NEW JOURNAL OF CHEMISTRY
·
2022
·Vol. 46
·期 25
·12217-12228
·
IF 3.925
Xiaoying Yuan,Yue Leng,Changlong Fang,Kangqi Gao,Chenyu Liu,Jianjun Song,Yingshu Guo
Tetracycline hydrochloride (TC) is a typical refractory organic pollutant, and is frequently detected in different water environments, which will increase microbial drug resistance, destroy ecosystems and threaten human health. It is urgent to develop a simple and effective catalyst for TC removal. In this paper, a facile two-step calcination method was used to prepare a LaCoO3/g-C3N4 composite catalyst with high activity and high stability for PMS activation to degrade TC. Various characterization results confirmed that the LaCoO3/g-C3N4 composite catalyst possessed smaller particle size, higher stability and faster electronic transmission ability. Benefiting from the synergistic effect between LaCoO3 and g-C3N4, the LaCoO3/g-C3N4 catalyst showed high activity for PMS activation to degrade different antibiotics. Furthermore, the results of the quenching experiments and the electron paramagnetic resonance (EPR) tests showed that the generated SO4˙− and 1O2 radicals during the PMS activation process played a key role in pollutant degradation. The effect of different reaction conditions (including pH, temperature, PMS concentration, catalyst dosage and different anions) on the performance of the catalyst was also investigated. The catalyst cycle evaluation experiments showed that the LaCoO3/g-C3N4 composite catalyst has high stability and reusability. The phytotoxicity evaluation based on seed germination experiments indicated that the LaCoO3/g-C3N4 composite catalyst system can effectively reduce the toxicity of antibiotics.
研究领域:
环境科学
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材料科学
·
生物学
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DOI
高影响因子
Desalination and Water Treatment
·
2024
·
IF 1
Hui Huang,Bin Huang,Yichun Huang,Jinbei Yang,Yinnv Ye,Yucheng Chen
Attractive environmentally friendly magnetic metal-organic framework (MOF) nanocomposite GO@Fe 3 O 4 -COOH@NH 2 -MIL-101(Fe) was synthesized by a solvothermal method and characterized by X-ray diffraction, Fourier transform infrared, scanning electron microscopy, Brunauer– Emmett–Teller, and vibrating sample magnetometer, and used as an effective adsorbent for the removal of orange G from aqueous solution. The various operating parameters that effect the adsorption process, such as adsorbent dosage (0.01–0.2 g), pH (1.0–10.0), initial concentration (50–400 mg L –1 ), and temperature (298.15–318.15 K) were studied. The percent removal of orange G increases with the increment of the adsorbent dosage and decrease of the initial concentration, and the optimum pH is 6.0. The Redlich–Peterson model can be favorably applied to describe the adsorption equilibrium data, indicating that the surfaces of GO@Fe 3 O 4 -COOH@NH 2 -MIL-101(Fe) nanocomposite for the orange G adsorption are made up of homogeneous adsorption patches. The adsorption kinetics indicate that the adsorption process of GO@Fe 3 O 4 -COOH@NH 2 -MIL-101(Fe) toward orange G obeys the pseudo-second-order model and the activation energy is 16.5 kJ mol –1 . Thermodynamic parameters, ΔH = 39.81 kJ mol –1 , ΔS = –46.80 J mol –1 K –1 , and ΔG < 0, exhibit that the adsorption is exothermic and spontaneous. The maximum adsorption capacity of orange G onto GO@Fe 3 O 4 -COOH@NH 2 -MIL-101(Fe) nanocomposite is 128.8 mg g –1 . Therefore, magnetic GO@ Fe 3 O 4 -COOH@NH 2 -MIL-101(Fe) nanocomposite can be employed as an environmentally friendly and efficient adsorbent for the orange G removal from wastewater.
