DALTON TRANSACTIONS
·
2021
·Vol. 50
·期 26
·9076-9087
·
IF 4.39
Yu Qiao,Na Lv,Dong Li,Hongji Li,Xiangxin Xue,Wei Jiang,Zhanlin Xu,Guangbo Che
Metastable Cu2O is an attractive material for the architectural design of integrated nanomaterials. In this context, Cu2O was used as the sacrificial agent to form the core–shell structure of Cu2O@HKUST-1 by in situ growth technology. The MOFs with BOPs adsorption property were gathered together by a Cu2O etching method, and the hollow structure of the HKUST-1 shell material with fast BOP adsorption was successfully constructed. The adsorption experiments showed that the HKUST-1 shell has a good adsorption effect on nitrobenzene pollutants in wastewater. The investigation of various factors affecting the adsorption, thermodynamic and kinetic equations was carried out. The adsorption equilibrium was reached within 30 min, and the maximum adsorption capacity was 94.67 mg g−1 at 298 K. The adsorption capacity of nitrobenzene by the HKUST-1 shell is in good agreement with the Freundlich model and the second-order kinetic model. The possible mechanism of adsorption of nitrobenzene by the HKUST-1 shell was discussed. The experimental results suggested that Cu-BTC materials have potential applications for wastewater treatment involving benzene pollutants.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Jian Deng,Chunhao Wang,Shenggui Ma,Chengchao Liu,Yongtao Zheng,Haipeng Chen,Ruofei Chen,Siyu Wei,Shanbi Peng,Xia Jiang
In this study, Cu 1.5 Mn 1.5 O 4 spinel with Mn(Ⅳ)O 6 coordination was synthesized by evaporation and combustion method. CuMn-500-1 catalyst was obtained by acid etching, which significantly promotes the catalytic oxidation of toluene (lowering ≈ 30℃ regarding T 100 ). Characterization results demonstrate that the enhanced performance can be attributed to the increased exposure of (222) crystal facet of a more rod-like Cu 1.5 Mn 1.5 O 4 spinel, independent of surface area and oxygen vacancy (which remained almost unchanged). In addition, the rate-determining steps were proved to be the ring-opening reaction of phenol by in-situ DRIFTS experiment. Density functional theory calculation further shows that the Mn(Ⅳ)O₆ site exhibits stronger capacity for toluene adsorption. In addition, the main cause underlying the enhanced performance of CuMn-500-1 is further corroborated: specifically, the (222) crystal surface demonstrates stronger catalytic performance compared to other crystal faces. This strategy provides a new method in enhancing the VOCs removal efficiency of catalyst.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Xiaoqian Li,Dechao Wang,Zhongjie He,Fangfang Su,Nan Zhang,Yangyang Xin,Hongni Wang,Xiaolu Tian,Yaping Zheng,Dongdong Yao,Mingtao Li
Porous liquids (PLs) as a novel class of materials combine the permanent porosity of microporous solids, the rapid mass transfer of liquids, and fluidity, thus exhibiting extraordinary promise for gas capture and separation. However, the practical application of PLs was severely restricted by their undesirable relative high viscosity and melting temperature. In this work, the symmetric dicationic ionic liquids [C 6 BIm 2 ][NTf 2 ] 2 was synthesized as a steric hindrance solvent to construct a type of low viscosity zeolitic imidazolate frameworks (ZIFs)-based PLs. Specifically, the ZIF-67-PLs-2 ( i.e. , ZIF-67 loading of 2.0% in PLs) presented a low viscosity with 543.4 mPa·S at 25 °C, which was about 20 times lower than that of type III PLs reported previously. Meanwhile, ZIF-67-PLs showed long-term stability even over 180 days and broke the fluidity limitation down to −64 °C, broadening the work conditions. Moreover, ZIF-67-PLs-10 ( i.e. , ZIF-67 loading of 10.0% in PLs) achieved 55 times CO 2 and 7 times toluene adsorption capacity more than those of the corresponding pure DILs, respectively. Remarkably, the fascinating features of ZIF-67-PLs including lower viscosity, wide liquid range and higher adsorption pave a new way for the optimal design of novel PLs towards gas uptake and separation.
