Nano Energy
·
2022
·
IF 19.069
Weili Fan,Ying Shen,Kaimo Deng,Qinghua Chen,Yang Bai,Liang Li
Planar-type perovskite solar cells have attracted extensive attentions due to their simple architecture and manufacturing. However, an imperfect heterojunction at the electron-selective contact side with abundant detrimental defects and weak binding strength induces severe charge recombination and device instability during long-term operation, which seriously hinders the further development and application prospect. Herein, we demonstrate π-conjugated oxysalt as an efficient interfacial binder and defect passivator for the stabilization of SnO 2 /perovskite interface. Theoretical modeling and experimental studies confirm the synergistic effect of ionic bonding and π-cation interaction in reducing defect density and mitigating charge recombination. An impressive power conversion efficiency up to 24.05%, a fill factor as high as 84.52%, and negligible hysteresis can be achieved in optimized solar cell. π-conjugated oxysalt interlayer can also improve device stability by offering a robust interface. Our work highlights the significance of chemical bonding engineering in constructing a high-quality heterojunction for efficient and stable perovskite solar cells.
研究领域:
材料科学
·
能源科学
·
化学工程
✓ 已验证
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2018
·
IF 6.434
Zimo Lou,Yizhou Li,Jiasheng Zhou,Kunlun Yang,Yuanli Liu,Shams Ali Baig,Xinhua Xu
Titanium carbide (TiC) with excellent electrical conductivity, chemical and thermal stabilities has been recognized as one of the most promising electrocatalysts. A novel cathode, titanium carbide doped palladium/nickel foam (TiC-Pd/Ni foam), was synthesized via electroless deposition to improve the performance of Pd/Ni foam in electrocatlytic hydrodechlorination (ECH). TiC can be co-precipitated onto the surface of cathode during galvanic replacement reaction between Pd(II) solution and Ni foam. Both constant potential and constant current tests proved that TiC-Pd/Ni foam cathode performed remarkably higher activity for 2,4-dichlorobenzoic acid (2,4-DCBA) than Pd/Ni foam cathode, owing to the excellent conductivity of TiC and enhanced water dissociation over TiC-Pd/Ni foam cathode. Under the optimized reaction conditions of –0.85 V ( vs Ag/AgCl), electrolyte of 10 mM and initial pH of 4, 99.8% of aqueous 2,4-DCBA (0.2 mM) was removed within 90 min. The removal process of the aqueous 2,4-DCBA obeyed first-order decay kinetic model. Over 86.3% of 2,4-DCBA can still be removed by TiC-Pd/Ni foam cathode in the fifth consecutive run within 120 min, which was much higher than that of Pd/Ni foam cathode (37.5%). Consequently, TiC-Pd/Ni foam cathode was a promising design for enhanced ECH activity and reduced operation cost.