研究领域:
环境科学
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纳米技术
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材料科学
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化学工程
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水处理
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DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2025
·
IF 7.9
Changqing Liu,Yufei Chen,Tao Wang,Ying Wang,Conghui Liu,Xingang Kong,Jianfeng Huang,Ling Guo,Lixiong Yin
To tackle the pressing dual challenges of the energy crisis and environmental pollution , it is urgent to develop low-cost, high-activity photocatalysts for solar-driven hydrogen production. In this work, a Zn x Cd 1-x S/protonated g-C 3 N 4 S-scheme heterojunction photocatalyst is successfully constructed using an electrostatic interaction-driven assembly strategy. The optimized composite photocatalyst exhibits a hydrogen evolution rate of 17.64 mmol g −1 h −1 , which is approximately 4.14 times and 28.45 times higher than that of pure Zn x Cd 1-x S and protonated g-C 3 N 4 . The apparent quantum efficiency (AQE) of ZCSCN-20 reaches 12.3 % at 420 nm. The electrostatic interaction drives the assembly of the heterojunction, leading to an intimate interfacial contact. This close connection, in turn, significantly shortens the migration distance and transfer time of photogenerated charges. The established S-scheme charge transfer pathway enables the efficient separation of photogenerated charge carriers while preserving the strong redox capability inherent in the constituent semiconductors. Furthermore, the use of sacrificial agents to deplete photogenerated holes further suppresses charge carrier recombination, synergistically enhancing the overall catalytic activity. This work provides an efficient strategy for preparing and optimizing sulfide-based S-scheme heterojunction photocatalysts, laying a foundation for developing stable, high-performance solar-driven hydrogen production systems.
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产品关联
DOI
高影响因子
RSC Advances
·
2020
·Vol. 10
·期 33
·19169-19177
·
IF 3.119
Biao Zhou,Bo Yang,Muhammad Waqas,Ke Xiao,Caizhen Zhu,Ling Wu
Constructing a 0D/3D p–n heterojunction is a feasible strategy for accelerating photo-induced charge separation and promoting photocatalytic H2 production. In this study, a 0D/3D MoS2/g-C3N4 (0D/3D-MCN) photocatalyst with a p–n heterojunction was prepared via a facile light-assisted deposition procedure, and the 3D spongy-like g-C3N4 (3D-CN) was synthesized through simple thermolysis of NH4Cl and melamine mixture. For comparison, 2D-MoS2 nanosheets were also embedded in 3D-CN by a solution impregnation method to synthesize a 2D/3D-MCN photocatalyst. As a result, the as-prepared 0D/3D-MCN-3.5% composite containing 3.5 wt% 0D-MoS2 QDs exhibited the highest photocatalytic H2 evolution rate of 817.1 μmol h−1 g−1, which was 1.9 and 19.4 times higher than that of 2D/3D-MCN-5% (containing 5 wt% 2D-MoS2 nanosheets) and 3D-CN, respectively. The results of XPS and electrochemical tests confirmed that a p–n heterojunction was formed in the 0D/3D-MCN-3.5% composite, which could accelerate the electron and hole movement in the opposite direction and retard their recombination; however, it was not found in 2D/3D-MCN-5%. This study revealed the relationship among the morphologies of MoS2 using g-C3N4 as a substrate, the formation of a p–n heterojunction, and the H2 evolution activity; and provided further insights into fabricating a 3D g-C3N4-based photocatalyst with a p–n heterojunction for photocatalytic H2 evolution.
