SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Xiao Liu,Yanjun Zhang,Wuxia Zhang,Gang Cheng,Fan Tian,Wei Li,Jinyan Xiong
Solar-driven photocatalytic hydrogen production from water splitting holds significant potential in addressing the energy crisis and environmental pollution. However, rapid recombination of photogenerated carriers and insufficient surface catalytic reaction kinetics hinder the photocatalytic process. Constructing the catalytic systems with multi-channel charge-separation can effectively alleviate those issues. In this work, ternary PdO@TiO 2 -Cu 2 O composites have been synthesized through precursor calcination and low-temperature reduction, where PdO and Cu 2 O nanoparticles couple with the TiO 2 nanorods. Comparing to single TiO 2 , binary PdO@TiO 2 and TiO 2 -Cu 2 O, the PdO@TiO 2 -Cu 2 O hybrid exhibits enhanced photocatalytic hydrogen production performance (5831μmol g -1 h −1 ), with a hydrogen production rate more than three times that of single TiO 2 . Based on the band structures of TiO 2 and Cu 2 O, along with the photochemical/electrochemical, in-situ EPR, Photoluminescence (PL) tests, and work function calculations, the formation of an S-scheme heterojunction at the TiO 2 -Cu 2 O interface under light illumination facilitates the recombination of electrons in the conduction band (CB) of TiO 2 with holes in the valence band (VB) of Cu 2 O. In this regard, the established built-in electric field significantly accelerates the transfer of photogenerated charges while preserving their respective strong oxidation and reduction capabilities. Meanwhile, the introduction of PdO enriches the holes and further enhances the rate of charge separation. This S-scheme heterojunction with directional charge transfer and oxidation cocatalyst collectively form multi-channels of charge separation, optimizing charge migration and enabling efficient hydrogen production, thus improving the photocatalytic capability of pristine TiO 2 . This study provides a rational approach to construct efficient S-scheme heterojunction/oxidation cocatalyst multi-component catalytic systems for water splitting into hydrogen.
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高影响因子
JOURNAL OF DRUG TARGETING
·
2025
·
IF 3.9
Ying Fan,Chuli Liao,Jie Li,Meiling Wu,Jie Liu,Feng Li,Wen Wu
Nitric oxide (NO) is essential for wound healing, promoting angiogenesis and collagen deposition. This study investigates a novel dual-matrix nanocomposite hydrogel incorporating S-nitrosoglutathione (GSNO), a physiological NO donor, to enhance cutaneous wound healing. GSNO was encapsulated in ammonio methacrylate copolymer nanoparticles and embedded in an alginate-based matrix, achieving controlled NO release. GSNO-loaded nanoparticles were prepared using solvent displacement and solvent evaporation methods, resulting in spherical, well-distributed, and positively charged particles. These nanoparticles were cross-linked with negatively charged alginic acid to form a nanocomposite hydrogel. The hydrophobic nanoparticles protected GSNO from degradation, while the hydrophilic alginate matrix sustained the release of active GSNO for up to 10 hours, promoting hemostasis and maintaining a moist wound environment. The hydrogel exhibited good biocompatibility in human fibroblasts and significantly enhanced wound repair by promoting fibroblast formation, neovascularization, and collagen deposition, as demonstrated by hematoxylin and eosin staining and Masson’s trichrome staining. In conclusion, the GSNO-loaded nanocomposite hydrogel significantly accelerated the healing process by enhancing angiogenesis and collagen deposition, offering a promising strategy for improving wound healing.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Qi Xu,Song Wang,Yuntao Wang,Xiankun Wu,Jingtao Dai,Jianlan Liu,Dong Fang,Cheng Zhang,Shixin Sun,Tao Cheng,Hao Yang,Guodong Xu,XiaoMing Ren,Jiahui Kou