研究领域:
环境科学
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材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2023
·
IF 8.2
Li Xiao,Hanbin Shan,Yi Wu
Epichlorohydrin-modified chitosan-Schiff base composite (CS/24Cl/ECH) prepared via the one-pot reaction as characterized by Fourier transform Infra-Red spectroscopy (FT-IR), X-ray powder diffraction (XRD), Differential scanning calorimetry (DSC) and Scanning electron microscope (SEM). Its removal ability of Pb(II) ions from aqueous solution was investigated. The adsorption of Pb(II) ions carried out at different initial pH, dose of CS/24-Cl/ECH, contact time and co-existing ions. The maximum adsorption capacity of Pb(II) ions was 170 mg/g. Finally, based on the absorption results, the adsorption of Pb(II) ions was fitted by single-layer Langmuir isotherm model and the pseudo-second-order (PSO) kinetics model. The absorption mechanism of Pb(II) ions was controlled by chemical coordination Pb(II) ions with the active sites on the surface of CS/24Cl/ECH composite. Also, CS/24Cl/ECH showed excellent recyclable efficiency up to 5 cycle and potential sorbent for other heavy metal ions.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2020
·
IF 9.038
Yichen Zhen,Qiang Zhang,Xiaoyan Zhang,Guanteng Zhang,Xiaoxin Chen,Chunxia Zhao
Chlorophenols (CPs) are still used as raw material or intermediate in some industries. Photocatalytic oxidation is free from secondary pollution, but the efficiency is restricted by some main factors. In this study, a novel high efficiency tubular up-flow magnetic film (TUMF) photocatalytic system was investigated based on the magnetic lanthanum doping core-shell Fe 3 O 4 @SiO 2 @TiO 2 (La-FST) nanoparticles. When the dosage of La-FST was 0.4 g/L, the flow velocity was 94.2 mL/min, and the circulated irradiation of 15 W maintained 40 min, the average removal rate of 2,4-dichlorophenol (2,4-DCP) was reduced significantly from 10 mg/L to 0.0803 mg/L by TUMF system, meeting the limits of the particular items (0.093 mg/L) from national environmental quality standards for surface water, avoiding the problem of photocatalyst separation and loss. The photoinduced holes ( h + ) was the key active radical to oxidize 2,4-DCP, and the main factors of TUMF system could be well controlled to achieve satisfactory effluent quality. A prediction method of photocatalytic reaction time in a multistage series TUMF system was established to remove 2,4-DCP from 100 mg/L to 0.5 mg/L, saving 86 min. The novel high-efficiency TUMF system provides a technical selection for the photocatalytic degradation of CPs and other refractory organics.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
PubMed
高影响因子
ChemSusChem
·
2020
·Vol. 13
·期 24
·6635-6642
·
IF 7.962
Yuxia Xu,Ting Xu,Jiaying Wang,Weiping Liu,Juan Wang
Graphical Continuous vapor generation : A wood-based evaporator in pyramid structure is designed for vapor generation under dark condition (0 kW m −2 ), through extracting environmental thermal energy. This performance enables the evaporator to produce pure water 24 h continuously, for a full-time daily operation. : Interfacial solar evaporators have great potential for clean water production; however, their evaporation performance relies greatly on the solar illumination condition, which is restricted by daily sunshine time and climates. Here, a wood-based vapor generator in pyramid structure is fabricated to achieve efficient water evaporation under dark condition (0 kW m −2 ) through efficient extraction of environmental thermal energy. The microvessels of wood provide fast water transportation whereas the tailored pyramid surface structure enables efficient evaporative cooling for extracting energy from the environment. The method enables fast water evaporation without the need of solar heat input. We demonstrate a vapor generation rate of up to 2.15 kg m −2 h −1 under dark condition (0 kW m −2 ), which is even 1.4 times faster than the theoretical limit of conventional solar thermal evaporators working under 1 sun (1 kW m −2 ) illumination condition. During the 24-h continuous evaporation test, the evaporator presented a daily vapor generation rate of up to 50.8 kg m −2 day −1 and 60.7 kg m −2 day −1 on cloudy and sunny day, respectively, offering a novel approach for the development of 24-h full-time water evaporators for seawater desalination and wastewater treatment.
研究领域:
材料科学
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能源技术
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环境工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nature Communications
·
2021
·Vol. 12
·期 1
·1-14
·
IF 14.919
Liu Haile,Li Yonghui,Sun Si,Xin Qi,Liu Shuhu,Mu Xiaoyu,Yuan Xun,Chen Ke,Wang Hao,Varga Kalman,Mi Wenbo,Yang Jiang,Zhang Xiao-Dong
Emerging artificial enzymes with reprogrammed and augmented catalytic activity and substrate selectivity have long been pursued with sustained efforts. The majority of current candidates have rather poor catalytic activity compared with natural molecules. To tackle this limitation, we design artificial enzymes based on a structurally well-defined Au 25 cluster, namely clusterzymes, which are endowed with intrinsic high catalytic activity and selectivity driven by single-atom substitutions with modulated bond lengths. Au 24 Cu 1 and Au 24 Cd 1 clusterzymes exhibit 137 and 160 times higher antioxidant capacities than natural trolox, respectively. Meanwhile, the clusterzymes demonstrate preferential enzyme-mimicking catalytic activities, with Au 25 , Au 24 Cu 1 and Au 24 Cd 1 displaying compelling selectivity in glutathione peroxidase-like (GPx-like), catalase-like (CAT-like) and superoxide dismutase-like (SOD-like) activities, respectively. Au 24 Cu 1 decreases peroxide in injured brain via catalytic reactions, while Au 24 Cd 1 preferentially uses superoxide and nitrogenous signal molecules as substrates, and significantly decreases inflammation factors, indicative of an important role in mitigating neuroinflammation.
