JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2025
·Vol. 36
·期 24
·1-20
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IF 2.8
Li Yuzhen,Li Shuo,Xia Yunsheng,Sun Zhaoxin,Lan Borong
Photocatalytic technology had attracted attention for the abatement of organic contaminants in wastewater with solar energy. In this study, a binary supported heterojunction photocatalyst (AgIn(MoO 4 ) 2 /g-C 3 N 4 ) was constructed by a facile impregnation method, and the catalyst was utilized for the efficient degradation of tetracycline (TC) under visible light. The structure, micro-morphology and optical properties of the photocatalyst were also characterized and analyzed. Compared with g-C 3 N 4 and AgIn(MoO 4 ) 2 , the composites exhibited excellent photocatalytic performance. Among them, superoxide radicals, hydroxyl radicals and holes were participated in the degradation reaction. In addition, the composites had good cyclic stability and a broad pH usage range. The enhanced photocatalytic degradation performance could be attributed to the Z-scheme electron transfer mechanism, which both promoted the separation of photogenerated carriers and utilized the strongest redox capacity in the monomer. Overall, this work provided a feasible strategy for constructing g-C 3 N 4 -based heterojunction catalysts for efficient removal of TC from polluted water.
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ChemistrySelect
·
2025
·Vol. 10
·期 30
·e01615
·
IF 2
Bing Wang,Pinliang Lai,Jian Zhang,Guomin Li,Rao Fu,Hui Liu
Graphical The AgPCN+APS photocatalytic system was constructed in situ and its performance in degrading dyes in complex water environments was systematically investigated. It is of vital importance to develop highly efficient photocatalysts capable of removing dyes from actual wastewater environments. In this study, we constructed a in-situ, novel P-doped g-C 3 N 4 /Ag 3 PO 4 Z-scheme heterojunction photocatalyst (AgPCN) to degrade rhodamine B(RhB) in wastewater activated by persulfate (APS). Without the addition of persulfate, the kinetic degradation constant of RhB degraded by AgPCN can reach 0.53619 min −1 . Under the activation with a specific amount of persulfate, the kinetic degradation constant of RhB in the AgPCN + APS photocatalytic system can reach 0.78844 min −1 , which is 1.47 times higher than that of pure AgPCN. This is attributed to the structural defects of AgPCN itself and the energy level transformation caused by doping. Additionally, the activation of APS stimulates the generation of free radicals such as SO 4 · 2− , O 2 · − , and ·OH during the degradation process of AgPCN. It is worth noting that the AgPCN + APS system has a wide pH tolerance, indicating its application potential in complex actual wastewater environments. After three cycles of experiments, it still maintained a degradation efficiency of over 95%. Therefore, the AgPCN + APS system features excellent stability and wide applicability, providing a promising technical approach for the industrial treatment of dye wastewater.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Qing Wang,Xingyue Qian,Hui Xu,Guangyu He,Haiqun Chen
Exploring effective approach to promote more comprehensive charge transfer and efficient spatial charge separation is considered to be a prospective strategy to reinforce photocatalytic degradation activity. Herein, the oxygen vacancy modified Bi 2 WO 6 /NH 2 -MIL-68(In) Z-scheme heterojunction photocatalyst was successfully fabricated via a facile solvothermal method. The chemical structure, morphology, and optical properties of the photocatalyst were characterized in detail. The optimized Bi 2 WO 6 /NH 2 -MIL-68(In) Z-scheme heterojunction displayed the maximum photocatalytic efficiency (84.3 %) for the degradation of levofloxacin (LEV), which was significantly higher than that of pure Bi 2 WO 6 (45.1 %), oxygen vacancy modified Bi 2 WO 6 (69.4 %), and NH 2 -MIL-68(In) (49.3 %). Importantly, the high-resolution mass spectrometry (HRMS), three-dimensional excitation-emission matrix (3D EEMs) fluorescence spectra, the photo-electrochemical and photo-luminescence measurement, radical trapping test, and electron spin resonance (ESR) technique were carried out to illuminate the probable degradation pathway and mechanism of the LEV. The improved photocatalytic efficiency can be ascribed to the synergetic effect between oxygen vacancy and the Z-scheme heterojunction, which can serve as trapping centers to enhance the generation of photoexcited electrons and accelerate the charge transfer. Meanwhile, the effects of pH, photocatalyst dose, LEV concentration and different kinds of harmful organic pollutants were systematically explored from the practical application. This study offers a novel perspective for the integration of defect engineering and Z-scheme heterojunction in efficient organic pollutants degradation.
