JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2025
·Vol. 36
·期 30
·1-21
·
IF 2.8
Yang Minjie,Zou Congyang,Ji Yufeng,Liu Ruijie,Xu Ying
A novel MIL-101(Fe)/Bi₂S₃ Z-scheme heterojunction with a metal–organic framework (MOF) structure was synthesized via a solvothermal method. Compared with pristine MIL-101(Fe) and pristine Bi₂S₃, this composite exhibits a significant breakthrough in degradation performance toward rhodamine B (RhB) and tetracycline hydrochloride (TCH). Specifically, it achieves a degradation efficiency of 95.7% for 20 mg/L TCH within 120 min and 98.6% for 40 mg/L RhB within 90 min.Characterizations including X-ray diffraction (XRD), scanning electron microscopy (SEM), ultraviolet–visible diffuse reflectance spectroscopy (UV–Vis DRS), and electrochemical impedance spectroscopy (EIS) confirm that the MOF structure of MIL-101(Fe) provides a stable support matrix for Bi₂S₃. Moreover, the construction of the Z-scheme heterojunction can effectively suppress the recombination of photogenerated electron–hole pairs while retaining the strongly oxidizing hydroxyl radicals (・OH) and strongly reducing superoxide radicals (・O₂⁻). More importantly, after five recycling cycles, the degradation efficiencies of the composite for TCH and RhB remain at 86.8% and 88.6%, respectively, with no obvious damage to its crystal structure after cycling. This demonstrates superior structural stability and reusability compared to most reported MOF-based photo-Fenton catalysts.
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高影响因子
ChemCatChem
·
2019
·Vol. 12
·期 5
·1376-1384
·
IF 4.495
Wen-Di Guo,Lei Liu,Shu-Qing Yang,Xiao-Chao Chen,Yong Lu,Giang VO-Thanh,Ye Liu
Graphical Synergetic catalysis : The one-pot tandem bis-alkoxycarbonylation of alkynes was accomplished over the bi-functional catalytic system containing Xantphos-modified Pd-complex and Lewis super-acid of Al(OTf) 3 . Via the synergetic catalysis, the involved Xantphos-modified Pd-complex was responsible for the activation of CO and the alkynes through coordination to Pd-center while Al(OTf) 3 was in charge of the activation of the alcohol to facilitate the formation of [Pd−H] + active species. Tandem bis-alkoxycarbonylation of alkynes allows for the preparation of 2-substituted succinates from alkynes and nucleophile alcohol via two successive alkoxycarbonylation with advantages of 100 % atomic economy and simplified one-pot operation. Herein, the one-pot tandem bis-alkoxycarbonylation of alkynes was accomplished over the bi-functional catalytic system containing Xantphos-modified Pd-complex and Lewis super-acid of Al(OTf) 3 . It was found that, via the synergetic catalysis, the involved Xantphos-modified Pd-complex was responsible for the activation of CO and the alkynes through coordination to Pd-center while Al(OTf) 3 was in charge of the activation of the alcohol to facilitate the formation of [Pd−H] + active species. The in situ high-pressure FT-IR analysis, coupled with 1 H/ 13 C NMR spectral characterizations, confirmed that the introduced Al(OTf) 3 with intensive oxophilicity (via acid-base pair interaction) was able to activate nucleophilic MeOH to be a reliable proton-donor ( i. e . hydride-source) to warrant the formation and stability of [Pd−H] + species upon the oxidation of Pd 0 by H + (Pd 0 +H + →[Pd II −H] + ). Over the developed bi-functional catalytic system, the yields of the target diesters were obtained in the range of 36∼86 % in this sequence with the wide substrate scope.