研究领域:
材料科学
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能源化学
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DOI
PubMed
高影响因子
OPTICAL MATERIALS
·
2021
·
IF 3.08
Jianhe Tang,Yu Liu,Yitong Lin,Xueke Liu,Liang Chen,Congcong Piao,Dawei Fang,Jun Wang
Photocatalysis technology is an effective way for converting nitrate (NO 3 − ) and sulfite (SO 3 2− ) in wastewater to pollution-free nitrogen (N 2 ) and exploitable ammonium sulfate ((NH 4 ) 2 SO 4 ). In this study, three novel photocatalysts , Z-scheme (Cu,Cu)/g–C 3 N 4 –(Cu,Cu)-WO 3 (002), Z-scheme (Cu,Ag)/g–C 3 N 4 –(Cu,Ag)-WO 3 (002) and Z-scheme (Cu,Ru)/g–C 3 N 4 –(Cu,Ru)-WO 3 (002), were prepared by photo-assisted electrostatic self-assembly method. The prepared photocatalysts are synthetically characterized by XRD , SEM, TEM, EDX , XPS , DRS, PL , TPR and EIS . The effects of different co-catalyst combinations on the activity and selectivity of the photocatalysts are evaluated. Also, the impacts of simulated solar light irradiation time, NO 3 − initial concentration and cycle times on the conversions of NO 3 − and SO 3 2− are studied. The results display that the Z-scheme (Cu,Ag)/g–C 3 N 4 –(Cu,Ag)-WO 3 (002) photocatalyst can selectively convert NO 3 − to N 2 , while the Z-scheme (Cu,Ru)/g–C 3 N 4 –(Cu,Ru)-WO 3 (002) photocatalyst can selectively convert NO 3 − to NH 4 + . Nevertheless, the Z-scheme (Cu,Cu)/g–C 3 N 4 –(Cu,Cu)-WO 3 (002) photocatalyst has hardly selectivity for conversion of NO 3 − . These three photocatalysts all exhibit relatively strong capabilities for converting SO 3 2− to sulfate (SO 4 2− ) due to the existence of the highly active (002) plane of WO 3 . Finally, the possible mechanisms on the photocatalytic conversions of NO 3 − and SO 3 2− caused by Z-scheme (Cu,M)/g–C 3 N 4 –(Cu,M)-WO 3 (002) (M = Cu, Ag and Ru) photocatalysts are proposed.
研究领域:
环境科学
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材料科学
✓ 已验证
DOI
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2024
·Vol. 31
·期 6
·8781-8797
·
IF 0
Al-Nayili Abbas,Alhaidry Wissam A.
Herein, novel surface structure LaFeO 3 /nitrogen-deficient g-C 3 N 4 nanocomposites (LaFeO 3 /g-C 3 N 4 -H) have been successfully synthesized by a two-step process. First, nitrogen-deficient graphitic carbon nitride (g-C 3 N 4 -H) was produced by thermally condensing melamine that had been treated with acetic acid as a precursor. After that, LaFeO 3 was incorporated into the g-C 3 N 4 -H nanosheets. The as-prepared nanostructured materials were characterized by XRD, FT-IR, N 2 adsorption–desorption experiments, FESEM, and TEM, demonstrating the formation of interfacial interaction and heterogeneous structure in LaFeO 3 /g-C 3 N 4 -H nanocomposites. Additionally, UV–vis diffuse reflectance spectra (DRS) and photoluminescence spectra (PL) have been used to assess the optical properties of the nanohybrids. The results show that the LaFeO 3 /g-C 3 N 4 -H nanocomposite was successfully produced with a reliable interfacial interface, and produced a good heterojunction relationship between g-C 3 N 4 -H and LaFeO 3 which may significantly boost the photocatalytic activity as compared to prinstine g-C 3 N 4 and LaFeO 3 . Phenol degradation under visible light irradiation was used to test the photocatalytic activity of LaFeO 3 /g-C 3 N 4 -H, and the results showed that 10%-LaFeO 3 /g-C 3 N 4 -H had significant photocatalytic activity and remarkable adsorption efficiency, with an overall removal rate of phenol up to 88% after 180 min of visible light irradiation. This study may present a novel method for developing highly efficient artificial photocatalytic systems.
