CHEMICAL ENGINEERING JOURNAL
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2024
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IF 13.3
Ziheng Li,Wenji Zheng,Xuehua Ruan,Yan Dai,Xiangcun Li,Miao Yu,Xiaobin Jiang,Xuemei Wu,Gaohong He
Highly-loaded metal–organic frameworks (MOFs) based mixed matrix membranes (MMMs) are essential for high-efficiency gas separation. However, the continuous distribution of MOFs across the membrane with intensified interface remains challenging. Herein, a flexible and defects-free MMM with a bi-continuous MOFs pathway is constructed by dopamine (DA)-assisted MOFs growth along nanofibers. Nanofibers are used to upload and distribute ZIF-8, which continues to grow via an epitaxial growth strategy to obtain ZIF-8 fibers, achieving ZIF-8 continuous both in long and short range. DA promotes heterogeneous nucleation and growth of ZIF-8 on fiber surface by chelating with Zn 2+ through –OH and –NH 2 groups. DA also ensures excellent interfacial compatibility by hydrogen bonding interaction between amino groups of DA and ether-oxygen groups of PEO. Finally, the highly-loaded MMM is constructed by in-situ photopolymerization of Poly (ethylene glycol) diacrylate) to embrace ZIF-8 fibers tightly. The resultant MMM presents ZIF-8 loading as high as 72.41 vol% with Young’s modulus of 33.42 MPa, and unchanged morphology and separation performances after bending for 180° over 50 times, revealing outstanding mechanical properties. The CO 2 permeability and CO 2 /N 2 selectivity are 280.3 % and 73.0 % higher than the PEO membrane, surpassing the 2019 McKeown upper bound.
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APPLIED ORGANOMETALLIC CHEMISTRY
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2024
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IF 3.7
Qiuyun Zhang,Ting Li,Zhenying Li,Yanhui Lei,Xingyue Hong,Mei Deng,Jingsong Cheng,Zhengjun Liu,Yutao Zhang
Metal–organic frameworks (MOFs) are ideal supports for the synthesis of porous composite catalysts. In the present study, Sn-Bi bimetallic metal–organic frameworks (Sn-Bi-MOFs) supported silver-doped phosphotungstic acid (AgPW) catalysts (AgPW@Sn-Bi-BDC and AgPW@Sn-Bi-BDC (NH 2 )) were successfully synthesized via a simple in situ impregnation method, which was subsequently applied to catalyze esterification for the production of biodiesel from oleic acid (OA). The physico-chemical properties of the prepared composite catalysts underwent comprehensive analysis through XRD, FTIR, N 2 physisorption, SEM, EDX, NH 3 -TPD, Py-FTIR, TG, and XPS techniques, confirming the successful impregnation of AgPW on the Sn-Bi-MOFs framework. Among the catalysts tested, AgPW@Sn-Bi-BDC (NH 2 ) exhibited the better catalytic activity than that of Sn-Bi-BDC, Sn-Bi-BDC (NH 2 ), and AgPW@Sn-Bi-BDC, reaching 91.6% of OA conversion with the methanol:OA molar ratio of 20:1 and the catalyst quantity of 0.2 g at 130°C for 4 h. The high activity of AgPW@Sn-Bi-BDC (NH 2 ) is attributed to the available multiscale pore structure, high acidity, and the synergistic action of the Brønsted and Lewis acidic sites. Additionally, the esterification with AgPW@Sn-Bi-BDC (NH 2 ) followed the first-order reaction kinetic model, with an E a of 34.5 kJ/mol. Moreover, the recyclability of the composites was also assessed, demonstrating sustained catalytic activity after four reuses. This approach showed a potential for sustainable and efficient energy production through bimetallic MOFs-based composite catalysts.
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Scientific Reports
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2024
·Vol. 14
·期 1
·1-14
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IF 3.8
Shen Cong,Yan Jing,Ai Zhipeng,Huang Hongbing,Mo Lin,Liang Bangzhi,Zhang ChangHui
Adding corrosion inhibitors is considered to be a cost-effective way to inhibit metal corrosion. In this study, we report the synthesis of a bi-mannich base corrosion inhibitor (BMT) with an impressive inhibition efficiency on carbon steel in H 2 S and HCl co-existing solution. At the BMT concentration of 9 ppm, the inhibition efficiency (η) of 96.9%, 97.6% and 98.0% were determined by weight loss, potentiodynamic polarization and electrochemical impedance spectroscopy, respectively. The adsorption of BMT on the carbon steel surface follows the Langmuir adsorption isotherm, and the calculated free energy indicates that the adsorption is a spontaneous process. This research also delves into understanding the adsorption behavior and corrosion inhibition mechanism of BMT on carbon steel surfaces through quantum chemistry calculations. The results of this study provide guidance for the application of BMT as a corrosion inhibitor in sour and acid environments.