The utilization of carbon nitride (C 3 N 4 ) in photocatalytic CO 2 reduction faces obstacles due to significant charge recombination of photogenerated electron-hole pairs, limited light-harvesting capability, and a constrained surface area. In this study, S-C 3 N 4 /IL composites were synthesized by molecular docking of ionic liquids (IL) through S atoms in layered carbon nitride under environmental conditions by simple self-assembly technology to achieve efficient photocatalytic CO 2 reduction. Contrasted with pristine C 3 N 4 (1.1 μmol g -1 h −1 ), S-C 3 N 4 /IL demonstrated over a 300-fold increase in the rate of CO 2 reduction to CO (310 µmol g -1 h −1 ), achieving an approximate 100 % selectivity. Moreover, the possible reaction mechanism was proposed by in-situ infrared and DFT calculations. The remarkable photocatalytic efficacy of S-C 3 N 4 /IL can be ascribed to multiple factors: 1) augmented visible light absorption range and enhanced interfacial compatibility due to sulfur doping, fostering improved interaction between the amphiphilic ionic liquid and the hydrophobic C 3 N 4 ; 2) suppressed char + ge recombination, facilitating increased generation of abundant free radicals; 3) the Coulombic interaction between the IL’s anionic and cationic components with the formed electron-hole pairs, thereby impeding their recombination. Besides, ultraviolet photoelectron spectroscopy, fluorescence lifetime support these results. DFT calculation suggests S doping also plays a critical role in reducing free energy of *COOH formation. In addition, 13 C isotope experiment confirms the carbon source of CO from CO 2 . This proposition paves the way for enhancing the photocatalytic prowess of carbon nitride in CO 2 reduction.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Zhenlong Zhao,Shuai Xu,Ji Bian,Hongjun Wu,Xinyu Wei,Donghui Hu,Zhuo Li,Ziqing Zhang,Liqiang Jing
The construction of S-scheme heterojunction is an effective approach to achieve high-efficiency photocatalytic conversion, where efficient interfacial charge transfer plays a crucial role. Herein, two-dimensional reduced graphene oxide (rGO) modulated porphyrin copper metal–organic frameworks/BiVO 4 (Cu-MOF/rGO/BVO) S-scheme nanocomposites with wide visible-light response are manufactured for photoreduction CO 2 . The optimized one exhibits approximately 13-fold photoactivity improvement compared with the pristine BVO nanosheets in pure water system. The high photoactivity is mainly ascribed to the S-scheme charge transfer between Cu-MOF and BVO and accelerated interfacial charge transfer modulated by rGO. The introduced rGO is capable of not only forming strong chemical interactions with both Cu-MOF and BVO, but also providing “highway” for electrons transfer, efficiently strengthening the S-scheme charge transfer. Moreover, it is revealed that the porous structure and well-defined Cu 2 (COO) 4 node of Cu-MOF creates a microenvironment conducive to CO 2 activation mainly based on electrochemical reduction measurement, in situ diffuse reflectance infrared spectra and density functional theory. This work highlights the importance of interfacial charge regulation for constructing S-scheme heterojunction and presents a feasible avenue for efficient conversion of solar-to-fuels.
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高影响因子
ENVIRONMENTAL RESEARCH
·
2025
·
IF 7.7
Jiaqi Yang,Yu Yang,Kexuan Gao,Nigel J.D. Graham,Li-an Hou
Regulation of the types and content of reactive oxygen species (ROS) in advanced oxidation processes (AOPs) is regarded as a challenging task. Herein, the features of sulfur-vacancy (Sv) and nitrogen-vacancy (Nv), and cobalt (Co)/molybdenum (Mo)-bimetallic constituents were simultaneously incorporated into a novel Co-N@MoS 2 -COOH catalyst through a simple hydrothermal calcination method. The adsorption of oxygen (O 2 ) and peroxymonosulfate (PMS) was promoted by Sv/Nv, whereby the generation of superoxide radical (O 2 · - ) and singlet oxygen ( 1 O 2 ) species was induced, and the energy barrier for the formation of high-valent cobalt-oxo species (Co(IV)=O) was reduced. The decomposition of PMS was enhanced by a bimetal (Mo/Co) electronic pump and the O 2 · - , 1 O 2 , and Co(IV)=O active species degraded tetracycline (TC) together to achieve an efficient degradation rate (initial K obs = 0.490 min -1 ). The degradation intermediates and potential degradation pathways were identified, and the leaching of Co was within the acceptable range of environmental standards. Incorporation of the catalyst into a microfilter membrane achieved a 100% degradation of TC at an ultra-high membrane flux (1803.4 LMH/bar). This study provided new insights into the types of ROS regulated by bi-vacancy and bimetallic catalysts in AOP systems, with the intention of promoting a more sustainable and resource-efficient treatment technology.
