INORGANIC CHEMISTRY
·
2024
·
IF 4.3
Weiping Liu,Zhimin Dong,Jiayu Liu,Zifan Li,Youqun Wang,Xiaohong Cao,Zhibin Zhang,Yunhai Liu
Under xenon lamps, ZnFe2O4 (ZFO) has been shown to be effective in removing uranium through photocatalysis. However, its performance is still inadequate in low-light environments due to low photon utilization and high electron–hole complexation. Herein, S-doped hollow ZnFe2O4 microcubes (Sx-H-ZFO, x = 1, 3, 6, 9) were synthesized using the MOF precursor template method. The hollow morphology improves the utilization of visible light by refracting and reflecting the incident light multiple times within the confined domain. S doping narrows the band gap and shifts the conduction band position negatively, which enhances the separation, migration, and accumulation of photogenerated charges. Additionally, S doping increases the number of adsorption sites, ultimately promoting efficient surface reactions. Consequently, Sx-H-ZFO is capable of removing U(VI) in low-light environments. Under cloudy and rainy weather conditions, the photocatalytic rate of S3-H-ZFO was 100.31 μmol/(g·h), while under LED lamps (5000 Lux) it was 72.70 μmol/(g·h). More interestingly, a systematic mechanistic investigation has revealed that S doping replaces some of the oxygen atoms to enhance electron transfers and adsorption of O2. This process initiates the formation of hydrogen peroxide, which reacts directly with UO22+ to form solid studtite (UO2)O2·2H2O. Additionally, the promising magnetic separation capability of Sx-H-ZFO facilitates the recycling and reusability of the material. This work demonstrates the potential of ZnFe2O4 extraction uranium from nuclear wastewater.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SOLID STATE IONICS
·
2024
·
IF 3
Qin Zhou,Cong Xia,Ji Li,Amei Cheng,Jianwen Liu,Hongying Liu,Lin Li,Shiquan Wang
Metal-organic framework (MOF-5) material was synthesized by solvothermal method. Porous carbon (C) and sulfur-doped porous carbon (S/C) were fabricated by calcining and vulcanization of MOF-5. X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), and Raman spectroscopy were used to characterize the crystal structure and morphology of the samples. The electrochemical performance of C and S/C materials were tested as anode materials for lithium ion batteries (LIBs) and sodium ion batteries (SIBs). The S/C exhibits the high reversible capacity (1114.8 mAh g −1 after 100 cycles at 0.1 A g −1 and 485 mAh g −1 after 500 cycles at 2.0 A g −1 ), as anode for LIBs. It behaves a reversible discharge capacity of 268.8 mAh g −1 after 100 cycles at 0.1 A g −1 and a capacity of 157 mAh g −1 after 1000 cycles at 2.0 A g −1 , as anode for SIBs. Compared with C, the electrochamical performance of S/C material is significantly improved. This is mainly because the bigger specific surface area and the doping of sulfur atoms increases the layer spacing and facilitates the kinetics of the intercalation and deintercalation of Li + and Na + ions, especially Na + ions.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2024
·
IF 5.3
Jianshuai Mu,Aizhu Peng,Xinran Wang,Jin Wang,Zengjiao Hong,Danna Guo,Shulai Lei,Jiajun Wang,En-Cui Yang
Designing low-cost and environmentally friendly oxygen evolution reaction (OER) electrocatalysts to enhance the electrocatalytic water decomposition to produce hydrogen still faces great challenges. In this work, a feasible strategy for metallic/nonmetallic elements co-doping to boost the OER catalytic properties of iron oxyhydroxide is proposed. A series of S and Cr co-doped iron oxyhydroxides nanoarrays loaded on nickel foam (Sx,Cr-FeOOH/NF) were prepared by an electrodeposition–hydrothermal method. The optimized S0.1,Cr-FeOOH/NF exhibits a superior electrocatalytic OER performance with low overpotential (235 mV at 100 mA cm–2), highly outperforming commercial RuO2. Meanwhile, the overpotential of S0.1,Cr-FeOOH/NF increases by only 4 mV after 70 h of stability testing at 100 mA cm–2, demonstrating its durability. The nanoarray with ultrathin nanosheets of S0.1,Cr-FeOOH/NF regulated by S and Cr co-doping can offer abundant active sites and also facilitate mass transportation. The density functional theory (DFT) calculation results show that S and Cr co-doping modifies the electronic structure of S0.1,Cr-FeOOH/NF, which thus optimizes the adsorption energy toward the OER intermediates, promotes the transformation of *O to *OOH (rate-determining step), and thus accelerates the OER kinetics.
