JOURNAL OF ALLOYS AND COMPOUNDS
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2026
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IF 6.7
Jawad Ahmad Jrar,Muhammad Bilal,Muhammad Faizan,Bipeng Yan,Alauddin,Zia Ur Rehman,Yongcai Zhang,Kewang Zheng,Jianhua Hou
Green synthesis of 2D S-scheme NiSnO 3 /g-C 3 N 4 heterojunction photocatalyst. • Interfacial field and N-vacancies promote efficient charge separation. • Bandgap narrowing with visible-NIR light absorption confirmed by UV-Vis. • Achieved 3963 μmol g −1 h −1 H 2 evolution and 78 μmol g −1 h −1 CO 2 reduction. • Stable, scalable, and multifunctional photocatalyst for solar energy conversion. Efficient solar-driven hydrogen generation and carbon dioxide conversion are key to renewable energy and environmental remediation. Here, a porous NiSnO 3 /g-C 3 N 4 (NSO/CN) S-scheme heterojunction with engineered nitrogen vacancies and a strong interfacial electric field, yielding exceptional photocatalytic performance. The NSO/0.5-CN composite exhibits a high specific surface area and a narrowed bandgap, promoting broad visible-light absorption and abundant active sites. Charge-carrier studies confirm spatially separated electron-hole transfer via an S-scheme mechanism. As a result, hydrogen evolution reaches 3854.7 with standard deviation (SD) 108.9 µmol g −1 h −1, over five times the rate of pristine NiSnO 3, and CO 2 reduction attains 74.53 with SD 3.5 µmol g −1 h −1 , far surpassing either component alone. The strong built-in field and Nitrogen-vacancies inhibit recombination and increase redox activity, resulting in consistent performance and complete dye degradation. This study uses defect engineering and an S-scheme design to demonstrate that NiSnO 3 /g-C 3 N 4 can be engaged as a photocatalyst to generate renewable energy, utilise CO 2 , and clean up pollutants. The computational study imparts support to the innovative findings and reveals a novel method for creating multifunctional nanostructures using a green water bath. Download: Download high-res image (174KB) Download: Download full-size image The graphical abstract illustrates the S-scheme heterojunction with enhanced charge separation for multi-functional photocatalysis.
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INTERNATIONAL JOURNAL OF PHOTOENERGY
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2012
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IF 1.769
Quan Gu,Huaqiang Zhuang,Jinlin Long,Xiaohan An,Huan Lin,Huaxiang Lin,Xuxu Wang
The C-doped CdO photocatalysts were simply prepared by high-temperature solid-state process. The as-prepared photocatalysts were characterized by X-ray powder diffraction (XRD), diffuse reflectance spectroscopy (UV-Vis DRS), scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS). The results demonstrated that the carbon was doped into CdO, resulting in the red-shift of the optical absorption of CdO. The photocatalytic behavior of CdO and C-doped CdO was evaluated under the visible light irradiation by using the photocatalytic hydrogen evolution as a model reaction. The C-doped CdO photocatalysts had higher photocatalytic activity over parent CdO under visible light irradiation. The results indicated that the H2 production was due to the existence of CdS and the enhancement of visible light photocatalytic activity of H2 production was originated from the doping of carbon into the CdO lattice. The probably reaction mechanism was also discussed and proposed.
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ACS Sustainable Chemistry & Engineering
·
2023
·
IF 8.4
Zhenpu Shi,Juhong Xu,Yujiao Wang,Yudong Pang,Wanli Zhao,Hongyun Yue,Zongxian Yang,Shu-Ting Yang,Yanhong Yin
Lithium polysulfides (LiPSs) shuttling effect is the main problem to be solved for cathode materials of lithium–sulfur batteries. The adsorption and catalytic conversion of LiPSs by host materials have become the main focus of cathode materials. In this work, transition metal phosphides are combined with three-dimensional carbon nanosheets to form an efficient and stable sulfur host material. The designed composite material is effective in solving the problems of slow reaction kinetics of Li–S batteries and LiPSs shuttling. Here, through the supramolecular self-assembly process of melamine and phytic acid, combined with soluble salt template technology, N- and P-codoped three-dimensional hierarchical porous carbon materials with uniformly dispersed CoP nanoparticles were efficiently synthesized. The catalytic effect of CoP nanoparticles improves the reaction kinetics effectively of LiPS conversion. The strong polarity of CoP nanoparticles is beneficial to the adsorption of polysulfide ions. Moreover, the high specific area provides more LiPS adsorption sites, and the doping of N and P heteroatoms further increases the active sites of the composites. The experimental results and theoretical calculations show that the introduction of CoP promotes the conversion of LiPSs and accelerates the nucleation rate of Li2S, thereby improving the electrochemical performance of the composite as a sulfur host for lithium–sulfur batteries.
