APPLIED SURFACE SCIENCE
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2022
·
IF 7.392
Jialong Li,Fanming Meng,Hao Wu,Han Zhang
The construction of Z-scheme heterostructures is one of the most effective strategies to improve photocatalytic efficiency. In this study, Ag + doped ZnIn 2 S 4 /Bi 2 S 3 composite nanosphere materials with different mass fractions of Bi 2 S 3 were successfully synthesized by the solvothermal method. Systematic studies showed that the construction of heterogeneous structures and Ag + doping could extend the optical absorption edge and provide more active sites. More importantly, it was shown by photoelectrochemical and PL spectroscopy tests that Ag: ZnIn 2 S 4 /Bi 2 S 3 has strong visible light absorption and photocarrier transfer capability. In addition, the Z-scheme mechanism of Ag: ZnIn 2 S 4 /Bi 2 S 3 was investigated by electron spin response (ESR) and active substance capture experiments, which confirmed that both superoxide radicals( O − 2 ) and hydroxyl radicals( OH) were involved in the photocatalytic reaction. The results showed that the optimized Ag: ZnIn 2 S 4 /2.5%Bi 2 S 3 degraded TC by 89.7%, 1.87 times higher than the original ZnIn 2 S 4 . This work provides a promising method for the construction of Z-scheme heterojunctions based on ZnIn 2 S 4 .
研究领域:
材料科学
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环境科学
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DOI
高影响因子
Chinese Physics B
·
2022
·Vol. 31
·期 3
·037406
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IF 1.652
Dong Yan,Lingyong Zeng,Yijie Zeng,Yishi Lin,Junjie Yin,Meng Wang,Yihua Wang,Daoxin Yao,Huixia Luo
The relationship between charge-density-wave (CDW) and superconductivity (SC), two vital physical phases in condensed matter physics, has always been the focus of scientists' research over the past decades. Motivated by this research hotspot, we systematically studied the physical properties of the layered telluride chalcogenide superconductors CuIr2−xAlxTe4 (0 ⩽ x ⩽ 0.2). Through the resistance and magnetization measurements, we found that the CDW order was destroyed by a small amount of Al doping. Meanwhile, the superconducting transition temperature (Tc) kept changing with the change of doping amount and rose towards the maximum value of 2.75 K when x = 0.075. The value of normalized specific heat jump (Δ C/γ Tc) for the highest Tc sample CuIr1.925Al0.075Te4 was 1.53, which was larger than the BCS value of 1.43 and showed the bulk superconducting nature. In order to clearly show the relationship between SC and CDW states, we propose a phase diagram of Tc vs. doping content.
研究领域:
凝聚态物理
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材料科学
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超导性
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电荷密度波
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DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2022
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IF 9.136
Xiaohui Zhan,Junyan Liu,Yue Zhao,Yanping Sun,Rui Gao,He Wang,Huixiang Shi
In this study, we designed and synthesized Mn III with tunable spin state in g-C 3 N 4 through one-step calcination of Mn-MOF. The Mn atoms were induced into the six-fold cavity of the g-C 3 N 4 lattice and formed Mn-N 6 coordination. Mn-MOF served as the source of Mn. The collapse of Mn-MOF effectively promoted the stripping of stacked layers in g-C 3 N 4 and increased the atomic loading. The Mn-N coordination induced impurity energy levels which effectively regulated Mnx-CN's bandgap structure and accelerated the migration and separation of carriers. The O 2 − was activated to 1 O 2 by the energy released from the high-spin Mn III transferred ground state. The H 2 production of Mn 10 -CN (13479.19 µmol·g −1 ·h −1 ) is ∼32.2 times that of CN under visible light irradiation and with a remarkable apparent quantum yield (AQY) of 12.23% at 420 nm. The rates of TC degradation and Cr (VI) reduction achieved 0.059 and 0.18 min −1 , respectively. In addition, the practical application conditions and catalytic mechanism of Mnx-CN were explored. This work demonstrates the connection of the spin state of metal with the photocatalytic activity, providing an efficient photocatalytic system that can be used for solar-chemical energy conversion and pollution remediation, and presenting a new approach for modifying the g-C 3 N 4 -based catalysts.
