CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Zhiping Yan,Xin Wang,Ruiding Fei,Ruixue Zhu,Jianfeng Zhao,Wenchao Wang
Developing a highly effective solar-to-H 2 conversion system is a promising strategy for carbon neutrality. Here, we report a chemically bonded Z-scheme photocatalyst by specifically linking the conduction band site of ZnIn 2 S 4 with the valence band site of Mn 0.3 Cd 0.7 S 1-x . Deviates from the typical van der Waals interactions between two semiconductors, the in-built robust binding force (Mn-S bond) and charge transfer channel facilitates the electron mobility, minimizes detrimental deep charge trapping, and prolongs the active charge lifetime from 983 ps to 4250 ps. The sulfur vacancies in Mn 0.3 Cd 0.7 S 1-x are partially refilled by atoms of the same element in ZnIn 2 S 4 during the in-situ formation of heterojunctions, which promotes and solidates the establishment of interfacial chemical bonds. The optimal photocatalyst achieves a high quantum efficiency of 32.71 % at 420 nm. This study offers a new insight into the development of Z-Scheme heterojunctions via a synergistic approach involving doping, vacancy filling and strong interfacial chemical bonds.
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高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2024
·
IF 4.1
Chenyu Wu,Xiuzhen Wang,Ying Zhu,Lei Dong,Jingjing Xu
Titanium dioxide (TiO 2 ) shows promise as an anode material for Li/Na-ion batteries due to its low cost and good cycling stability. However, the limited rate capability and poor conductivity severely limit their practical application. Herein, the nitrogen-sulfur co-doping nano TiO 2 is in-situ constructed on the Ti 3 C 2 T x MXene substrate (SN-TiO 2 @MXene) via facile partial oxidation of MXene. The introduction of S-N heteroatoms, TiO 2 @MXene heterostructures and nanostructures can enhance electronic conductivity, improve ions diffusion kinetics and promote the contribution of pseudo-capacitance. Moreover, the employment of three-dimensional conductive layered MXene parent phase as a substrate material can not only construct the conductive network but also enhance the structural stability of the electrode. The SN-TiO 2 @MXene composite achieves an impressive reversible capacity of 306 mA/g after 1500 cycles at 500 mA/g, and 241.1 mAh/g after 2000 cycles even at a high current density of 2000 mA/g in LIBs. Furthermore, this electrode exhibits a discharge capacity of 105 mAh/g after 1000 cycles at 500 mA/g in SIBs. This study demonstrates that the three-dimensional layered SN-TiO 2 @MXene composites hold promising prospects as anode materials for ion batteries, and offer valuable insights for the fabrication of titanium matrix composites with exceptional electrochemical properties.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Pengfei Wan,Xincheng Guo,Shengdong Jing,Shilan Li,Shengjun Lu,Yufei Zhang,Haosen Fan
Lithium-sulfur (Li-S) batteries present tremendous potential in promising high energy storage systems because of their high energy density and specific capacity. However, the shuttle effect and slow reaction kinetics of the intermediate lithium polysulfide (LiPSs) result in fast capacity fading. Herein, multicomponent synergy nitrogen-doped carbon nanotube (CNT) framework dotted by CoFe/FeN 0.0324 /TiN heterostructure (CoFe/FeN 0.0324 /TiN@N-CNT) were developed and prepared by in-situ nitridation approach as polysulfide mediator to simultaneously realize physicochemical adsorption and catalytic conversion of polysulfide. Transition metal nitrides, such as FeN 0.0324 , are known for their polar surfaces that can chemically adsorb polysulfides efficiently. Additionally, CoFe and TiN have been shown to catalyze polysulfide redox reactions. This understanding paves the way for the development of heterostructured CoFe/FeN 0.0324 /TiN nanoparticles that significantly enhance the immobilization, diffusion, and transformation of polysulfides. Moreover, nitrogen-doped carbon nanotubes (CNTs) decorated with bimetallic CoFe afford intriguing benefits. The CoFe alloy not only facilitates the in-situ growth of CNTs but also contributes to prominent Li + /electron conductivity. Together, CoFe and CNTs provide substantial physical confinement and catalytic sites, thereby accelerating redox kinetics and effectively mitigating the shuttle effect. Owing to these advantages, CoFe/FeN 0.0324 /TiN@N-CNT separators exhibit remarkable electrochemical properties including superior rate capacity of 738 mAh g −1 at 3C, high reversible capacity of 708 mAh g −1 at 0.5C after 400 cycles and 607 mAh g −1 at 1C after 1000 cycles with per cycle declining rate of 0.09 % and 0.048 %, respectively, and ultralong cycle life at 4C after 1000 cycle. Even with a relatively high sulfur loading of 2.3 mg, the modified batteries still exhibit a satisfactory reversible capacity at 0.5C. This work paves a unique avenue combined prudent spacial framework with heterogeneous synergy strategy for manufacturing high-energy–density Li-S batteries.
