JOURNAL OF POLYMERS AND THE ENVIRONMENT
·
2016
·Vol. 25
·期 2
·156-164
·
IF 1.969
Liu Huifang,Gao Zhaoying,Hu Xueyan,Wang Zhanyong,Su Tingting,Yang Lei,Yan Song
Poly(3-hydroxybutyrate-co-hydroxyvalerate) (PHBV) is a biodegradable polymer synthesized in microorganisms. The application of PHBV is limited by certain material disadvantages. Poly(ε-caprolactone) (PCL) possesses excellent thermodynamic and mechanical properties and was used to modify PHBV in the presence of triethyl citrate (TEC) and dicumyl peroxide (DCP), which was used as plasticizer and grafting agent, respectively. The effects of PCL and additive agents on the mechanical, thermal, amphipathic and degradability behaviors of the blends were investigated. The results showed that the mechanical properties of the PHBV blends improved by PCL incorporation and improved even further after TEC and DCP addition. The addition of DCP could not induce an increase in crystallization temperature but improved the crystallization degree of the blends. The presence of hydrophilic groups in TEC leads to an apparent increases in the hydrophilicity of the PHBV blends. A PHBV/PCL blend (40/60) with TEC (20 wt.%) and DCP (0.5 wt.%) was chosen for its good mechanical properties and hydrophilicity. The chosen ratio of the blends was also shown a preferable degradation activity by biodegradation assay using Pseudomonas mendocina. The addition of TEC and DCP has no conspicuous negative effect on the biodegradation.
研究领域:
材料科学
·
微生物学
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DOI
高影响因子
Journal of Chemistry
·
2020
·
IF 1.79
Xiaojuan Wu,Liping Chen,Guoning Rao,Wanghua Chen,Ruili Yin
To reduce the fire and explosion accident of dicumyl peroxide (DCP) in experiment and production, the thermal hazards of DCP and 40% mass content DCP in ethyl benzene (40% DCP) have been studied by the differential scanning calorimeter (DSC) and the accelerating rate calorimeter (ARC) in this paper. DSC experiment showed that ethyl benzene has no effect on the characteristic parameters of thermal decomposition of DCP, such as the temperature of the exothermic peak (Tpeak) and the decomposition energy (Ea), and the thermal decomposition reaction of 40% DCP followed the one-step reaction principle. ARC experiment showed that with the increase of inertia factor (Φ), the measured initial decomposition temperature (Ton) would be higher and the caculated Ea and pre-exponential factor (A) would be greater. It was also proved that after modification of Φ, TD24 was relatively consistent near Ton, but different at higher temperatures. Fisher's correction method was used to verify the necessity of consistency between experimental conditions and prediction conditions.
研究领域:
化学工程
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安全科学
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DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Huining Zhang,Zongqian Zhang,Yuling Tang,Jianping Han,Zhiguo Wu,Zhiqiang Wei,Shaofeng Wang,Yang Cao,Seng Zhang,Yue Zhang
This study focuses on a novel ternary heterojunction catalyst for the removal of 2,4-dichlorophenol (2,4-DCP), an organic pollutant that is difficult to degrade. An efficient CuInS 2 /BiOI/Bi 2 MoO 6 ternary heterojunction photocatalyst was formed by constructing a CuInS 2 /BiOI composite layer on a Bi 2 MoO 6 substrate using an in-situ growth technique. The microstructure and photoelectric conversion properties of the catalysts were comprehensively resolved by systematic material characterization, including scanning electron microscopy (SEM) observation, X-ray photoelectron spectroscopy (XPS) analysis and photoelectrochemical testing. The experimental results showed that the optimized catalyst at a loading of 2.0 g/L exhibited excellent photocatalytic degradation efficiency against 20 mg/L concentration of 2,4-DCP at neutral pH, reaching 80.3 % degradation rate in 120 min. This high performance was mainly attributed to the enhanced charge-carrier separation mechanism at the heterojunction interface, which effectively enhanced the utilization and transfer rate of photogenerated electron-hole pairs and enhanced the photocatalytic activity of the catalyst. In addition, the study also deeply explored the conversion pathway of elemental chlorine in the photocatalytic system, elucidated the mechanism of 2,4-DCP degradation and dechlorination, and provided a theoretical basis for further improving the environmental adaptability and dechlorination efficiency of the catalyst. Overall, the CuInS 2 /BiOI/Bi 2 MoO 6 ternary heterojunction photocatalysts proposed in this study demonstrate a broad application prospect in the purification of 2,4-DCP and other organic pollutants, and open up a new way to solve the problems of industrial wastewater treatment, which is of great environmental significance and scientific value.