研究领域:
材料科学
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光催化
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环境科学
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能源转换
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DOI
高影响因子
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
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2015
·Vol. 18
·期 4
·3308-3315
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IF 4.493
Ming Yan,Yilin Wu,Fangfang Zhu,Yinqun Hua,Weidong Shi
The construction of efficient photocatalysts for environmental remediation has attracted a great deal of attention in recent years. In this study, a novel Ag3VO4/WO3 heterojunction photocatalyst has been successfully prepared via a hydrothermal process and a facile precipitation reaction. Under visible light irradiation, the hybrid materials could significantly enhance photocatalytic activity for the degradation of tetracycline (TC) in comparison with single Ag3VO4 and WO3. Within 30 min, 71.2% TC could be photodegraded by the optimum sample (10% A/W), which was about 3.1 times and 4.6 times higher than that of the individual Ag3VO4 and WO3, respectively. Based on the active species trapping experiments and ESR, the photocatalytic oxidation mechanism of the Ag3VO4/WO3 composite was also discussed. It can be assumed that the enhancement of the photocatalytic activity was attributed to the heterojunction which could widely accelerate the separation of photogenerated electron–hole pairs. In general, WO3 hybridized with Ag3VO4 will also efficiently address the problem of low photocatalytic activity.
研究领域:
环境科学
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材料科学
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DOI
PubMed
高影响因子
International Journal of Environmental Research and Public Health
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2022
·Vol. 19
·期 22
·14935
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IF 4.614
Xudong Yin,Xiaojie Sun,Dehao Li,Wenyu Xie,Yufeng Mao,Zhenghui Liu,Zhisen Liu
Bi2WO6-based heterojunction photocatalyst for antibiotic degradation has been a research hotspot, but its photocatalytic performance needs to be further improved. Therefore, 2D/2D P-doped g-C3N4/Bi2WO6direct Z-scheme heterojunction photocatalysts with different composition ratios were prepared through three strategies of phosphorus (P) element doping, morphology regulation, and heterojunction, and the efficiency of its degradation of tetracycline hydrochloride (TC-HCl) under visible light was studied. Their structural, optical, and electronic properties were evaluated, and their photocatalytic efficiency for TC-HCl degradation was explored with a detailed assessment of the active species, degradation pathways, and effects of humic acid, different anions and cations, and water sources. The 30% P-doped g-C3N4/Bi2WO6had the best photocatalytic performance for TC-HCl degradation. Its photocatalytic rate was 4.5-, 2.2-, and 1.9-times greater than that of g-C3N4, P-doped g-C3N4, and Bi2WO6, respectively. The improved photocatalytic efficiency was attributed to the synergistic effect of P doping and 2D/2D direct Z-scheme heterojunction construction. The stability and reusability of the 30% P-doped C3N4/Bi2WO6were confirmed by cyclic degradation experiments. Radical scavenging experiments and electron spin resonance spectroscopy showed that the main active species were •O2−and h+. This work provides a new strategy for the preparation of direct Z-scheme heterojunction catalysts with high catalytic performance.Keywords:P-doped g-C3N4;Bi2WO6;2D/2D direct Z-scheme heterojunction;photocatalytic degradation;tetracycline hydrochloride
研究领域:
环境科学
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材料科学
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化学工程
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光催化
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DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2026
·
IF 6.6
Guangyuan Chen,Qina Quan,Chenyang Lin,Shijian Zhou,Yan Kong
Tetracycline (TC), as a persistent and widely detected antibiotic pollutant, poses severe ecotoxicological risks and necessitates rapid and efficient degradation strategies. Here, we demonstrate a photocatalytic self-Fenton process in which H 2 O 2 produced via visible-light-driven oxygen reduction is directly activated by Fe species for the rapid degradation of TC. To enable efficient H 2 O 2 production, a ternary ZnIn 2 S 4 / CdIn 2 S 4 /MnIn 2 S 4 (denoted as ZC 0.3 M 0.05 ) heterojunction photocatalyst was rationally constructed via a one-pot hydrothermal method. Structural analyses reveal that the three sulfides form a tightly coupled, multi-interfacial nanoscale architecture that induces pronounced interfacial strain and charge polarisation. Consequently, ZC 0.3 M 0.05 delivers a high H 2 O 2 production rate of 4907.7 μmol g⁻ 1 h⁻ 1 , outperforming pristine ZnIn 2 S 4 , CdIn 2 S 4 and MnIn 2 S 4 by factors of 15.2, 10.7 and 13.6, respectively. Upon Fe addition, the in situ generated H 2 O 2 enabled rapid self-Fenton degradation of TC, achieving 91.9 % removal within 5 min, while maintaining high activity under simulated environmental conditions. Combined spectroscopic, electrochemical and theoretical analyses reveal that work-function-difference-driven and stepwise electron-transfer pathways (MnIn 2 S 4 → ZnIn 2 S 4 → CdIn 2 S 4 ) across multiple heterointerfaces facilitate efficient charge separation and O 2 -to-*O 2 ⁻ electron injection. This work establishes a materials framework for on-demand H 2 O 2 production and direct self-Fenton pollutant remediation, and offers general design principles for high-performance ternary metal sulfide heterojunctions.