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高影响因子
INTERNATIONAL BIODETERIORATION & BIODEGRADATION
·
2022
·
IF 4.907
Shunli Hu,Long Zhang,Guiping Liu,Yufeng Gan,Baozhan Wang,Fang Wang,Jiandong Jiang
Rac-dichlorprop [( R , S )-2-(2,4-dichlorophenoxy)propanoic acid], a commonly used chiral phenoxyalkanoic acid herbicide, is frequently detected in various environments, posing threats to human health and environmental safety. The ( S )-enantiomer of dichlorprop shows a lower herbicidal activity but a higher toxicity as compared to the ( R )-enantiomer of dichlorprop. It is of great importance to enantioselectively remove the non-herbicidal ( S )-dichlorprop from the rac -dichlorprop in the application sites. In this study, the dissipation of ( R )- and ( S )-dichlorprop in an agricultural soil was investigated. We found that the dissipation rate of ( S )-dichlorprop was higher than that of ( R )-dichlorprop in an agricultural soil. Although the influences of different enantiomers of dichlorprop on soil bacterial community were not different, Sphingobium was significantly enriched in the ( S )-dichlorprop-treated soil as compared to ( R )-dichlorprop, indicating that Sphingobium species played important roles in the dissipation of ( S )-dichlorprop. Furthermore, a bacterial consortium containing Sphingobium sp. strain SP-2 (enantioselectively transforming ( S )-dichlorprop to 2,4-dichlorophenol) and Sphingopyxis sp. strain DP-21 (mineralizing 2,4-dichlorophenol), which synergistically mineralized the ( S )-enantiomer of dichlorprop, was isolated from the agricultural soil. Bioaugmentation with the in-situ isolated consortium (strains SP-2 and DP-21) resulted in the enhanced removal of the non-herbicidal ( S )-dichlorprop from the soil and in the adaptation of the inoculated degrading strains. This study offers new insights into the enhanced bioremediation of the non-herbicidal ( S )-dichlorprop contaminated soils while simultaneously ensuring environmental safety and crop yield.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Shuai Yang,Dongqi Tian,Xinhao Wang,Peng Zhou,Zhaokun Xiong,Heng Zhang,Yang Liu,Gang Yao,Bo Lai
Fenton-like technology has been widely used in the field of water treatment as an advanced oxidation processes (AOPs), and a multitude of non-homogeneous catalysts have been reported effectively to enhance it. Herein, nitrogen and sulfur co-doped nanocarbon materials (NSC) was designed and synthesized, which formed a unique mesoporous structure and abundant functional groups on the surface. It exhibits superior catalytic performance to enhance the Fe(III)/H 2 O 2 system for sulfamethoxazole (SMX) degradation, k obs is 18 times higher than Fe(III)/H 2 O 2 system after the introduction of NSC under the same experimental conditions. Also, the working pH of Fe(III)/H 2 O 2 system was broadened by NSC. Quenching and probe experiments demonstrate that hydroxyl radical (∙OH) was the dominant active species. Both dissociative and surface-bound iron species were observed, which indicates direct reduction and in-situ binding of Fe(III), respectively. Further investigation found nitrogen and sulfur co-doped attribute to the formation of abundant functional groups, the C O bond and C S C bond on the surface of NSC result in the directly reduce of Fe(III), while –COOH contributes to the in-situ binding. The intermediates and possible degradation pathway of SMX degradation were proposed based on the results of liquid chromatography-quadrupole time of flight-mass spectrometer (LC-QTOF-MS). The results of cycling and co-existing ions experiments demonstrate that NSC has outstanding potential for application. This work provides a novel insight into the sustained removal of micropollutants from the aqueous environment based on the nanocarbon materials enhancing the Fenton-like oxidation.
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高影响因子
ENERGY & FUELS
·
2020
·
IF 3.421
Cheng Yang,Chengyong Shu,Zhuofan Gan,Chen Lai,Jijun Ma,Wei Tang,Yuping Wu
ZIF-8-derived Fe–N–S triple doping hollow-shell nanoparticles are prepared by the surface modification of SCN– ligands. Fe3+ ions are highly adsorbed on the SCN–-modified layer, forming a hollow-shell rhombic dodecahedron particle after pyrolysis. Doping extra S atom is found to be an effective method to increase the density of atomically dispersed active sites and boost their catalytic performance. The H-ZIF-Fe-SCN catalyst shows good bifunctional stability toward the oxygen reduction reaction and the oxygen evolution reaction in alkaline solution, the half-wave potential for the H-ZIF-Fe-SCN catalyst was recorded to be 0.889 V vs reverse hydrogen electrode, and a maximum power performance of 158.8 mW cm–2 was achieved when it was used as a cathode catalyst in zinc–air batteries.