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
RSC Advances
·
2025
·Vol. 15
·期 27
·21555-21567
·
IF 4.6
Hui Liu,Xinkai Gong,Linting Zhang,Maocai Shen,Guoxia Yin,Yulai Wang
The widespread application of biochar has inevitably led to the release of various amounts of biochar-derived dissolved organic matter (BDOM) and gradual formation of a biochar-related environment, which significantly influences the environmental behaviors of contaminants. However, the impacts of BDOM on chlorophenol photodegradation remain unknown. In this study, we prepared BDOM from crop residue biochar to evaluate its effects on 2,4-DCP photodegradation. The results showed that 2,4-DCP undergoes self-sensitized photodegradation via the self-production of 1O2 and ˙OH in the absence of BDOM. The BDOM enhanced 2,4-DCP photodegradation owing to the production of 3BDOM*, 1O2 and ˙OH, contributing 60%, 22.2% and 4.4%, respectively. Nevertheless, this facilitation effect was weakened with increasing BDOM content because of the enhanced light screening and quenching effects. Low molecular weight (MW, <1 kDa) fractions predominated in BDOM, with a contribution of 62.7%; moreover, these fractions had a higher potential to produce 3BDOM* and 1O2 and played more important roles in 2,4-DCP indirect photodegradation than high MW fractions. The high MW fractions (MW > 1 kDa) exhibited a stronger light screening effect that decelerated the photodegradation of 2,4-DCP. Furthermore, the degradation of 2,4-DCP by 3BDOM* occurred via both energy and electron transfer pathways, in which low MW fractions of BDOM were predominantly formed via the energy transfer pathway, while high MW fractions were mainly formed through the electron transfer pathway. These results suggest that the low MW fractions of BDOM have stronger photoactivity and may play more significant roles in influencing the environmental behaviors of refractory pollutants.
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PubMed
高影响因子
Catalysis Science & Technology
·
2022
·Vol. 12
·期 22
·6771-6781
·
IF 6.177
Lianghai Xia,Lingdong Kong,Jie Tan,Yuwen Wang,Shengyan Jin,Chao Wang
BiOBr can degrade pollutants under visible light, and it is a new star in the field of photocatalysis. However, its practical application still faces great challenges, and it still needs to be designed and modified to obtain high catalytic performance for efficient degradation of organic pollutants. Herein, we have realized the simple preparation and efficient catalysis of a BiOBr composite catalyst. This catalyst combines the dual effects of stable adsorption and efficient degradation. This spherical catalyst is composed of surfactant PVP and BiOBr and has higher photocatalytic efficiency. It is found that PVP on the surface of BiOBr firmly adsorbs 2,4-dichlorophenol on the surface of the catalyst, and the petal like microsphere structure makes full use of light energy to achieve high-efficiency photocatalysis. The catalytic effect of the composite catalyst is 1.53 times higher than that of the pure BiOBr catalyst. This study will help us better understand the comprehensive effects of adsorption and degradation of surfactants and catalytic materials, and develop new and reliable green photocatalysts.
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
WATER AIR AND SOIL POLLUTION
·
2017
·Vol. 228
·期 9
·1-11
·
IF 1.702
Feng Weihua,Zhang Lanxin,Fang Jianzhang,Lu Shaoyou,Wu Shuxing,Chen Yi,Fang Zhanqiang
Graphitic carbon nitride (g-C 3 N 4 ) is a photocatalyst with wide application in removal of organic pollutants. In this study, we designed a porous g-C 3 N 4 (p-g-C 3 N 4 )/8-quinolinolato iron(III) (Q 3 Fe)/H 2 O 2 system to enhance the organic pollutant removal efficiency by combining photocatalysis and Fenton interaction under neutral condition. The p-g-C 3 N 4 was prepared through a two-step thermal oxidation reaction. Afterwards, Q 3 Fe-coupled p-g-C 3 N 4 was prepared by an impregnating method. The 2,4-dichlorophenol (2,4-DCP) photodegradation ratio and decomposition rate of the p-g-C 3 N 4 /Q 3 Fe/H 2 O 2 system are approximately 5 and 18 times as high as those of individual p-g-C 3 N 4 system, respectively. Besides, its degradation rate is 4.3 times as high as that in the p-g-C 3 N 4 /H 2 O 2 system. Meanwhile, Q 3 Fe/g-C 3 N 4 also exhibits higher activity than individual p-g-C 3 N 4 in 2,4-DCP photo-decomposing. On the basis of the results of the radical trapping experiments and the Fe(II) concentration in different systems, the synergistic effect between photocatalysis and Fenton reaction is vital for the efficient pollutant degradation. The coupled system combining p-g-C 3 N 4 with Q 3 Fe and H 2 O 2 shows potential for efficient treatment of recalcitrant organic pollutants. The combined system in this work indicated a new idea for the decomposition of organic pollutants.