研究领域:
有机化学
·
催化化学
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高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2019
·
IF 7.65
Ningyuan Zhu,Chunquan Li,Lingjun Bu,Cilai Tang,Sichu Wang,Pengfei Duan,Lunguang Yao,Jun Tang,Dionysios D. Dionysiou,Yonghong Wu
An innovative advanced oxidation process was successfully developed to photocatalytic-degradation of estrone through the synergistic effect of biochar and Bi/Bi 2 O 3 in bismuth-containing photocatalytic biochar (BiPB). The highest reaction rate constant ( k obs ) of estrone degradation by BiPB was 0.045 min −1 under the conditions of initial concentration of estrone =10.4 μmol L −1 , [BiPB] =1 g L −1 , pH = 7.0. The k obs was almost tenfold and more than 20 times than that of biochar without bismuth impregnation and pristine Bi/Bi 2 O 3 , respectively. The best photocatalytic performance of BiPB composites for the degradation of estrone was primarily attributed to generation of OH radicals. Impregnation of bismuth helped control the concentration of persistent free radicals (PFRs) and develop a hierarchical porous structure of biochar. The presence of biochar facilitated pre-concentration estrone on BiPB and improved the separation and transfer efficiency of charge carriers. The synergistic effect between biochar and Bi/Bi 2 O 3 contributed to the generation of OH radicals for estrone degradation under neutral pH conditions. The transformation pathway of estrone was also proposed based on the measured transformation products in the presence of BiPB. The high efficiency of BiPB composites indicated that this easily-obtained material was promising for estrone-wastewater treatment applications as a low-cost composite photocatalyst.
研究领域:
环境科学
·
材料科学
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DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2017
·
IF 4.233
Tao Wang,Stephan Handschuh-Wang,Panpan Qin,Yang Yang,Xuechang Zhou,Yongbing Tang
Colloidal stability of nanoparticles with particle sizes smaller than 100 nm is a critical issue for various research areas, including material science, electronics and biomedicine. We propose a facile, fast and cost-efficient method to increase the colloidal stability by simply adding organic molecules as ligands, which adsorb to the nanoparticle surface subsequently. Citric acid , oxalic acid , glutamic acid and propylamine were found to stabilize the nanodiamond (ND) particles with a mean diameter of approx. 30–100 nm. The charge of the particles could be controlled by the pH of the dispersions and by stabilizing with carboxylic acids or amino acids mentioned above. ND particles stabilized with citric acid and oxalic acid at a pH higher than 2.5 were negatively charged, while ND dispersions stabilized with glutamic acid were charged positively below a pH of 3.2. Furthermore, the stability of the dispersion was found to be dependent on the concentration of the stabilizing agent and the pH of the dispersion. Finally, we proposed the stabilizing mechanism of ND particles with propylamine. Glutamic acid and propylamine stabilized ND dispersions can be utilized for high seeding densities on negatively charged surfaces due to the amino-groups, which can be helpful for adsorption processes in electronics and material science. Due to the high biocompatibility, non-cytotoxicity and chemical inertness of ND particles, carboxylic acids and amino acids stabilized ND particles are envisaged to be useful in the biomedical field, i.e. bio-labels, drug delivery vehicles , and effective enterosorbent.
研究领域:
材料科学
·
生物医学工程
·
化学
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Tianyu Gong,Jinyang Zhang,Yang Liu,Linrui Hou,Jianlin Deng,Changzhou Yuan
It is an enormous challenge to develop low-cost non-noble metal bi-functional catalysts toward overall water splitting. The efficient water decomposition electrocatalysts need both intrinsic activities determined by electronic structure and superb mass transfer ability. For this, in the contribution, an efficient self-supported bi-functional catalyst, i.e. , nanoscale hetero Mo 2 C-CoO encapsulated in N -doped carbon nanofibers (Mo 2 C-CoO@ N -CNFs), is designed and fabricated with facile electrospinning avenue. Density functional theory and electrochemical investigation manifest that the synergistic effect of bimetallic Mo/Co accelerates kinetics of hydrogen evolution reaction (HER) and lowers the energy barrier of oxygen evolution reaction (OER). Thanks to the structural and compositional merits, the optimized integrated Mo 2 C-CoO@ N -CNFs film demonstrates remarkable catalytic activities in both OER and HER, and renders a current density of 10 mA cm −2 at 1.56 V when used for alkaline whole water cracking. The design concept here provides insights for future rational construction of advanced water decomposition catalysts.