研究领域:
材料科学
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化学工程
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产品关联
DOI
高影响因子
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
·
2024
·
IF 5.9
Hongliang Sheng,Xiaoben Zhao,Shuainan Wang,Tao He,Jinfeng Zhang,Song He,Yajun Huang
In this paper, we investigated the properties of nitrogen-doped activated carbon produced via the co-activation of KSCN and KOH, using hydrothermal lignin as a precursor. The resulting activated carbon exhibited a high specific surface area of 3504 m 2 /g and contained 3.37 % nitrogen from KSCN, which enhanced its adsorption efficiency. The adsorption capacities for SO 2 and benzene at 273 K were measured at 2260.68 mg/g and 1668.90 mg/g, respectively. Competitive adsorption experiments at 298 K showed that in the presence of SO 2 , the activated carbon maintained a high adsorption capacity for benzene at 1008.81 mg/g, while the adsorption capacity for SO 2 decreased to only 12.31 mg/g, indicating a higher affinity for benzene. The selectivity coefficient, calculated using the Ideal Adsorbed Solution Theory (IAST), reached 44.76 at a benzene-to-SO 2 ratio of 2:1. To gain deeper insights into the selective adsorption mechanism, Density Functional Theory (DFT) simulations were conducted. These simulations confirmed the experimental findings, indicating that benzene can be selectively adsorbed and effectively separated from SO 2 flue gas.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2021
·
IF 10.588
Zehui Li,Yi Yuan,Hao Wu,Xinghui Li,Menglei Yuan,Huaizhang Wang,Xiaoxue Wu,Shuai Liu,Xianming Zheng,Mingjun Kim,Haoyun Zheng,Sadia Rehman,Guangya Jiang,Wangyang Fu,Jingkun Jiang
Carbon frameworks (CFs) derived from metal-organic frameworks (MOFs) have been produced as adsorbents of toluene. To further obtain optimum hierarchical porous carbon structure of CFs, different treatment temperatures were applied to a typical kind of MOFs (ZIF-8). The adsorption capacity of the toluene of hierarchical porous CFs obtained from ZIF-8 under 1100 °C (CF-1100, adsorption capacity of 208.5 mg/g) was higher than that of other carbonization temperature and MOFs. Impressively, the adsorbent CF-1100 also exhibited strong hydrophobicity , low desorption temperature, and good selectivity to toluene. The adsorption capacity decreased by only 10.4% under wet condition compared with the dry condition, standing on the top of the recently reported adsorbents. The impressive adsorption performance of CF-1100 is attributed to the larger specific surface area (1024 m 2 /g) and pore volume (0.497 cm 3 /g), newly generated micropores (pore width is 0.6–0.8 nm) and mesopores (pore width above 10 nm), and carbonaceous structure with higher degree of graphitization . Based on the adequate adsorption performance, CF-1100 coated quartz crystal microbalances as sensor also showed a high sensitivity of 0.4004 Hz/ppm and small relative standard deviations of 1.0745% for toluene sensing. This contribution provides a foundation for optimizing potential adsorbents and sensing materials for air pollution abatement.
研究领域:
材料科学
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环境科学
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产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Zhipeng Qie,Zhaoqi Ji,Huan Xiang,Xinhan Zhang,Abdullah Alhelali,Lan Lan,Hassan Alhassawi,Guangbo Zhao,Xiaoxia Ou,Xiaolei Fan
Adsorption capacity of zeolitic adsorbents for organic pollutants can be affected severely under humid conditions and/or in aqueous systems. This study presents the development of hydrophobic Beta zeolites using a microwave-assisted post-synthetic treatment method (i.e., microwave-assisted chelation, MWAC) for adsorption removal of organics (benzene and phenol as the models) in aqueous systems. MWAC treatment enabled the dealumination of Beta zeolites in only one minute whilst increasing its hydrophobicity. Based on the characterization data, the mechanism for the hydrophobization of Beta zeolite was proposed. The influence of hydrophobicity, porosity and the property of organic molecules on adsorption behaviours were systematically studied, showing that the most hydrophobic Beta zeolite presented the highest benzene adsorption capacity per surface area of 2.87 × 10 −3 mmol/m 2 (at 1.0 g/L initial concentration). TGA and multi-cycle regeneration/adsorption experiments were employed to assess the regeneration and reusability of the adsorbents, and the results suggested that the modified Beta zeolites could be regenerated easily with the preserved physiochemical properties and adsorption capacity. The developed method and the associated zeolitic materials could be developed further for making high-performance hydrophobic zeolitic adsorbents for applications in organics removal from aqueous media.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
ENVIRONMENTAL POLLUTION
·
2023
·
IF 8.9
Haiqian Zhao,Ziyu Tang,Zhonghua Wang,Jun Li,Zhipei Hu,Qingshu Wang,Qi Yu,Xing Zhang,Bo Zhou,Erlin Meng
Investigating the impact of nitrogen doping on the selective adsorption of benzene on activated carbon under aqueous conditions holds significant importance in regulating nitrogen content on activated carbon precisely and enhancing benzene adsorption in the air. This study utilizes quantum chemical simulation to systematically compute the pairwise interactions of pyridine nitrogen, pyrrole nitrogen, graphite nitrogen, and their coexistence on carbon materials, including electrostatic potential, van der Waals potential, and polarity changes. We examine the adsorption of benzene and water on nitrogen-doped carbon materials and calculate the type and proportion of weak interactions in the adsorption process through energy decomposition analysis. Visual analysis of weak interactions is conducted via independent gradient scatter plots and isosurface plots. Based on this research, we investigate the influence of nitrogen doping on the competitive adsorption of benzene and water on carbon materials using adsorption energy and configuration changes. Our findings reveal that nitrogen doping disrupts the uniform electrostatic potential distribution and polarity of carbon materials. Specifically, graphite nitrogen inhibits water molecule adsorption by enhancing mutual repulsion and weakening dispersion and electrostatic interactions, consequently promoting benzene adsorption on carbon materials. Moreover, hydrogen bonds form between pyridine nitrogen, pyrrole nitrogen, and water, making carbon materials more hydrophilic. However, when combined with graphite nitrogen, this increases the negative van der Waals potential of carbon materials, further enhancing benzene adsorption. Experimental results align with the simulation, reinforcing the significance of this research in developing efficient activated carbon adsorbents for benzene under aqueous conditions.