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CHEMICAL ENGINEERING JOURNAL
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2024
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IF 13.3
Yi Yin,Yiwen Zhu,Pengkun Liao,Xiaoyi Yuan,Junjun Jia,Changyong Lan,Chun Li
Gd-doped WO 3 nano-stalagmites (GW-NSs) film has been successfully prepared on indium-doped tin oxide (ITO)-coated glass substrates by co-sputtering deposition. Gd dopants can facilitate the vertically-aligned growth of WO 3 nano-stalagmites on the WO 3 -nanoparticle seed layer. The microstructure analysis shows that the GW-NSs film with optimized aspect ratio and array density is fabricated with Gd/W = 0.6 % in atomic ratio. Such GW-NSs electrode (active area: 1 × 1.5 cm 2 ) exhibits large transmittance modulation (ΔT = 52.7 % at 633 nm), high coloration efficiency (87.3 cm 2 C −1 at 633 nm), fast switching speed (5.9/13.1 s for coloration/bleaching), large diffusion coefficient (9.52 × 10 −10 cm 2 s −1 ) and long-term cycling stability (>2000) under an applied voltage of ± 1.0 V, which can be attributed to a shorten Li + diffusion distance and a large-area contact with the electrolyte. Importantly, the GW-NSs film also shows superior capacitive performance (calculated areal capacitance of 8.44 mF cm −2 at 0.4 mA cm −2 ) and long-term cyclic stability (capacitance retention rate is 87.4 % after 2000 cycles). Furthermore, we fabricated the bifunctional smart window device combined with NiO counterpart electrode, which has the ability to visually monitor the level of stored energy from rapid and reversible coloration, indicating the potential applications of GW-NSs in both electrochromic and energy-storage fields.
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Asian Journal of Pharmaceutical Sciences
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2024
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IF 10.7
Ting Yang,Zihan Liu,Zixuan Fu,Xiaojie Zhang,Yongjin Cao,Qiangwei Liang,Jiale Miao,Hao Yang,Tong Zhang,Jing Hei,Weiqing Ni,Yanhua Liu
Ferroptosis can serve as a potent strategy for regulating cell death via lipid peroxidation and the imbalance of the antioxidant system resulting from iron accumulation in triple-negative breast cancer (TNBC) therapy. However, the ferroptosis accompanied with down-regulation of glutathione peroxidase 4 (GPX4) lead to CD36-mediated tumor-infiltrating CD8 + T cells uptaking fatty acids, resulting in the negative action on immunotherapeutic efficacy. Herein, the albumin nanoparticles, abbreviated as LHS NPs, were designed by co-assembly of hemin, linoleic acid-cystamine, and a CD36 inhibitor sulfosuccinimide oleate, to bi-directionally manipulated ferroptosis in tumor and CD8 + T cells for TNBC therapy. LHS NPs exerted more efficient reactive oxygen species generation, glutathione depletion and malondialdehyde production by the combinatory strategy of classical and non-classical ferroptosis modes, which amplified the positive action on ferroptosis in tumor cells. Meanwhile, LHS manipulated the negative action of ferroptosis by inhibiting the CD36 mediated-lipid peroxidation in CD8 + T cells, thereby activating the immunotherapeutic efficacy with the improvements on induction of immunogenic cell death, proliferation of CD4 + CD8 + T cells and natural killer cells, alleviation immunosuppressive regulatory T cells and myeloid-derived suppressor cells, and repolarization of the M2- to M1-phenotype tumor-associated macrophages. Thus, LHS NPs demonstrated an improved antitumor efficacy in suppressing the tumor growth and lung metastasis of 4T1-tumor mice. Our work gives novel insights for the bi-directionally manipulating ferroptosis in tumor and CD8 + T cells on TNBC chemoimmunotherapy.
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VACUUM
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2024
·
IF 3.8
Kaiting Yang,Xiongtao Lv,Jingwen Meng,Huiqing Wang,Lin Guo,Xin Li,Fengyun Su,Qing Lan,Zhengdao Li,Wei Wang,Yuwei Guo,Xiaoli Jin,Haiquan Xie
Photothermal catalytic reduction of CO 2 into high value-added C 2 hydrocarbon products is a promising method for efficient CO 2 conversion. However, current photocatalysts still encounter obstacles including limited photoabsorption range, rapid recombination of photogenerated carriers , and inadequate surface active sites. Herein, Bi 4 O 5 Br 2 co-modified with oxygen vacancy (OV) and metal bismuth (Bi) (Bi 4 O 5 Br 2 -OV@Bi) has been prepared to optimize these crucial issues. Bi 4 O 5 Br 2 -OV@Bi delivers a remarkably improvement in CO 2 photothermal conversion, reflecting by the notable increase in C 1 (CO and CH 4 ) and newly generated C 2 (C 2 H 4 and C 2 H 6 ) products compared to pristine Bi 4 O 5 Br 2 . In situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) spectrometry reveals that OC−COH* intermediate promotes the C–C coupling for produce C 2 hydrocarbons. This study strengthens the understanding of metal modification and defect engineering for forming C 2 hydrocarbons on bismuth-based photocatalysts .