研究领域:
材料科学
·
电化学
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DOI
高影响因子
POLYHEDRON
·
2026
·
IF 2.6
Lan Zhou,Qindan Zheng,Luyu Tian,Yadian Xie,Dengpan Nie
Bismuth oxide (Bi 2 O 3 ) is widely used in photocatalytic oxidation degradation of organic pollutants due to its simple composition, green environmental protection and stable structure. However, the limited specific surface area (SSA) and the slow charge kinetics significantly limit its photocatalytic ability. Here, Bi 2 O 3 /MWCNTs heterojunctions were synthesized using hydroxylated multi-walled carbon nanotubes (MWCNTs-OH) as the substrate, explore the crystal growth mechanism and apply it to photocatalytic oxidation reactions. The one-dimensional (1D) structure and excellent electrical conductivity of MWCNTs-OH provide a special transport path for the spatial separation of photogenerated electrons and holes. The stable chemical properties and unique hollow cavity structure of MWCNTs-OH significantly increase the specific surface area of Bi 2 O 3 /CNTs. The optimized Bi 2 O 3 /CNT-3 demonstrated outstanding performance in the photocatalytic oxidation degradation of organic substances such as lignin and RhB. The photocatalytic activity of lignin degradation under visible light has increased by 5.8 times, and the performance of RhB removal has increased by 6.7 times.
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高影响因子
DALTON TRANSACTIONS
·
2022
·Vol. 51
·期 25
·9681-9688
·
IF 4.569
Yucheng Dong,Shan Ji,Hui Wang,Vladimir Linkov,Rongfang Wang
Metal substrates are frequently used as current collectors and supports for electrochemically active materials, but their effect on the physical and electrochemical performance of electrocatalysts is rarely investigated. In this study, the electrodeposition method was used to coat four different metal meshes with three-dimensional nickel porous structures using hydrogen bubbles as a template. The significant influence of the metal substrates on the morphology of deposited nickel was demonstrated. 3D porous structures formed on nickel, iron, copper, and titanium meshes via the hydrogen bubble template method varied significantly. It was found that differences in the physical adsorption of hydrogen and electrochemical hydrogen evolution on metal substrates are the fundamental reasons behind the diverse morphology of the coatings. Lattice matching of the substrate and the active material also plays an important role during the electrodeposition process. Electrocatalytic performance of the newly prepared materials in water electrolysis was evaluated using the hydrogen and oxygen evolution reactions (HER and OER). The results demonstrate the high electrocatalytic activity of Ni/FeM in the OER and HER, and the good stability of Ni/TiM in HER.
研究领域:
材料科学
·
电化学
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高影响因子
RESEARCH ON CHEMICAL INTERMEDIATES
·
2023
·Vol. 50
·期 1
·107-125
·
IF 3.3
Huo Quan,Zhang Xiaolin,Fu Yanfei,Zhao Jiayao,Fu Lei,Miao Jiarun,Sun Haihui,Gao Jing,Liu Suyan
In this work, CuCo@C and CuCoS@C derived from an in-situ synthesis bi-metallic MOF HKUST-1/ZIF-67 (CuCo-MOF) were successfully fabricated by calcination and hydrothermal sulfide strategies. Morphology characterization results indicated that ZIF-67 grew uniformly on the surface of HKUST-1 to form CuCo-MOF. And, benefiting from bi-metallic MOFs precursors, the formed derivatives inherited and possessed good textural properties and dispersing well metal sites, which facilitated diffusions of molecules and enhancements of catalytic performances. In addition, carbon matrix produced in the materials further accelerated electron transporting properties, boosting HER and OER activities. Accordingly, in electrolytic water evaluations, CuCo@C and CuCoS@C showed good HER and OER performance, achieving 97 mV and 180 mV of overpotential at 10 mA cm −2 in an alkaline medium, respectively. Additionally, the catalysts exhibit long-term stabilities. Thus, this study provides a rational way for designing and constructing of high-efficient catalysts for H 2 and O 2 generations from electrolytic water processes.
