JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
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2024
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IF 4.1
Xupeng Chen,Jun Yu,Yong Jin,Yunzhao Zhang,Jie He,Xingang Li,Chun Zhang
In this paper, C/ZnO/ZnFe 2 O 4 @ZnIn 2 S 4 ternary heterojunctions were prepared using Zn-Fe bimetal-organic frameworks (Zn-Fe MOFs) as precursors and applied to the photocatalytic degradation of tetracycline hydrochloride (TC). The experimental results show that 30 mg of the composite (FS-2) showed 96 % removal of 20 mg/L TC. The improved photocatalytic performance was attributed to the synergistic effect of the double S-scheme heterojunction and the carbon layer, which greatly facilitated the separation of electron-hole pairs by the reverse motion of electrons and holes driven by the difference of work functions and the built-in electric field at the interface. The carbon layer acts as an electronic bridge can further improve the charge transfer between the interfaces of different photocatalysts, allowing more useful electrons and holes with strong redox capabilities to participate in the surface reactions. Combining the experimental results and density functional theory (DFT) calculations, the photocatalytic mechanism of the dual S-scheme system is proposed. This study provides a theoretical basis for the design of novel photocatalytic materials with dual S-scheme heterojunctions and efficient photocatalytic degradation.
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高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Xiang Li,Lu Wang,Ruiying Li,Ming Ke,Ying Zhou,Jian Liu
Developing efficient and economical electrocatalysts for hydrogen evolution reaction (HER) over a broad pH range has received considerable attention. In this work, we prepared multi-dimensional MoS 2 /S-CoP heterojunction catalysts by utilizing the carbon clothes supported ZIF-67 array as templates combining with Mo-ion exchange and high-temperature phosphorization-sulfidation strategy. The introduction of MoS 2 into S-CoP results in electron redistribution and the formation of a distinctive space charge region at the two-phase contact interface, thereby effectively tuning surface properties, enhancing electron conductivity, and improving electrocatalytic activity. According to Density Functional Theory (DFT) calculations, the introduction of MoS 2 is advantageous for the adsorption and desorption of H*, resulting in the value of ΔG H* very close to zero. Furthermore, the adsorbed water molecules are more readily activated, rendering the ΔG H2O-dis decrease, thus significantly promoting HER activity. These features contribute to robust HER electrocatalytic performance in a wide pH range and even in seawater, which is also beneficial for industrial applications. In particular, MoS 2 /S-CoP exhibits superior HER performance in alkaline seawater, requiring only 197 and 228 mV to reach the current densities of 100 and 200 mA cm -2 , respectively. This study offers novel perspectives on high-performance heterostructures for HER electrocatalysts in alkaline seawater environments.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2024
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IF 8.1
Hongquan Fu,Jinhua Wang,Juan Zhang,Dan Liu,Hejun Gao,Yunwen Liao,Hao Yu
Though the different exposed crystal facets of cadmium sulfide (CdS) catalysts have been demonstrated to enhance their photocatalytic activity , the mechanism behind H 2 evolution on these diverse facets remains elusive. Here, we synthesized CdS photocatalysts with co-exposed (101) and (002) crystal facets, incorporating S vacancies via a hydrothermal method within the temperature range from 80 to 240 °C. The resulting CdS nanorods exhibited exposed (002) and (101) crystal facets, demonstrating abundant S vacancies, and showcased a notable photocatalytic hydrogen (H 2 ) evolution activity of 467.67 μmol g −1 ·h −1 —approximately 144 times higher than that of CdS nanoparticles . Both experimental results and density functional theory (DFT) calculations showed the significance of co-exposed (101) and (002) crystal facets as self-constructed crystal homojunctions on CdS, facilitating efficient spatial separation of photogenerated charges. Additionally, co-exposed (101) and (002) crystal facets with S vacancies, stemming from the mismatched lattice, were observed to enhance the adsorption of water (H 2 O) molecules. This, in turn, reduced the energy required for H 2 dissociative adsorption , providing thermodynamic advantages. The understanding of the synergistic effect between self-constructed (101) and (002) facet junctions and S vacancies on CdS for boosting photocatalytic H 2 evolution holds promise for expanding the applications of CdS-based materials in various photocatalytic processes.