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CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Lifen Wang,Yonggang Liu,Yinjun Lin,Xueying Zhang,Yonghao Yu,Ruiqin Zhang
Enhancing the effective contact between heterogeneous interfaces and accelerating photo-generated charge separation is the focus of current photocatalysis research. Herein, a novel Z-scheme Cu 2 (OH) 3 F/Bi 2 WO 6 (CFO/BWO) heterojunctions with intimate hetero-surface contact were successfully synthesized via electronic coupling of the surface hydrogen bonds. The optimal proportion of 25%CFO/BWO displayed outstanding photocatalytic performance among the removal of tetracycline hydrochloride (TC-HCl). The excellent catalytic effect comes from the construction of the Z-Scheme heterojunction, which accelerates the separation of photogenerated carriers, and the linking of hydrogen bonds between different planes providing more charge transfer channels. Moreover, explored the main active substances in the reaction process and tested the stability of the as-prepared samples, and the charge transfer law and degradation mechanism in the Z-scheme heterojunction are discussed in detail. This work provides a new way to construct heterojunctions with more adequate hetero-surface contact and faster charge transfer capabilities.
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APPLIED CATALYSIS A-GENERAL
·
2022
·
IF 5.723
Yitong Lin,Taiyu Jin,Yu Liu,Jianhe Tang,Ying Tian,Xueke Liu,Liang Chen,Dawei Fang,Jun Wang
A coated Z-scheme NaGdF 4 :Nd 3+ ,Yb 3+ ,Tm 3+ @CdS-Pd@NiO photocatalyst with core-shell structure is prepared by hydrothermal and coprecipitation methods. NaGdF 4 :Nd 3+ ,Yb 3+ ,Tm 3+ as excellent up-conversion luminescent material can convert infrared light into visible light, broadening the light response range of CdS. Pd nanorods act as conductive channels and co-catalysts, leading to successful construction of titled photocatalyst, increasing contact area between two monomer photocatalysts, promoting transfer of photo-generated electrons. It also provides a large oxidation surface for organic pollutant degradation. The performance of prepared photocatalyst is assessed by Congo red degradation and hydrogen production . The emission spectrum and energy conversion mechanism of NaGdF 4 :Nd 3+ ,Yb 3+ ,Tm 3+ are investigated. The photocatalyst with 3:1 NaGdF 4 :Nd 3+ ,Yb 3+ ,Tm 3+ @CdS-Pd and NiO mass ratio has a preeminent activity. Congo red degradation ratio and hydrogen production amount reach 92.48% and 653.06 µmol/g, respectively, under simulated sunlight irradiation for 180 min. The possible mechanism of organic pollutant degradation with synchronous hydrogen production caused by titled photocatalyst is proposed.
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NEW PHYTOLOGIST
·
2024
·
IF 8.3
Honglian Gu,Jiaxing Li,Dahe Qiao,Mei Li,Yingjie Yao,Hui Xie,Ke-lin Huang,Shengrui Liu,De-Yu Xie,Chaoling Wei,Junyan Zhu
Summary Numerous herbivore-induced plant volatiles (HIPVs) play important roles in plant defense. In tea plants ( Camellia sinensis ), (Z)-3-hexenyl acetate (3-HAC) has been characterized as associated with resistance to herbivores. To date, how tea plants biosynthesize and regulate 3-HAC to resist herbivores remain unclear. Based on transcriptomes assembled from Ectropis obliqua- fed leaves, a cDNA encoding BAHD acyltransferase, namely CsCHAT1 , was highly induced in leaves fed with E. obliqua . Enzymatic assays showed that CsCHAT1 converted (Z)-3-hexenol into 3-HAC. Further suppression of CsCHAT1 expression reduced the accumulation of 3-HAC and lowered the resistance of tea plants to E. obliqua , while 3-HAC replenishment rescued the reduced resistance of CsCHAT1 -silenced tea plants against E. obliqua . Two transcription factors (TFs), CsNAC30 and CsTCP11 , were co-expressed with CsCHAT1 . An integrative approach of biochemistry, DNA–protein interaction, gene silencing, and metabolic profiling revealed that the two TFs positively regulated the expression of CsCHAT1 . The suppression of either one decreased the production of 3-HAC and eliminated the resistance of tea plants to E. obliqua . Notably, the suppression of either one considerably impaired JA-induced 3-HAC biosynthesis in tea plant. The proposed pathway can be targeted for innovative agro-biotechnologies protecting tea plants from damage by E. obliqua .
