SEPARATION AND PURIFICATION TECHNOLOGY
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2024
·
IF 8.1
Kuan Wang,Tong Sun,Hui Ma,Run-Jing You,Zhen-Hong He,Jian-Gang Chen,Huan Wang,Weitao Wang,Yang Yang,Lei Wang,Zhao-Tie Liu
The conversion of CO 2 into chemicals with value-added can be achieved through the process of photocatalysis, which holds significant importance in the fields of energy and environmental sustainability. Herein, a unique S-scheme In 2 O 3 /Bi/BiOCl heterojunction nanoflower with abundant oxygen vacancies was fabricated by a self-assembly strategy, in which the introduction of In 2 O 3 could effectively regulate the in-situ growth of metal Bi and oxygen vacancy on the surface of BiOCl nanosheet. The nanoflower In 2 O 3 /Bi/BiOCl photocatalysts exhibited exceptional photocatalytic performance in the CO 2 reduction with H 2 O, ascribing to the synergistic effect of the unique S-scheme heterojunction, the surface plasmon resonance (SPR) effect of metal Bi, and oxygen vacancy engineering. Surprisingly, the In 2 O 3 /Bi/BiOCl-4 composites achieved 34.53 μmol⋅g −1 ⋅h −1 photoreduction efficiency of CO 2 -to-CO with high selectivity (97.5 %) and high stability, which was 3.12 times higher compared to the pure BiOCl. The S-scheme heterojunction of In 2 O 3 /Bi/BiOCl-4 nanoflower can promote carrier separation efficiency and improve light utilization. Meanwhile, the large specific surface area and abundant oxygen vacancies of the nanoflower with 3D/0D/2D structure self-assembly can provide more adsorption and active sites for CO 2 photocatalytic reaction. The SPR effect of the in-situ generated metal Bi can further enhance charge transfer to accelerate the photoreduction process of CO 2 . The present study provides a novel approach for the in-situ construction of S-scheme heterojunction photocatalysts with SPR effect and oxygen vacancies to pursue efficient photocatalytic CO 2 reduction in the water phase
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JOURNAL OF CATALYSIS
·
2024
·
IF 6.5
Tianrui Xu,Guanghui Wang,Zehua Liu,Nansheng Deng,Xuewen Zhang
A green, efficient and recyclable magnetic BiFeO 3 /Cl-g-C 3 N 4 photocatalyst was prepared for the simultaneous removal of Cr(Ⅵ) and tetracycline (TC) from water by wet chemical and thermal synthesis methods. Experimental results revealed that BiFeO 3 /Cl-g-C 3 N 4 achieved a removal efficiency of 96.1 % for Cr(Ⅵ) and 98.2 % for TC under visible light irradiation for 50 min at pH 6. The results of the work function, charge density difference, UV–vis DRS, PL, PC and EIS tests indicate the formation of S-scheme heterojunctions between BiFeO 3 and Cl-g-C 3 N 4 , which exhibits superior carrier separation and migration efficiency. The evidence for interfacial charge transfer from BiFeO 3 to Cl-g-C 3 N 4 within BiFeO 3 /Cl-g-C 3 N 4 was further corroborated by means of ISIXPS, EPR and KPFM. Moreover, calculations of the density of states demonstrate that the introduction of Cl enhances the reduction capability of BiFeO 3 /Cl-g-C 3 N 4 . Results from ESR tests and trapping experiments has demonstrated that the singlet oxygen ( 1 O 2 ) and electrons are the primary active species. Furthermore, the high removal rates of TC and Cr(VI) from industrial wastewater and groundwater, coupled with the lower ecotoxicity of TC degradation intermediates, indicate that BiFeO 3 /Cl-g-C 3 N 4 has the potential for practical applications. After five cycles, the BiFeO 3 /Cl-g-C 3 N 4 still removed 90.5 % of TC and 96 % of Cr(Ⅵ).