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ANALYTICA CHIMICA ACTA
·
2023
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IF 6.2
Yongkang Ye,Wuwen Yan,Tingting Wang,Chenlu Zhang,Kaicheng Wang,Yuexi Lu,Haisong Zheng,Yunlai Tao,Xiaodong Cao,Shudong He,Yunfei Li
Simultaneous detection of multiple foodborne pathogens is of great importance for ensuring food safety. Herein, we present a sensitive dual-channel electrochemical biosensor based on copper metal organic frameworks (CuMOF) and lead metal organic framework (PbMOF) for simultaneous detection of Salmonella typhimurium ( S. typhimurium ) and Listeria monocytogenes ( L. monocytogenes ). The MOF-based nanotags were prepared by functionalizing gold nanoparticles loaded CuMOF (Au@CuMOF) and PbMOF (Au@PbMOF) with signal DNA sequences 1 (sDNA1) and sDNA2, respectively. By selecting invA of S. typhimurium and inlA gene of L. monocytogenes as targe sequences, a sandwich-typed dual-channel biosensor was developed on glassy carbon electrodes (GCE) through hybridization reactions. The sensitive detection of S. typhimurium and L. monocytogenes was achieved by the direct differential pulse voltametric (DPV) signals of Cu 2+ and Pb 2+ . Under optimal conditions, channel 1 of the biosensor showed linear range for invA gene of S. typhimurium in 1 × 10 −14 −1 × 10 −8 M with low detection limit (LOD) of 3.42 × 10 −16 M ( S/N = 3), and channel 2 of the biosensor showed linear range for inlA gene of L. monocytogenes in 1 × 10 −13 −1 × 10 −8 M with LOD of 6.11 × 10 −15 M (S/N = 3). The dual-channel biosensor showed good selectivity which were used to detect S. typhimurium with linear range of 5−1.0 × 10 4 CFU mL −1 (LOD of 2.33 CFU mL −1 ), and L. monocytogenes with linear range of 10 − 1.0 × 10 4 CFU mL −1 (LOD of 6.61 CFU mL −1 ).
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高影响因子
Surfaces and Interfaces
·
2023
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IF 6.2
Tingyu Chen,Shuaiqi Zhao,Jiajin Lin,Yanan Chong,Yifei Li,Yun Zhao,Guangxu Chen,Yongcai Qiu
As a nontoxic and cheap catalyst, the Al 2 O 3 catalyst can be used to catalyze the propane dehydrogenation (PDH) process. However, due to its poor activity, it has been used as a catalyst carrier rather than catalysis. In this work, the experimental results indicate that γ- Al 2 O 3 -(110)-S catalysts can improve the yield of propane dehydrogenation more effectively than γ-Al 2 O 3 -(110) catalyst. We investigate the potential barrier of propane dehydrogenation reaction catalyzed by Al 2 O 3 -(110) under different conditions and found that the substitution of the S atom for partial O atom can modify the acid-base properties of the surface active site of γ-Al 2 O 3 -(110), thus reducing the reaction energy barrier. In particular, the yield of the reaction can be further improved by the active sites of oxygen vacancies generated by removing partial S atoms in γ-Al 2 O 3 -(110)-S, which is consistent with our theoretical calculation results. At the same time, theoretical calculation shows that Cu clusters can effectively remove the S atoms on the surface of γ-Al 2 O 3 -(110)-S and form oxygen vacancies. This strategy provides a new path to form oxygen vacancies on γ-Al 2 O 3 -(110), which opens up a new way for the study of propane dehydrogenation.