研究领域:
材料科学
·
能源化学
✓ 已验证
DOI
高影响因子
RSC Advances
·
2021
·Vol. 11
·期 57
·36166-36173
·
IF 3.361
Lixiao Han,Cong Peng,Jinming Huang,Shengyao Wang,Xiaohu Zhang,Hao Chen,Yi Yang
Planting highly efficient and low-cost Ni-based noble-metal-free active sites on semiconductors is of great significance in the field of photocatalysis. Herein, taking wide visible-light-responsive 2D C3N5 as a model semiconductor, an impressive near-zero-cost 2D S-doped nickel hydroxide (S–Ni(OH)2) is grown on C3N5 ultrafast within 30 min under ambient conditions by facile reaction between extremely low-cost Ni(NO3)2 and Na2S in aqueous solution. The fabricated 2D S–Ni(OH)2–C3N5 hybrid exhibits enhanced photocatalytic performance for both H2 production from water and NO removal for air purification. The H2 production rate on S–Ni(OH)2–C3N5 is ∼7 times higher than that of Ni(OH)2–C3N5 and even slightly higher than that of Pt–C3N5, demonstrating its potential as a candidate for noble metal catalysts like Pt. In particular, an apparent quantum yield (AQY) value of 30.9% at 420 nm for H2 production is reached on 1.0 wt% S–Ni(OH)2–C3N5 due to quick internal charge transfer efficiency. In addition, ∼42% of NO can be purified in a continuous flow reaction system. This work affords a cost-efficient strategy to steer the photocatalytic property of Ni-based catalysts.
研究领域:
材料科学
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环境科学
·
化学
✓ 已验证
DOI
PubMed
高影响因子
Journal of Materials Chemistry A
·
2017
·Vol. 6
·期 4
·1551-1560
·
IF 8.867
M. Y. Gao,J. R. Zeng,Q. B. Zhang,C. Yang,X. T. Li,Y. X. Hua,C. Y. Xu
The rational design of noble metal-free electrocatalysts that are highly active, robustly stable, and capable of delivering large current densities (>500 mA cm−2) at low applied potentials (<300 mV), in particular for oxygen evolution reaction (OER), is critical for practical use in electro-driven water-splitting devices. Herein, we report a facile scalable and one-step electrochemical deposition approach for the development of a self-supported 3D nanoporous S-doped amorphous NiFe2O4/Ni3Fe composite electrode with outstanding OER electrocatalytic activity and robust durability in alkaline media. Benefiting from the 3D nanoporous architectures and their in situ growth on a highly conductive substrate, the novel S-doped NiFe2O4/Ni3Fe composite electrode offers an ideal platform for fast electron transport and efficient mass transport. It also provides abundant active surface area as well as accessible active sites for a catalytic reaction. Impressively, the S-doped composite electrode displays superior OER activity in 1.0 M KOH that compares favorably with the state-of-the-art RuO2 catalyst. Low overpotentials of 260 and 285 mV (iR corrected) are required to reach long-term stable current densities of 100 and 500 mA cm−2 for OER, respectively. The electrolyzer cell obtained by pairing this S-doped composite electrode as an anode with a Ni–Mo based cathode for overall water-splitting works efficiently in both 1.0 M (1.52 V for 10 mA cm−2 and 1.79 V for 100 mA cm−2) and 30 wt% KOH (1.69 V for 100 mA cm−2) solutions, with long durability for over 220 h. Such catalyst couple exhibits superior catalytic performance and holds great promise for potential application in electrochemical water splitting.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2020
·
IF 6.215
Wenqiang Yang,Qibo Zhang,Samarjeet Singh Siwal,Yixin Hua,Cunying Xu
Herein, S-doped Co-Fe hybrid films with unique 3D porous microsphere arrays stacked by ultrathin nanoflakes directly grown on nickel foam (Co-Fe-S NFs@MS/NF) are synthesized via a single-step co-electrodeposition strategy. The synergistic effects among Fe, S and Co enable superior oxygen evolution reaction (OER) catalytic activity in basic environments. Impressively, this hybrid material can achieve further enhanced OER catalytic performance with surface self-assembly through in-situ electrochemical oxidation activation in both gentle alkaline (GA: 1.0 M KOH at 298 K) and industrial alkaline (IA: 30 wt.