CATALYSIS COMMUNICATIONS
·
2020
·
IF 3.612
Yaru Li,Xiaochao Zhang,Jianxin Liu,Yawen Wang,Yunfang Wang,Rui Li,Caimei Fan
A fish bone-like BiVO 4 film was successfully prepared in-situ on metal Bi substrate via a facile one-step hydrothermal method. The obtained BiVO 4 film exhibits excellent tetracycline photodegradation efficiency, reaching 89.7% in 240 min under visible light irradiation. Its quantum yield (6.3 × 10 −5 molecules photon −1 ) and kinetic reaction rate (7.80 μmol g −1 h −1 ) are better than most reported immobilized Bi-based systems. Finally, the formation mechanism was investigated, which suggests that OH − plays a vital role in forming BiVO 4 film by affecting the release of VO 3 − . The results of this study provide available means in the in-situ preparation of Bi-based photocatalyst film.
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DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Tingan Yao,Guohui Dong,Ying Gao,Dongfeng Sun,Hehua Zeng
This study successfully constructed a g-C₃N₄/FeOOH S-scheme heterojunction photocatalyst with lotus-leaf structural effects, addressing the challenges of insufficient oxygen and water adsorption sites and high photocurrent recombination rates in g-C₃N₄ photocatalysts. The optimized photocatalyst exhibits outstanding performance, generating hydroxyl radicals via dual pathways under visible light (generation rate: 2.8 μmol/(L·min)). The lotus-leaf effect in the composite was confirmed through morphology analysis, static water contact angle measurements, and oxygen adsorption/desorption experiments, demonstrating an 18.9-fold enhancement in oxygen capacity. In situ XPS, built-in electric field intensity measurements, and theoretical calculations confirm that the built-in electric field at the interface, directed from g-C₃N₄ toward FeOOH, drives an S-scheme charge transport pathway. This not only achieves efficient spatial separation of photogenerated carriers but also uniquely preserves the system's strongest redox capability, significantly enhancing photocatalytic efficiency. Furthermore, in situ infrared spectroscopy and electron paramagnetic resonance studies confirm the composite material's dual-channel mechanism for hydroxyl radical generation via oxygen reduction and water oxidation. This work provides robust experimental and theoretical foundations for understanding and designing S-scheme heterojunctions for dual-channel hydroxyl radical generation in photocatalysis.
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DOI
高影响因子
ACS Applied Nano Materials
·
2025
·
IF 5.5
Bojun Zhang,Mingliang Zhang,Sinong Wang,Jinchan Zhao,Zhenyu Dai,Yizhuo Li,Shiliang Mei,Wanlu Zhang,Ruiqian Guo
Paper-based cultural relics possess great historical and cultural value but are vulnerable to irreversible degradation from high-energy ultraviolet (UV) light exposure and acidification, threatening their long-term preservation. Current paper protection predominantly relies on exogenous materials with single functions, which not only provide limited protective effects but also pose a risk of secondary damage. In this study, we developed a Dual-Functional paper by directly integrating a carbon quantum dot–magnesium hydroxide (CQDs@Mg(OH)2) nanocomposite into the papermaking process, thereby endowing the paper with intrinsic resistance to both acidification and UV-induced photodegradation, which reduces the reliance on subsequent protective treatments and fundamentally enhances the paper’s longevity. The results demonstrate that the functional paper integrated with CQDs@Mg(OH)2 nanocomposites shows good structural compatibility and strong resistance to degradation. Under the conditions of both UV exposure and dry-heat aging, the functional paper demonstrates excellent resistance to photooxidative and acid-induced degradation, indicating its strong potential for extending the longevity of paper-based materials. Additionally, the fluorescent properties of CQDs reveal promising potential as optical anticounterfeiting markers. This work opens an avenue for the design of long-lasting functional paper enabled by carbon-based materials, with promising applications in the preservation of paper-based cultural heritage.
