CHINESE JOURNAL OF CATALYSIS
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2024
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IF 15.7
Lingkun Yang,Zongjun Li,Xin Wang,Lingling Li,Zhe Chen
Photocatalysts featuring S-scheme heterojunctions offer considerable potential for both the photocatalytic CO 2 conversion and the degradation of antibiotics, providing practical solutions for energy crises and environmental challenges. In this work, 1D/2D CoTiO 3 /g-C 3 N 4 (CTO/CN) S-scheme heterojunction is synthesized through electrospinning and calcination . The close interweaving of g-C 3 N 4 nanosheets around CoTiO 3 nanofibers creates ample contact areas and active sites, resulting in exceptional photocatalytic CO production capability. The optimal mass ratio of CoTiO 3 to g-C 3 N 4 is 2%, and the CO and CH 4 yields are 46.5 and 0.825 μmol g -1 h -1 . Moreover, comparing with monomeric g-C 3 N 4 , this composite achieves a better CO yield with 43.5 times and displays an impressive product selectivity of 98.3% for CO 2 -CO photoreduction . In addition, the 2% CTO/CN photocatalyst demonstrates outstanding photocatalytic degradation efficiency, with degradation rates of 95.88%, 95.53%, and 71.23% for tetracycline hydrochloride , oxytetracycline , and ofloxacin , respectively. These enhanced photocatalytic properties are attributed to the S-scheme system constructed by CoTiO 3 with g-C 3 N 4 , maintaining strong oxidation-reduction capabilities while efficiently segregating photogenerated charges, with the existence of S-scheme heterojunction confirmed through various analyses. Furthermore, in situ studies and 13 C calibration experiments reveal that CO and CH 4 originate from the photocatalytic CO 2 conversion, further highlighting the potential of this work in advancing CO 2 photoreduction . This study offers novel insights into designing effective S-scheme heterojunction photocatalysts for practical applications to address environmental and energy challenges.
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高影响因子
Energy & Environmental Science
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2024
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IF 32.4
Cong Liu,Anweng Gong,Chen Zuo,Tao Liu,Xiaoyang Liang,Donglou Ren,Kai Shen,Jianzha Zheng,Qifan Xue,Zhiqiang Li,Ruud E. I. Schropp,Bingsuo Zou,Yaohua Mai
High-quality heterojunctions are crucial for achieving high power conversion efficiency (PCE) in the antimony selenosulfide (Sb2(S,Se)3) solar cells. Here, we introduce lithium fluoride (LiF) doping of the precursor solution to improve the conductivity, morphology, and n-type characteristics of cadmium sulfide (CdS) films. In addition, Li-ions have high mobility, which enhances in situ diffusion into the Sb2(S,Se)3 absorber layer during subsequent hydrothermal deposition. Li effectively passivates selenium vacancies (VSe) and antimony anti-site (SbS) defects through the formation of Li–S(e) bonds. This lithiation process not only realizes a twofold optimization of the CdS buffer layer and the Sb2(S,Se)3 absorber layer, but also yields a favorable energy level arrangement and a wider depletion region at the CdS/Sb2(S,Se)3 heterojunction. By this way, we have achieved a champion PCE of 10.76% compared to a certified value of 10.50% for Sb2(S,Se)3 solar cells, which is the highest certified efficiency reported for Sb-based solar cells so far. This study provides a convenient method to optimize dual functional layers and heterojunctions for high-performance Sb2(S,Se)3 solar cells.
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ACS Applied Nano Materials
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2024
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IF 5.3
Hong Chen,Wanying Zhang,Yinshuang Pang,Zhi Liu,Ran Chen,Jing Zheng,Zixia Lin,Qingxue Lai
With the increasing demand for high-performance energy storage devices, potassium-ion batteries (PIBs) have attracted significant interest due to their large storage capacity, affordability, and high energy density. However, the large radius of potassium ions necessitates strong structural stability in the anode material to sustain long-term cycling. In this work, a self-templated nitrogen/sulfur co-doping carbon anode material was designed and synthesized using thiourea as both the doping source and template. This approach facilitated the incorporation of nitrogen and sulfur heteroatoms while creating a highly ordered structure during the carbonization process. The experimental results demonstrated that the additional S doping not only elevated the N doping level to provide more K-storage sites, which improved the specific capacity, but also increased the carbon stacking order to improve the stability of the PIBs. The N/S co-doping also encouraged the formation of a high-ionic conductivity SEI film for fast interfacial kinetics. The prepared anode demonstrated its great potential as an anode material for PIBs by delivering high capacities of 327 mAh g–1 at 50 mA g–1 and maintaining excellent cycling stability, which achieved 179 mAh g–1 after the long 2000 cycles at a high current density of 1000 mA g–1. This study provided some good ideas and methods for the development of high-performance anode materials for PIBs.