% KOH at 353 K) water electrolysis conditions. The transition processes are revealed in detail regarding the chemical, structural, and catalytic properties of the catalysts served in the GA and IA conditions. The pristine quasi-amorphous Co-Fe-S is found to partially transform into crystallized Co(Fe)OOH in the GA condition, while it remains amorphous nature in the IA condition. The enhanced OER activity is attributed to the formation of active Co(Fe)OOH species with massively proliferated specific surface area, optimized electronic structure, and accelerated kinetics. The activated Co-Fe-S NFs@MS/NF exhibits excellent OER activity, achieving 10 and 500 mA cm −2 at ultralow potentials of 1.453 (iR corrected) and 1.517 V with outstanding durability in the GA and IA conditions, respectively. For full water splitting, the assembled two-electrode system based on the Co-Fe-S NFs@MS/NF anode and a Co-S based cathode affords voltages of only 1.518 and 1.685 V to robustly deliver 10 and 500 mA cm −2 in GA and IA conditions over 200 h, respectively.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2013
·
IF 3.777
Huan Wang,Xiangjie Bo,Yufan Zhang,Liping Guo
Sulfur-doped ordered mesoporous carbons (OMC-S-X) (X = 1, 2 and 3) with different sulfur contents were synthesized as metal-free electrocatalyst for oxygen reduction reaction (ORR). Transmission electron microscopy (TEM), scanning electron microscopy (SEM), energy-dispersive X-ray spectra (EDX), nitrogen adsorption–desorption, X-ray diffraction (XRD) and X-ray photoelectron spectra (XPS) were employed to confirm the characterizations of OMC and OMC-S. The prepared OMC-S-3 exhibits high electrocatalytic activity, good stability and excellent tolerance to crossover effect for ORR. The high electrocatalytic activity of OMC-S-3 for ORR can be mainly ascribed to the doping of sulfur especially the existence of sulfide groups ( C S C ) which play an important role in promoting the ORR.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2016
·Vol. 163
·期 14
·A2991
·
IF 3.014
Jia Liu,Xianyou Wang,Qun Lu,Ruizi Yu,Manfang Chen,Siyu Cai,Xingyan Wang
Nitrogen and sulfur co-doped carbons derived from chromium carbide (NSCDC) are successfully synthesized by chemical extraction of chromium atom from chromium carbide and followed by a facile hydrothermal treatment using thiourea as nitrogen and sulfur sources. The physicochemical and electrochemical properties of the as-prepared materials are characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), nitrogen adsorption/desorption isotherm, X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and Fourier infrared spectroscopy (FTIR), cyclic voltammetry (CV), galvanostatic charge/discharge tests (GCD), electrochemical impedance spectroscopy (EIS) and cycle life measurements. The results demonstrate that nitrogen and sulfur species are successfully incorporated into carbon derived from chromium carbide (CDC), and the obtained NSCDC can still maintain interconnected mesoporous carbon network which is favorable for rapid transport of electrolyte ions. Besides, NSCDC exhibits the enhanced wettability, improved conductivity and excellent supercapacitive performance generated from the incorporation of nitrogen and sulfur. The maximum specific capacitance of 281.2 F g−1 at 1 mV s−1 can be achieved for the NSCDC-4. Moreover, the NSCDC-4 supercapacitor possesses excellent cyclic stability with high capacitance retention of 95% after 6000 consecutive cycles. These exciting results reveal that NSCDC is a kind of promising electrode material for the high performance supercapacitors.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Science China-Chemistry
·
2017
·Vol. 61
·期 2
·164-171
·
IF 4.132
Huang Xueqiong,Kong Long,Huang Shouqiang,Liu Min,Li Liang
In this work, we report the synthesis of magnetic sulfur-doped Fe 3 O 4 nanoparticles (Fe 3 O 4 :S NPs) with a novel simple strategy, which includes low temperature multicomponent mixing and high temperature sintering. The prepared Fe 3 O 4 :S NPs exhibit a much better adsorption performance towards Pb(II) than bare Fe 3 O 4 nanoparticles. FTIR, XPS, and XRD analyses suggested that the removal mechanisms of Pb(II) by Fe 3 O 4 :S NPs were associated with the process of precipitation (formation of PbS), hydrolysis, and surface adsorption. The kinetic studies showed that the adsorption data were described well by a pseudo second-order kinetic model, and the adsorption isotherms could be presented by Freundlich isotherm model. Moreover, the adsorption was not significantly affected by the coexisting ions, and the adsorbent could be easily separated from water by an external magnetic field after Pb(II) adsorption. Thus, Fe 3 O 4 :S NPs are supposed to be a good adsorbents for Pb(II) ions in environmental remediation.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2019