研究领域:
材料科学
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环境科学
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纳米技术
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催化
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物理化学
✓ 已验证
DOI
ACS Sensors
·
2020
·
IF 7.333
Wei Chen,Lijun Yang,Chao Yan,Bangben Yao,Jianfeng Lu,Jianguo Xu,Guodong Liu
Overuse and abuse of morphine (MOP), one of the main components of pericarpium papaveris, have attracted increasing attention in the medical field owing to its pharmacological and toxicological activity. Herein, we proposed a new electrochemical nano-biosensor for MOP detection based on surface-confined building of Au@Pt-centered and multi-G-quadruplex/hemin wire-surrounded electroactive super-nanostructures. The center Au@Pt was flower-shaped and irregularly protruded, allowing substantial loading of multiple G-quadruplex wire/hemin complexes on its surface to accomplish the assembly of electroactive super-nanostructures. Interestingly, as the super-nanostructures were closely confined on the electrode surface, a significantly amplified electrochemical signal was thus obtained in the absence of MOP. In contrast, the introduction of target MOP can induce an intense competitive effect and strongly destroy the assembly process, resulting in the reduction of the electrochemical response that is correlated with the logarithmic concentration of MOP. Under optimal conditions, the electrochemical nano-biosensor is capable of highly sensitive detection of MOP in a dynamic concentration range from 1 ppt to 500 ppb. The limit of detection is achieved as low as 0.69 ppt, and the practical application was confirmed by examining MOP from chafing dish condiments. We expect the electrochemical platform utilizing this unique nanoarchitecture to provide rational guidelines to design high-performance analytical tools.
研究领域:
分析化学
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医学检测
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纳米技术
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DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2019
·
IF 2.931
Rong-Mei Kong,Lin Ma,Xue Han,Chunran Ma,Fengli Qu,Lian Xia
G-triplexes have been reported recently with the similar function to G-quadruplex that can combine with thioflavin T (ThT) and emit strong fluorescence but easier to be controlled and excited. In this work, we report an Hg 2+ -mediated stabilization of G-triplex based functional molecular beacon (G3TMB) sensing system for the label-free detection of Hg 2+ , reduced glutathione (GSH), and glutathione reductase (GR) activity. In the presence of Hg 2+ , the extended G-triplex sequence containing the “T” bases can form a stable hairpin structure due to the strong interactions of “T-Hg 2+ -T”, resulting in the locking of G-tracts in the stem of the G3TMB effectively. However, the hairpin structure of the G3TMB can be opened by the introduction of GSH through the stronger “GSH-Hg 2+ ” interaction. Therefore, by employing the fact that GR can catalyze the reduction of oxidized glutathione (GSSG) into GSH, this concept can be applied to fluorescence “off-on” detection of GR activity, with a linear range of 0.02–30 mU/mL and detection limit of 0.01 mU/mL. This work may expand a new perspective of G-triplex based functional molecular beacon as the label-free fluorescent probes in the detection of small biomolecule and enzyme activity .
研究领域:
生物化学
·
分子生物学
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DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2021
·
IF 6.707
Jianchang Gan,Huihu Wang,Haiping Hu,Ming Su,Feng Chen,Huang Xu
By rationally adjusting the band position of CuInZnS in CuInZnS/g-C 3 N 4 hybrids, we reveal the effects of fine turning the band matching on CO 2 reduction and methyl orange near-infrared degradation. The novel design strategy of CuInZnS/g-C 3 N 4 hybrids, including orderly energy band regulation of CuInZnS and surface carboxylation of g-C 3 N 4 , effectively enhances the light absorption capacity and separation efficiency of photogenerated carriers. In addition, L-cysteine was used as sulfur source for in situ synthesis of hybrids. Using the abundant functional groups of L-cysteine molecules to form bonds and interactions with carboxylated g-C 3 N 4 can effectively improve the dispersion and interface binding of CuInZnS/g-C 3 N 4 hybrids, thus enhancing the transport of carriers at the interface. Benefitting from band matching and interface binding characteristics, the optimized CuInZnS/g-C 3 N 4 hybrids manifest remarkable performance for CO 2 reduction with high CO production rate of 50.04 μmol/g in 8 h and excellent activity for methyl orange near-infrared degradation with 96.5% efficiency in 5 h.