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
JOURNAL OF APPLIED POLYMER SCIENCE
·
2026
·
IF 2.8
Zhongtian Li,Zhenghao Zhang,Wuchao Cheng,Jieting Geng,Lin Xia
Eucommia rubber (ER) foam is a unique bio-based material that combines a porous foam structure with crystalline and crosslinked networks. Nevertheless, the interplay between vulcanization/crosslinking and foaming processes in ER remains insufficiently explored. In this study, two representative vulcanization systems, namely sulfur and dicumyl peroxide (DCP), were innovatively employed to fabricate Eucommia rubber (ER) foams. For the first time, this work systematically examines the effects of crosslinking agent type and content on the foaming behavior, mechanical properties, and micromorphology of ER foams. The primary scientific objective is to establish the structure–property relationship between the vulcanization system and the foaming kinetics of ER. Detailed experimental results reveal that under optimized conditions (0.8 phr sulfur and 0.4 phr DCP [parts per hundred parts of rubber by weight]), the ER foams exhibit optimal foaming ratios of 639% and 748%, respectively, demonstrating outstanding foaming capability. Sulfur-cured foams possess a notably higher proportion of open-cell structures and remarkable shape memory properties. These findings demonstrate the critical role of the crosslinking system in regulating the structure and performance of ER foams, highlighting their potential for use in advanced areas such as biomedical, damping, and separation materials.
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高影响因子
APPLIED SURFACE SCIENCE
·
2018
·
IF 4.439
Gaoyuan Long,Jiafeng Ding,Lihong Xie,Runze Sun,Mengxia Chen,Yanfang Zhou,Xiuying Huang,Gaorui Han,Yajun Li,Weirong Zhao
Chlorophenols (CPs) have been considered as a kind of priority environmental pollutants for their potential detrimental effects, and photocatalytic reduction dechlorination tend to be a promising approach to CPs’ removal. In this work, 2,4-dichlorophenol (2,4-DCP) was adopted as the model pollutant of CPs, and a simple mixing and heating method was employed to prepare graphitic carbon nitride and bismuth tungstate (g-C 3 N 4 /Bi 2 WO 6 ) binary photocatalysts. Under UV–vis light irradiation and anoxic atmosphere, the g-C 3 N 4 /Bi 2 WO 6 samples exhibited enhanced photocatalytic activities. The optimal dechlorination rate constant of 2,4-DCP over g-C 3 N 4 /Bi 2 WO 6 (weight ratio 3:7) was 1.13 h −1 , 7.6 and 8.9 times higher than that of pristine g-C 3 N 4 and Bi 2 WO 6 respectively. The enhanced activities originated from the effective suppression of charge recombination and extended spectrum absorption range. Kinetic studies revealed that the dechlorination processes followed the pseudo-first-order model. The photocatalytic mechanism of 2,4-DCP over g-C 3 N 4 /Bi 2 WO 6 was discussed in detail, and based on which, a mediator-free Z-scheme mechanism was proposed. This work extends the application range of g-C 3 N 4 /Bi 2 WO 6 photocatalyst and provides a new insight into environmental remediation.