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Journal of Environmental Chemical Engineering
·
2024
·
IF 7.4
Yanfei Lu,Lianqing Chen,Chengjiang Zhang,Mengxue Yu,Kangle Lv,Xianghong Li,Benjun Xi
The development of photocatalytic nano-purifiers with high electrons and holes separation efficiency and high-photocatalytic activity is essential in treating water and air pollution. In this paper, novel nano-purifiers with S-scheme faceted heterojunction created between BiOCl nanosheets (110) facets and TiO 2 hollow nanocubes (001) facets were successfully fabricated. In nano-purifiers, BiOCl nanosheets are enriched with oxygen vacancies capable of trapping electrons, which synergize with the unique S-scheme faceted heterojunction charge transfer mechanism to facilitate carrier separation and migration to a large extent. Herein, BiOCl(110) nanosheets/TiO 2 (001) hollow nanocubes nano-purifiers (BTHNs) were significantly enhanced in photocatalytic treatment of water and air pollution and were not inferior to other cleaning agents. The obtained 15BTHNs showed the best photocatalytic purification ability among the same series of products. 15BTHNs could degrade 99.9% of RhB in 70 min, which was 25 times higher than that of pure THNs, and effectively removed 44.8% of NO. Moreover, the reduction rate of Cr (Ⅵ) for 15BTHNs reached 99.9% in 90 min, with a kinetic constant 21.5 times higher than that of pure THNs. Active species trapping experiments revealed that four active species of BTHNs contributed to the RhB oxidation reaction in the following order:·OH>h + >·O 2 - >e - , and the contribution rates of 15BTHNs were 45.0%, 38.0%, 12.3%, and 4.7%, respectively. The appropriate ratios of oxidizing TiO 2 to reducing BiOCl in 15BTHNs allowed the generated active species to be fully utilized, achieving oxidation-reduction equilibrium as well as improving the photocatalytic efficiency. This work reveals that the S-scheme faceted heterojunction formed in the BiOCl/TiO 2 nano-purifier was a progressing approach for water and air cleaning.
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Asian Journal of Pharmaceutical Sciences
·
2024
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IF 10.7
Kang Qian,Peng Yang,Yixian Li,Ran Meng,Yunlong Cheng,Lingling Zhou,Jing Wu,Shuting Xu,Xiaoyan Bao,Qian Guo,Pengzhen Wang,Minjun Xu,Dongyu Sheng,Qizhi Zhang
Alzheimer's disease is a neurodegenerative disease induced by multiple interconnected mechanisms. Peptide drug candidates with multi-modal efficacy generated from fusion strategy are suitable for addressing multi-facet pathology. However, clinical translation of peptide drugs is greatly hampered by their low permeability into brain. Herein, a hybrid peptide HNSS is generated by merging two therapeutic peptides (SS31 and S-14G Humanin (HNG)), using a different approach from the classical shuttle-therapeutic peptide conjugate design. HNSS demonstrated increased bio-permeability, with a 2-fold improvement in brain distribution over HNG, thanks to its structure mimicking the design of signal peptide-derived cell-penetrating peptides. HNSS efficiently alleviated mitochondrial dysfunction through the combined effects of mitochondrial targeting, ROS scavenging and p-STAT3 activation. Meanwhile, HNSS with increased Aβ affinity greatly inhibited Aβ oligomerization/fibrillation, and interrupted Aβ interaction with neuron/microglia by reducing neuronal mitochondrial Aβ deposition and promoting microglial phagocytosis of Aβ. In 3 × Tg-AD transgenic mice, HNSS treatment efficiently inhibited brain neuron loss and improved the cognitive performance. This work validates the rational fusion design-based strategy for bio-permeability improvement and efficacy amplification, providing a paradigm for developing therapeutic peptide candidates against neurodegenerative disease.