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APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Liruhua Zhang,Zhixiang Chen,Yi Lu,Qingxia Liu,Lingbing Kong
The synergy between surface oxygen vacancies (OVs) and heterojunction engineering holds promising potential for substantially enhancing photoelectric conversion efficiency through the optimization of photogenerated charge carrier transport. Herein, novel WO 3 -OVs@Bi 2 MoO 6 S-scheme heterostructures are synthesized via a simple route for degradation of tetracycline hydrochloride (TC) using visible light. The S-scheme charge transfer mode markedly enhances the spatial separation and preservation of high-energy electrons/holes on Bi 2 MoO 6 (reduction) and WO 3 -OVs (oxidation), consequently providing WO 3 -OVs@Bi 2 MoO 6 photocatalysts with an improved redox capability. The optimal WO 3 -OVs@Bi 2 MoO 6 heterojunction demonstrates enhanced visible-light-driven photocatalytic degradation of tetracycline, exhibiting 4.86-fold and 4.17-fold higher efficiency compared to WO 3 -OVs and Bi 2 MoO 6 , respectively, with superior stability and reusability. Confirmation of the existence of the S-scheme charge transfer mechanism and oxygen vacancies (OVs) is achieved through a combination of density functional theory (DFT) calculations and in-situ X-ray photoelectron spectroscopy (XPS), substantiating the enhancement of charge separation and redox capability. Specifically, the presence of oxygen vacancies (OVs) on the surface of WO 3 nanofibers results in a reduction of the band gap energy due to the defect levels, consequently promoting increased electron conduction. Furthermore, the abundance of oxygen vacancies (OVs) expands the photo response range and facilitates charge transfer at the interface. This research opens new avenues for the successful photocatalytic degradation of tetracycline (TC) by integrating hierarchical S-scheme heterojunction design and cutting-edge defect engineering in photocatalytic heterojunctions.
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Nano Research
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2018
·Vol. 11
·期 3
·1379-1388
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IF 7.994
Liu Xiao-Yuan,Zhang Guozhen,Chen Hao,Li Haowen,Jiang Jun,Long Yi-Tao,Ning Zhijun
The development of photocatalysts that can effectively harvest visible light is essential for advances in high-efficiency solar-driven hydrogen generation. Herein, we synthesized water soluble CuInS 2 (CIS) and Cu-In-Zn-S (CIZS) quantum dots (QDs) by using one-pot aqueous method. The CIZS QDs are well passivated by glutathione ligands and are highly stable in aqueous conditions. We subsequently applied these QDs as a light harvesting material for photocatalytic hydrogen generation. Unlike most small band gap materials that show extremely low efficiency, these new QDs display remarkable energy conversion efficiency in the visible and near-infrared regions. The external quantum efficiency at 650 nm is ∼1.5%, which, to the best of our knowledge, is the highest value achieved until now in the near-infrared region.
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POLYMER
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2017
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IF 3.684
Xiaodong Cai,Xiangui Yang,Hua Zhang,Gongying Wang
Aliphatic-aromatic poly(carbonate- co -ester) random copolymers poly(butylene carbonate- co -furandicarboxylate)s (PBCFs) with different composition had been prepared from dimethyl carbonate (DMC), 1,4-butanediol (BD) and bio-based dimethyl furan-2,5-dicarboxylate (DMFA) by two-step melt polycondensation method. A series of characterization results can be explained as follows: the varying melting temperature ( T m ) and enthalpy ( ΔH m ) displayed that the copolymers were strongly dependent upon the compositions of butylene carbonate (BC) and butylene furandicarboxylate (BF) units. In addition, glass transition temperature ( T g ) noticeably increased with the content of BF units increasing, which agreed with Fox equation; a comparative kinetics research of isothermal crystallization of homopolymer and copolymers with different composition displayed that the existence of BF units could accelerate the crystallization rate of PBC. Furthermore, all of PBCFs exhibited a typical isodimorphic cocrystallization behavior, whose crystal lattice structure shifted from PBC type crystal to PBF type; the thermal stability of PBCFs also expressed to be enhanced during the process of the increasing BF unit content; last but not the least, the mechanical performances could be easily by adjusting the feed components.
