ELECTROCHIMICA ACTA
·
2024
·
IF 5.5
Shuting Luan,Shiyi Zhang,Wenhua Zhang,Shiwen Lv,Xuchun Li,Xuhua Ren,Yanqing Cong
An efficient and stable catalyst is the key to electrocatalytic hydrogen production . Herein, a bifunctional electrocatalyst is developed for electrocatalytic hydrogen production by depositing S-doped g-C 3 N 4 on Co/Ni metal-organic framework electrode (namely CoNi-MOFs/S-g-C 3 N 4 ). Compared with the original Co/Ni metal-organic framework (CoNi-MOFs), the overpotential of hydrogen production on CoNi-MOFs/S-g-C 3 N 4 is reduced by 49.5 %, the charge transfer resistance is reduced by 74.5 %, and the electrochemically active area is expanded by 60.1 times. Moreover, CoNi-MOFs/S-g-C 3 N 4 can be used as an efficient bifunctional electrocatalyst for overall water splitting. Impressively, using CoNi-MOFs/S-g-C 3 N 4 as the anode and cathode, the hydrogen yield can reach 5.513 mmol h −1 and the energy consumption is 5.822 kWh Nm −3 at a current density of 250 mA cm −2 . In addition, an in-situ overall water splitting system was designed for hydrogen production using high-salt wastewater as water source without additional pre-desalination process, which realizes green hydrogen production and reduces the cost. The hydrogen yield was hold in the range of 5.2–5.3 mmol h −1 for a week, showing excellent performance of hydrogen production and strong stability. More importantly, the system can be applied to various high-salt wastewater with wider pH and salinity, and shows promising application potential for hydrogen production in actual wastewater.
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高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2024
·Vol. 34
·期 40
·2404044
·
IF 18.5
Zhenkun Liu,Xiangli Che,Wei Wang,Gesong Huang,Wenjie Huang,Chenyu Liu,Qi Liu,Ye Zhu,Zhan Lin,Dong Luo
Lithium-rich layered oxides (LLOs) have gained significant attention due to their high capacity of over 250 mAh g −1 , which originates from the charge compensation of oxygen anions activated under high voltage. However, the charge compensation of oxygen anions is prone to over-oxidation, leading to serious irreversible oxygen release, surface-interface reactions, and structural evolution. These detriments make LLOs undergo fast voltage decay and capacity fading, which have hindered their practical applications for many years. Herein, this work develops a multifunctional co-doping strategy and constructs W─O bonds with strong bonding interaction and covalence, low bond energy Li─S bonds with non-binding electrons near the Fermi level, and continuous and homogeneous surface spinel-like layer induced by W/S co-doping. Their synergistic effect significantly mitigates the irreversible oxygen release and surface-interface reactions and improves structural stability of Li-rich layered cathodes. Thus, the designed and prepared Co-free Li-rich layered cathode (Li 1.232 Mn 0.574 Ni 0.191 W 0.003 O 1.995 S 0.005 ) delivers superior voltage and capacity stability. Its capacity retention after 400 cycles is as large as 86%, and its voltage decay rate from the 10th to the 400th cycle is only 0.626 mV cycle −1 .
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高影响因子
Journal of Environmental Chemical Engineering
·
2024
·
IF 7.4
Zhuo Zeng,Xiaoming Li,Qi Yang,Dongbo Wang,Abing Duan,Shuaijun Pan,Jiangfu Zheng
In advanced oxidation processes (AOPs) based on peroxynitrite (PMS), generating reactive radicals efficiently and consistently is challenging due to high electron occupancy and slow conversion rates of PMS. In this study, ultrathin In 2 O 3 with oxygen vacancies (Ov) was combined with ultrathin ZnAl-LDH to construct S-scheme In 2 O 3 -Ov/ZnAl-LDH-Ov heterojunctions. The presence of Ov promotes the formation of charge-transfer channels (Al-O-In bonding) at the interface of these heterojunctions, thereby reducing electron occupancy and enhancing the generation of active radicals in the InLDH/PMS/Vis system. This S-scheme heterojunction facilitates the acceleration of photogenerated electrons, leading to the rapid conversion of PMS into hydroxyl (•OH) and sulfate radicals (SO 4 - •), and promotes swift electron transfer. Consequently, the InLDH/PMS/Vis system demonstrates exceptional degradation efficiency for a wide range of organic pollutants and a high removal capacity in treating real industrial wastewater. This investigation offers a novel perspective on the coordination mechanisms between photocatalysis and PMS activation.