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DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2025
·Vol. 13
·期 6
·120354
·
IF 7.2
Dan Dang,Xinyi Jiang,Juncheng Zhang,Yichao Wu,Baoxin Zha,Yingying Zhao
The valorization of crude glycerol, a major byproduct of biodiesel production, into high-value chemicals is critical for sustainable biorefineries. Herein, we report a novel alkali-free and homogeneous photocatalytic strategy for selectively converting glycerol to glycolic acid (GLYA) and formic acid (FA) using H 2 O 2 as a radical initiator under 365 nm UV irradiation. By optimizing volume fraction of H 2 O 2 (3.18％), light intensity (10 W), and temperature (35 °C), 99.3 % glycerol conversion with 23.47 % GLYA yield and 22.66 % FA yield was achieved within 2 h at ambient pressure. Crucially, scavenging experiments, post-illumination reactivity studies and the electron paramagnetic resonance (EPR) spectra revealed a synergistic •OH /•O 2 ⁻/ 1 O 2 radical cycle triggered by H 2 O 2 photolysis: (1) •OH initiates glycerol oxidation to glyceraldehyde; (2) •O 2 ⁻ (generated from O 2 reduction or H 2 O 2 decomposition) produces 1 O 2, which drives selective C-C cleavage to GLYA; (3) •OH/•O 2 ⁻/ 1 O 2 cycle enables mutual regeneration of active species, sustaining oxidation even after light cessation. This autocatalytic cycle eliminates the need for strong bases or noble metals, offering a green, energy-efficient route for glycerol upcycling.
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高影响因子
Nanoscale
·
2025
·
IF 5.1
Wei Zhao,Yuxiang Yang,Yanbin Li,Yimin Liu,Yuezhou Wei,Xinpeng Wang,Deqian Zeng
The advancement of efficient photocatalysts is essential for tackling global energy and environmental issues. In this work, a unique sheet-on-sheet Cd(OH)2/CdS photocatalyst was synthesized via a facile solution strategy, demonstrating significantly improved photocatalytic performance for H2 generation and Cr(VI) reduction. The optimal 5% Cd(OH)2/CdS obtained an impressive H2 production rate of 3475 μmol·g-1·h-1 under visible light, marking a 6.3 times increase compared to CdS. Additionally, the kinetics of Cr(VI) reduction were markedly accelerated, with a rate constant of 0.2803 min-1, representing a 5.7 times improvement over pure CdS. Moreover, the 2D/2D Cd(OH)2/CdS photocatalyst exhibited exceptional stability, maintaining high photocatalytic activity over multiple reaction cycles. Experimental findings and DFT calculations revealed the charge transfer mechanism between CdS nanosheets and Cd(OH)2 cocatalyst. This work provides insights into designing high-performance CdS-based nanophotocatalysts for water splitting and environmental remediation.
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DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2015
·
IF 6.723
Longsheng Zhang,Qianwei Ding,Yunpeng Huang,Huahao Gu,Yue-E Miao,Tianxi Liu
The practical applications of transition metal oxides and hydroxides for supercapacitors are restricted by their intrinsic poor conductivity, large volumetric expansion, and rapid capacitance fading upon cycling, which can be solved by optimizing these materials to nanostructures and confining them within conductive carbonaceous frameworks. In this work, flexible hybrid membranes with ultrathin Ni(OH)2 nanoplatelets vertically and uniformly anchored on the electrospun carbon nanofibers (CNF) have been facilely prepared as electrode materials for supercapacitors. The Ni(OH)2/CNF hybrid membranes with three-dimensional macroporous architectures as well as hierarchical nanostructures can provide open and continuous channels for rapid diffusion of electrolyte to access the electrochemically active Ni(OH)2 nanoplatelets. Moreover, the carbon nanofiber can act both as a conductive core to provide efficient transport of electrons for fast Faradaic redox reactions of the Ni(OH)2 sheath, and as a buffering matrix to mitigate the local volumetric expansion/contraction upon long-term cycling. As a consequence, the optimized Ni(OH)2/CNF hybrid membrane exhibits a high specific capacitance of 2523 F g–1 (based on the mass of Ni(OH)2, that is 701 F g–1 based on the total mass) at a scan rate of 5 mV s–1. The Ni(OH)2/CNF hybrid membranes with high mechanical flexibility, superior electrical conductivity, and remarkably improved electrochemical capacitance are condsidered as promising flexible electrode materials for high-performance supercapacitors.
