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学者姓名：胡晖
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Abstract ：
Rhenium is a key metal in high technology. It is important how to effectively and selectively recover perrhenate from copper smelting acidic effluent. A CH3COOK activated hierarchical biochar from bamboo shoot shell was prepared to efficiently and selectively adsorb perrhenate in the acidic solution. Some adsorption experiment factors such as initial pH, adsorbent dose, contact time, and temperature have been comprehensively tested. The maximum adsorption capacity of the adsorbent for perrhenate reached up to 84.63 mg/g. Spontaneous physical adsorption was possible adsorption mechanism according to thermodynamic analysis. The intensified hydrophobic surface and graphitic defect structure of the adsorbent accounted for its excellent selectivity to hydrophobic perrhenate. Regeneration experiments showed that the CH3COOK activated hierarchical biochar was reusable. The CH3COOK activated hierarchical biochar has the high potency for highly efficient and selective recovery of perrhenate from the acidic solution generated by the copper smelting process.
Keyword ：
Activation Activation Adsorption Adsorption Biochar Biochar Rhenium Rhenium Selectivity Selectivity
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| GB/T 7714 | Hu, Hui , Yu, Sizhuo , Wang, Tian et al. Recovery of rhenium, a strategic metal, from copper smelting effluent [J]. | SEPARATION AND PURIFICATION TECHNOLOGY , 2024 , 337 . |
| MLA | Hu, Hui et al. "Recovery of rhenium, a strategic metal, from copper smelting effluent" . | SEPARATION AND PURIFICATION TECHNOLOGY 337 (2024) . |
| APA | Hu, Hui , Yu, Sizhuo , Wang, Tian , Lian, Hongyan , Lv, Chenguang . Recovery of rhenium, a strategic metal, from copper smelting effluent . | SEPARATION AND PURIFICATION TECHNOLOGY , 2024 , 337 . |
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BACKGROUNDIn this study, a defective biochar with honeycomb-like porous structure (BC-PH) was successfully prepared by the activation of pristine biochar derived from bamboo shoot shell with the chemical reagent KOH, and was applied to selectively separate ReO4- (a chemical analogue for radioactive TcO4-) from acidic solutions.RESULTSThe diffusion, mass transfer and recovery for ReO4- could be significantly improved by the large specific surface area (SBET, 2412 m2 g-1) and high total volume (Vtot, 1.26 cm3 g-1) of BC-PH. The influence of adsorbent dosage, system pH and coexisting ions with different valence states on the adsorption capability and selectivity of BC-PH toward ReO4- was systematically investigated. BC-PH exhibited high adsorption capacity and selectivity for ReO4- with a maximal sorption capacity (qm) of 73.11 mg g-1 at initial pH 2. By applying an analysis of kinetics and isotherm adsorption studies, the liquid film diffusion was verified to be the primary rate-controlling step for the sorption of ReO4- and the multilayer adsorption process occurred on the heterogeneous surface of BC-PH. Besides, the recovery of ReO4- using BC-PH occurred in an exothermic and spontaneous manner according to thermodynamic analysis. Furthermore, an investigation of the adsorption mechanism suggested that pore filling and electron donor-acceptor interaction were mainly related to the removal of ReO4-.CONCLUSIONThese results suggest that BC-PH has great potential for the application of TcO4- separation in consideration of its high adsorption capacity and selectivity. (c) 2024 Society of Chemical Industry (SCI).
