powder X-ray diffraction (PXRD), to confirm successful grafting and improved surface properties. The prepared PG@GO@PEI adsorbent exhibits excellent adsorption performance for heavy metals and dyes, with removal rates close to 100%. The maximum adsorption capacity for Cr (VI) is 313.5 mg·g −1 , whereas the maximum adsorption capacities for naphthol green B (NGB) and malachite green (MG) are 425.5 mg·g −1 and 3300.9 mg·g −1 , respectively. XPS analysis revealed that Cr(VI) adsorption involved electrostatic interaction, ion exchange and chelation, while for NGB and MG adsorption, it could include electrostatic interaction, π-π interaction, and hydrogen bonding interaction. The results demonstrated that the PEI-grafted GO modification markedly improved the adsorption capacity of PG. Furthermore, an assessment using the GAPI, Complex GAPI, AGREE, and AGREEprep metrics tools demonstrates greenness of the established method and environmental sustainability. This study develop the new approach for waste PG resource utilization, alleviating the problem of environmental pollution caused by long-time storage of PG. This study also demonstrates the potential of PG@GO@PEI as a sustainable and effective adsorbent for wastewater treatment, contributing to the development of green technologies for environmental remediation.
研究领域:
环境科学
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材料科学
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化学工程
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纳米技术
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水污染控制
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产品关联
DOI
PubMed
高影响因子
Journal of Environmental Chemical Engineering
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2025
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IF 7.2
Zhengyong Song,Shuming Wen,Qian Zhang,Zhihao Shen,Guang Han,Qicheng Feng
Combined collectors are widely used in mineral flotation. However, in the field of copper oxide mineral flotation, theoretical research on combined collectors is relatively scarce, especially the combination of chelating agents and xanthates. Herein, this study systematically investigated the flotation performance and related potential adsorption chemical essence of sodium butyl xanthate (SBX), 2-mercaptobenzothiazole (MBT), and their combined collectors on sulfidized azurite. Micro-flotation results demonstrated that the low-dosage combination collector system of SBX/MBT can effectively improve the flotation recovery of sulfidized azurite. Surface tension results indicated that the combined collectors had higher surface activity than the single collector, thus exhibiting better foam stability. LEIS, SEM-EDS and contact angles analysis demonstrated that compared with single collector, the combined collectors could adsorb more uniformly on the surface of sulfidized azurite, effectively improving its hydrophobicity. ToF-SIMS and XPS further demonstrated that MBT adsorbed on azurite by bonding its S and N atoms with Cu atoms of sulfidized azurite to form the surface MBT-Cu complexes. Combined with the results of adsorption capacity tests, further analysis indicated that the combined collectors of SBX and MBT may have achieved co-adsorption by forming a mixed-ligand complex on the surface of sulfidized azurite, which enhanced the adsorption density and stability of the collector on the surface of sulfidized azurite.
研究领域:
矿物加工
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表面化学
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浮选化学
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材料科学
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分析化学
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产品关联
DOI
高影响因子
SOLID STATE IONICS
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2023
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IF 3.2
Peng Wei,Yang Sui,Bensheng Zhu,Xiaoyu Meng,Qiong Zhou
Due to its adaptable performance and industrial manufacturing, sulfonated poly ether ether ketone (SPEEK) is suitable for proton exchange membrane (PEM). Organica-inorganic composite membrane was suggested as a way to further enhance its performance. By combining different weights of titanium (IV) oxide acetylacetonate (TiOacac) with polyacrylonitrile (PAN), a PAN/TiOacac solution was created that could then be used to create PAN/TiOacac nanofiber . After the nanofiber has been calcined, TNT-10, TNT-30, and TNT-50 can be produced. Following the incorporation of these three types of TNT into the SPEEK matrix, the solution-casting approach allowed for the simple development of the TNT/SPEEK membrane. The composite membrane of 1%TNT-10/SPEEK and 1%TNT-50/SPEEK was discontinuous and inefficient due to the loose and abundant titanium dioxide in TNT-10 and TNT-50, respectively. While it was compact for TNT-30 with premium performance, so 1%TNT-30/SPEEK would form continuous proton transport channels in PEM and have an interaction between TNT-30 and SPEEK matrix, which was confirmed by FTIR , TEM and XPS. To create a high-performance PEM, it is necessary to develop a continuous proton transport channel.
研究领域:
材料科学
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化学工程
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纳米技术
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2021
·
IF 13.273
Hao Liu,Jianjun Chen,Ya Wang,Shangchao Xiong,Ziang Su,Yun Wang,Wenhao Yang,Xuefeng Chu,Weinan Yang,Yue Peng,Wenzhe Si,Junhua Li
A series of Sm-doped Co 3 O 4 catalysts for the N 2 O direct catalytic decomposition were synthesized by the sol–gel method using citric acid as a chelating agent and urea as a combustion agent. The doping of Sm significantly altered the activity of N 2 O decomposition on the Co 3 O 4 catalyst. Sm was incorporated into the Co 3 O 4 matrix, leading to the distortion of Co 3 O 4 lattice with the spinel configuration maintained. Sm-doping can effectively promote the oxygen vacancy generation, and the electron interaction between Co and Sm species occurred as the Co 3+ + Sm 2+ ↔ Co 2+ + Sm 3+ redox cycle. Combined with in situ Raman and in situ NAP-XPS results proposed that this redox cycle is the main reason that the Sm-doping accelerates the high-efficiency N 2 O decomposition.