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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高影响因子
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
·
2024
·Vol. 26
·期 19
·14194-14204
·
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
JOURNAL OF HAZARDOUS MATERIALS
·
2015
·
IF 4.529
Yunfang Chen,Jianzhang Fang,Shaoyou Lu,Yan Wu,Dazhi Chen,Liyan Huang,Cong Cheng,Lu Ren,Ximiao Zhu,Zhanqiang Fang
This study aims at photocatalytic degradation of 2,4-DCP with the assistance of H 2 O 2 in aqueous solution by a composite catalyst of Ag-rectorite. The catalysts were prepared via a novel thermal decomposition method followed after the cation-exchange process. The synthesized nano-materials were characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), Brunauer–Emmett–Teller (BET) surface analyzer, Ultraviolet–visible light (UV–vis) absorption spectra, field-emission scanning electron microscope (FE-SEM) and transmission electron microscope (TEM). The different mechanisms of degradation process with or without visible light irradiation were discussed, respectively. Moreover, the degradation efficiency of 2,4-DCP wastewater under Ag-rectorite/H 2 O 2 /visible light system was investigated by series of experiments, concerning on effects of major operation factors, such as H 2 O 2 dosage and the initial pH value. The highest degradation rate was observed when adding 0.18 mL H 2 O 2 into 50 mL 2,4-DCP solution, and the optimal pH value was 4 for the reaction. Afterwards, total organic carbon (TOC) experiments were carried out to evaluate the mineralization ratio of 2,4-DCP.
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
Journal of Water Process Engineering
·
2022
·
IF 7.34
Qi Jing,Wenhui You,Shuo Qiao,Yuheng Ma,Zhongyu Ren
In this study, nano zero-valent iron-reduced graphene oxide (NZVI-rGO) was successfully synthesized and applied for 2,4-DCP and Cr (VI) removal. Characterization results show that NZVI particles were successfully loaded on rGO nanosheets increasing the dispersibility of particles. Removal experiments indicate that the existence of rGO significantly enhanced the removal efficiency of 2,4-DCP and Cr (VI) compared with bare nano zero-valent iron. The removal rate of 2,4-DCP and Cr(VI) increased from 33.24 % and 63.14 % to 100 % and 98.40 %, respectively. Pseudo-second-order model and Langmuir isotherm model could better explain the 2,4-DCP removal process. The removal mechanism of 2,4-DCP in the process of simultaneous removal is adsorption, including π-π interaction, hydrogen bonding and n-π EDA interaction between Cr(VI) and 2,4-DCP. Cr(VI) is firstly fixed on the surface of NZVI-rGO by electrostatic interaction. The electrostatic interaction between γ-FeOOH and Cr(VI) and the strong connection formed by n-π EDA interaction between Cr(VI) and 2,4-DCP promote the adsorption of Cr(VI) in coexisting system. Subsequently, Cr(VI) is reduced to Cr(III) by accepting the electrons donated by NZVI, and Cr(III) interacts with OH − in the solution to generate Cr(OH) 3 precipitate. The existence of rGO accelerates the rate of electron transfer to Cr(VI) in NZVI. This study provides theoretical support for remediation of combined pollution of chlorinated organics and heavy metals.
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
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
·
2025
·
IF 4.6
Yixuan Bao,Yuping Zhang,Shilei Wang,Xuemei Liu,Jun Ma,Xiaoting Li,Yang Liao
The widespread use of 2,4-dichlorophenol (2, 4-DCP) in the paper manufacturing, dye synthesis, textile processing, and agriculture applications has led to its persistent accumulation in the ecosystems, posing significant risks to environmental safety and human health. This study developed a MIL-101(Fe)-derived porous carbon material for efficient degradation of 2, 4-DCP through potassium persulfate (PDS)-based advanced oxidation processes. Characterization demonstrated that the synthesized material, compared with its MIL-101(Fe) precursor, possessed enhanced specific surface area and pore size distribution, which could synergistically promote both adsorption and catalytic degradation of 2, 4-DCP. The optimized 700Fe-C/PDS system (0.3 g/L catalyst, 0.5 mM oxidant) achieved 95.99 % degradation rate for 50 mg/L 2, 4-DCP within 90 min, showing rapid degradation ability. Notably, the material maintained >94.34 % degradation efficiency for 2, 4-DCP after five times of reuse without requiring pH adjustment, highlighting exceptional stability and practical applicability. Reactive oxygen species quenching experiments and electron paramagnetic resonance (EPR) analysis elucidated that both radical and non-radical pathways contributed to the degradation process, with 1 O 2 playing a dominant role in the system. Furthermore, the catalyst demonstrated remarkable generalizability, eco-friendliness and effectively degradation for 2, 4-DCP in real municipal wastewater effluent and other organic pollutants including tetracycline, ciprofloxacin, acetamiprid, and sulfamethoxazole. This work provides an efficient, stable, and easily recyclable catalytic material, offering a new strategy for addressing diverse organic contaminants in complex water matrices.
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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DOI
高影响因子
危险品化学品经营许可证（带存储）