·
IF 14.229
Yang Huang,Xuening Song,Jun Deng,Chenyang Zha,Wenjing Huang,Yunling Wu,Yanguang Li
Transition metal phosphides are arguably the most promising non-precious metal-based materials for hydrogen evolution reaction (HER). Unfortunately, their high preparation temperature usually results in particle sintering. It is challenging to achieve the ultra-dispersion of transition metal phosphide nanoparticles on conductive supports so as to enlarge their surface areas and reinforce their physical stability. In this study, we prepare fine MoP nanoparticles uniformly dispersed on hierarchical carbonaceous scaffolds by using strongly interacting Mo, P and C precursors. The resultant hybrid product possesses a three-dimensional open structure that allows a large fraction of MoP nanoparticles electrochemically accessible and suppresses their possible agglomeration during extended electrocatalysis. Electrochemical measurements show that the product has an impressive HER activity, only requiring an overpotential of 120 and 170 mV to achieve 10 mA/cm 2 in 0.5 M H 2 SO 4 and 1M KOH, respectively, as well as great cycling stability. Its performance can be further promoted via the controlled sulfur doping at surface to form molybdenum phosphosulfide, which reduces the overpotential at j = 10 mA/cm 2 to 92 mV and 158 mV for acidic and alkaline HER.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
·
2023
·
IF 4.1
Shirong Kang,Hongjie Zhu,Linhua Wang,Xiaoyan Zhao,Xianqiang Huang,Hua Yang,Mingyu Dou,Dacheng Li,Jianmin Dou
Tetracycline, a class of micropollutants, is pharmaceutically active compound which cannot be disintegrated borrowing routine treatment methods. Herein, the nano-heterostructures with strong hydrophilicity were obtained via the intervention from acetonitrile and methanol double solvent system at the room temperature. Specifically, the hydrophilic sulfur-impregnated g-C 3 N 4 coupled with 1 dimensional CeO 2 were designed for enhancing dispersity and photocatalytic activity , the results of optical properties demonstrated sulfur-impregnated samples and composites expressed the low recombination of photogenerated carriers compared to the pristine material in that the newborn N–S bonding, which was confirmed via the density functional theory computation and X-ray photoelectron spectroscopy. In this work, the impregnation strategy adopted amplified the hydrophilicity of the material, which had reference significance for the study of hydrophilic and hydrophobic regulation of nanomaterials . Besides, the photodegradation mechanism and pathway of TC was investigated via the results of radical quenching experiment and mass spectrometry analysis , respectively. This study provided a reference for the fertilization modification of intrinsic semiconductor materials under the mixed solvent system and it was contributed to the photodegradation study of TC similarly.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
·
2024
·
IF 4.2
Yajie Wang,Yanan Gao,Jingxuan Yang,Bin Liu
C 3 N 5 is emerging as an important visible light catalyst because of its narrow band gap, nontoxicity and thermal stability. Herein, sulfur-doped g-C 3 N 5 (SCN) was prepared by copolymerization of thioacetamide (TAA) and 3-amino-1,2,4-triazole (3-AT). Then copper nanoparticles (Cu NPs) were anchored onto the SCN framework, resulting in the formation of Cu/SCN. It was found that the average H 2 production rate of SCN and Cu/SCN was 0.76 and 1.34 mmol g −1 h −1 , which was much higher than that of C 3 N 5 , respectively. Acting as a new active spots, sulfur doping effectively reduces the band gap of g-C 3 N 5 , and the formation of S-Cu bonds further creates an efficient electron transport pathway. As a result, Cu/SCN possesses a broader visible light absorption spectrum, stronger reduction capability, and greater efficiency in photo-induced carrier separation and transfer. Therefore, this work introduces a novel strategy for design of high efficiency photocatalytic H 2 evolution carbon nitride through non-noble metal and sulfur anchoring junction.
研究领域:
材料科学
·
能源化学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）