研究领域:
材料科学
·
环境科学
·
化学工程
✓ 已验证
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2021
·
IF 4.539
Xiang Xie,Wenhua Xue,Xiaoyun Hu,Hongfei Lv,Jun Fan,Bo Chen,Enzhou Liu
The Cu 2−x Se/g-C 3 N 4 heterojunction was successfully constructed using a one-step method and employed to photocatalytic H 2 evolution from water for the first time. The optimal Cu 2−x Se/g-C 3 N 4 -10 wt% exhibits an efficient H 2 evolution rate of 1954.9 μmol·g −1 ·h −1 , which is nearly 2.2 and 18.6 times higher than that of the pristine Cu 2−x Se and g-C 3 N 4 . This could owe to the improved light capturing ability, abundant active sites, efficient charge carriers’ separation for the appropriate band gap structures between Cu 2−x Se and g-C 3 N 4 . In addition, a photocatalytic H 2 production mechanism over Cu 2−x Se/g-C 3 N 4 heterojunction is analyzed based on the investigation on energy band structures and photoelectric properties of the components.
研究领域:
材料科学
·
光催化
·
能源转换
✓ 已验证
DOI
高影响因子
Journal of Cleaner Production
·
2021
·
IF 9.297
Xiaoying Chen,Jianlong Wang
Penicillin G (PG), a frequently detected β-lactam antibiotic in aquatic environment, has attracted extensive concerns because of its extensive application and potential to develop antimicrobial resistance. In this study, gamma radiation was used to degrade PG in water. The main influencing factors, such as initial PG concentration, pH value, absorbed dose, as well as water matrix (inorganic anions and organic matters) were investigated. Results showed that lower initial concentration, acidic condition (pH = 5.57), and higher absorbed dose was conducive to PG degradation. Besides, NO 3 − , HCO 3 2− , SO 4 2− and HPO 4 2− had negative influence on PG degradation, while Cl − had positive influence. Organic matters had negative influence. Twelve transformation intermediate products (TPs) were identified during PG degradation. Together with the density functional theory (DFT) calculation, four possible pathways of PG degradation were proposed. The results of antibacterial activity test demonstrated that the transformation of PG to TPs eliminated the antibacterial activity. Notably, except some para-modified products of PG, the toxicity of other TPs was reduced PG degradation. Moreover, no potential risk of bacterial mutagenicity during PG degradation was observed. In summary, ionizing radiation has good performance in PG degradation in the real wastewater .
研究领域:
环境科学
·
辐射化学
·
药学
·
毒理学
✓ 已验证
DOI
高影响因子
BIOSENSORS & BIOELECTRONICS
·
2015
·
IF 6.409
Qiang Chen,Junfeng Zuo,Jinfeng Chen,Ping Tong,Xiujuan Mo,Lan Zhang,Jianrong Li
In this paper, a novel label-free fluorescent biosensor for terbium (ш) (Tb 3+ ) was proposed based on structural conversion of G-quadruplex DNA mediated by Thioflavin T (ThT) and Tb 3+ . In the presence of K + , ThT could bind to K + -stabilized parallel G-quadruplex, giving rise to high fluorescence intensity . Upon the addition of Tb 3+ , Tb 3+ could competitively bind to parallel G-quadruplex leading to the structural change, which resulted in fluorescence decrease. The change of fluorescence intensity (Δ F = F 0 – F ) showed a good linear response toward the concentration of Tb 3+ over the range from 1.0 pM to 10.0 µM with a limit of detection of 0.55 pM. This proposed biosensor was simple and cost-effective in design and in operation with ultrahigh sensitivity and selectivity . Thus, the proposed biosensor could be a promising candidate for monitoring ultratrace Tb 3+ in environment.
研究领域:
生物化学
·
环境科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）