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Surfaces and Interfaces
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2024
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IF 5.7
Qinghua Liu,Xintong Yao,Xujing Zhao,Feiyang Zhang,Dafeng Zhang,Junchang Liu,Peiqing Cai,Xipeng Pu
Photocatalytic degradation stands as an effective remedy to solve the global environmental pollution caused by organic pollutants. In this study, we synthesized a NiFe layered double hydroxide/Bi 2 WO 6 (NF-LDH/BWO) Step-scheme (S-scheme) heterojunction. The attachment of NF-LDH particles on flower-like BWO increased the active sites and the interface area between two pure materials. The construction of LDH/BWO heterojunction endowed with improved light absorption capacity and boosted separation efficiency of photo-generated carriers. Consequently, compared with BWO and NF-LDH, the NF-LDH/BWO composites showed enhanced photoactivities. At NF-LDH mass ratio of 10%, the optimal degradation rate of ciprofloxacin (75.9%) within 60 min under visible illumination was achieved, 1.43- and 9.37-fold those of BWO and NF-LDH, respectively. In addition, the NF-LDH/BWO composite also demonstrated excellent cyclic stability. The S-scheme mechanism was proposed based on both experimental and density functional calculation results.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
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2024
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IF 13.3
Jia Zhang,Jiliang Ma,Rui Cui,Weikang Ling,Min Hong,Runcang Sun
Promoting interfacial separation and charge transfer within S-scheme heterojunctions is crucial for effectively enhancing photocatalytic H 2 production. Here, we have successfully synthesized flower-shaped CoP@MoS 2 -x S-scheme heterojunction photocatalysts through a straightforward thermal annealing and hydrothermal process. These photocatalysts demonstrated exceptional performance in H 2 generation assisted by biorefinery. The optimal CoP@MoS 2 -2 photocatalyst achieved an H 2 evolution rate of 4339.39 μmol g −1 h −1 , which is 8 and 5.5 folds of individual CoP and MoS 2 , respectively. Meanwhile, the system was accompanied by 81.0 % yield of lactic acid, which is higher than those of CoP and MoS 2 . The enhanced photocatalytic performance of CoP@MoS 2 -x heterojunctions stems primarily from their unique S-scheme charge carrier transport mechanism. This S-scheme heterojunction structure not only boosts the separation efficiency of photogenerated electron-hole pairs but also preserves a robust photocatalytic redox capacity. This study provides a new avenue for designing efficient photocatalysts of H 2 generation assisted by biomass oxidation.
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RESEARCH ON CHEMICAL INTERMEDIATES
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2024
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IF 2.8
Guo Yaping,Li Jing,Zhang Jin,Wang Xiujv
The photocatalyst S-scheme BiFeO 3 –g-C 3 N 4 had been prepared by combining calcination and hydrothermal reaction. 10% BiFeO 3 –g-C 3 N 4 composite showed the greatest photocatalytic effect during tetracycline hydrochloride degradation (TC-HCl, 99.7% removal) within 100 min. Meantime, the photocatalytic efficacy was further confirmed by the removal efficiency of ciprofloxacin(CIP, 98.2% removal). The formation of S-scheme heterostructure and matching valence band and conduction band may be responsible for the improved photocatalytic efficiency of BiFeO 3 –g-C 3 N 4 . This leads to the rapid separation of photo-induced carriers, increased electronic transport capacity, and extended carrier lifetime. A study was done on the potential mechanism by employing chemical scavenger experiment revealing the paramount role of O 2 − . The composite could maintain photocatalytically stable even after five consecutive reaction cycles. The recovery efficiency of 10% BiFeO 3 –g-C 3 N 4 was high because of the magnetic property of BiFeO 3 , which was convenient for the recycling process. The produced photocatalyst has potential use in the field of photocatalysis, and this work provides a novel thought to raise the photocatalysts recovery efficiency during recycling.