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CHEMICAL PHYSICS LETTERS
·
2026
·
IF 2.9
Ning Fu,Xiaoqing Yao,Xuechang Ren,Yuxiang Chen,Hongjin Chen
AgCl/UiO-66/g-C 3 N 4 ternary heterojunction was constructed. • ACU-70 achieved 99.4% RhB degradation within 105 min. • ACU-70 showed a rate constant of 0.05011 min −1 . • ·O 2 − and h + were identified as the dominant active species. • The Type-II/Z-scheme pathway promoted charge separation. Constructing heterojunctions is regarded as an effective strategy to facilitate the separation of photogenerated charge carriers. A novel Type-II/ Z -scheme tandem heterojunction AgCl/UiO-66/g-C 3 N 4 composite photocatalyst was successfully prepared in this study. The catalyst achieved a 99.4% degradation rate of RhB within 105 min, with an apparent kinetic constant k value of 0.05011 min −1 . These values are 15, 16, and 7.5 times higher than those of pure g-C 3 N 4 , UiO-66, and AgCl, respectively. ·O₂ − and h + are the main active species in the catalytic system. Combined with UV–visible diffuse reflectance spectroscopy results, the successful construction of the Type-II/ Z -scheme tandem heterojunction was further confirmed. A proposed mechanism for the enhanced photocatalytic activity of the AgCl/UiO-66/g-C 3 N 4 composite under UV–visible light illumination. Download: Download high-res image (112KB) Download: Download full-size image
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NEW JOURNAL OF CHEMISTRY
·
2022
·Vol. 47
·期 4
·1935-1944
·
IF 3.925
Hancheng Tan,Xiaolan Zhou,Haiyan Zhu,Wenxiu Gu
A micro/nano hierarchical flower-like ZnS/FeS2 direct Z-scheme heterojunction visible-light catalyst was in situ derived from a Prussian blue analogue cube (Zn–Fe PBA) using a facile one-pot hydrothermal sulfidation strategy. The as-prepared ZnS/FeS2 catalyst shows extraordinarily boosted visible-light photocatalytic degradability for Rhodamine B (RhB) with the synergism of peroxydisulfate (PDS). Under visible-light illumination, 98.5% degradation efficiency can be achieved within 15 min and 100% within 20 min with excellent structural stability of ZnS/FeS2. The degradation kinetic constant of ZnS/FeS2 + PDS is 9.33 times that of ZnS/FeS2, 23.02 times that of p-ZnS/FeS2, 24.05 times that of FeS2, and 28.25 times that of ZnS, respectively. The ZnS/FeS2 heterojunction shows significant synergistic benefits in the photocatalytic degradation reaction. More advantageously, ZnS/FeS2 + PDS shows excellent photocatalytic degradation performance in a wide pH range (1–10). A reasonable direct Z-scheme heterojunction mechanism for visible-light responsive photocatalytic degradation of RhB with ˙OH, h+, ˙O2−, and ˙SO4− as the crucial active species is recommended for the ZnS/FeS2 + PDS composite system. The micro/nano hierarchical flower-like structure of ZnS/FeS2 simultaneously combines the high activity of nano-materials with the advantages of easy recycling of micro-sized materials. The in situ transformation characteristics of ZnS/FeS2 from the PBA template contribute to the advantageous high performance and structural stability.
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DALTON TRANSACTIONS
·
2022
·Vol. 51
·期 20
·8015-8027
·
IF 4.569
Zongyu Zhang,Xiuling Xue,Xiaoyi Chen
A novel ternary dual Z-scheme 2D g-C3N4 nanosheet/Ag3PO4/α-Bi2O3 (CNN/AP/BO) photocatalyst was successfully synthesized by an in situ deposition and hydrothermal–calcination method. The coupling of AP and BO remarkably enhanced the photocatalytic tetracycline (TC) degradation under visible light illumination, with an optimal removal efficiency of 91.6% (60 min), which can be attributed to the extended visible-light absorption and increased specific surface area owing to the interfacial intimate coupling with well-matched energy band positions between semiconductors. The improved photocatalytic activity resulted from the abundant free radicals by the order of ˙O2− > h+ > ˙OH based on the electron spin resonance (ESR) and quenching experiment results. In addition, the possible mechanism of TC degradation over the ternary dual Z-scheme heterojunction CNN/AP/BO was proposed.