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高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2025
·
IF 19
Hu Li,Hongbin Lin,Xiaohui Liao,Weiqin Huang,Jinrui Cai,Limei Lin,Dong Wei,Zhiping Huang,Zhigao Huang,Shuiyuan Chen,Wei Zhang,Guilin Chen
Cadmium sulfide (CdS) persists as the standard electron transport layer (ETL) in high-efficiency Sb 2 (S,Se) 3 solar cells. However, its narrow bandgap imposes critical performance limitations through parasitic short-wavelength absorption and interface mismatch. Here, this bottleneck is shattered through an innovative in situ ozone doping strategy. This approach revolutionizes CdS ETLs by simultaneously: 1) Widening the bandgap of CdS ETL to drastically suppress parasitic short-wavelength photon loss; 2) Triggering a hexagonal-to-cubic phase transition that disrupts coherent Sb 2 O 3 impurity growth during Sb 2 (S,Se) 3 deposition; and 3) Engineering an oxygen-rich, defect-resistant FTO/CdS interface (DFT-validated), thereby slashing recombination and enabling superior carrier extraction. As a result, a certified world-record power conversion efficiency of 9.0% for carbon-based Sb 2 (S,Se) 3 solar cell is achieved ( V OC of 0.4908 V, J SC of 26.88 mA cm −2 , and FF of 68.19%) using an FTO/CdS:O/Sb 2 (S,Se) 3 /PbS/carbon configuration. This work, beyond setting a new benchmark for carbon-based Sb 2 (S,Se) 3 solar cells, shows that these devices demonstrate exceptional intrinsic stability under long-term and extreme damp-heat conditions without encapsulation, thus propelling Sb 2 (S,Se) 3 technology toward commercial viability.
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高影响因子
PLANTA
·
2016
·Vol. 243
·期 4
·1023-1039
·
IF 3.239
Mo Hui-Juan,Sun Yan-Xiang,Zhu Xiao-Li,Wang Xing-Fen,Zhang Yan,Yang Jun,Yan Gui-Jun,Ma Zhi-Ying
Main conclusion
Cotton S-adenosylmethionine decarboxylase-, rather than spermine synthase-, mediated spermine biosynthesis is required for salicylic acid- and leucine-correlated signaling in the defense response to
Verticillium dahliae . Spermine (Spm) signaling is correlated with plant resistance to the fungal pathogen Verticillium dahliae . We identified genes for key rate-limiting enzymes in the biosynthesis of Spm, namely S - adenosylmethionine decarboxylase ( GhSAMDC ) and Spm synthase ( GhSPMS ). These were found by screening suppression subtractive hybridization and cDNA libraries of cotton ( Gossypium ) species tolerant to Verticillium wilt. Both were induced early and strongly by inoculation with V. dahliae and application of plant hormones. Silencing of GhSPMS or GhSAMDC in cotton leaves led to a significant accumulation of upstream substrates and, ultimately, enhanced plant susceptibility to Verticillium infection. Exogenous supplementation of Spm to the silenced cotton plants improved resistance. When compared with the wild type (WT), constitutive expression of GhSAMDC in Arabidopsis thaliana was associated with greater Verticillium wilt resistance and higher accumulations of Spm, salicylic acid, and leucine during the infection period. By contrast, transgenic Arabidopsis plants that over-expressed GhSPMS were unexpectedly more susceptible than the WT to V. dahliae and they also had impaired levels of putrescine (Put) and salicylic acid (SA). The susceptibility exhibited in GhSPMS -overexpressing Arabidopsis plants was partially reversed by the exogenous supply of Put or SA. In addition, the responsiveness of those two transgenic Arabidopsis lines to V. dahliae was associated with an alteration in transcripts of genes involved in plant resistance to epidermal penetrations and amino acid signaling. Together, these results suggest that GhSAMDC-, rather than GhSPMS-, mediated spermine biosynthesis contributes to plant resistance against V. dahliae through SA- and leucine-correlated signaling.
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PubMed
高影响因子
JOURNAL OF POWER SOURCES
·
2025
·
IF 7.9
Lin Wu,Chunyu Ji,Xueyan Li,Zirui Liu,Hao Yang,Feng Qiu,Zhili Peng,Qingju Liu,Longzhou Zhang
Despite heteroatom doping is a smart approach to facilitate the oxygen reduction reaction (ORR) performances of nanocarbon catalysts, two dominant issues still retain as significant obstacles. One is the relatively low activity compared to benchmark catalysts, the other is the ambiguous elucidation of the catalytic mechanism for dual heteroatom-doped catalysts. Here, nitrogen and sulfur co-doped carbon-dots electrocatalyst (HT-CDs) are simply prepared by means of physical activation with water vapor on the carbon-dots precursor. The material exhibits excellent ORR performance under alkaline conditions, achieving a half-wave potential of 0.91 V (vs RHE), surpassing most metal-free catalysts and Pt/C. Further theoretical studies reveal that N/C-S-N structure fills more electrons in the anti-bond orbitals that promoting the charge transfer from the catalyst to the reactant O 2 , thus enhancing the efficient ORR process.