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CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Hongli Yang,Huilin Hou,Man Yang,Zhongli Zhu,Hui Fu,Dongdong Zhang,Yong Luo,Weiyou Yang
The selective photoreduction of CO 2 into hydrocarbon fuels, such as CH 4 , is highly desirable for sustainable energy but remains a significant challenge due to slow proton-electron transfer processes and competing intermediates. Herein, a novel NiO/MgAl-LDH (NMA-x, LDH represents layered double hydroxide) step-scheme (S-scheme) heterojunction has been engineered via in-situ anchoring MgAl-LDH nanoplates on metal–organic frameworks (MOFs) derived NiO microrods, which improves the CO 2 adsorption capability and specific surface area of NiO. The steered internal electric field in the p-n heterointerface promotes charge separation and attracts a high electron density center on the catalyst surface to favor CH 4 production. Meanwhile, S-scheme photogenerated charge transfer mechanism is proposed by in-situ X-ray photoelectron spectroscopy (XPS), in-situ diffuse reflectance infrared Fourier transform (DRIFT) spectra and density functional theory (DFT) calculation. In this process, photogenerated electrons are transferred from the conduction band (CB) of MgAl-LDH to the valence band (VB) of NiO, facilitating the CHO* species serve as the critical intermediate for producing CH 4 through desired photocatalytic CO 2 reduction. Using pure water as a proton source, the NMA-2 catalyst achieved a high CH 4 selectivity of 91.2% and a yield of 8.98 μmol∙g −1 ∙h −1 , representing significant potential for practical applications. This catalyst outperformed pristine and revitalized NiO by 4.23 and 2.07 times, respectively.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2023
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IF 6.2
Tengfei Zhang,Dan Xu,Ping Liu,Long Chen,Wen Guo,Tiantian Gu,Feng Yu,Yanyan Liu,Gang Wang
The development of economical, efficient, and durable bifunctional catalyst for overall water splitting is an attractive and challenging task. Herein, a novel defect-rich 2D/2D heterostructure is constructed by vertically growing S-doped NiMoO 4 (NiMoO 4 -S) nanosheets on nickel sulfide (Ni 3 S 2 ) nanosheet arrays supported on nickel foam (NF) using a two-step hydrothermal method. Benefiting from the hierarchical sheet-on-sheet heterogeneous nanostructure and abundant oxygen vacancies for more active sites, efficient electronic/mass transfer, and fast gas release, the synthesized NiMoO 4 -S/Ni 3 S 2 /NF electrode exhibits excellent electrocatalytic performance for HER (η 10 mA cm −2 = 107 mV) and OER (η 50 mA cm −2 = 285 mV). The alkaline water electrolyzer with NiMoO 4 -S/Ni 3 S 2 /NF as the positive and negative electrodes can provide a current density of 10 mA cm −2 with the potential of 1.52 V, which is below that of the commercial Pt||RuO 2 /NF system or many other reported systems. More importantly, the alkaline water electrolyzer offers a current density of 100 mA cm −2 at 1.85 V with outstanding durability of over 50 h. This research points to a promising route in designing transition metal-based bifunctional electrocatalysts for large-scale energy conversion applications.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2023
·
IF 6.2
Min Xie,Qiaozhen Xu,Tao Lv,Hong Liu
The search for effective and highly selective photocatalysts for CO 2 transformation is exceptionally desirable yet challenging. Herein, a novel BiVO 4 @PCN-224(Cu) heterostructure was constructed by growing BiVO 4 nanosheets on the surface of PCN-224(Cu) rods for visible-light-driven CO 2 photoreduction. The obtained BiVO 4 @PCN-224(Cu) heterostructure could selectively reduce CO 2 into CO in the absence of sacrificial reagents. The CO yield over the optimized sample reached 70.5 μmol g −1 h −1 (corresponding to an apparent quantum yield of 0.42% at 450 nm), a 5.1-fold increase over pristine PCN-224(Cu). The boosted activity of the hybrid could be credited to the S-scheme heterojunction formed at the interface of PCN-224(Cu) and BiVO 4 , which facilitated the separation of photogenerated charges and ameliorated the redox capability. In-situ XPS and hydroxyl radical determination confirmed the S-scheme charge transfer mode. This study provides a new strategy for constructing S-scheme heterojunctions involving metalloporphyrin-based metal-organic frameworks for high-performance CO 2 conversion.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2023
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IF 9.9
Chunliu Zhu,Rui Long,Liyang Zhu,Wenyu Zou,Yafei Zhang,Zongying Gao,Jing Shi,Weiqian Tian,Jingyi Wu,Huanlei Wang
Zinc ion hybrid capacitors (ZIHCs) are encouraging energy storage devices for large-scale applications. Nevertheless, the electrochemical performance of ZIHCs is often limited by the cathode materials which show low energy density and rate capability practically. One of the efficient strategies to overcome these challenges is the development of advanced carbon cathode materials with abundant physi/chemisorption sites. Herein, we develop a sulfate template strategy to prepare sulfur and oxygen doped carbon nanosheets (SOCNs) as a potential cathode active material for ZIHCs. The as-prepared SOCNs exhibit porous architectures with a large surface area of 1877 m 2 g −1 , substantial structural defects, and high heteroatom-doped contents (O: 7.9 at%, S: 0.7 at%). These exceptional features are vital to enhancing Zn ion storage. Consequently, the SOCN cathode shows a high capacity of 151 mAh g −1 at 0.1 A g −1 , high cycle stability with 83% capacity retention at 5 A g −1 after 4000 cycles, and a superior energy density of 103.1 Wh kg −1 . We also investigate the dynamic adsorption/desorption behaviors of Zn ions and anions of the ZIHCs carbon electrodes during the process of charge and discharge by ex-situ experiments. This work highlights the significance of the integration with a large specific surface area and bountiful heteroatoms in carbon electrodes for achieving high-performance ZIHCs.