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高影响因子
Research
·
2020
·
IF 0
Jiapeng Ji,Ying Sha,Zeheng Li,Xuehui Gao,Teng Zhang,Shiyu Zhou,Tong Qiu,Shaodong Zhou,Liang Zhang,Min Ling,Yanglong Hou,Chengdu Liang
The shuttle effect hinders the practical application of lithium-sulfur (Li-S) batteries due to the poor affinity between a substrate and Li polysulfides (LiPSs) and the sluggish transition of soluble LiPSs to insoluble Li2S or elemental S. Here, we report that Ni hexatomic clusters embedded in a nitrogen-doped three-dimensional (3D) graphene framework (Ni-N/G) possess stronger interaction with soluble polysulfides than that with insoluble polysulfides. The synthetic electrocatalyst deployed in the sulfur cathode plays a multifunctional role: (i) selectively adsorbing the polysulfides dissolved in the electrolyte, (ii) expediting the sluggish liquid-solid phase transformations at the active sites as electrocatalysts, and (iii) accelerating the kinetics of the electrochemical reaction of multielectron sulfur, thereby inhibiting the dissolution of LiPSs. The constructed S@Ni-N/G cathode delivers an areal capacity of 9.43 mAh cm-2 at 0.1 C at S loading of 6.8 mg cm-2, and it exhibits a gravimetric capacity of 1104 mAh g-1 with a capacity fading rate of 0.045% per cycle over 50 cycles at 0.2 C at S loading of 2.0 mg cm-2. This work opens a rational approach to achieve the selective adsorption and expediting of polysulfide transition for the performance enhancement of Li-S batteries.
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DOI
2D Materials
·
2022
·Vol. 9
·期 2
·025028
·
IF 6.861
Meng Yuan,Haodong Shi,Cong Dong,Shuanghao Zheng,Kai Wang,Shaoxu Wang,Zhong-Shuai Wu
Some vital challenges are main obstacles for further development of lithium–sulfur (Li–S) batteries such as low capacity and poor cycle stability resulted from polysulfide shuttling behavior, the physical/chemical entrapment is regarded as an effective method to inhibit and catalyze polysulfides. Herein we design a cross-linked framework of reduced graphene oxide anchored with Cu2−xSe nanoparticles (Cu2−xSe@rGO) by building an electrolyte/Cu2−xSe/graphene triple-phase interface to be a high-efficiency electrocatalyst for Li–S batteries. Importantly, this three-dimensional conductive network possesses a large specific surface area with high ion transport capability, meanwhile providing strong physical constraint for efficient adsorption of soluble polysulfides. Further, this triple-phase catalytic interface provides strong chemical adsorption and abundant Cu2−xSe nanoparticle sulfiphilic active sites, effectively inhibiting the dissolution of polysulfides and guaranteeing the efficient polysulfide adsorption catalysis as well as rapidly uniform Li2S nucleation. Consequently, with the Cu2−xSe@rGO separator, a lower capacity decay rate about 0.059% per cycle after 500 cycles at 2 C is obtained. What's more, with a higher areal sulfur loading of 3.0 mg cm−2, the capacity is still maintained at 805 mAh g−1 over 100 cycles. Therefore, this work will open new avenue to construct 2D transition metal selenide for superior performance Li–S batteries.