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高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2022
·Vol. 169
·期 6
·060538
·
IF 4.386
Jie Hu,Fei Yang,Changgan Lai,Helin Wang,Liu Nie,Jian Sun,Huan Zhou,Lixu Lei
Pb3(OH)2(CO3)2-acetylene black (BLC/AB) composite is successfully prepared by a simple and economical sonochemical method and employed as a negative additive for lead-acid batteries (LABs). The electrochemical measurements show that the obtained BLC/AB electrodes have a higher hydrogen evolution reaction (HER) overpotential compared to AB electrode. BLC/AB-2 and BLC/AB-4 battery deliver the excellent rate performance at 1C rate. What's more, acetylene black as nucleation centers of Pb3(OH)2(CO3)2 may considerably alleviate irreversible sulfation phenomenon of negative plate, thus enhancing the conductivity and extending the cycle life. Interestingly, the cycle life (1172) of BLC/AB-2 battery is 1.44 times that of the same amount of AB battery (814) at 1C rate. Therefore, the BLC/AB composite is a promising negative additive of LABs.
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高影响因子
DALTON TRANSACTIONS
·
2020
·Vol. 49
·期 24
·8226-8237
·
IF 4.174
Chen Mu,Denys S. Butenko,Ievgen V. Odynets,Іgor V. Zatovsky,Junzhi Li,Wei Han,Nickolai I. Klyui
There is wide interest in developing efficient, robust and low-cost electrode materials for the electrolysis of water to produce clean hydrogen fuel. It is especially important to improve the performance and durability of electrocatalysts for the OER. Here we have shown that the transformation of nanoparticle (n-NNP) and crystalline (c-NNP) forms of mixed phosphate Na4Ni3(PO4)2P2O7 in highly alkaline solutions occurs along various routes and provokes the generation of 2D Ni(OH)2 nanosheets or stable core(phosphate)–shell(Ni(OH)2) particles, respectively. In both cases, in the carbon matrix (through chemical and electrochemical conversion of phosphate in situ during electrolysis in a 6 M KOH or NaOH solution) stable OER electrocatalysts with low overpotentials of 250–290 mV at a current density of 10 mA cm−2 were obtained. The best candidate for the OER process is core–shell particles, which maintain overpotentials of around 250 mV in 6 M KOH for more than 3 days. The activity enhancement can be attributed to the formation of abundant NiOOH nanoparticles on the shell surface due to improved lattice matching. This report discusses future prospects for the creation of core–shell particles to reduce the overpotential of durable electrocatalysts for the OER.
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高影响因子
SOLID STATE SCIENCES
·
2023
·
IF 3.5
Ningxia Li,Qi Luo,Meiyan Cui,Zhiying Zhao,Zhangzhen He
New fluorophosphate compounds H A 5 M 6 (OH) 4 F 4 (HPO 4 ) 8 ( A = K, Rb; M = Fe, Ga) were synthesized by a fluorine-rich hydrothermal method . These compounds crystallize in the monoclinic system with a P2 1 /n space group, exhibiting an open framework structure built by [PO 3 (OH)] groups, [MO 4 (OH)F], and [MO 4 F 2 ] octahedra, where ten-membered-ring channels, eight-membered-ring channels, six-membered-ring channels, and the linear M 3+ trimers are seen. The characterizations were carried out by powder XRD , EDS , FT-IR spectra, and magnetic measurements. The results confirmed that H A 5 Fe 6 (OH) 4 F 4 (HPO 4 ) 8 ( A = K, Rb) show a quite similar magnetic behavior, possessing an antiferromagnetic ordering at 14.7 K and 15.6 K, respectively. The changes of the magnetic entropy for such antiferromagnetic orderings can be estimated as ∼10.7 J mol −1 K −1 and ∼13.4 J mol −1 K −1 .