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高影响因子
SOLAR ENERGY
·
2023
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IF 6.7
Chunkai Wang,Bin Yao,Yongfeng Li,Zhanhui Ding,Ding Ma,Ting Wang,JiaYong Zhang,Dongxu Zhang,Yue Liu,Ruijian Liu
The physical properties of CdS buffer layers and the interface quality between CdS layer and Cu 2 ZnSn(S,Se) 4 (CZTSSe) absorber have a significant impact on the performance of CZTSSe solar cells. In the present work, five types of CZTSSe solar cells with conventional structure (denoted as CdS- x -cells, x = 55, 60, 65, 70 and 75) were fabricated by using CdS prepared at deposition temperatures of 55, 60, 65, 70 and 75 ℃, respectively, as buffer layer, and influence mechanism of the deposition temperature of CdS layers on power conversion efficiency (PCE) of the CdS- x -cells was investigated. It is found that the PCE of the CdS- x -cells increases from 8.52% to 10.36% as the deposition temperature rises from 55 to 60 ℃ but falls from 10.36% to 7.14% from 60 to 75 ℃. The analysis on the photovoltaic and electrical parameters indicates that the increase in PCE is predominantly derived from the decreased reverse saturated current density (J 0 ), followed by the decreased series resistance (R S ) and increased shunt resistance (R Sh ). The decreased PCE with the further increasing deposition temperature is mainly contributed from the increased J 0 , followed by the decreased R Sh and photogenerated current density (J L ). The influence mechanism of deposition temperature of the CdS layer on PCE is suggested via quantitatively analysis of influence of electrical, optical properties and crystal quality of CdS prepared at various deposition temperatures on J L and electrical parameters of CdS- x -cells. This work is helpful for improvement of PCE of CZTSSe solar cells by modification of properties of buffer layer.
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OPTICAL MATERIALS
·
2023
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IF 3.9
Fang Fang,Shaohua Zhang,Chaofan Chen,Xueying Wang,Chuannan Luo,Qin Wei
Curcumin can be used to treat cancer diseases, however the side effects of excessive use are serious, and the dosage of curcumin should be accurately controlled. In this study, a fluorescence nanosensor using carbon quantum dots (N,S-CQD) embedded multifunctional molecularly imprinted polymer (N,S-CQD@MIP) composite was developed as a probe for the detection of curcumin. The N,S-CQD@MIP was synthesized by sol-gel method and found a maximum emission peak at 430 nm. The curcumin can be binded selectively by the specific interaction between recognition sites and template molecules. The corresponding sensing mechanism of N,S-CQD@MIP for the detection of curcumin is the result of fluorescence inner filter effect and the static quenching effect. The fluorescence nanosensor using N,S-CQD@MIP for the curcumin detection has a good linear relationship in the range of 0.339–136.0 μM, and the corresponding detection limit is as low as 1.357 nM. This method has been applied to detect the curcumin in real samples with the recoveries of 97.6–103.7%. These results indicate that N,S-CQD@MIP are potential sensing materials for curcumin detection.
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Polymer Chemistry
·
2023
·Vol. 14
·期 27
·3166-3174
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IF 4.6
Yumiao Su,Wenmu Li
Three types of non-conjugated homopolymer with blue light emission containing 5,11-dihydroindolo[3,2-b]carbazole derivatives in the main chain were prepared via an N–C coupling reaction. Compared with the conjugated small molecule 5,11-dihydroindolo[3,2-b]carbazole derivatives, the emission spectra showed a blue shift after the introduction of nonconjugated diphenyl sulfone as the electron-deficient unit. Meanwhile, the rigid and twisted configuration of the polymers possesses the characteristic of large steric hindrance, which can effectively avoid the aggregation-caused quenching (ACQ) phenomenon in the solid state. From a test of the redox potential and DFT calculations of the small molecular monomers and polymers, the electron distribution and the molecular orbital (HOMO–LUMO) change of 5,11-dihydroindolo[3,2-b]carbazole derivatives with the introduction of electron-withdrawing and electron-donating units was revealed. The non-conjugated polymers exhibited excellent thermal stability and solubility, endowing them with good application prospects. The resultant polymers with different side groups showed blue light emission spectra from 427 nm to 461 nm. This facile and versatile strategy to synthesize non-conjugated polymers with blue light-emission leads to a new avenue for highly efficient and stable blue OLEDs.
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危险品化学品经营许可证（带存储）