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PubMed
高影响因子
JOURNAL OF ENVIRONMENTAL MANAGEMENT
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2025
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IF 8.4
Tianrui Xu,Guanghui Wang,Xuewen Zhang,Nansheng Deng
Within the domain of animal husbandry, the misuse of antibiotics in conjunction with elevated levels of heavy metals in feed has led to the contamination of agricultural soils with these metals and antibiotics. In this study, S-scheme heterojunction photocatalyst, BiFeO 3 /Cl-g-C 3 N 4 , was synthesized for the photochemical remediation of tetracycline (TC) and Cr(Ⅵ) in co-contaminated soil, utilizing pyrolysis methods. Following an 8-h photocatalytic reaction, 89.6 % of TC and 75.7 % of Cr(Ⅵ) were effectively removed in soil with the application of BiFeO 3 /Cl-g-C 3 N 4 at a mass ratio of 5 %. The diversity of microbial communities in the remediated soil increased, with a shift in dominant genera from redox bacteria to nutrient bacteria associated with carbon and nitrogen cycling. Moreover, the incorporation of BiFeO 3 /Cl-g-C 3 N 4 in the remediation of soil contamination at depths ranging from 0 to 20 cm resulted in reductions of 40.2 % and 50 % in TC and Cr(Ⅵ) concentrations in subsoil layers, respectively, after 21-days of sunlight irradiation. In comparison to the contaminated group soil, soil from the remediation treatment demonstrated increased growth potential for cabbage and spinach. This work definitely demonstrates that this soil photochemical remediation method based on BiFeO 3 /Cl-g-C 3 N 4 is technologically feasible and has immense potential in the application of remediation of organic pollutants and heavy metals co-contaminated soils.
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SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
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2025
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IF 4.6
Yi-Xi Chen,Zhenhua Tang,Le-Yan Feng,Liu-Ling Liang,Deng-Hui Shang,Hui-Qing Li,Xiao-Hai Chen,Feng-Ming Li,Xin-Gui Tang,Shang-Xian Chen
Nowadays, heavy metal pollutants have emerged as a significant global environment affecting human health. Herein, in this work, a highly sensitive and selective dual-signal ratiometric fluorescent sensor for heavy metal Pb 2+ ions detection in aquatic environments was developed by employing the combined highly fluorescent nitrogen and sulfur co-doped carbon dots (N,S-CDs) with rhodamine B (RhB) as a new dual-signal fluorescent probe. The nanostructure, optical properties and a self-calibration mechanism based on the intensity ratio of dual emission peaks were discussed, and, the co-doping of nitrogen and sulfur increased the electron transfer rate and enhanced the coordination interaction between the N,S-CDs and Pb 2+ ions were revealed in the dual-signal ratiometric fluorescent sensor. Moreover, the new sensor exhibited a robust linear response to Pb 2+ ions within the 0–180 μM range, achieving a limit of detection (LOD) of 0.45 μM (93 μg/L) in the actual measurement environment, which is observed to be commensurate with the Grade I standard limit for lead as prescribed in China's “Integrated Wastewater Discharge Standard” (100 μg/L). Furthermore, specificity experiments demonstrated the sensor's superior recognition of Pb 2+ ions over other common metal ions (e.g., Cu 2+ , Fe 3+ , Al 3+ ). In practical industrial wastewater analysis, spike recoveries of 94.20–97.53 % were achieved, with relative standard deviations (RSDs) below 1.32 %, thus validating the method's reliability. This work has been recognized to provide significant potential for environmental monitoring applications.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2022
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IF 9.965
Hao Han,Xiaomei Wang,Xu Zhang
Doping Fe N C catalysts with heteroatoms has been widely recognized as a most promising way to improve the electrocatalytic activity to achieve the replacement of Pt-based electrocatalysts for efficient oxygen reduction reaction (ORR). However, it is still a challenge to combine delicate control of the catalyst structure with heteroatom-doping to achieve optimal electrocatalytic efficiency. Herein, a strategy of combining chemical vapor deposition (CVD) with dual-template cooperative pyrolysis was rationally designed to synthesize the novel electrocatalyst with densely isolated single Fe atoms scattered on hierarchically ordered porous N and S codoped carbon (ISA-Fe/HOPNSC). The three-dimensional hierarchically ordered interconnected macro/mesoporous structure and uniform sulfur-doping make ISA-Fe/HOPNSC exhibit superb ORR performance in both alkaline and acidic electrolytes with a positive half-wave potential (0.920 V in 0.1 M KOH and 0.795 V in 0.5 M H 2 SO 4 ) as well as outstanding methanol tolerance and long-time stability. As cathode catalyst in Zn-air battery, ISA-Fe/HOPNSC also provides much better maximum power density (210.7 mW cm −2 ) and specific capacity (796.7 mAh g Zn −1 ) than those of Pt/C (112.6 mW cm −2 and 712.6 mAh g Zn −1 ). Remarkably, the synthesis strategy in this work proposes myriad opportunities for combining delicate control of the catalyst structure with heteroatom doping to synthesize high-performance ORR catalysts.