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高影响因子
Journal of the Taiwan Institute of Chemical Engineers
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2017
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IF 4.217
Meng Li,Zipeng Xing,Jiaojiao Jiang,Zhenzi Li,Junwei Yin,Junyan Kuang,Siyu Tan,Qi Zhu,Wei Zhou
A novel plasmonic Ag decorated S-TiO 2− x nanorods are successfully fabricated under 700 °C calcination, then followed by an in-situ solid-state chemical reduction approach with NaBH 4 in a mild calcination (350 °C) and combined with photo-deposition approach. The resultant Ag/S-TiO 2− x sample with high crystallinity and narrow band gap of ∼2.39 eV, extends the photoresponse to near-infrared region. The visible-light-driven photocatalytic degradation rate of phenol and hydrogen production rate for Ag/S-TiO 2− x nanorods are as high as 98.67% and 209.2 µmol h −1 g −1 , which is about 2 and 5 times higher than that of S-TiO 2 . Especially, first-order reaction rate constant of Ag/S-TiO 2− x nanorods is 14 times higher than that of S-TiO 2 . The excellent photocatalytic property can be attributed to the synergistic effect of Ti 3+ self-doping, S doping and the enhanced surface plasmon resonance of Ag nanoparticles, which narrows the band gap, favors the visible light utilization, and promotes the separation of photogenerated charge carriers.
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International Journal of Peptide Research and Therapeutics
·
2024
·Vol. 30
·期 5
·1-13
·
IF 2
Liu Ziyang,Wei Yuping,Zhang Man,Zhu Xingyan,Liu Kun
Angiotensin-converting enzyme-2 (ACE2) is a important cell surface receptor of SARS-CoV-2 S protein. The initial stage of SARS-COV-2 cell infection involves the binding of the S protein to ACE2. Hence, this work presents an innovative strategy to designing ACE2-based peptide inhibitors by considering the surface property and morphology of the S protein RBD. The aim is to develop a short peptide inhibitor that can effectively inhibit S protein-ACE2 interaction Through computational analysis and molecular simulation, the surface properties and morphology of S protein receptor-binding structural domain (RBD) were investigated, while the key residues of ACE2 ligand-binding structural domain (LBD) were identified based on their contributions and non-covalent interactions. Then, peptide inhibitors, consisting of ACE2 key residues, were developed by fitting to the surface characteristics and topographical features of the S protein RBD. Molecular simulation showed that two novel short peptides, IEPFF (I5) and WIEPFF (W6) had high affinity for S protein RBD but a low affinity for the cell membrane. Cellular adsorption studies demonstrated that both I5 and W6 effectively blocked ACE2-S protein binding without significant cytotoxicity. Flow cytometry analysis revealed that both I5 and W6 effectively inhibited S protein binding to the ACE2, resulting in a significant reduction (75 and 79%, respectively) in fluorescence intensity after 30 min of incubation at a concentration of 200 μM. Both I5 and W6 were excellent potential anti SARS-COV-2 drugs. This work provides an innovative perspective for the development of functional peptides for the prevention and management of SARS-COV-2.
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Journal of Materials Chemistry C
·
2024
·
IF 5.7
Sheng Ding,Wei Gan,Jun Guo,Ruixin Chen,Run Liu,Ziwei Zhao,Jianrou Li,Zhaoqi Sun,Miao Zhang
In this study, the S-scheme heterostructure photocatalyst of SnS2/TiO2 (denoted as ST) ultrathin nanosheet-nanorod arrays with high efficiency for the degradation of tetracycline hydrochloride (TC-HCl) was successfully prepared by a two-step hydrothermal method. By expanding the light absorption area and hindering the reorganization of light-generated e--h+ pairs, the binding of TiO2 to SnS2 prepared photocatalysts with highly efficient photocatalytic activity and long-term stability. The results showed that the optimized photocatalyst samples all contributed to the degradation efficiency of tetracycline hydrochloride within 90 min than the photocatalytic degradation of pure TiO2 (41.1%). Among them, the ST loaded with 30 mM SnS2 exhibited the highest photocatalytic degradation efficiency of TC-HCl (93.4%). The reaction rate constant K is 0.02597 min-1, and the transient photocurrent density of ST-30 was up to 34.35 A/cm2, which were 5.78 and 10.54 times higher than that of unmodified TiO2. At the same time, the effects of photocatalysts on the degradation efficiency of TC-HCl under different conditions (pH values, inorganic anions and antibiotic concentrations) were systematically investigated. The inhibition of the degradation efficiency of tetracycline hydrochloride by SnS2/TiO2 heterojunction with the addition of different free radical scavengers indicated that ·O2- and ·OH were the main active substances involved in the degradation process. In addition, two environmentally friendly degradation pathways were proposed based on the analysis of liquid chromatography-mass spectrometry (LC-MS) results and the toxicity assessment of various intermediates in the degradation process. Finally, the photocatalytic mechanism of SnS2/TiO2 heterojunctions was proposed based on the optical and electrochemical properties of the photocatalysts as shown in the tests. These results indicate that the synthesized S-scheme heterostructure photocatalyst SnS2/TiO2 can significantly improve the light trapping ability and reduce the photoelectron-hole complexation rate, which is a promising approach to enhance the degradation efficiency of photocatalysts.