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高影响因子
Frontiers of Chemical Science and Engineering
·
2025
·Vol. 19
·期 8
·1-11
·
IF 4.5
Zhang Yingqi,Chen Chao,Xie Enxue,Hu Mengping,Fu Guoying,Wang Yan,Li Liang,Yan Xianzai,Zhang Zedong,Wu Guoqiang
Microporous and mesoporous silicalite-1 (S-1) and titanium silicalite-1 (TS-1) zeolite supported molybdenum (Mo) catalysts were synthesized and applied in the transesterification of Jatropha seed oil (JO) to produce biodiesel. Various analytical results have revealed that the MoO 3 species are highly dispersed on their surface without destroying the zeolite framework and pore structure. Compared with the mesoporous 7Mo/mesoporous S-1 and 7Mo/mesoporous TS-1 catalysts, the microporous 7Mo/S-1 and 7Mo/TS-1 catalysts exhibit high Mo species contents and surface acidity, indicating that Mo species can enter the inner surface of mesoporous zeolites. However, the Mo species on the outer surface of catalysts are only activity centers owing to the accessibility between the Mo species and JO. Therefore, compared with the low activity of the S-1 and TS-1 catalysts, the 7Mo/S-1 catalyst exhibited the highest catalytic performance, with a JO conversion of 95.7% and a biodiesel selectivity of 99.9%. Finally, 7Mo/S-1 demonstrated good catalytic stability, regeneration performance and broad substrate versatility, and the fuel properties of the as-synthesized biodiesel conformed to the current international standard. The influence of the pore structure and Mo species on the catalytic activity has been clarified, providing a theoretical and practical foundation for developing efficient heterogeneous catalysts for biodiesel production.
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高影响因子
SOLAR ENERGY
·
2025
·
IF 6.6
Yan Zhu,Bin Yao,Zhanhui Ding,Yongfeng Li,Liyuan Shi,Chunkai Wang,Ding Ma,Mengge Li,Yue Liu,Ning Ding,Yuting Sun,Xiaofei Sun,Shaung Li
In this work, non-uniform Ag and In co-doped CZTSSe (NoU-Ag x In y , x = Ag/(Ag + Cu) = 0–15 %, y = In/(In + Zn + Sn) = 0–12 %) was prepared by doping Ag at the front surface of CZTSSe and doping In at the back surface of CZTSSe. CZTSSe solar cell with conventional structure but without anti-reflection layer was fabricated by using the NoU-Ag x In y as absorber (Cell-NoU-Ag x In y ). Through optimizing the Ag and In doping concentration, the highest PCE of 11.82 % was achieved in the cell-NoU-Ag x In y with x = 10 % and y = 8 %. It is higher than the highest PCE (9.05 %) of CZTSSe solar cells obtained in this work and the highest PCE (9.45 %) of uniform Ag and In co doped CZTSSe solar cells with similar doping concentrations of Ag and In. Compared to CZTSSe solar cell, the increased PCE of cell-NoU-AgIn is dominantly due to decreased J 0 , followed by increase in J L . The decrease in J 0 is mainly attributed to reduce in number of [2Cu Zn + Sn Zn ] defect clusters and of ZnSe at front interface induced by Ag doping, as well as formation of passivation field at back interface induced by In doping. The increase in J L is mainly due to increase in depletion region width induced by the Ag doping and formation of the passivation field. This study demonstrates that non-uniform Ag and In doped CZTSSe is favorable to increasing PCE of CZTSSe solar cells.