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高影响因子
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
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2024
·Vol. 26
·期 19
·14194-14204
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IF 2.9
Jianhua Zheng,Yiming Gao,Bingbing Wang,Zhenping Guan,Guangming Yin,Heshan Zheng,Yong Li,Xiangyu Cao,Shunji Zheng
Constructing Z-scheme heterojunctions incorporating an exquisite hollow structure is an effective performance regulation strategy for the realization of high quantum efficiency and a strong redox ability over photocatalysts. Herein, we report the delicate design and preparation of a core–shell hollow CdS@CoTiO3 Z-scheme heterojunction with a CdS nanoparticle (NP)-constructed outer shell supported on a CoTiO3 nanorod (NR) inner shell. The in situ growth synthetic method led to a tightly connected interface for the heterojunction between CdS and CoTiO3, which shortened the transport distance of photoinduced charges from the interface to the surface. The promoted charge carrier separation efficiency and the retained strong redox capacity caused by the Z-scheme photoinduced charge-transfer mechanism were mainly responsible for the boosted photocatalytic performance. Additionally, the well-designed core–shell structure afforded a larger interfacial area by the multiple direction contact between CdS and CoTiO3, ensuring sufficient channels for efficient charge transfer, and thus further boosting the photocatalytic activity. As an efficient photocatalyst, the optimized CdS@CoTiO3 nanohybrids displayed excellent 2,4-dichlorophenol (2,4-DCP) and tetracycline (TC) degradation efficiencies of 91.3% and 91.8%, respectively. This study presents a Z-scheme heterojunction based on ecofriendly CoTiO3, which could be valuable for the development of metal perovskite photocatalysts for application in environmental remediation, and also demonstrated the tremendous potential of integrating a Z-scheme heterojunction with the morphology design of photocatalyts.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
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2018
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IF 11.698
Penghui Ding,Jun Di,Xiaoliu Chen,Junze Zhao,Kaizhi Gu,Yi Zhang,Sheng Yin,Gaopeng Liu,Jiexiang Xia,Huaming Li
Light-mediated reactive oxygen species generation with water and oxygen is generally regarded as a mild and efficient way for organic pollutants removal. However, it is highly difficult but desirable to construct a photochemical system with increased reactive oxygen species production. Herein, by using Bi 2 O 2 CO 3 as a prototype, we devise a simple metal chloride-involved etching method to achieve better light absorption and charge carriers separation in a wide-band-gap semiconductor, thus giving rise to improved molecular oxygen activation. The improved photoinduced reactive oxygen species production is further verified by excellent photocatalytic degradation ability of RhB, TC and BPA under visible and ultraviolet light illumination. In addition, the metal chloride-induced strategies—heterojunction formation and cation doping—significantly affect the dynamics and transfer of carriers, which are advantageous to manipulate one-/two-electron pathway for producing reactive oxygen species.
研究领域:
环境科学
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材料科学
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光化学
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催化
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DOI
高影响因子
ACS Catalysis
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2021
·
IF 13.084
Lipeng Wu,Bin Li,Yang Li,Xiaobin Fan,Fengbao Zhang,Guoliang Zhang,Qing Xia,Wenchao Peng
Herein, a series of Co@N–C materials are synthesized using nitrates (LiNO3, NaNO3, and KNO3) as templates to control the preferential growth of the cobalt (200) facet. Co@N–C–X (X = LiNO3, NaNO3, and KNO3) exhibit excellent activities and long-term stabilities for Fenton-like degradation of bisphenol A (BPA) with peroxymonosulfate (PMS) as an oxidant. The texture coefficient (TC) is used to investigate the relationship between the Co facets and their catalytic activities, and a linear relation is built between the TC of Co(200) and the reaction rate constant (k). Co(200) is therefore the most active facet for PMS activation, while nitrates can promote the preferential growth of the Co(200) facet. Moreover, the Co(200) facet is more stable against leaching and can achieve more quick transformation between Co2+/Co3+. Quenching tests, electron paramagnetic resonance spectra, and electrochemical tests show that singlet oxygen (1O2) plays the dominant role for BPA degradation. Density functional theory verifies that Co nanoparticles coated with a graphitic nitrogen-doped carbon layer have the best activity for PMS activation. This work first proposes the strategy of using nitrates to control the preferential growth of Co facets and reveals the relationship between the TC value and k, thus attracting great interest in the environmental field.