研究领域:
催化
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材料科学
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环境化学
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DOI
高影响因子
CORROSION SCIENCE
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2019
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IF 6.355
Yunxing Pan,Shengli Cheng,Hang Dong,Nan Li,Feng Bao,Jinyan Wang,Xigao Jian
A novel oxidation resistant thermoset polymer (MSCB) with excellent thermo-oxidative stability and good solubility was designed and synthesized. To prevent C/C composites from oxidation, a series of MSCB polymer-based coatings were prepared by precursor infiltration and thermal-curing at 300 ℃. The oxidation behaviour of the MSCB-, MSCB/TiO 2 -, MSCB/ZrO 2 - and MSCB/SiC-coated C/C composites was studied. The improved oxidation resistance of the C/C composites was attributed to the good adhesion of the coatings and the formation of a borosilicate protective layer on the surface of the coatings, which was confirmed by the results of TGA, SEM, XPS, and XRD analyses.
研究领域:
材料科学
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聚合物化学
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复合材料
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表面工程
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产品关联
DOI
高影响因子
APPLIED CLAY SCIENCE
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2020
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IF 4.605
Yaowu Cao,Qinghai Guo,Mengsi Liang,Weihao Sun
Antimony enrichment in aquatic environments is of great concern to international community. High-temperature geothermal waters usually contain excessive Sb, which are apt to contaminate the groundwaters or surface waters used as drinking waters in and around a hydrothermal area. However, Sb removal from geothermal water is rarely documented and the effect of high temperature on Sb removal has not received much attention. In this study, batch sorption experiments were conducted to investigate Sb removal from water by a hydroxyl-intercalated, mechanochemically synthesized Mg-Fe-LDH (i.e. Mg-Fe-OH-LDH) capable of avoiding secondary pollutions commonly related to other Mg-Fe-LDH intercalated by undesirable anions, such as Cl − and NO 3 − . The sorption capacities of Mg-Fe-OH-LDH for Sb(III) and Sb(V) were up to 48.7 and 30.0 mg/g, respectively. Notably, Mg-Fe-OH-LDH performed even better in removing aqueous Sb(V) at higher temperatures, superior to sorption of Sb by iron oxides that is generally exothermic and tends to be inhibited by increasing reaction temperature. The removal of Sb(V) existing as Sb(OH) 6 − by Mg-Fe-OH-LDH was attributable to its exchange with interlayer hydroxyl, and therefore could be impaired to some degree by coexisting anions with stronger electronegativity or smaller ionic radii . In contrast, anion exchange didn't contribute so much to Sb(III) sorption, because the main Sb(III) species at pH < 10 is neutral Sb(OH) 3 . XPS analyses confirmed that inner-sphere complexation between sorbed Sb(III) and Fe on Mg-Fe-OH-LDH layers was formed, which was hardly affected by competitive anions. Mg-Fe-OH-LDH is promising to be practically applied in removing both Sb(III) and Sb(V) from contaminated natural waters, wastewaters, or geothermal waters potentially acting as a pollution source .
研究领域:
环境科学
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水处理
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地球化学
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材料科学
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产品关联
DOI
高影响因子
ADVANCED POWDER TECHNOLOGY
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2023
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IF 5.2
Da Li,Jian Liu,Hulin Gao,Jiamei Hao,Yunlong Yu
The unavoidable presence of ionic substances in the ore pulp can adversely effects on the separation of pyrite from other valuable metal sulfide ores. Developing new reagents to eliminate this effect is of great significance. In this study, a novel approach was proposed to depress pyrite by utilizing sodium trithiocarbonate (Na 2 CS 3 ) as a depressant in the lime-CuSO 4 system. The results of the micro-flotation experiments showed that a low dosage of Na 2 CS 3 in the lime-CuSO 4 system could effectively depress pyrite. The presence of CuSO 4 in the solution which improves the ability of BX to adsorb on the surface of the pyrite was also revealed by the analysis of LEIS, UV–Vis, and contact angle, while the addition of Na 2 CS 3 effectively hindered the adsorption of BX. XPS and SEM-EDS analysis results showed that Na 2 CS 3 forms a complex with Cu 2+ and adsorbs onto the pyrite surface, thereby impeding the adsorption of the collector and effectively depressing pyrite.
研究领域:
矿物加工
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化学工程
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材料科学
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DOI
高影响因子
危险品化学品经营许可证（带存储）