JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
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2024
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IF 2.8
Haoyu Liu,Jingye Ma,Hong Yuan,Xiang Shi
BACKGROUND A series of Pt@NZSM–5 and Pt/NZSM–5 nanosheets having different Si/Al ratios were prepared via an in situ synthesis and impregnation method, respectively, using C 22 H 45 –N + (CH 3 ) 2 –C 6 H 12 –N + (CH 3 ) 2 –C 6 H 13 (C 22–6–6 ) as the template agent. The oleic acid decarboxylation reaction was carried out using these materials under CO 2 atmosphere and the oleic acid cracking mechanism was inferred from the product distribution of the C8-C17 alkanes. RESULTS The Pt@NZSM–5 and Pt/NZSM–5 was found to comprise thinner nanosheets and exhibited strong metal–substrate interactions. Pt@NZSM–5 nanosheets with a Si/Al molar ratio of 100 had thicknesses of only 8–9 nm along with a mesopore/micropore capacity ratio of 2.7, an acid content of 11 cm 3 /g STP and a high Pt 0 /PtO x ratio. CONCLUSION The Pt@NZSM-5 and Pt/NZSM-5 nanosheets had an interconnected hierarchical system and a large number of metal active sites that facilitated the decarboxylation of oleic acid. The Pt@NZSM–5 nanosheets demonstrated excellent catalytic activity during the cracking of oleic acid under a CO 2 atmosphere, giving a yield of C8–C17 alkanes as high as 83.8% after 5 h at 320 °C. These Pt@NZSM–5 nanosheets also showed greater stability than the Pt/NZSM–5 specimens. © 2024 Society of Chemical Industry (SCI).
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高影响因子
RENEWABLE ENERGY
·
2024
·
IF 9
Xian Shi,Xinyi Xing,Wanni Liu,Mengya Ruan,Ying Guan,Gaojin Lyu,Hui Gao,Siquan Xu
The efficient catalytic conversion of cellulose to 5-hydroxymethylfurfural (HMF) can provide a valuable reference for the high-value utilization of biomass. In this work, a series of simple phosphate-doped hafnium oxide catalysts (x-P-HfO 2 ) were prepared, and their physicochemical properties were analyzed by ICP-OES, XRD, XPS, FTIR, SEM-EDX, N 2 adsorption-desorption isotherms, NH 3 -TPD and Py-FTIR characterizes. Detailed evaluation of the reaction conditions demonstrated the ideal catalytic performance of the x-P-HfO 2 catalysts, and the HMF yield from cellulose reached a satisfactory 61% in the water (NaCl) /tetrahydrofuran biphasic reaction system. Based on the captured intermediates and detected by-products, possible catalytic pathways are summarized. Meanwhile, the hydrothermal stability of the catalyst was also investigated, and the reason for its performance degradation after five cycles was determined to be the loss of useful Brønsted active sites. In addition, the effects of the phosphating and sulfating modification approaches on the catalyst activity were also compared, verifying that the introduction of phosphate is more conducive to the catalyst expressing high activity for the formation of HMF from cellulose.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
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2022
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IF 16.744
Yuchi Zhang,Le Han,Bohan Li,Yan Xu
All-inorganic perovskite quantum dots (PQDs) CsPbX 3 (X = Cl and Br) are expected a new generation of promising luminescent materials with narrow-band emissions, color-tunability, and high photoluminescence quantum yields (PLQYs), but the instability towards humid environments and high temperatures restrict their practical applicability. In this work, a hierarchically structured zeolite (HSZ) of ZSM-5 (Si/Al = 50) featured micro-mesoporous cross-linked architecture was applied to encapsulate CsPbX 3 PQDs through a simple thermal diffusion strategy. The luminescence performances of CsPbX 3 PQDs hybridized ZSM-5 nanocomposites can be optimized in the hierarchical micro-mesoporous structures. Particularly, the CsPbBr 3 -HSZ ZSM-5 composite calcined at 700 °C exhibited highly water-stable luminescence performance with a full-width at half-maximum (FWHM) of 22 nm and a high photoluminescence quantum yield (PLQY, 62%), maintaining 92% of the initial emission intensity even after 100 days of immersion in water. The highly water-resistant and stable luminescent performance of the composite was attributed to the interconnected micro-mesoporous network of HSZ ZSM-5, in which micropores provide a shielding wall to isolate the CsPbBr 3 PQDs from the external environment and mesopores help to promote the diffusivity of precursors towards the successful space-confinement of CsPbX 3 (X = Cl and Br) PQDs. The temperature-dependent fluorescence intensity and spectral shift characteristics of CsPbBr 3 -HSZ ZSM-5 composite afford its capacity acting as dual-mode optical thermometers, and the water-stable latent fingerprint identification has been also demonstrated by applying the CsPbBr 3 -HSZ ZSM-5 nanocomposite.