Keyword ：
adsorption adsorption biochar biochar KOH activation KOH activation pertechnetate pertechnetate selectivity selectivity
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| GB/T 7714 | Hu, Hui , Yu, Sizhuo , Wang, Tian et al. Efficient and selective separation of Re(VII), an analogue of Tc(VII), by a defective biochar with honeycomb-like porous structure [J]. | JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY , 2024 , 99 (4) : 946-958 . |
| MLA | Hu, Hui et al. "Efficient and selective separation of Re(VII), an analogue of Tc(VII), by a defective biochar with honeycomb-like porous structure" . | JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY 99 . 4 (2024) : 946-958 . |
| APA | Hu, Hui , Yu, Sizhuo , Wang, Tian , Lv, Chenguang . Efficient and selective separation of Re(VII), an analogue of Tc(VII), by a defective biochar with honeycomb-like porous structure . | JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY , 2024 , 99 (4) , 946-958 . |
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Abstract ：
Au and Zr are uniformly loaded on the surface of TS-1 by coprecipitation method to obtain atomically dispersed Au-Zr binary clusters. The interaction between Au clusters, Zr and TS-1 is analyzed by Independent Gradient Model based on Hirshfeld partition (IGMH), adsorption energy of Au cluster, Mayer bond order. It is found that the existence of Zr is conducive to the stability of nano Au on TS-1 surface. The catalyst is applied to the gas phase epoxidation of C3H6 to obtain 14.06 % initial conversion, 93.93 % initial selectivity and 479.52 gPO center dot kg(cat)(-1)center dot h(-1) initial productivity. It shows good stability in the continuous test for more than 50 h. Density functional theory (DFT) is used to calculate the possible catalytic reaction mechanism on the surface of atomically dispersed Au clusters. The whole process from C3H6 epoxidation reaction to catalyst regeneration is completely described. In the analysis of H2O desorption, the concept of "relay desorption" is proposed. Combined with charge and surface electrostatic potential analysis, the different attack directions of C3H6 on the catalyst surface are dis-cussed in detail. This will provide guidance and help for the synthesis and catalytic application of nano Au catalysts.
Keyword ：
Coprecipitation method Coprecipitation method DFT DFT Interaction of Au Zr and TS-1 Interaction of Au Zr and TS-1 Propylene epoxidation Propylene epoxidation Sub-nano Au-Zr clusters Sub-nano Au-Zr clusters
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| GB/T 7714 | Peng, Jiahui , Li, Bin , Chen, Wenkai et al. Atomically dispersed nano Au clusters stabilized by Zr on the TS-1 surface: Significant enhancement of catalytic oxidation ability using H-2 and O-2 [J]. | APPLIED SURFACE SCIENCE , 2023 , 619 . |
| MLA | Peng, Jiahui et al. "Atomically dispersed nano Au clusters stabilized by Zr on the TS-1 surface: Significant enhancement of catalytic oxidation ability using H-2 and O-2" . | APPLIED SURFACE SCIENCE 619 (2023) . |
| APA | Peng, Jiahui , Li, Bin , Chen, Wenkai , Hu, Hui , Huang, Qingming , Chen, Xiaohui . Atomically dispersed nano Au clusters stabilized by Zr on the TS-1 surface: Significant enhancement of catalytic oxidation ability using H-2 and O-2 . | APPLIED SURFACE SCIENCE , 2023 , 619 . |
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CuZnZrAl catalysts were synthesized by the co-precipitation and coprecipitation-ammonia methods and modified with Y and Ce promoters for the methanol steam reforming hydrogen production process. The physicochemical properties of the catalysts were analyzed by XRD, BET, H2-TPR, and XPS methods. The methanol conversion, as well as CO selectivity of MSR at different temperatures, were investigated, and its stability was probed using repeated start and stop test to simulate the onboard hydrogen production process. The results showed that the methanol conversion of CuZnZrAl catalyst prepared by coprecipitation-ammonia method was 96.9% at a tem-perature of 270 degrees C, S/C molar ratio of 1.2, and WHSV of 2.6 h-1, which was higher than that of 94.6% by the co-precipitation method. In addition, the best catalytic performance was obtained for the catalyst with Ce promoter addition using coprecipitation-ammonia method. The conversion was 100% at 270 degrees C with a CO selectivity of only 0.31%, and the conversion remained 98.7% after 20 reactions were repeated.