研究领域:
环境科学
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催化
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材料科学
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产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
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2025
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IF 11.3
Jiaqing Huang,Xiaoyong Xia,Jiajia Li,Liang Liu,Chunyue Xu,Jinkai Qiu,Cheng Lian,Qingfeng Xu,Jianmei Lu
The extraction of TcO 4 - from nuclear wastewater via adsorption-based methods is recognized as a highly promising strategy but confronted with significant challenges due to the harsh conditions often encountered, such as highly acidic or alkaline environments, elevated ionic strengths, and intense radiation fields. In this work, we have designed and synthesized a triazine-tri-imidazole based cationic covalent organic polymer, CTFT, with covalent triazine frameworks (CTF) as the structural building blocks and tri-imidazole-based (TIB) units as the connecting motifs. This highly conjugated polymer successfully overcomes the aforementioned challenges and exhibits remarkable ReO 4 - (a non-radioactive substitute to TcO 4 - ) uptake capabilities across five critical performance metrics simultaneously: ultrafast adsorption kinetics (equilibrium reached within 0.5 min), exceptional resistance to strong acids and bases (4 M HNO 3 and 4 M NaOH), high selectivity towards ReO 4 - (80.5 %, 5000 × over SO 4 2- ), superior radiation resistance (400 kGy γ-rays), and outstanding recyclability (20 cycles, 95.6 % retention). Additionally, CTFT achieves a high ReO 4 - removal efficiency in simulated Hanford waste (85.3 %, 10 g/L). Experimental and theoretical calculation results demonstrate that strong electrostatic interactions and affinity exist between imidazolium cation and ReO 4 - . This finding provides a potential design strategy for developing polymers with high durability in the field of nuclear environmental remediation.
研究领域:
环境修复
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高分子化学
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核化学
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材料科学
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放射化学
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废物处理
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产品关联
DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
·
IF 5.4
Yutong Yang,Lijie Zhao,Danfeng He,Dongmei Shi,Bing Zhao,Haixia Yu,Wanxia Tang,Jianhua Zheng
Considering the potential effects of physical and chemical properties and morphology on photocatalytic performance, La doped Bi 2 WO 6 nanosheets (La/Bi 2 WO 6 -NS) were synthesized by immersion method using Na 2 WO 4 ·2 H 2 O, Bi(NO 3 ) 3 ·5 H 2 O and La(NO 3 ) 3 as raw materials. The synthesized La/Bi 2 WO 6 -NS was characterized by SEM, TEM, XPS, XRD, UV–vis, PL, I-t and EIS. The enhancement of the photocatalytic activity of La/Bi 2 WO 6 -NS in the degradation of tetracycline (TC) and reduction of chromium (VI) can be attributed to the oxygen vacancy level generated by La doping, which played a crucial role in improving the performance of Bi 2 WO 6 -NS. Moreover, the unique 2D nanosheets feature afforded abundant active sites and endowed an enhanced the visible light response, further improved photocatalytic performance. Additionally, 4 % La/Bi 2 WO 6 -NS exhibited extraordinary the simultaneously photocatalytic degradation of Cr(VI)/TC efficiency with 92.0 % and 90.8 %, which are much higher than that of single Cr(VI) and TC. Combining of the experimental confirmations and the deep DFT calculations, the synergistic photocatalytic mechanism of the synthesized material was investigated systematically.
研究领域:
材料科学
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环境科学
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化学工程
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产品关联
DOI
高影响因子
Journal of the Taiwan Institute of Chemical Engineers
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2026
·
IF 6.9
Weiguang Wang,Xinyu Zhang,Yu Zhang,Yanhong Xu,Dan Zhang,Xiangyu Li
Tetracycline(TC) contamination necessitates effective remediation. Utilizing agricultural waste like corn straw pith offers a sustainable route to develop high-efficiency adsorbents for removing antibiotics from aquatic systems. A novel dual-modification strategy was developed using agricultural waste corn straw pith as the precursor. This approach combined K 2 HPO 4 -assisted hydrothermal pretreatment with KHCO 3 solid-state activation to synthesize a high-performance biochar adsorbent designated as KPBC-800. The resulting material was characterized to analyze its pore structure and surface chemistry. Additionally, adsorption experiments were conducted to evaluate its capacity for tetracycline removal, kinetic behavior, isotherm models, pH adaptability, and resistance to ionic interference. The synthesized KPBC-800 exhibited an ultra-high specific surface area of 1991.40 m 2 /g and a layered micro-mesoporous network, alongside directionally enriched oxygen-containing functional groups. It demonstrated a maximal tetracycline adsorption capacity of 722.02 mg/g, with the process following the pseudo-second-order kinetic and Langmuir isotherm models. The adsorbent showed broad pH adaptability and excellent resistance to ionic interference. Mechanistic studies revealed that superior performance resulted from the synergy of hydrogen bonding, π-π electron donor-acceptor interactions, and effective pore filling. This work demonstrates a feasible dual‑activation strategy for upgrading agricultural waste into a high‑performance biochar adsorbent, providing insights that may inform the design of efficient antibiotic removal materials.
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高影响因子
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