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高影响因子
Membranes
·
2025
·Vol. 15
·期 2
·42
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IF 3.6
Jihao Zuo,Mengkang Lu,Jinting Cai,Ruopeng Lan,Xinjuan Zeng,Cailong Zhou
The discharge of large volumes of textile dyeing wastewater, characterized by poor biodegradability and high toxicity, poses severe threats to the environment. In this study, polyvinylidene difluoride (PVDF) membranes were prepared using the nonsolvent-induced phase separation (NIPS) method, with porous amino-functionalized mesoporous silica nanoparticles (Am-MSNs) mixed into the casting solution to fabricate the Am-MSN/PVDF mixed matrix membranes. By varying the amount of Am-MSNs added, the microstructure and overall performance of the membranes were comprehensively analyzed. The results demonstrated that the addition of Am-MSNs significantly enhanced the hydrophilicity of the membranes. The high specific surface area and amino groups of Am-MSNs facilitated interactions with dye molecules, such as Reactive Black 5 (RB5), through hydrogen bonding, electrostatic attraction, and physical adsorption, resulting in a marked improvement in RB5 rejection rates. Static adsorption tests further validated the superior adsorption capacity of the Am-MSN/PVDF mixed matrix membranes for RB5. Additionally, the nanoscale mesoporous structure of Am-MSNs enhanced the mechanical strength of the membranes. The synergistic effects of the mesoporous structure and amino groups significantly increased the efficiency and stability of the Am-MSN/PVDF mixed matrix membranes in dye removal applications, providing an effective and sustainable solution for the treatment of dye-contaminated wastewater.
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PubMed
高影响因子
PROCESS BIOCHEMISTRY
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2024
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IF 3.7
Fanjin Meng,Qian Zheng,Yuqiu Wu,Lishi Yan,Zhi Chen,Xin Ju,Liangzhi Li
The enzymes used for D-allose production generally failed to meet the requirements of industrial production of D-allose in terms of enzyme activity and catalytic efficiency. In this study, 13 single mutants of CfRpiB (Ribose-5-phosphate isomerase from Curtobacterium flaccumfaciens ) were constructed by combining site-specific mutations and ring-open residue mutations with rational design. It was found that the enzyme activities of all 13 single mutants were positively changed relative to the wild type. Among them, the single mutant with the highest increase in enzyme activity was C72M, which increased its enzyme activity by 30 %. On this basis, three iterative mutant strains were constructed, among which C72M/S105H increased the yield of D-allose by 2.62 times. Especially, enzymatic property measurements showed that its enzyme activity increased by 50 %. Molecular docking of the C72M/S105H mutant with D-allulose revealed that the increased enzymatic activity of the mutant C72M/S105H could be attributed to the smaller substrate binding site and tighter binding to the substrate. This study further reveals the relationship between mutation sites and enzymatic properties, demonstrating the feasibility of improving the efficiency of preparing rare sugars through enzyme molecular modification.
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高影响因子
FUEL
·
2024
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IF 6.7
Zekun Guan,Guangxun Sun,Chao Feng,Junxi Li,Minmin Wang,Mengdi Guo,Bin Liu,Yuan Pan,Chenguang Liu,Yongming Chai,Yunqi Liu
The production of cleaner gasoline requires reducing sulfur and olefin content in fluid catalytic cracking (FCC) gasoline. Herein, Ni/ZSM-5@Ni/ZnO catalysts were synthesized by uniformly coating Ni/ZnO on the surface of Ni/ZSM-5 by electrostatic induced crystallization strategy for FCC gasoline desulfurization-aromatization tandem reactions. The desulfurization activity of Ni/ZSM-5@Ni/ZnO has superior desulfurization activity due to the smaller size of ZnO, higher O vacancy content, and more uniform dispersion of Ni and ZnO relative to the physically mixed Ni/ZSM-5-Ni/ZnO. In addition, coating Ni/ZnO on the surface of Ni/ZSM-5 can reduce the Brønsted acid content of Ni/ZSM-5, increase the Lewis/Brønsted acid value of the catalyst, which inhibits the excessive cracking of FCC gasoline, and improves the liquid yield and aromatics selectivity. After 8 h of reaction, the desulfurization rate, aromatics generation rate and olefin conversion rate of Ni/ZSM-5@Ni/ZnO were 85.58 %, 25.22 % and 49.08 % respectively, which were higher than those of physically mixed Ni/ZSM-5-Ni/ZnO catalysts by 25.34 %, 15.95, and 12.98 %, respectively. Meanwhile, the unique structure of Ni/ZSM-5@Ni/ZnO reduces carbon deposition and delays catalyst deactivation. Density functional theory calculations show that Ni/ZSM-5@Ni/ZnO was more favorable for thiophene desulfurization and has a better ability to adsorb and activate H 2 . This study provides a new idea for the development of catalysts for clean gasoline production.