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高影响因子
MOLECULES
·
2019
·Vol. 24
·期 24
·4526
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IF 3.06
Xia Wang,Ying Wei,Wei-Yi Tian,Meena Kishore Sakharkar,Qing Liu,Xin Yang,Yan-Zi Zhou,Cheng-Li Mou,Gui-Lan Cai,Jian Yang
In this study, we isolated nine compounds from the acid hydrolysate of the flower buds ofLonicera fulvotomentosaHsu et S. C. Cheng and characterized their chemical structures using1H-NMR,13C-NMR, and electron ionization mass spectroscopy (EI-MS). These compounds were identified as β-sitosterol (1), 5,5′-dibutoxy-2,2′-bifuran (2), nonacosane-10-ol (3), ethyl (3β)-3,23-dihydroxyolean-12-en-28-oate (4), oleanolic acid (5), ethyl caffeate (6), caffeic acid (7), isovanillin (8), and hederagenin (9), with4as a new triterpene compound. Inhibitory activity against human immunodeficiency virus (HIV) protease was also evaluated for the compounds, and only ethyl caffeate, caffeic acid, and isovanillin (6,7, and8) exhibited inhibitory effects, with IC50values of 1.0 μM, 1.5 μM, and 3.5 μM, respectively. Molecular docking with energy minimization and subsequent molecular dynamic (MD) simulation showed that ethyl caffeate and caffeic acid bound to the active site of HIV protease, while isovanillin drifted out from the active site and dissociated into bulk water during MD simulations, and most of the binding residues of HIV protease have been previously identified for HIV protease inhibitors. These results suggest that caffeic acid derivatives may possess inhibitory activities towards HIV protease other than previously reported inhibitory activities against HIV integrase, and thus ethyl caffeate and caffeic acid could be used as lead compounds in developing potential HIV protease inhibitors, and possibly even dual-function inhibitors against HIV.Keywords:Lonicera fulvotomentosaHsu et S. C. Cheng;acid hydrolysate;HIV protease;molecular docking;inhibitor
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高影响因子
ACS ES&T Engineering
·
2022
·
IF 0
Kunjie Hou,Zhoujie Pi,Fei Chen,Li He,Fubing Yao,Shengjie Chen,Xiaoming Li,Haoran Dong,Qi Yang
The practical application of the traditional Fenton system (Fe(II)/H2O2) is seriously hampered by the sluggish Fe(III)/Fe(II) cycle and the stringent acidic reaction condition. In this work, we found that trace-dissolved S(-II) (DS(-II), 5 μM) could significantly accelerate the Fe(III)/Fe(II) cycle and trigger a rapid H2O2 activation process in the Fe(III)/H2O2 system. Thus, more hydroxyl radicals (·OH) were generated for the rapid removal of various organic pollutants such as bisphenol A (BPA) and sulfamethoxazole (SMX) from water. Besides, the additive DS(-II) effectively broadened the application pH range of the Fenton or Fenton-like system. The constructed Fe(III)/DS(-II)/H2O2 system showed extensive applicability to different water matrices and maintained high BPA removal in the actual water sources. Furthermore, the toxicity assessment revealed that the toxicity of the target contaminant was diminished. The harmless SO42– was the final product of DS(-II) in the Fe(III)/DS(-II)/H2O2 system, and the residual DS(-II) was less than the threshold limit value for fresh or saltwater (0.5 mg/L). This discovery is expected to promote the large-scale practical application of iron-based Fenton or Fenton-like systems in practical organic wastewater purification.