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高影响因子
Nanoscale
·
2018
·Vol. 10
·期 45
·21284-21291
·
IF 7.233
Jiguo Tu,Haiping Lei,Mingyong Wang,Zhijing Yu,Shuqiang Jiao
The electrochemical behaviors of the ultrashort nickel phosphite nanorods supported on reduced graphene oxide (Ni11(HPO3)8(OH)6/rGO nanorods), as a candidate for cathodic applications in aluminum-ion batteries, are firstly investigated. Ni11(HPO3)8(OH)6/rGO nanorods are synthesized by a facile solvothermal process. Ni11(HPO3)8(OH)6 and Ni11(HPO3)8(OH)6/rGO cathodes both possess very high initial discharge capacities of 132.4 and 182.0 mA h g−1 at a current density of 200 mA g−1, respectively. In addition, the long-term cycling stability of the Ni11(HPO3)8(OH)6/rGO cathode is further evaluated, exhibiting a discharge capacity of 49.2 mA h g−1 even over 1500 cycles. More importantly, the redox reaction mechanism of the Ni11(HPO3)8(OH)6 cathode for aluminum-ion batteries revealed that Ni11(HPO3)8(OH)6 is partially substituted with Al3+ to form AlmNin(HPO3)8(OH)6 and metallic Ni in the nanorod-like Ni11(HPO3)8(OH)6 cathodes during the discharge process. These findings are of great significance for the further development of novel materials for aluminum-ion batteries.
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高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2020
·
IF 4.939
Yan Sang,Xi Cao,Lvxuan Wang,Gaofei Ding,Yingjie Wang,Deshuang Yu,Yanan Hao,Linlin Li,Shengjie Peng
Synthesis of highly efficient, non-noble and bi-functional electrocatalysts is exceedingly challenging and necessary for water splitting devices. In this work, three-dimensional spherical Ni(OH) 2 /NiCo 2 O 4 heterojunctions are prepared by a one-step hydrothermal method and the hybrids are explored as efficient electrocatalysts for oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) in an alkaline electrolyte via tuning different Ni/Co atomic ratios of heterojunctions . The optimized Ni(OH) 2 /NiCo 2 O 4 (S (1:1)) exhibits high electrocatalytic activity with an ultralow over-potential of 189 mV at 10 mA cm −2 for the HER. With regard to the OER, the over-potential of the as-synthesized S (1:1) heterojunction is only 224 mV at the current density of 10 mA cm −2 . The improved catalytic performance of the Ni(OH) 2 /NiCo 2 O 4 heterojunctions is attributed to the chemical synergic combining of Ni(OH) 2 and NiCo 2 O 4 , large specific surface area for exposing more accessible active sites, and heterointerface for activating the intermediates that facilitates electron/electrolyte transport. The prepared catalyst exhibits good durability and stability in HER and OER catalyzing conditions. This study provides a feasible approach for the building of highly efficient bifunctional water splitting electrocatalysts and stimulates the development of renewable energy conversion and storage devices.
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高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2021
·
IF 5.816
Wei Lai,Lihong Ge,Huaming Li,Yilin Deng,Bin Xu,Bo Ouyang,Erjun Kan
The electrochemical water splitting to produce H 2 in high efficiency with earth-abundant-metal catalysts remains a challenge. Here, we describe a simple “cyclic voltammetry + ageing” protocol at room temperature to activate Ni electrode (AC-Ni/NF) for hydrogen evolution reaction (HER), by which Ni/Ni(OH) 2 heterostructure is formed at the surface. In situ Raman spectroscopy reveals the gradual growth of Ni/Ni(OH) 2 heterostructure during the first 30 min of the aging treatment and combined with polarization measurements, it suggests a positive relation between the Ni/Ni(OH) 2 amount and HER performance of the electrode. The obtained AC-Ni/NF catalyst, with plentiful Ni–Ni(OH) 2 interfaces, exhibits remarkable performance towards HER, with the low overpotential of only 30 mV at a H 2 -evolving current density of 10 mA/cm 2 and 153 mV at 100 mA/cm 2 , as well as a small Tafel slope of 46.8 mV/dec in 1 M KOH electrolyte at ambient temperature. The excellent HER performance of the AC-Ni/NF could be maintained for at least 24 h without obvious decay. Ex situ experiments and in situ electrochemical-Raman spectroscopy along with density functional theory (DFT) calculations reveal that Ni/Ni(OH) 2 heterostructure, although partially reduced, can still persist during HER catalysis and it is the Ni–Ni(OH) 2 interface reducing the energy barrier of H∗ adsorption thus promoting the HER performance.
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高影响因子
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