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高影响因子
Nature Catalysis
·
2025
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IF 44.6
Ren Yue,Kong Wei,Li Yang,Zhan Wang,Zhang Chunyu,Miao Yuhang,Yao Bingxin,Li Shengnan,Li Zhenhua,Liu Xiang,Zhan Sheng,Zhou Hua,Shao Mingfei,Duan Haohong
Aqueous electrolysis offers a potential sustainable route for converting biomass derivatives to plastic monomers, such as 5-hydroxymethylfurfural oxidation to 2,5-furandicarboxylic acid (FDCA). However, selective electrosynthesis of high-concentration FDCA at kilowatt scale and ampere-level current density remains an unmet challenge, hindering commercialization. Here we show an engineered solid polymer electrolyte (SPE) reactor to steer Faradaic and non-Faradaic side reactions, achieving FDCA production at an industrially relevant current density (1.5 A cm −2 ) while maintaining high selectivity (97.0%), Faradaic efficiency (88.2%) and concentration (~1.24 M). The stability of the SPE reactor was demonstrated in continuous operation at 0.5 A cm −2 over 140 h. Moreover, a 4.3-kW electrochemical platform was constructed with a scale-out strategy, reaching a pilot-scale FDCA production rate (33 kg per day). This work shows the capability of reactor engineering to enable selective and large-scale production of sustainable chemicals via electrochemical processes.
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高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
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2024
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IF 20.2
Lu Lin,Yongjian Zeng,Suyu Zhang,Di Hu,Zhiwei Jiang,Guoqing Guan,Kai Yan
The hydrodeoxygenation (HDO) of 5-hydroxymethylfurfural (HMF) to biofuel 2,5-dimethylfuran (DMF) serves as a vital reaction in biomass refineries. Herein, Pd-UiO-66 catalysts with controlled contents of ligand-vacancies were developed for the HMF-to-DMF conversion. Strikingly, a volcano-like relationship between defect level and HDO activity was obtained. The DMF yield was promoted ∼3 times, reaching 92.2 % at 160 °C and 15 bar H 2 , which refers to a high-level turnover frequency value of 42.66 h −1 among the reported candidates. The Pd-UiO-66 catalysts also afforded >80 % yield for the HDO of 5-methyl furfural, furfural, and vanillin. Besides, high HDO activity could be retained in five recycles. Manipulating the contents of ligand-vacancies was confirmed to create more Pd 0 species and Bronsted acid sites, leading to remarkable performance. This work provides significant inspiration for tuning structural defects in MOFs to realize the efficient HDO of platform molecules in biomass valorization.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
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2024
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IF 13.3
Jinye Hu,Wenguang Zhou,Yunpu Wang,Haiwei Jiang,Jiabo Wu,Ting Luo,Mengjiao Wang,Weixin Wang,Qi Wang,Yuhang Hu,Liangliang Fan
HZSM-5 widely used for the catalytic pyrolysis of biomass exhibits the drawbacks of high diffusion resistance and large coke production. To effectively enhance the catalytic efficiency and alleviate the coke deposition, a novel promising catalyst, HZSM-5 coated activated carbon (HZSM-5@AC), was prepared for the first time for in-line upgrading the pyrolysis products of soybean straw. Various catalysts including HZSM-5, activated carbon, and the HZSM-5@AC catalysts with different HZSM-5 to activated carbon mass ratios were characterized. The results showed that the HZSM-5 was successfully coated on the surface of activated carbon and the addition of activated carbon introduced a mesoporous structure and more acidic sites to the catalyst. The catalytic performance on the biomass conversion showed that the catalyst with HZSM-5-to-activated carbon mass ratio of 18:5 (18HZSM-5@5AC) had the highest catalytic efficiency on the conversion of biomass into aromatics with a selectivity of 99.5%, including 75.68% of benzene, toluene, and xylenes (BTX) with a yield of 74.68 mg/g. Moreover, a possible pathway for HZSM-5@AC catalyzed biomass pyrolysis was proposed through analyzing the conversion of model compounds. The catalyst cycling experiments demonstrated the higher stability of HZSM-5@AC than the parent HZSM-5 and activated carbon. TG, FTIR, Raman and SEM showed that the spent HZSM-5@AC was hardly structurally changed with a low coke yield of 0.08%. However, the spent HZSM-5 was partly structurally deactivated by large aromatic ring systems with a coke yield of 3.74%. SEM results also showed that a large amount of polymerized material encapsulated the surface of the spent HZSM-5.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