研究领域:
材料科学
·
电化学
·
纳米催化
·
能源化学
·
功能材料
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DOI
高影响因子
Journal of Materials Chemistry A
·
2016
·Vol. 4
·期 34
·13133-13141
·
IF 8.262
Xinzhe Li,Yiyun Fang,Shiling Zhao,Juntian Wu,Feng Li,Min Tian,Xuefeng Long,Jun Jin,Jiantai Ma
The development of metal-free catalysts for efficient catalysis of both the oxygen evolution reaction (OER) and the oxygen reduction reaction (ORR) is extremely desirable in energy technologies. Herein, nitrogen-doped mesoporous carbon nanosheet/carbon nanotube (CNT) hybrids have been synthesized by the pyrolysis of glucose, urea and CNTs. Impressively, in 0.1 M KOH, the resulting hybrids afford remarkable OER activities with a low onset potential (1.50 V vs. RHE) and an exceptional over-potential (only 320 mV at 10 mA cm−2). Moreover, the same hybrids show comparable catalytic performance but better durability compared to the benchmark Pt/C (20 wt%) catalyst for ORR. The achieved ultrahigh catalytic performance of the hybrids originates from their large specific surface area (594.1 m2 g−1), high content percentage of N doping (8.5 wt%), and mesoporous structure, which leads to fully exposed active sites, improved mass/electron transport capability, easy adsorption/release of oxygen gas bubbles, and high structural stability. This work also provides a novel concept for fabricating heteroatom doped porous carbonaceous materials with integrated and improved catalytic performance for advanced applications.
研究领域:
材料科学
·
电化学
·
能源技术
·
纳米技术
·
催化
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高影响因子
INORGANIC CHEMISTRY
·
2022
·
IF 5.436
Qiang Xian,Xin Xiao,Jiaping Yu,Yi Gan,Li Chen,Xinmiao He,Enchao Wang,Hui Dan,Lin Zhu,Yi Ding,Tao Duan
The immobilization of iodine waste suffers from serious iodine loss during heat treatment. Herein, we reported on the high iodine retention immobilization of simulated radioiodine-contaminated Bi0–SiO2 sorbent in B–Bi–Zn oxide glass using Bi2O3 as a stabilizer under a N2 atmosphere. The effects of the Bi2O3 content and sintering atmosphere on the iodine immobilization behaviors (iodine retention ratio, phase composition, microstructure, and chemical stability) were investigated. It was found that the decomposition of BiI3 was prevented by adding Bi2O3 and sintering in a N2 atmosphere. The iodine retention ratio in the obtained glass waste form was significantly enhanced with increasing Bi2O3 content and sintering in the N2 atmosphere due to the synergistic effect. The achieved record-high iodine retention (92.22 ± 2.6%) was much higher than that of conventional heat treatment route (18.01 ± 3.5%). The results demonstrated that iodine was effectively immobilized through the formation of stable BixOyI (Bi5O7I and BiOI). Furthermore, the obtained iodine waste form exhibited excellent compactness and chemical stability. Owing to its high iodine retention ratio, this route can be employed to effectively immobilize radioactive iodine.