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BIOMACROMOLECULES
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2024
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IF 5.5
Zhimin Luo,Yunan Yuan,Ling Li,Dayang Xie,Chong Liu,Tong Li,Zhaopei Guo,Kai Hao,Yanhui Li,Huayu Tian
Poly(amino acid)s (PAAs) are one kind of favorable biopolymer that can be used as a drug or gene carrier. However, conventional ring-opening polymerization of PAAs is slow and needs a strict anhydrous environment with an anhydrous reagent as well as the product without enough high molecular weight (Mn), which limits the expanding of PAAs’ application. Herein, we took BLG-NCA as the monomer to quickly synthesize one kind of high Mn amphiphilic copolymer, poly(ethylene glycol)-b-poly(γ-benzyl-l-glutamic acid) (PEG-PBLG), by relay polymerization with a simple one-pot method within 3 h in mild conditions (open air, moisture insensitive). In the polymerization process, ring-opening polymerization-induced self-assembly in sodium bicarbonate aqueous solution first occurred to obtain low Mn PEG-PBLG seeds without purification. Then γ-benzyl-l-glutamate N-carboxyanhydride (BLG-NCA) dichloromethane solution was added into PEG-PBLG seeds directly and stirred vigorously to form am emulsion; during this process, the amphiphilic PEG-PBLG seeds will anchor on the interface of DCM and water to ensure the concentration of α-helix rigid PBLG in DCM to maintain the following relay polymerization. Then, high Mn PEG-PBLG was obtained in mild conditions in one pot. We found that the α-helix rigid structure was essential for relay polymerization by studying the synthetic speed of amphiphilic copolymer with different secondary structures. MOE simulation results showed that PBLG and BLG-NCA tended to form a double hydrogen bond, which was beneficial to relay polymerization because of higher local concentrations that can produce more double hydrogen bonds. Our strategy can quickly obtain high Mn PEG-PBLG (224.9 KDa) within 3 h from PEG-NH2 and BLG-NCA in one pot and did not need an extra initiator. After deprotection, the poly(ethylene glycol)-b-poly(l-glutamate acid) (PEG-PGA) with high Mn as a second product can be used as an excellent antitumor drug carrier. The high Mn PEG-PGA can achieve an encapsulation rate of 86.7% and a drug loading rate of 47.3%, which is twice that of the low Mn PEG-PGA. As a result, the synthesis of PEG-PBLG by relay polymerization simplified the process of PEG-PAA polymerization and increased the Mn. In addition, this method opened a way to obtain other kinds of high Mn PEG-PBLG values in the future.
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PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2025
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IF 9.7
Ziwei Zhao,Haoyun Dou,Xuanpan Xu,Rongjie Zhe,Qingye Zhao,Lingxia Zheng,Xinjun Bao,Ting Zhu,Hong-En Wang
Rational design of effective cathode host materials is an effective way to solve the problems of serious shuttle and slow conversion of polysulfides in lithium-sulfur batteries (LSBs). However, the redox reaction of sulfur differs from conventional “Rocking chair” type batteries and involves a cumbersome phase transition process, so a single-component catalyst cannot consistently and steadily enhance the reaction rate throughout the redox process. In this work, a hybrid composed of magnetopyrite Fe 1−x S catalyst-modified with N/S-doped porous carbon spheres (Fe 1−x S@NSC) is proposed as a novel sulfur host to synergistically promote the adsorption and redox catalysis conversion of polysulfides. In this hybrid, the NSC skeleton provides excellent electrical conductivity and abundant adsorption sites for the physical immobilization of polysulfides; the magnetopyrite Fe 1−x S nanoparticles promote the fast conversion reaction from Li 2 S 2 to Li 2 S, affording strong adsorption and catalytic conversion. The optimal LSB with Fe 1−x S@NSC manifests a high initial capacity of 971 mAh g −1 at 0.2 C (1 C = 1675 mAh g −1 ) and a retention rate of up to 75 % after 100 cycles. This work can provide a new approach for rationalizing the novel transition metal sulfide/porous carbon-based composite hosts with efficient lithium polysulfides (LiPSs) adsorption and catalytic conversion in high-performance lithium-sulfur batteries.
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高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2025
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IF 3.9
Biao Guo,Xianyu Wang,Xia Wu,Xinying Sun,Xinyuan Li,Xinxin Liu,Lijing Zhou,Zhen Zhao
The construction of S-scheme heterojunctions with oxygen vacancies (OVs) is an effective strategy to enhance the photocatalytic activity. In this pioneering study, we successfully fabricated Bi12O17Cl2/Bi2S3 S-scheme heterojunctions with abundant OVs (ROV-BOC/BS) using an anion exchange method. The in situ growth of Bi2S3 (BS) nanorods on OVs-rich Bi12O17Cl2 (ROV-BOC) nanosheets resulted in an interconnected reticulated structure. This structure not only increased the specific surface area of the composite but also established a tightly bound heterojunction, further enhancing the OVs content in the composites. The OVs-induced defect levels provide additional channels for photogenerated charge migration. The synergy between the heterojunction and OVs improved the light absorption and carrier separation efficiency. Consequently, the optimized ROV-BOC/BS-0.1 achieved 95.52% Cr(VI) removal efficiency within 120 min, with apparent reaction rate constants 5.39 and 23.86 times higher than those of pure ROV-BOC and BS, respectively. This investigation provides crucial guidance for designing novel S-scheme heterojunction photocatalysts with abundant OVs.