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高影响因子
Journal of Materials Chemistry B
·
2019
·Vol. 7
·期 44
·7042-7051
·
IF 5.047
Lianjing Zhao,Zepei Wu,Guannan Liu,Huiying Lu,Yuan Gao,Fangmeng Liu,Chenguang Wang,Jiuwei Cui,Geyu Lu
Nanozymes have drawn considerable attention because of their lower cost, higher stability and convenient preparation compared to protein enzymes. In the present work, Mo, S co-doped carbon quantum dots (Mo-CQDs) as a peroxidase mimic were used to fabricate a cascade colorimetric biosensor to detect cholesterol. The Mo-CQDs possess a robust peroxidase-like activity, and they can easily catalyze 3,3,5,5-tetramethylbenzidine (TMB) to produce an oxidized TMB in the presence of H2O2. The Mo, S doping in the carbon quantum dots (CQDs) notably boosts the yield of CQDs and may facilitate the electron transfer between TMB and H2O2, which further enhances the catalytic activity of CQDs. The colorimetric biosensor based on Mo-CQDs and cholesterol oxidase exhibited excellent selectivity and high sensitivity for cholesterol in the range of 0.01–1.0 mM along with a detection limit as low as 7 μM. The total cholesterol concentration in the serum sample was measured with satisfactory results and read out by the naked eye, indicating the potential application in clinical diagnosis and portable test kits.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Xin Tao,Jingyu Ren,Danjun Wang,Hua Huang,Yani Li,Di Guo,Baoqin Shan,Yu Liu,Jian Wang,Yanzhong Zhen,Zhirui Niu
The low activity of photocatalysts is mainly due to inefficient charge separation and low production of the active species. To overcome this challenge, we constructed an S-scheme CdIn 2 S 4 /MnZnFe 2 O 4 (CIS/MZFO) heterostructure, where the strong interface of the heterostructure leads to an upshift of the d-band center. CIS/MZFO shows higher charge transfer efficiency and oxygen adsorption/activation performance compared to CIS and MZFO separately, thereby increasing the production of ·O 2 − and h + active species. As a result, it demonstrats efficient photocatalytic degradation of tetracycline hydrochloride. The optimized CIS/MZFO heterostructure also shows good tolerance to various factors, such as inorganic ions, organic acids, pH and real water environments. The heterostructure also exhibits excellent magnetic recyclability and stability. Additionally, we propose a photocatalytic degradation pathway for tetracycline hydrochloride and evaluate the ecological toxicity that may arise from intermediates. This study provides an effective approach for the design of advanced photocatalysts.
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高影响因子
Materials
·
2023
·Vol. 17
·期 1
·6
·
IF 3.4
Yu Lei,Hongdian Chen,Chenyang Shu,Changguo Chen
Developing catalysts with superior activity to hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) is equally important to the overall photoelectrochemical water splitting to produce hydrogen. In this work, bismuth oxyiodide (BiOI), iron-modified bismuth iodide Fe/BiOI, and the sulfurized S-Fe/BiOI were prepared using the solvothermal method. The three materials all have good absorption ability for visible light. The photoelectrochemical catalytic activity of BiOI to oxygen evolution reaction (OER) is significantly enhanced after iron modification, while the sulfurized product S-Fe/BiOI exhibits better catalytic activity to hydrogen evolution reaction (HER). Hence, OER and HER can be simultaneously catalyzed by using Fe/BiOI and S-Fe/BiOI as anodic and cathodic catalysts to facilitate the overall photoelectrochemical water splitting process.Keywords:bismuth oxyiodide;iron modification;sulfurization;overall water splitting;photoelectrochemical catalysis
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高影响因子
ACS Applied Energy Materials
·
2021
·
IF 6.024
Peng Zeng,Hao Yu,Hong Liu,Yongfang Li,Ziyi Zhou,Xi Zhou,Changmeng Guo,Bin Li,Manfang Chen,Zhigao Luo,Ying Wang,Baobao Chang,Xianyou Wang
The application of Li-S batteries is hampered by some unresolved issues, including the severe polysulfides shuttle effects and sluggish reaction kinetics. Hence, we designed and prepared tin oxide hydroxide quantum dots (TOH) anchored on a honeycomb porous carbon (HPC) matrix as multifunctional sulfur hosts, and deeply studied the enhancement of TOH on the reaction kinetics of Li-S battery referred to as the apparent activation energy, Li+ ion diffusion coefficient, and reaction barrier. It is proved by density functional theory that the HPC@TOH hosts have a higher binding energy to polysulfides than the simplex carbon matrix. Meanwhile, the catalytic TOH can decrease the surface active energy of the redox reaction and accelerate the conversion of sulfur-containing species. Consequently, by means of the synergistic effects of physical capture and chemical adsorption together with catalytic conversion, the comprehensive performances of Li-S batteries are distinctly promoted. In particular, a Li-S battery using HPC@TOH as a host delivers a good reversible specific capacity of 1342.95 mAh g–1 at 0.1 C. Moreover, with the current increased to 1 C, it shows a relatively satisfactory specific capacity of 918.05 mAh g–1. After 400 cycles, a competitive specific capacity of 688.54 mAh g–1 can still be maintained with a very low fading rate of 0.06% per cycle. Most importantly, when the sulfur areal loading reaches as high as 4.25 mg cm–2 and electrolyte/sulfur ratio is controlled to be as low as 7 μL mg–1, and the Li-S battery using HPC @TOH as a host can still cycle steadily more than 50 cycles at 0.2 C. Therefore, this work provides an effective manner to boost the comprehensive performance of Li-S batteries by virtue of optimizing and designing the host material with synergistic effects of physical capture, chemical adsorption, and catalytic conversion.
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