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高影响因子
Journal of Environmental Sciences
·
2025
·
IF 6.3
Likai Wang,Donglin Liu
The degradation of persistent organic pollutants like 4-chlorophenol (4-CP) remains a critical challenge in wastewater treatment. Transition-metal sulfides have emerged as promising Fenton-like catalysts owing to their tunable electronic structures and abundant redox-active sites. Herein, we report a highly efficient Fenton-like system using ternary copper-iron sulfide (Cu x Fe y S z ) nanocatalysts for 4-CP degradation. Three Cu x Fe y S z phases—CuFe₂S₃, CuFeS₂, and Cu₅FeS₄—were synthesized and systematically evaluated, with CuFe₂S₃ demonstrating superior catalytic activity, achieving complete degradation of 20 mg/L 4-CP within 7 min using 5 mmol/L H₂O₂. Mechanistic studies reveal that sulfur vacancies in CuFe₂S₃ serve as key features, enhancing H₂O₂ adsorption and activation, as evidenced by in situ Raman spectroscopy. Comparative studies with CuFe₂S₃ analogues (0.7-CuFe₂S₃, 0.9-CuFe₂S₃, Fe₃S₄, and Cu₈S₅) confirm the unique catalytic efficiency of stoichiometric CuFe₂S₃, attributed to its optimal electronic structure and vacancy density. This work not only presents CuFe₂S₃ as a cost-effective and high-performance Fenton-like catalyst but also lays a solid foundation for the application of naturally occurring copper-iron sulfide minerals in wastewater treatment.
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高影响因子
Journal of Water Process Engineering
·
2024
·
IF 6.3
Junhao Huang,Zhangtao Li,Shengdao Shan,Malik Tahir Hayat,Jun Meng
The escalation of metal(loid) contamination in global water poses severe risks to ecological environment safety. Meeting the ‘pollution control with waste’ strategy, we utilized eco-friendly waste tea leaf extract and walnut shell to first fabricate a greenly synthesized nanoscale zero-valent iron impregnated walnut shell biochar (G-nZVI/WSB) for the simultaneous sequestration of cadmium (Cd), lead (Pb), and arsenic (As) from aqueous systems. Since the interactions among these metal(loid)s during adsorption on G-nZVI/WSB and their corresponding mechanisms remain unclear, we conducted a series of batch experiments coupled with characterization techniques. The optimal pyrolysis temperature and Fe/C ratio for G-nZVI/WSB were determined to be 650 °C and 20 %, respectively. Under optimal conditions (contact time = 24 h, pH = 6), G-nZVI/WSB exhibited theoretical maximum adsorption capacities for Cd(II), Pb(II), and As(III) of 52.96, 135.1, and 8.414 mg g −1 , respectively, which were significantly higher than those of WSB carrier. In single and combined systems, the monolayer and chemical adsorption of metal(loid)s were predominant, with their competitive affinity for active sites following the order of Pb(II) > Cd(II) > As(III). Characterization analyses using FTIR, SEM, XRD, and XPS confirmed the specific adsorption mechanisms of G-nZVI/WSB for these metal(loid)s, including cation-π interactions, coprecipitation, oxidation, and coordinated complexation. Notably, G-nZVI/WSB exhibited excellent adsorption stability over five cycles of adsorption-desorption, which achieved the efficient purification of multi-contaminated actual wastewaters to meet the standards for wastewater discharge or drinking water. These findings demonstrate the significant potential of G-nZVI/WSB as an eco-friendly and promising nanocomposite for treating metal(loid)-contaminated wastewater.
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高影响因子
FUEL
·
2024
·
IF 6.7
Xueqing Wu,Chuntao Cao,Ruwei Yao,Tingjun Fu,Zhong Li
A core-shell structured S-1@ZSM-5 was prepared by a seed-induced method, and its physicochemical properties and catalytic performance in methanol aromatization were studied based on the growth control of ZSM-5 shell. Results revealed that the ZSM-5 shell can be well coated on the surface of the silicalite-1 (S-1) seed under a low temperature crystallization, which induced the formation of worm-like morphology with a controllable shell thickness of 30 nm. Importantly, the weak acid sites dominated by Lewis acid sites can be constructed based on the control of growth degree. For methanol aromatization, the weak acid sites not only ensured the aromatization reaction, but also inhibited the isomerization and alkylation of para-xylene. The selectivity of aromatics and para-xylene in xylene reached 25.96% and 47.53%, respectively. The thin shell promoted the rapid removal of the coke precursor, which gave the catalyst a relatively long lifetime. Interestingly, on such a shell with weak acid sites, the limited sites can be easily covered by coke deposition along with the reaction progress, and thus the para-xylene selectivity can be gradually increased to 73.81%. Additionally, protective desilication was implemented for core-shell catalysts, and the aromatic selectivity was decreased while the catalytic lifetime and para-xylene selectivity remained unchanged. This reflected the inherent catalytic stability for methanol aromatization due to the thin shell and weak acidity. This work provides a new preparation strategy for ZSM-5 with high para-xylene selectivity and catalytic lifetime based on the direct synthesis of suitable acid sites and the diffusion channels.