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Science of Advanced Materials
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2018
·Vol. 10
·期 10
·1381-1388
·
IF 1.318
Yao Shujuan,Li Qiancheng,Kong Ningning,Li Chao,Wei Mingming,Song Ruru,Ren Xiaozhen,Pu Xipeng,Li Wenzhi
We presented facile synthesis of Cu3–x
Zn
x
SnS4 composites (CZTSs, 0 ≤ x ≤ 3) with variety morphologies via simple one-pot hydrothermal process without hazardous chemicals, simply by varying initial precursor Cu/(Zn +
Sn) concentration ratio. The influence of initial Cu/(Zn+Sn) concentration ratio on the microstructures and properties of composites was investigated. The morphological, structural, and optical properties of the samples were characterized by field-emission scanning and transmission electron
microscopes, X-ray diffraction, N2 adsorption–desorption, and UV-Vis diffuse reflectance. The photocatalytic activity of the samples was studied using visible light irradiation of rhodamine B. Benefiting from the initial precursor Cu/(Zn+Sn) concentration, the as-prepared
3D hierarchical carnation-flowerlike CZTSs with high initial zinc concentration exhibit superior adsorption capability and much higher photocatalytic activity than that with low initial zinc concentration. The possible degradation mechanism of RhB was proposed.
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POLYMER DEGRADATION AND STABILITY
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2022
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IF 5.204
Rui Zhang,Lishuai Zong,Jinyan Wang,Xigao Jian
Poly(aryl ether ketone)s (PAEKs) exhibit excellent thermal and mechanical properties, but their poor processability limit further application. In this regard, a bio-based cross-linking high-performance PAEK was prepared through the Diels-Alder (DA) reaction between furyl-functionalized PAEK and N,N'-4,4′-diphenylmethylene-bismaleimide (BMI). First, two novel fully bio-based furyl-functionalized bisphenols, BPF-M and BPF-AM, were prepared by simple one-step aromatic substitution of two bio-based o‑methoxy-phenols and furfural. Orbital interaction of the DA reactions between the two bisphenols and BMI was investigated with B3LYP density functional method, and the quantitative study was performed with DSC and 1 H NMR. Next, a series of PAEKs (LINKERs) with high biomass content of 58.7–72.8% were prepared with BPF-M, 2,5-bis(4-flurobenzoly)furan (BFBF) and 6-(4hydroxy-3-methoxyphenyl)pyridazin-3(2H)-one (GSPZ). LINKERs had excellent thermal properties (T g = 182–212 °C, T d10% = 415–452 °C), processing properties (lowest rheology viscosities = 178–3217 Pa·s) and solution processability. Finally, PAEK themo-reversible gel and cross-linking film were prepared through the DA reaction between LINKER-73 and BMI. The film had solvent resistance and high tensile strength, which increased from 75 MPa to 101 MPa compared to the uncrosslinked one. Besides, LINKERs gained the ability of reprocessing and recycled via DA and r-DA reactions. We expect to provide important theoretical and practical references on bio-based furyl-functionalized bisphenols and high-performance PAEKs.
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CARBON
·
2024
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IF 10.5
Shuhui Tao,Songmin Xiang,Yaqing Yu,Hong Lan,Can Liu,Jie Zhang
Rational design effective and durable non-noble metal-based oxygen reduction reaction (ORR) electrocatalyst is significant and urgent. Herein, the nanostructure consisting of monomeric FePc and one-dimensional N, S co-doped carbon nanofiber (NSCNF) modified with CeO 2 was synthesized based on the rational strategy and component regulation. Specifically, the wrapped CeO 2 nanoparticles optimize the chemical environment of composite. NSCNF further modulates the electronic environment of iron centers of FePc for accelerating the electron transfer and optimizes the free energies of oxygen intermediates. The resulting FePc@CeO 2 /NSCNF provides the distinct conductive pathway, high mechanical, and chemical stability, thus preventing the aggregation and dissolution of the active Fe sites during the reaction. More importantly, the S, N-doped carbon, uniform dispersion of Fe sites, and CeO 2 synergistically contribute to the overall ORR performance. As expected, the FePc@CeO 2 /NSCNF demonstrates excellent ORR activity with the onset potential (E onset ) of 1.00 V, half-wave potential (E 1/2 ) of 0.89 V, and good durability. Furthermore, the assembled rechargeable aqueous and flexible solid-state Zn-air batteries using FePc@CeO 2 /NSCNF electrode deliver outstanding battery performance and good cycling stability, indicative of its potential feasibility for next-generation electronic devices.
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