Keyword ：
Coprecipitation-ammonia method Coprecipitation-ammonia method CuZnZrAl catalysts CuZnZrAl catalysts Hydrogen Hydrogen Methanol steam reforming Methanol steam reforming
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| GB/T 7714 | Li, Linfeng , Chen, Jiayuan , Zeng, Cuibing et al. Preparation of CuZnZrAl catalysts by coprecipitation-ammonia method for methanol steam reforming and the effect of promoters Y and Ce [J]. | MOLECULAR CATALYSIS , 2023 , 537 . |
| MLA | Li, Linfeng et al. "Preparation of CuZnZrAl catalysts by coprecipitation-ammonia method for methanol steam reforming and the effect of promoters Y and Ce" . | MOLECULAR CATALYSIS 537 (2023) . |
| APA | Li, Linfeng , Chen, Jiayuan , Zeng, Cuibing , Liu, Quan , Hu, Hui , Huang, Qingming et al. Preparation of CuZnZrAl catalysts by coprecipitation-ammonia method for methanol steam reforming and the effect of promoters Y and Ce . | MOLECULAR CATALYSIS , 2023 , 537 . |
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The epoxidation of propylene (C3H6) over TS-1 molecular sieve supported with nano-Au clusters by deposition-precipitation (DP) method has always been the focus of the catalytic field. A quantity of atomically dispersed Au clusters can be synthesized induced by NH3 as an assistant in the DP system. These smaller Au clusters show 14.3% C3H6 conversion, 91.7% propylene oxide (PO) selectivity, 10.6% H-2 efficiency and 477.4 gPO center dot kg(cat)(-1)center dot h(-1) PO productivity in the epoxidation reaction of C3H6. The interaction between NH3 and [AuCl4](-) in aqueous solution is analyzed by means of experiments and Density Functional Theory (DFT), and it is concluded that at least 2 times of NH3 is needed to make Au precipitate completely. Similarly, the mechanism of C3H6 epoxidation catalyzed by Aun (n = 2, 3, 4) clusters in coordination with Ti sites is calculated with the help of DFT. It is believed that the in-situ formation of Ti-OOH structure at Ti sites through H-2 and O-2 is the key to initiate C3H6 epoxidation. The general rules of catalytic mechanism under different size of Au clusters are also analyzed.
Keyword ：
Atomically dispersed Au clusters Atomically dispersed Au clusters Deposition-precipitation method Deposition-precipitation method DFT DFT NH3 induction NH3 induction Propylene epoxidation Propylene epoxidation
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| GB/T 7714 | Peng, Jiahui , Liu, Kexing , Guo, Shujuan et al. Synthesis strategy of atomically dispersed Au clusters induced by NH3 on TS-1: Significantly improve the epoxidation activity of propylene [J]. | CHEMICAL ENGINEERING JOURNAL , 2023 , 472 . |
| MLA | Peng, Jiahui et al. "Synthesis strategy of atomically dispersed Au clusters induced by NH3 on TS-1: Significantly improve the epoxidation activity of propylene" . | CHEMICAL ENGINEERING JOURNAL 472 (2023) . |
| APA | Peng, Jiahui , Liu, Kexing , Guo, Shujuan , Chen, Wenkai , Hu, Hui , Huang, Qingming et al. Synthesis strategy of atomically dispersed Au clusters induced by NH3 on TS-1: Significantly improve the epoxidation activity of propylene . | CHEMICAL ENGINEERING JOURNAL , 2023 , 472 . |
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How to treat uranium-containing wastewater effectively by adsorption and recycle waste adsorbent is an agent problem affecting the sustainable development of nuclear energy. This study successfully developed a superhydrophilic nano-MgO biochar (MBC) for the efficient and selective separation of UO22+ and mineralization recycle of waste MBC. The optimum operating parameters, kinetics, isotherms, thermodynamics and adsorption selectivity of adsorption by MBC, were studied. The adsorption kinetics was well characterized by the Elovich model and the adsorption isotherm was well fitted by the Langmuir-Freundlich model. The adsorption process was spontaneous and endothermic. The selectivity test results showed that MBC had outstanding selectivity and efficiency for UO22+ in high concentration coexisting ion solution. The predominant adsorption mechanism of UO22+ by MBC was MgU2O7 microprecipitation mechanism, and the mineralization recycle of UO22+ is a feasible recovery method for uranium.