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APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Huarui Han,Songbai Zhang,Shushan Song,Weijie Zhang,Dandan Liu,Ziheng Song,Qianyu Wang,Changchang Ma,Sheng Feng,Xuemei Duan
In this study, a new type of 2D/2D Bi 2 O 3−x /NiAl-LDH (BO/NA-LDH) S-scheme photocatalyst was prepared by combining NiAl-LDH with Bi 2 O 3−x by wet chemical deposition for obtaining efficient photothermal-assisted photocatalytic reduction of CO 2 under simulated sunlight irradiation. In particular, the as-prepared optimal 50-BO/NA-LDH sample exhibited the CO production yield of 83.55 ± 2.76 μmol/g/h, which was 9 and 27 times that of BO (9.32 ± 0.62 μmol/g/h) and NA-LDH (3.09 ± 0.38 μmol/g/h), respectively. The enhancement of photothermal-assisted activity over the 50-BO/NA-LDH system was mainly attributed to the coupling of the photothermal conversion performance of Bi 2 O 3−x and improving the migration efficiency of interface carriers of S-scheme heterojunction and 2D/2D structure. This study presents a promising strategy for the development of high-efficient photothermal-assisted photocatalysts.
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RSC Advances
·
2025
·Vol. 15
·期 11
·8541-8552
·
IF 4.6
Hui Zhang,Yi Hui Sun,Sheng Li An,Rui Hua Guo,Rui Fen Wang,Yu Wei Ma
S-type heterojunction photocatalysts (CeCux-BTC/CN) of cerium-copper bimetallic organic framework (CeCux-BTC) and graphitic carbon nitride (g-C3N4) were constructed by a simple solvothermal method using cerium nitrate, copper nitrate, and urea as the raw materials, and 1,3,5-benzene-tricarboxylic acid as the ligand for the photocatalytic CO2 reduction to CO and CH4. The results show that the built-in electric field constructed by Fermi energy level flattening transfers the electrons in an S-type manner, which not only preserves the strong reducing properties of the electrons in the material but also provides the maximum redox capacity and enables the composite samples to obtain higher visible-light trapping capacity and improve the separation efficiency of the carriers while refining the crystal particles. With the addition of only 1 mL of H2O as the proton supply source, CeCu0.05-BTC/CN exhibits the optimal photocatalytic performance. The CO and CH4 yields were 64.44 and 0.5575 μmol g−1, which were 7.56 and 2.42 times higher than those of g-C3N4, respectively, and the catalytic performances were basically stable after cycling tests.
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PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2024
·
IF 4.9
Feihu Mu,Jin Huang,Shengpan Xu,Ruiqing Wang,Xiaozhong Chu,Zhipeng Cheng,Xujing Guo,Wei Zhao,Benlin Dai,Wenshuai Zhu
Dissolved organic matter (DOM) in black-odorous water can cause excessive growth of plants and algae, leading to deterioration of water quality. Herein, an S-scheme Au/g-C 3 N 4 /BiVO 4 heterojunction was constructed using a three-step method for DOM degradation in real black-odorous water in the presence of peroxymonosulfate (PMS). 4Au/g-C 3 N 4 /BiVO 4 /PMS exhibited highly efficient photocatalytic performance, and the DOM removal rate could reach 92.9 %, which was 19.1 and 9.9 times higher than that of g-C 3 N 4 /PMS and BiVO 4 /PMS, respectively. The changes of fluorescence components in DOM were detected using synchronous fluorescence spectra and two-dimensional correlated spectroscopy analysis, and the toxicity of catalytically treated black-odorous water was evaluated by growth inhibition of Escherichia coli . A reasonable S-scheme mechanism was suggested by theoretical calculations and photoelectrochemical tests. The S-scheme mechanism and the synergistic effect of photocatalysis and hybrid advanced oxidation process (HAOP) increased the catalytic activity of Au/g-C 3 N 4 /BiVO 4 /PMS.
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