研究领域:
材料科学
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环境科学
·
化学工程
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产品关联
DOI
高影响因子
MOLECULES
·
2024
·Vol. 29
·期 24
·5931
·
IF 4.2
Jingxin Wang,Xiaohong Wang,Xiaoping Lin,Ziyi Yu,Davide Vione,Haomin Huang,Xiaohong Zhang,Yanhong Zhang,Jiaqi He,Yun Xia,Hansun Fang
Porous activated carbons (AC-AN and AC-AO) for toluene adsorption were prepared starting from brewer’s grain biomass pretreated with microorganisms (Aspergillus nigervan Tieghem for AC-AN andAspergillus oryzaeRIB40 for AC-AO). The structures and chemical properties of the three activated carbon materials (AC-AN, AC-AO, and AC that was not pretreated with microorganisms) were characterized by N2adsorption–desorption isotherms, scanning electron microscopy (SEM), transmission electron microscopy (TEM), Fourier-transform infrared spectroscopy (FTIR), Raman spectroscopy, X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS). The adsorption behavior of the three activated carbons for toluene was studied and correlated with the physical and chemical properties of these materials. The results suggested that the activated carbons prepared by microbial pretreatment had a rougher morphology, higher specific surface area, richer pore structure, fewer oxygen-containing functional groups on the surface, and better adsorption performance for toluene (increased by 31.5% and 18.3% with AC-AN and AC-AO, respectively) compared with the untreated activated carbon (AC). The Thomas model was used to fit the toluene adsorption data, indicating that the rich pore structure accelerated the kinetic process of toluene adsorption. Therefore, appropriate microbial pretreatment of the feedstock that is used to prepare activated carbon can effectively improve its adsorption capacity towards toluene.
研究领域:
环境科学
·
材料科学
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DOI
PubMed
高影响因子
ACS Omega
·
2020
·
IF 2.87
Bowen Li,He Xiong,Yang Xiao,Juncheng Hu,Xin Zhang,Li Li,Ruoheng Wang
Porous carbons (PCS) derived from sodium lignin sulfonate were activated by four common metal salts. The samples exhibit distinct characteristics of irregular, sunflower-like, interconnected sheet, and tine block morphologies under the impact of NaCl, CaCl2, ZnCl2, and FeCl3, respectively (PCS-MClx). Surprisingly, the maximum and minimum specific surface areas are 1524 and 44 m2/g corresponding to PCS-ZnCl2 and PCS-NaCl. All of the samples have plentiful functional groups; herein, PCS-NaCl and PCS-FeCl3 are detected with the highest O and S contents (11.85, 1.08%), respectively, which signifies sufficient active sites for adsorption. These porous materials were applied in toluene adsorption from paraffin liquid and matched the Langmuir isotherm models well. Thus, the activation mechanism was discussed in detail. PCS-MClx has a completely different pyrolysis behavior according to thermogravimetry/derivative thermogravimetry (TG/DTG) analysis. It is speculated that H[ZnCl2(OH)] would have an etching effect on the carbon structure of PCS-ZnCl2, and HCl or H2SO4, resulting from FeCl3 hydrolysis and a reduction reaction, would be corrosive to the sodium lignin sulfonate (SLS) surface. Each metal salt plays a different role in activation. The devised method for the synthesis of porous carbons is green and economical, which is suited to mass production.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
PubMed
高影响因子
Biomass Conversion and Biorefinery
·
2024
·
IF 3.5
Wang Shuainan,Sheng Hongliang,Zhao Xiaoben,He Tao,Huang Yajun,He Song
The present investigation involved the preparation of N-doped high-specific surface porous activated carbon from lignin through hydrothermal carbonization, polymer premixing, and KOH activation. We looked at how the characteristics of lignin-based activated carbon were affected by the addition of polypyrrole and the alkali ratio. The addition of polymer polypyrrole as an N dopant during the activation process with KOH resulted in the N-doped biomass-based activated carbon with a greater pore size range, specific surface area, and pore volume, while also further encouraging the pore creation. Under the optimal preparation conditions, specifically hydrothermal treatment at 473 K and activation at 1073 K for 1 h, with a mass ratio of activator to carbon precursor of 4:1, the resulting activated carbon exhibited the highest BET surface area of 3415 m 