Keyword ：
Biochar Biochar MgO MgO Mineralization recycle Mineralization recycle Super-hydrophilic Super-hydrophilic Uranium Uranium
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| GB/T 7714 | Hu, Hui , Gao, Min , Wang, Tian et al. Efficient uranium adsorption and mineralization recycle by nano-MgO biochar with super-hydrophilic surface [J]. | JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING , 2023 , 11 (5) . |
| MLA | Hu, Hui et al. "Efficient uranium adsorption and mineralization recycle by nano-MgO biochar with super-hydrophilic surface" . | JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING 11 . 5 (2023) . |
| APA | Hu, Hui , Gao, Min , Wang, Tian , Jiang, Lei . Efficient uranium adsorption and mineralization recycle by nano-MgO biochar with super-hydrophilic surface . | JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING , 2023 , 11 (5) . |
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本发明公开了一种耐酸性负载纳米γ‑Al2O3生物炭的制备方法与应用。制备过程包括以下步骤：(1)制粒：将洗净、干燥的笋壳粉碎，过筛备用；(2)烘焙：取适量经(1)步骤处理后的笋壳在惰性气氛中进行烘焙，制得烘焙炭；(3)载铝：取适量烘焙炭置于水热釜内胆中，依次加入铝试剂、钾试剂以及乙醇溶液，通过溶剂热法载铝。(4)炭化：取适量的载铝烘焙炭，炭化，使用酸性溶液和去离子水对其进行反复清洗直至中性，制得耐酸性负载纳米γ‑Al2O3生物炭。本发明制备的耐酸性负载纳米γ‑Al2O3生物炭具有优良的耐酸性能，并且通过氢键作用对Re(VII)具有良好的吸附性能。
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| GB/T 7714 | 胡晖 , 张佳源 , 汪湉 . 一种耐酸性负载纳米氧化铝生物炭的制备方法与应用 : CN202111303121.X[P]. | 2021-11-05 00:00:00 . |
| MLA | 胡晖 et al. "一种耐酸性负载纳米氧化铝生物炭的制备方法与应用" : CN202111303121.X. | 2021-11-05 00:00:00 . |
| APA | 胡晖 , 张佳源 , 汪湉 . 一种耐酸性负载纳米氧化铝生物炭的制备方法与应用 : CN202111303121.X. | 2021-11-05 00:00:00 . |
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The pure silicon MWW were synthesized for the first time by means of a dry-gel conversion method utilizing N, N, N-trimethyl-1-adamantyl ammonium hydroxide and hexamethyleneimine as the structural directing agents. A vapor transport assisted crystallization method for obtaining complete crystallinity was developed to replace the traditional dry-gel conversion methods. TiCl4 acid solution treatment was cleverly used for the implantation of titanium in MWW. Compared with Ti-ERB-1, the Ti content of boron-free Ti-MWW is only 20% of the former, the conversion rate of 1-hexene epoxidation is 2.3 times of the former and nearly 100% of H2O2 efficiency.
Keyword ：
1-Hexene epoxidation 1-Hexene epoxidation Atom-planting Atom-planting Boron-free Ti-MWW Boron-free Ti-MWW TOF TOF
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| GB/T 7714 | Ge, Zhijin , Li, Xin'ao , Hu, Hui et al. Synthesis of boron- free titanosilicate zeolite by TiCl4/HCl treatment of pure silicon MWW as an epoxidation catalyst [J]. | JOURNAL OF CATALYSIS , 2023 , 428 . |
| MLA | Ge, Zhijin et al. "Synthesis of boron- free titanosilicate zeolite by TiCl4/HCl treatment of pure silicon MWW as an epoxidation catalyst" . | JOURNAL OF CATALYSIS 428 (2023) . |
| APA | Ge, Zhijin , Li, Xin'ao , Hu, Hui , Huang, Qingming , Chen, Xiaohui . Synthesis of boron- free titanosilicate zeolite by TiCl4/HCl treatment of pure silicon MWW as an epoxidation catalyst . | JOURNAL OF CATALYSIS , 2023 , 428 . |
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The efficient and economic heteroatom-implanting method for MWW-type zeolite has been the focus of attention and needs further exploration. Ti incorporated MWW zeolite was synthesized by sequential treatment of boron-containing zeolite precursor. The catalysts were applied to the epoxidation of 1-hexene. The implanting titanium process was conducted under a mild condition with Ti(SO4)(2)/NH4HF2/HNO3 solution, and the product Ti-MWW precursors have framework titanium alone, the novel method is named as refluxing and implanting titanium method which integrates acid treatment and titanium incorporation into one step and reduces the consumption of time of this process into 1 h. A density functional theory was conducted to explain the formation mechanism of interlayer-expanded structure of Ti-MWW zeolite. Subsequently, Ti-MWW precursors were treated in modified reagent solution to obtain larger pore structure, which increase the conversion of 1-hexene from 20.45 to 62.96%. The catalytic performance of Ti-MWW zeolite in this work are superior to Ti-MWW zeolite synthesized by traditional dry-gel conversion method the conversion of 1-hexene of which was 4.2%. This novel method is a promising approach for the synthesis of high catalytic performance heteroatomic zeolite. [GRAPHICS] .