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高影响因子
JOURNAL OF MEMBRANE SCIENCE
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2024
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IF 8.4
Ziliang Li,Li Gao,Jie Liu,Wanting Chen,Xiangcun Li,Xuemei Wu,Xiaobin Jiang,Gaohong He,Xiaoming Yan
Exploring anion exchange membranes (AEMs) with high conductivity and satisfactory stability is very meaningful for the advancement of alkaline fuel cells. Herein, a novel class of intrinsic microporous AEMs with pendent piperazinium are systematically fabricated for alkaline fuel cell performance testing. Contorted and rigid spirobisindane backbone structure expands the free volume of AEMs, inducing broad and interconnected ion transport channels. This unique feature endows membranes a leading advantage for the efficient transmission of hydroxide ions. Consequently, the prepared membrane displays excellent normalized hydroxide conductivity of 78.99 mS g cm −1 mmol −1 at 80 °C. Meanwhile, the hydroxide conductivity degrades by only 8.3 % after treatment in 1 M NaOH for 1000 h at 80 °C. Moreover, the peak power density of H 2 /O 2 single cell employing this membrane exhibits 1.06 W cm −2 at 80 °C and the cell can preserve 93.0 % of its initial voltage after operating for 18 h.
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CHEMICAL ENGINEERING JOURNAL
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2024
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IF 13.3
Jiaxin Luo,Yang Qin,Dongbin Zhang,Tong Dou,Meina Tan,Fazhi Zhang,Xuhui Zhao,Yiping Wang,Lirong Zheng,Xiaodong Lei
Due to the modification of anions, an electron redistribution occurs at the metal ions can affect the electronic structure, and induce excellent specific capacity. Herein, we report an effective and low time-consuming method by in-situ wet chemical reduction at room temperature to construct S-modified Cu/Cu 2 O negative electrode material. Moreover, the sulfur can occupy partial O sites in Cu 2 O to play a crucial role in the electronic structure of the material, demonstrated by DFT calculation, XRD, XPS and XAS measurements. The prepared S-Cu/Cu 2 O samples exhibit excellent electrochemical performance with high specific capacity of 669 mAh·g −1 at 1 A·g −1 , even 450 mAh·g −1 at 10 A·g −1 . When the materials are composed as pseudo capacity-type cathode//battery-like anode (MnO 2 //S-Cu/Cu 2 O), and (+) battery-type//battery-type (-) (Ni-Cu hydroxide/Cu(OH) 2 /CF//S-Cu/Cu 2 O) hybrid capacitors, they show the energy density of 47.7 and 147.3 Wh·kg −1 at the power density of 636.2 and 800 kW·kg −1 , respectively. Otherwise, the flexible MnO 2 //S-Cu/Cu 2 O hybrid capacitor is assembled, which also exhibits good performance at different bending conditions. This work can provide a simple method to prepare the electrode materials via in situ anion modification for high-energy density battery-like energy storage systems.
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VACUUM
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2024
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IF 3.8
Zonghan Hu,Qi Wang,Zihang Wang,Lanlan Zhang,Chengwei Hu,Yuanhu Lei,Yupei Qiao,Bing Lv
Currently, the two predominant heterojunction types, namely type II and S-scheme heterojunctions, are extensively employed in photoelectrochemical (PEC) water splitting for hydrogen production. However, type II heterojunctions suffer from the drawback of diminished oxidation-reduction capability. In this work, S-scheme CdIn 2 S 4 /CuS (CIS/CuS) heterojunction nanoblocks (NBs) photoanode is constructed for the first time by a hydrothermal and the successive ionic layer adsorption and reaction (SILAR) methods. The heterojunction achieves a photocurrent density of up to 4.0 mA/cm 2 at 0 V vs. Ag/AgCl, 2.37 times that of the pure CIS NBs photoanode. X-ray photoelectron spectroscopy (XPS), Tauc plots, Mott-Schottky (M − S) tests and density functional theory (DFT) calculations reveal the formation of S-scheme band structure between the interface of CIS and CuS. As a result, the significantly enhanced PEC water splitting performance of CIS/CuS NBs photoanode is attributed to the superior light absorption ability of CuS and the effective charge separation achieved by S-scheme band structure between the interface of CIS and CuS. This work also provides new ideas and strategies for designing efficient S-scheme heterostructures for efficient PEC water splitting.
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