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高影响因子
Chemosensors
·
2025
·Vol. 13
·期 7
·236
·
IF 3.7
Christopher Mwanza,Lin Zhao,Qing Zhang,Shou-Nian Ding
Bisphenol S (BPS), a key ingredient in polycarbonate plastics and epoxy resins, is a known endocrine-disrupting compound that poses significant risks to human health and the environment. As such, the development of rapid and reliable analytical techniques for its detection is essential. In this work, we present a newly engineered electrochemical sensor designed for the sensitive and selective detection of BPS using a straightforward and effective fabrication approach. The sensor was constructed by grafting molecularly imprinted polymers (MIPs) onto vinyl-functionalized multiwalled carbon nanotubes (f-MWCNTs). Ethylene glycol dimethacrylate and acrylamide were used as the cross-linker and functional monomer, respectively, in the synthesis of the MIP layer. The resulting MIP@f-MWCNT nanocomposite was characterized using Fourier-transform infrared spectroscopy (FT-IR) and scanning electron microscopy (SEM). The MIP@f-MWCNT material was then combined with chitosan, a biocompatible binder, to fabricate the final MIP@f-MWCNT/chitosan-modified glassy carbon electrode (GCE). Electrochemical evaluation showed a broad linear detection range from 1 to 60 µM (R2= 0.992), with a sensitivity of 0.108 µA/µM and a detection limit of 2.00 µM. The sensor retained 96.0% of its response after four weeks and exhibited high selectivity against structural analogues. In spiked plastic extract samples, recoveries ranged from 95.6% to 105.0%. This robust, cost-effective, and scalable sensing platform holds strong potential for environmental monitoring, food safety applications, and real-time electrochemical detection of endocrine-disrupting compounds like BPS.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Yuanzhi Yue,Guozhe Sui,Yan Zhuang,Dongxuan Guo,Shuang Meng,Dantong Zhang,Xue Yang,Ning Liu,Yue Li,Jinlong Li
In this study, we developed a synergistic modulation strategy through in situ dual-anion/cation doping coupled with vacancy engineering, demonstrating a direct ammonia etching approach to synthesize Cu/S-In(OH) 3 with controlled indium vacancies (V In ) from CuInS 2 precursors. This in situ doping approach provides a uniform distribution of Cu cations and S anions throughout the material, overcoming conventional doping heterogeneity. Simultaneously, an indium vacancy (V In ) structure was precisely engineered and regulated through a growth limitation strategy. The synergistic interplay between the uniformly dispersed anions, cations and V In significantly suppresses the recombination of photogenerated carrier within In(OH) 3 , thereby allowing more carriers to participate in the surface catalytic reaction. Both experimental and theoretical analyses demonstrate that the introduction of V In into the defective states leads to a direct reduction in the band gap, significantly improving photocatalytic hydrogen evolution performance. The optimized Cu/S-In(OH) 3 with V In achieves a photocatalytic hydrogen production rate of 1.22 mmol g −1 h −1 , approximately 122 times higher than that of pure In(OH) 3 (0.01 mmol g −1 h −1 ). This work establishes a paradigm of integrating in situ doping and vacancy engineering strategies to rationally design In(OH) 3 -based materials, offering generalizable principles for advanced catalytic applications.