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高影响因子
INORGANIC CHEMISTRY
·
2024
·
IF 4.3
Alimujiang Yalikun,Yanhong Wang,Yun Lv,Yaling Dou,Hyun-Joo Koo,Jiaojiao Cao,Wei Qi,Keke Huang,Myung-Hwan Whangbo,Zhongwen Ouyang,Hongcheng Lu
A series of analogous chain selenite chlorides Ba2M(SeO3)2Cl2 (M = Cu 1, Ni 2, Co 3, Mn 4) and Pb2Cu(SeO3)2Cl2 5 with tunable spin S from S = 1/2 to S = 5/2 have been hydrothermally synthesized and characterized. These analogues crystallized in the orthorhombic Pnnm space group (monoclinic P21/n space group for 5) all containing M2+–SeO3–M2+ spin chains, which are further separated by the Ba2+ ions (Pb2+ for 5). The magnetic susceptibility results of 1, 2, and 5 show broad maxima around 80.0, 18.9, and 78.0 K, respectively, indicating good one-dimensional (1D) magnetism. Meanwhile, no long-range order (LRO) is observed down to 2 K for both 1 and 5, while the isostructural compounds 2, 3, and 4 exhibit LRO at 3.4 K, 10.8 K, and 5.7 K, respectively, which are further confirmed by the heat capacity and electron spin resonance results, as well as the observed spin-flop transitions in the M–H curves measured at 2 K below TN. The magnetizations of 1–5 at 7 T are still far from saturation. In addition, thermal stability and FT-IR and UV–vis–NIR spectroscopy of 1–5 are reported.
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高影响因子
JOURNAL OF POWER SOURCES
·
2022
·
IF 9.794
Delun Zhu,Jingchao Yuan,Tong Wang,Yang Dai,Yuqing Peng,Wenrong Li,Aijun Li,Jiujun Zhang
To improve the electrochemical performance of fluorinated carbon (CF x ) for lithium-fluorinated carbon batteries , the nitrogen and sulfur co-doped sub-fluorinated carbon cathode material (NS-sCF x ) is synthesized by a one-step method of heteroatom doping and defluorination . Experimental results confirm that nitrogen and sulfur elements are successfully doped on the surface of CF x material, and the surface fluorinated degree is reduced. DFT calculations and experimental results demonstrate that the heteroatoms co-doping and defluorination can generate a conductive interface, increase activation sites, and induce charge redistribution, producing a superior transfer rate of electrons and lithium ions . Hence, the NS-sCF x cathode material possesses excellent electrochemical properties , large specific capacity, high-rate performance, high power density, and no initial voltage delay. The Li/NS-sCF x battery delivers a specific capacity of 590.4 mAh·g −1 with a voltage plateau of 1.997 V at 20 C without initial voltage delay, corresponding to a power density is 35946 W kg −1 . Extraordinarily, an ultra-high power density of up to 107100 W kg −1 at 70 C is achieved without significantly initial voltage delay. This study reveals the functional mechanism of NS-co-doping and defluorination to improve the electrochemical performance of NS-sCF x material, which can be used as a reference for the design and development of related electrode materials .
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高影响因子
Catalysts
·
2021
·Vol. 11
·期 9
·1130
·
IF 4.146
Zhuangzhuang Zhang,Yuanyuan Zhang,Xuanxuan Han,Li Guo,Danjun Wang,Kangle Lv
The novel 2D/2D S-scheme heterostructure of BiOCl nanosheets coupled with CaIn2S4nanosheets (CaIn2S4/BiOCl-SOVs), which contains surface oxygen vacancies (SOVs), has been successfully prepared by high-temperature calcination combined with a solvothermal synthetic strategy. Under visible-light irradiation, the apparent rate constant (Kapp/mim−1) for phenol degradation on the 1 wt% CaIn2S4/BiOCl-SOVs photocatalyst is about 32.8 times higher than that of pure BiOCl. The superior performance was attributed to the synergistic effect between the SOVs, CaIn2S4, and BiOCl, which can effectively narrow the bandgap and accelerate the interfacial charge separation of CaIn2S4/BiOCl-SOVs heterojunctions. Subsequently, it significantly promotes the generation of superoxide radicals (O2−), hydroxyl radicals, and h+, which participate in the photodegradation process of phenol. The catalyst still maintained a relatively high activity after repeated tests as a demonstration of its photostability. This work successfully proposed an efficient method to design a new 2D/2D S-scheme heterostructure with SOVs as possible photocatalysts in the field of environmental remediation.
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高影响因子
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