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JOURNAL OF ELECTROANALYTICAL CHEMISTRY
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2024
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IF 4.1
Zhongyun Yang,Xiaojia Zhang,Kexin Huang,Muhammad Waqas,Xinglan Peng,Limin Wang,Xiaotian Liu,Dujuan Huang,Qiulan Huang,Du-Hong Chen,Youjun Fan,Wei Chen
Fe/N/C is recognized promising catalyst for oxygen reduction reaction (ORR), playing a pivotal role in advancing the commercialization of proton exchange membrane fuel cells. However, an inadequate ORR activity hinders its potential applications. Here, we present the preparation of M–Nx–C (M = Fe, Zn) bi-active sites for promoting ORR. By the pyrolysis of benzimidazole salts, a porous coin-like iron-zinc-based nitrogen-doped carbon materials (FeZn-NC) catalyst was synthesized with abundant active sites. X-ray photoelectron spectroscopy and transmission electron microscopy characterizations indicated the successful doping of Zn and Fe within the carbon framework. Electrochemical measurements demonstrated great positive half-wave potential (0.90 V), high limiting current density (5.15 mA·cm −2 ), excellent methanol resistance, and good stability of FeZn-NC, compared to commercial Pt/C catalysts. Furthermore, an investigation into correlation between doping content of Fe and the ORR performance was carried out. As an cathode catalyst of zinc-air battery, FeZn-NC exhibited more significant advantages, including a high open-circuit voltage (1.54 V), enhanced power density (199.89 mW·cm −2 ), good specific capacity (771.9 mAh g Zn −1 ), and enhanced stability compared to Pt/C. By presenting an approach for the controlled synthesis of metal-doped carbon materials, this work establishes the groundwork for potential applications in catalytic fields, as demonstrated by the prepared FeZn-NC.
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Molecular Catalysis
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2024
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IF 3.9
Liwen Yin,Qianqian Zhang,Hefeng Cheng,Yuanyuan Liu,Baibiao Huang,Peng Wang
Photocatalytic synthesis of carbonyl compounds (aldehydes or ketones) offers great potential for sustained development in the production of pharmaceuticals and fine chemicals. Nevertheless, exploring photocatalysts with high stability, activity, and selectivity remains a significant challenge. In this study, Cs 3 Bi 2 Br 9 (CBB) perovskite nanocrystals have been successfully fabricated by confining the in-situ growth of perovskite CBB within mesoporous molecular sieve SBA-3. The obtained nanocrystals (2–4 nm) possess the advantages of excellent stability, exceptional dispersibility, abundant active sites, and enhanced charge carrier separation capability. Under visible light irradiation and air atmosphere, the CBB@SBA-3 could effectively oxidize benzyl alcohol to benzaldehyde with a total yield of 98.9 μmol, which is 22 times superior to that of bulk CBB, accompanied by a remarkable 99 % selectivity. Comparative experiments and in situ characterizations reveal the roles of electron ( e − ), hole ( h + ), and superoxide radical (·O 2 − ), while successfully capturing the carbon intermediates (·C) during the reaction process, further providing a comprehensive elucidation of the mechanism underlying the conversion of benzyl alcohol to benzaldehyde. This work is expected to provide insights into extending the design and photocatalytic application of Bi-based halide perovskite nanocrystals.