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IF 13.2
Mengze Gong,Lingyu Jia,Shanshan Dang,Tianliang Lu,Peng Wang,Weifeng Tu,Zhenzhou Zhang
The catalytic conversion of biomass-derived 5-hydroxymethylfurfural (HMF) into high-value-added products, such as 2,5-bis(hydroxymethyl)furan (BHMF) and 2,5-bis(hydroxymethyl)tetrahydrofuran (BHMTHF) has attracted considerable attention. Among this process, controlling the distribution of the catalytic products plays a vital role. In this paper, NiCe and NiZnCe catalysts were prepared by the sol-gel method. By optimizing the metal loading amount and reaction conditions, a selectivity of 95.3 % to BHMTHF with the NiCe catalyst and a selectivity of 94.1 % to BHMF with the NiZn 0.1 Ce catalyst were achieved. Characterization results demonstrated that the addition of Zn causes electrons to transfer from Zn to Ni and increases the content of oxygen vacancies on the catalyst surface, inhibiting the adsorption of furan ring on the NiZn 0.1 Ce surface, thus precisely controlling hydrogenation sites at the C O rather than the C C of the furan ring. This study provides guides for precise regulation of product selectivity when designing catalysts, and it is expected to be applied to the catalytic conversion of biomass-derived platform molecules.
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高影响因子
NEW JOURNAL OF CHEMISTRY
·
2025
·
IF 2.5
Wenpeng Han,Shujuan Wang,Fujiang Geng,Lei Liu,Ruidi Wei,Mingxing Tang
An efficient and selective nickel-molybdenum nitride catalyst has been developed for the hydrogenolysis of 5-hydroxymethylfurfural (HMF) to produce 2,5-dimethylfuran (DMF). The results showed that Ni2Mo3N phase of the catalyst exhibited good hydrogenation activity for HMF, while Ni6Mo6C1.06 phase demonstrated effective C-O bond hydrogenolysis activity. By regulating the Ni/Mo molar ratios, the proportions of the Ni2Mo3N and Ni6Mo6C1.06 phases can be adjusted, and the NiMoNx (Ni:Mo=1:2) catalyst with good performance was prepared. Additionally, 2-propanol, as a good solvent, can react with HMF to form ethers, facilitating easier hydrogenolysis. This method leads to full conversion of HMF, achieving a 99% yield of DMF at 160 oC and 2 MPa H2 for 5 h. Furthermore, the catalyst displayed good recyclability, maintaining its activity over 4 cycles, indicating it has the potential application for the industrialization of 5-HMF hydrogenolysis to produce DMF.
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高影响因子
ENERGY & FUELS
·
2025
·
IF 5.3
Haoyu Liu,Yanlin Wang,Hong Yuan
The introduction of mesopores to zeolite crystals via small organic templates has attracted widespread attention. In this study, we used cetylpyridinium bromide (CET–PyBr) to direct the synthesis of hierarchical meso-microporous ZSM-5 zeolite (HMM). By varying the CET–PyBr and sodium sulfate contents in the initial gel, the pore structure and acidity of the HMM were systematically modified. X-ray diffraction (XRD), Fourier-transform infrared (FTIR) spectroscopy, scanning electron microscopy (SEM), transmission electron microscopy (TEM), and N2 adsorption/desorption were utilized to investigate HMM’s mesoporous network. In HMM, mesopore formation was attributed to the assembly of nanocrystal clusters. By optimizing the organic templates, the HMM formation mechanism was elucidated. The acidities of the HMM catalysts were further characterized using temperature-programmed ammonia desorption, magic angle spinning nuclear magnetic resonance, and Py-IR spectroscopy. At 500 °C, the catalytic cracking of oleic acid over HMM yielded up to 54.0% light olefins, and HMM maintained its activity for up to 40 h. HMM’s homogeneous mesopores and moderate acidity contributed to its extended lifespan and enhanced its gaseous product yield.
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高影响因子
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