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CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Yirui Zhao,Hongshun Hao,Jiaqi Zhong,Gongliang Zhang,Jingran Bi,Shuang Yan,Feng Hong,Hongman Hou
Foodborne pathogens are the main factors causing food poisoning, and it is of great significance to develop novel nanocomposites to obtain efficient and stable photothermal-assisted photocatalysts for killing foodborne pathogens. In this paper, Z-type heterojunction WO 3 /TpPa-1 with a core-shell structure was constructed by in-situ synthesis, and the Nb 2 CT x was used as a co-catalyst to obtain an efficient ternary composite WO 3 /TpPa-1/N-Nb 2 CT x . Compared to the monomers, the ternary composites improved light trapping, interfacial separation effectiveness, and the mobility of photogenerated carriers. The WO 3 /TpPa-1/15% N-Nb 2 CT x has the best sterilization efficiency of 99.69% under visible-infrared light irradiation for 30 min. The construction of WO 3 /TpPa-1/N-Nb 2 CT x promoted the separation of electron and hole pairs, which improved the electron transport efficiency and the generation of reactive oxygen species. In addition, the excellent photothermal effect of Nb 2 CT x improves the sterilization performance of WO 3 /TpPa-1/N-Nb 2 CT x . The WO 3 /TpPa-1/N-Nb 2 CT x has a broad application prospect in photothermal-assisted photocatalytic sterilization.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Kuan Wang,Run-Jing You,Hui Ma,Tong Sun,Zhen-Hong He,Jian-Gang Chen,Huan Wang,Weitao Wang,Yang Yang,Zhao-Tie Liu
Under the context of energy shortages and global warming, the photocatalytic reduction of carbon dioxide (CO 2 ) to carbon monoxide (CO) using simulated sunlight has attracted considerable research attention. Herein, three-dimensional (3D) Z-scheme cobalt–alumina-layered double hydroxide/bismuth oxybromide (CoAl-layered double hydroxide (LDH)/BiOBr) heterojunction photocatalysts with oxygen vacancies were constructed by intercalating two-dimensional CoAl-LDH between BiOBr layers in the mechanical mixing. The conversion of CO 2 in the water phase was greatly improved compared to CoAl-LDH/BiOBr under 300-W xenon light. The transformation efficiency of 23.62 μmol⋅g −1 ⋅h −1 for CoAl-LDH/BiOBr-10 (CBO-10) is 2.96 and 8.34 times that of pure BiOBr and CoAl-LDH, respectively, with CO selectivity in the obtained products reaching as high as 95 %. Furthermore, CBO-10 catalysts exhibited outstanding stability in terms of structure and catalytic performance. The construction of Z-scheme heterojunctions and oxygen vacancies enlarges the photoresponse range of the BiOBr catalyst while reducing the photoelectron–hole recombination efficiency. The unique 3D structure offers more Z-scheme heterojunction interfaces for the separation and transfer of electrons between CoAl-LDH and BiOBr during photoreaction. This study is expected to guide the development of new high-performance photocatalysts and the selective regulation of reduction products.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Luping Feng,Jianghong Wang,Lixiang Zhang,Jiadong Li,Yifan Zhang,Minghong Xu,Peisong Tang,Hua Wang
Tubular Co 9 S 8 /CdS heterostructures have been successfully synthesized by in-situ growing CdS onto Co 9 S 8 nanotubes through a simultaneous immobilization and in-situ reduction strategy. It turned out that the so-obtained heterostructure with Co 9 S 8 /CdS molar ratio of 1/10 can display a broad light absorption edge and especially much enhanced capacity for photocatalytic reduction of Cr(VI) under visible light . The characterization analysis and experimental results suggested that an interfacial electrostatic field between Co 9 S 8 and CdS elements in the heterostructure could be constructed due to their different Fermi levels , allowing for more quantities of highly reductive electrons to participate in the photocatalytic reaction. Therefore, the so-obtained Co 9 S 8 /CdS (1/10) heterostructures could achieve the photocatalytic reduction efficiency of 100% within 20 min, which was more than two and four times larger than that of pristine CdS and Co 9 S 8 , respectively. Moreover, the possible photocatalytic reaction mechanism for reducing Cr(VI) was investigated and found to follow the direct Z-scheme charge transfer pathway. This novel fabrication route for composite photocatalysts with tubular heterostructures could lead to the widespread implementations for the elimination of various harmful pollutants in the process of environmental governance.
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