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ACS Catalysis
·
2025
·
IF 13.1
Lecheng Liang,Hengyu Li,Peng Li,Jinhui Liang,Shao Ye,Binwen Zeng,Mingjia Lu,Yanhong Xie,Yucheng Wang,Taisuke Ozaki,Shengli Chen,Zhiming Cui
A long-standing puzzle for methanol electrooxidation is the fundamental understanding of the origin of electrocatalytic selectivity. Herein, we unequivocally demonstrate that the Bi-modified Pt/C follows a CO-free dominated pathway during alkaline methanol electrooxidation and unveil the formaldehyde (HCHO) intermediate as a critical factor influencing pathway selectivity. These findings are substantiated by kinetic isotope effects, formate Faradaic efficiency, in situ spectroscopy, ab initio molecular dynamics simulations, and density functional theory calculations. Bi modification significantly increases the HCHO dehydrogenation barrier, which facilitates its desorption and subsequent conversion to the H2COOH– anion at the alkaline interface, intrinsically avoiding CO formation. More specifically, the formation of ensemble sites featuring a V-shaped Bi–Pt–Bi configuration inhibits the cleavage of the C–H bond, and the weak OH binding energy at Bi adatoms effectively prevents blockage of oxygenated species, allowing such ensemble sites to fulfill their functional role. This work provides in-depth insights into the origins of pathway selectivity and benefits the theory-guided design of advanced CO-free electrocatalysts.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2025
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IF 9.7
Xinyu Gu,Huiyu Sun,Nannan Zhang,Jun Yu,Jie Li,Changqing Ye,Yukou Du
One-dimensional (1D) Pd-based nanowire materials, characterized by high aspect ratios and exposed high-index crystal surfaces, are widely developed in the field of direct fuel cells. However, their synthesis methods are often not universal and necessitate demanding conditions, including high temperatures and metal templates, leading to resource consumption. In this study, we present a simple and universal one-step method for synthesizing PdM (Sb, Ir, and Bi) nanowire networks (NNWs) at room temperature. Leveraging their structural advantages and the synergistic effects between bimetals, PdM NNWs demonstrate exceptional electrocatalytic performance, exhibiting higher mass and specific activities as well as enhanced durability compared to Pd/C for the ethylene glycol and glycerol oxidation reactions. Notably, PdSb NNWs excelled in electrochemical tests, achieving the highest mass activities of 7.55 and 5.59 A mg −1 for the ethylene glycol oxidation reaction (EGOR) and glycerol oxidation reaction (GOR), respectively. Additionally, due to the semi-metallic properties of Sb, which can flexibly modify the chemical environment of Pd, the PdSb NNWs exhibited superior antitoxicity and a significantly lower decay of current density across three consecutive chronoamperometry (CA) tests. This research advances the synthesis of palladium-based nanostructures, providing impetus for the design of highly efficient electrocatalysts in the realm of direct alcohol fuel cells.
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Inorganic Chemistry Frontiers
·
2025
·
IF 6.4
Lei Wu,Xudong Leng,Bao Jiang,Xueyin Fu,Yi Huang,Xue Yu,Qun Jing,Zhaohui Chen
By leveraging second-harmonic generation (SHG) capabilities, ultraviolet (UV) nonlinear optical (NLO) crystals can efficiently produce UV coherent light and are essential components for advancing UV solid-state laser systems. Herein, two new bismuth phosphates, Rb1.32Bi3.56P2O11 (I) and K1.08Bi3.64P2O11 (II), were synthesized via a high-temperature melt method. Of them, Rb1.32Bi3.56P2O11 exhibits a significant phase-matching SHG response (2.8 × KDP) and large birefringence (0.062 @ 532 nm, 0.053@1064 nm), along with an expanded UV transmission window. Moreover, theoretical analyses revealed that the optimized optical polarizability of Rb1.32Bi3.56P2O11 primarily arises from the cooperative effects of the one-dimensional (1D) polycationic Bi(2)Bi(2)×Bi(1)Bi(1)×Bi(1)Bi(1)×Bi(2)Bi(2) ribbons and [PO4] tetrahedron. We believe the work will provide a valuable strategy to design UV NLO materials with good performances.
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MATERIALS RESEARCH BULLETIN
·
2025
·
IF 5.7
Juan Liu,Yingnan Qin,Meiqi Wang,Hengjun Liu,Tao Zheng,Jing Tian,Jing Wang
BiVO 4 -based materials have attracted extensive research as advanced photoanode for photogenerated cathodic protection. However, the performance of BiVO 4 -based photoanodes is greatly hindered by its weak charge migration and positive conduction band potential. Herein, poly-2,6-diaminoanthraquinone (PDAAQ)/Bi was grafted on BiVO 4 to improve the separation efficiency of photogenerated carriers and enhance the reducing ability of photogenerated electrons. Studies show that a type II heterojunction can be formed between PDAAQ and BiVO 4 , which accelerates the separation of photogenerated carriers at the interface. In addition, the Bi monomers anchored on BiVO 4 /PDAAQ then expand the light absorption range through the surface plasmon resonance effect. Consequently, the obtained BiVO 4 /PDAAQ/Bi photoanode exhibits a promising photocurrent density of 40 μA·cm -2 , while the photoinduced potential drop is 540 mV, which is approximately 1.4 times of BiVO 4 materials. These outcomes provide general ideas for the design of organic-inorganic heterozygous systems for achieving eco-friendly corrosion protection.
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