2 /g and a total pore volume of 2.81 cm 3 /g. The various characteristics of activated carbon are examined using N 2 adsorption/desorption, scanning electron microscopy (SEM), elemental analysis (EA), X-ray photoelectron spectroscopy (XPS), and Fourier transform infrared spectroscopy (FTIR). Comparing this sample to other adsorbents, it was found that the material had a greater capacity for adsorbing gaseous benzene and NO. In static adsorption tests, the saturated adsorption of gaseous benzene reached 3338.75 and 2297.69 mg/g at 273 and 298 K, respectively, while the adsorption of NO reached 560.76 and 226.99 mg/g. Adsorption isotherms were used to analyze the experimental results, which were then fitted, examined, and assessed to look into the adsorption mechanism. The outcomes demonstrated the good adsorption performance of this sample as well as its promising and useful application potential in the removal of gaseous benzene and NO. Graphical
研究领域:
材料科学
·
环境科学
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产品关联
DOI
高影响因子
APPLIED CLAY SCIENCE
·
2017
·
IF 3.101
Jianxi Zhu,Ping Zhang,Yuebo Wang,Ke Wen,Xiaoli Su,Runliang Zhu,Hongping He,Yunfei Xi
In this paper, acid-activated palygorskite (APal x ) samples were prepared by a facile acid treatment method with different concentrations of HCl (0.5, 1, 3, 5 and 7 mol/L). The dynamic toluene adsorption performances of APal x were evaluated and the relevant adsorption mechanism was discussed. The prepared adsorbents were characterized using X-ray diffraction (XRD), elemental analysis, transmission electron microcopy (TEM), nitrogen adsorption-desorption isotherms and Fourier-transform infrared spectroscopy (FTIR). The results show that the palygorskite has a good resistant ability to acid attack, the structure still remains when the acid concentration is as high as 7 mol/L. Acid activation could significantly enhance the surface area (228, 250, 271, 273, 329 and 308 for Pal, APal0.5, APal1, APal3, APal5 and APal7, respectively) and porosity of palygorskite. APal5 has the best toluene adsorption capacity (90.4 mg/g) due to its highest S BET (329 m 2 /g) and V micro (0.055 cm 3 /g). The adsorption performance in terms of dynamic toluene adsorption capacities follows the order of Pal (44.6 mg/g) < APal0.5 (63.5 mg/g) < APal1 (71.3 mg/g) < APal7 (74.2 mg/g) < APal3 (75.1 mg/g) < APal5 (90.4 mg/g). APal5 can be readily regenerated by thermal desorption and has exhibited steady reproducibility after 6 cycles. These results have demonstrated that acid activation is a feasible and effective method for the structure and surface optimizing of palygorskite, enabling the APal x to become a promising candidate for the adsorption of volatile organic compounds in practical applications.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2020
·
IF 5.065
Xiaoyu Shi,Xiaodong Zhang,Fukun Bi,Zenghui Zheng,Lijun Sheng,Jingcheng Xu,Zhong Wang,Yiqiong Yang
In this thesis, defective UiO-66-NH 2 using cetyltrimethylammonium bromide (CTAB) as a template was successfully synthesized. The toluene adsorption-desorption properties were studied using breakthrough experiments and temperature programmed desorption (TPD). Modified UiO-66-NH 2 showed a high toluene increase due to the increased specific surface area and total pore volume and extra accessible adsorption sites generated by defects. Additionally, adsorption mechanisms were discussed at micro and molecule levels in light of density functional theory (DFT) calculations. By calculation, the amino hydrogen bonding gave rise to a higher toluene adsorption over UiO-66-NH 2 . In terms of the modified UiO-66-NH 2 with the most deficiencies, synergistic effects among π-π, -NH 2 , OH-CH 3 and OH-π hydrogen bonding strength also significantly intensified toluene adsorption. Furthermore, it could be noted that the OH-π interaction was stronger than the two bonded μ 3 -OH mechanisms. Notably, TPD and binding energies (BEs) depicted that defective UiO-66-NH 2 had a weaker toluene affinity than did UiO-66-NH 2 . Thus, gas toluene was easy to desorb with defective UiO-66-NH 2 at 298 K under atmospheric pressure. Finally, the repetitive regeneration experiment showed that the reproducibility of the materials was excellent.
研究领域:
材料科学
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环境科学
·
计算化学
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DOI
高影响因子
危险品化学品经营许可证（带存储）