研究领域:
材料科学
·
核废料管理
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DOI
高影响因子
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
·
2026
·
IF 5.9
Yong-Hu Ma,Zi-Yi Gao,Ying-Hong La,Fu Ma,Hong-Jian Zhao
First SnS 2 /Bi(C 2 O 4 )OH heterojunction via one-step hydrothermal method. • Sn–S–Bi bonds induce IEF for S-scheme charge transfer. • Oxygen vacancies and S-scheme synergy enhance redox ability and resist photocorrosion. • 94.3% TCH (15 mg/L) degraded in 30 min, 231-fold vs. SnS 2 . • 97.9% RhB (30 mg/L) degraded in 60 min, 17.2-fold vs. SnS 2 . This study reports the first construction of an S-scheme SnS 2 /Bi(C 2 O 4 )OH heterojunction via a one-step hydrothermal route. Combined X-ray diffraction (XRD) and Fourier transform infrared (FTIR) analyses confirm strong interfacial coupling rather than physical mixing, while scanning electron microscopy (SEM) reveals a distinctive “snow-on-petals” morphology, with SnS 2 nanoparticles uniformly dispersed on Bi(C 2 O 4 )OH nanosheets. X-ray photoelectron spectroscopy (XPS) further confirms the presence of Sn–S–Bi interfacial bonds, accompanied by localized electron redistribution, laying the chemical foundation for S-scheme charge transfer. Electron paramagnetic resonance (EPR) analysis reveals a notable increase in oxygen vacancy content. This enrichment of oxygen vacancies, together with the chemical bonding at the S-scheme heterojunction interface, synergistically suppresses SnS 2 photocorrosion. Ultraviolet–visible diffuse reflectance spectroscopy (UV–Vis DRS) shows substantially improved visible-light harvesting, and electrochemical impedance spectroscopy (EIS) and photocurrent measurements corroborate superior charge separation and transport efficiency. Interestingly, although the specific surface area of the composite (35.44 m 2 /g) is lower than that of pristine SnS 2 (103.24 m 2 /g), the composite exhibits markedly higher photocatalytic activity, indicating that the enhancement arises from interfacial charge transfer and electronic modulation rather than from surface area alone. Consequently, the 30%SnS 2 /Bi(C 2 O 4 )OH composite achieves 93.4% removal of tetracycline hydrochloride (15 mg L −1 ) within 30 min and 97.9% removal of rhodamine B (30 mg L −1 ) within 60 min, with apparent rate constants of 231 and 17.2 times those of pure SnS 2 . Radical scavenging tests identify ·O 2 − and h + as the dominant reactive species, while total organic carbon (TOC) analysis indicates a mineralization rate of 77.1% for TCH, confirming deep oxidation beyond mere decolorization. Coupled with liquid chromatography–mass spectrometry (LC–MS) elucidation of the degradation pathway, this work offers a new paradigm for the rational design of high-performance S-scheme heterojunctions through interfacial chemical bonding and defect engineering. Graphical : Photocatalytic Degradation Mechanism. Download: Download high-res image (243KB) Download: Download full-size image
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高影响因子
APPLIED SURFACE SCIENCE
·
2026
·
IF 6.6
Meiting Li,Meili Cui,Chi Zhang,Zhiwei Zhao,Mengjiao Tang,Xuejiao Wang
ZnIn 2 S 4 /WS 2 hybrid exhibits selective RhB photooxidation and electrocatalytic HER. • pH = 2 ZnIn 2 S 4 could thoroughly photobleached RhB via complete mineralization. • S-scheme ZnIn 2 S 4 /WS 2 yielded Rh-110 intermediates via N-de-ethylation. • Strong interfacial interaction of heterojunction reduced ΔG H* and ΔG H2O* . RhB molecules could be selectively photodegraded over bare ZnIn 2 S 4 (advanced oxidation) and ZnIn 2 S 4 /WS 2 heterojunctions (Rh-110 intermediates via N-de-ethylation). Adequate band structure, interface electric field and S-scheme charge transfer pathway generated more • O 2 – radicals with strong reducibility. Thus, the best R = 1:1 ZnIn 2 S 4 /WS 2 one showed ∼ 93.4% of removal efficiency toward RhB within ∼ 20 min of visible light irradiation, and RhB completely transformed into Rh-110 after 5 min of irradiation. Strong interfacial interaction between ZnIn 2 S 4 and WS 2 allowed R = 1:1 ZnIn 2 S 4 /WS 2 electrode with the smallest Tafel slope of ∼ 78.06 mV dec -1 and charge transfer resistance in alkaline KOH electrolyte, which thus enhanced hydrogen evolution reaction (HER) activity and cycling durability of ZnIn 2 S 4 . The first-principle calculations demonstrated that the ZnIn 2 S 4 /WS 2 heterojunction exerts a desirable H* adsorption–desorption kinetic. ZnIn 2 S 4 /WS 2 heterojunction possesses superior dual functionality of selective photooxidation toward RhB and electrocatalytic hydrogen evolution, which is responsible for the S-scheme charge transfer and strong interfacial interaction. The first-principle calculations demonstrated its desirable H* adsorption–desorption kinetic. Download: Download high-res image (150KB) Download: Download full-size image
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