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高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Dongming Wang,Hao Dong,Dongyang Zhang,Chen Wang,Keren Lu,Mingxing Shi,Guolin Tong
Currently, it is a huge challenge to develop a rapid and sustainable approach to prepare N/S co-doped mesoporous-dominated hierarchical porous carbons (NSMHPC) for supercapacitors. Herein, we innovatively adopted an in-situ template-assisted self-activation strategy to exploit multiple X-NSMHPCs (X = A, M, N) from different sulfate (Al 2 (SO 4 ) 3 /MgSO 4 /(NH 4 ) 2 SO 4 ) precipitated kraft lignins (X-KLs, X = Al, Mg, NH 4 ). Compared with other X-NSMHPCs, N-NSMHPC delivered unique mesoporous-dominated hierarchical structures with excellent specific surface area (S BET ) of 622.1 m 2 /g, large pore volume (V pore ) of 0.61 m 3 /g, copious N/S content and high carbon yield of 32.8 %. Its unique tertiary pore structure and plentiful surface-exposed active sites facilitated rapid electrolyte penetration, and speedy ion insertion and extraction. As expected, N-NSMHPC delivered a superior specific capacitance of 226.6 F/g at 0.5 A/g, which was much higher than that of lignin-based or biomass-direct pyrolyzed-based PCs. When assembled as a symmetric supercapacitor, N-NSMHPC demonstrated a maximum energy density of 18.7 Wh/kg and a power density of 500 W/kg. Meanwhile, it only exhibited a 6.6 % specific capacitance drop at 20 A/g after 5000-cycle charge-discharge tests. This span-new strategy provides a green and efficient sight for designing high-yield-high performance NSMHPC for supercapacitors.
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DOI
PubMed
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2025
·
IF 2.1
Wenjie Cai,Yingchun Xie,Yutong Liu,Yang Cong,Cheli Wang
The solubility remains critical in drugs development, manufacturing, and application. S-Ketoprofen (SKTP) solubility in methanol/ethanol/2-propanol/acetone + water (278.15–318.15 K) was measured by the isothermal saturation technique. The impacts of solvent effect, Hansen solubility parameters (HSPs), and preferential solvation on solubility and model correlation were analyzed. The SKTP solubility increased with decreasing water content in alcohols–water but exhibited cosolvency at w = 0.80 in acetone–water; the maximum mole fraction solubility is 0.1072. The HSPs explained the occurrence of cosolvency molecularly (minimum Δδt = 0.08 at w = 0.80, acetone composition). The solvent effect analysis showed that solute–solvent or solvent–solvent interactions account for 63.44 and 32.60% of solvent effect. Thus, hydrogen bonding and nonspecific dipolarity/polarizability interactions dominate SKTP dissolution. The preferential solvation investigation indicated that SKTP was preferentially dissolved by cosolvents within 0.32 < x1 < 1 for methanol–water, 0.23 < x1 < 1 for ethanol–water, 0.17 < x1 < 1 for 2-propanol–water, and 0.21 < x1 < 0.55 for acetone–water but preferentially dissolved by water in other region. The correlation results suggested that the maximum values of relative average deviation and root-mean-square deviation were 4.84% and 9.45 × 10–4, thus Apelbat–Jouyban–Acree, Jouyban–Acree, and van’t Hoff–Jouyban–Acree models can correlate the solubility data accurately.
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高影响因子
DESALINATION
·
2025
·
IF 9.8
Baochuan Qi,Yu Li,Huaili Zheng,Wanying Xie,Li Li,Zhiwei Zhao
Membrane capacitive deionization (MCDI) shows potential for brackish water desalination, but is limited by inefficient electrode materials. We developed a porous carbon electrode by co-pyrolyzing exhausted reverse osmosis membranes (EROM) with organic potassium salts (PIPES-K2). Our findings show that the PIPES-K2 doping ratio impacts desalination performance more than the co-pyrolysis temperature. At a 3:1 PIPES-K2-to-EROM ratio, the NS-EROMC3 electrode achieved a salt adsorption capacity (SAC) of 32.76 mg g −1 , showing the highest performance. Surface analysis confirmed that interconnected hierarchical pores and defective edge-N/S sites in NS-EROMC3 were key to its efficiency. NS-EROMC3 demonstrated exceptional cycling stability (< 20 % capacity loss over 60 cycles) and adaptability to diluted saline-alkali soil drainage. In situ Raman and Density Functional Theory (DFT) calculations attributed this performance to carbon vacancies and enriched edge-N/S defects. The PIPES-K2 co-pyrolysis strategy was extended to other carbon precursors. This study provides a scalable method for producing high-performance MCDI electrodes while repurposing wasteful resources.
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高影响因子
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