Keyword ：
1-hexene 1-hexene Implanting titanium method Implanting titanium method Interlayer modification Interlayer modification Ti-MWW Ti-MWW
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| GB/T 7714 | Chu, Jidong , Ge, Zhijin , Peng, Jiahui et al. Synthesis of Ti-MWW Zeolite by Refluxing and Implanting Titanium Method and Further Application in 1-Hexene Epoxidation [J]. | CATALYSIS LETTERS , 2022 , 153 (2) : 348-363 . |
| MLA | Chu, Jidong et al. "Synthesis of Ti-MWW Zeolite by Refluxing and Implanting Titanium Method and Further Application in 1-Hexene Epoxidation" . | CATALYSIS LETTERS 153 . 2 (2022) : 348-363 . |
| APA | Chu, Jidong , Ge, Zhijin , Peng, Jiahui , Hu, Hui , Guo, Shujuan , Chen, Xiaohui . Synthesis of Ti-MWW Zeolite by Refluxing and Implanting Titanium Method and Further Application in 1-Hexene Epoxidation . | CATALYSIS LETTERS , 2022 , 153 (2) , 348-363 . |
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The purpose of this study is to design the oxygen-rich biochar through torrefaction for the detoxification of toxic metals in agricultural wastewater. The optimum operation parameters, kinetic, isotherm, and thermodynamic study are investigated. The influence of torrefaction biochar on toxic metal adsorption is analyzed by using site energy distribution theory. The adsorption mechanism is analyzed by Fourier transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS). Two-dimensional FTIR analysis and density functional theory (DFT) calculations are further used to inquire the prior interactional sequence between surface functional groups and poisonous metals. The results indicate that the sorption mechanism of Cr(VI) is ascribed to the adsorption-coupled reduction mechanism that some redox-active components provide electrons for Cr(VI) reduction. Surface complexation is mainly the Cu(II) sorption mechanism with a small content of Cu(II) reduction to Cu(I). The catechol hydroxyl group is the main form of phenol-OH on the TBC surface.
Keyword ：
2D-IR Analysis 2D-IR Analysis Agricultural wastewater Agricultural wastewater DFT Calculations DFT Calculations Torrefaction biochar Torrefaction biochar Toxic metal Toxic metal
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| GB/T 7714 | Hu, Hui , Zhang, Jiayuan , Wang, Tian et al. Adsorption of toxic metal ion in agricultural wastewater by torrefaction biochar from bamboo shoot shell [J]. | JOURNAL OF CLEANER PRODUCTION , 2022 , 338 . |
| MLA | Hu, Hui et al. "Adsorption of toxic metal ion in agricultural wastewater by torrefaction biochar from bamboo shoot shell" . | JOURNAL OF CLEANER PRODUCTION 338 (2022) . |
| APA | Hu, Hui , Zhang, Jiayuan , Wang, Tian , Wang, Pei . Adsorption of toxic metal ion in agricultural wastewater by torrefaction biochar from bamboo shoot shell . | JOURNAL OF CLEANER PRODUCTION , 2022 , 338 . |
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