研究领域:
生物化学
·
神经科学
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材料科学
·
催化
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Composites Science
·
2024
·Vol. 8
·期 7
·243
·
IF 3
Kishore Chand,M. Mustafa Azeem,Muhammad Nazim Lakhan,Mukhtiar Ahmed,Muhammad Jehanzaib Aslam,Ahmer Hussain Shah
The emergence of 2D materials has significantly expanded the wide range of nanomaterials with diverse applications. Notably, their high conductivity, catalytic efficiency, and hydrophobicity have fueled heightened research interests for water treatment applications. This research aimed to investigate the synthesis and characterization of MXene and reduced graphene oxide (rGO) nanocomposites with silver nanoparticles (Ag) for enhanced catalytic activity in the decomposition of Direct Blue-24 dye. In this study, we employed well-established methods, previously documented in the literature, to prepare two distinct nanocomposites. Novel nanocomposites, namely reduced graphene oxide–silver nanoparticles (rGO–Ag) and MXene–silver nanoparticles (MXene–Ag), were synthesized using the hydrothermal and direct reduction method with an ammoniacal solution (aqueous solution). Comprehensive characterization using advanced tools revealed that the introduced Ag particles integrated seamlessly onto the parent nanofilms of the Carbon derivatives, forming a secondary phase with enhanced catalytic functionality. These nanocomposites demonstrated significant improvements in the catalytic decomposition reactions in simulated wastewater. Verification involved the reduction reaction of Direct Blue-24 dye at known nanocomposite concentrations. The results indicated that MXene–Ag exhibited a superior catalytic activity of 98% in 10 min compared to the rGO–Ag nanocomposite films, which achieved 96% in 35 min. The results indicated that MXene–Ag nanocomposites exhibited a 20–25% increase in catalytic efficiency compared to the rGO–Ag nanocomposites. The outcomes of this research hold promise for practical applications in textile wastewater management and various industrial sectors dealing with mutagenic and carcinogenic chemicals containing azo and/or phthalocyanine products.
研究领域:
材料科学
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环境科学
·
化学工程
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2016
·
IF 3.299
Yajie Qian,Jing Zhang,Yalei Zhang,Jiabin Chen,Xuefei Zhou
In this study, a newly emerging oxidant nanoscale calcium peroxide (nCaO 2 ) was synthesized to degrade 2,4-dichlorophenol (2,4-DCP). nCaO 2 was prepared from nanoscale Ca(OH) 2 and H 2 O 2 and confirmed to be less than 150 nm in diameter and 62.23 m 2 · g −1 in specific surface area (SSA). For treating 2,4-DCP, the optimal ratio between Ca(OH) 2 and H 2 O 2 was 1:5. Compared with conventional CaO 2 , nCaO 2 was found to be more efficient for destructing 2,4-DCP. 2,4-DCP was completely degraded in 5 d by nCaO 2 while only 75.0% 2,4-DCP was destructed by conventional CaO 2 . The effects of solution pH and water matrix, including SO 4 2− , HCO 3 − and humic acid (HA) were examined. The reactive species in nCaO 2 system was investigated by photoluminescence (PL) technique and the quenching experiments. Results showed that hydroxyl radical (OH ) was the dominant reactive species for destructing 2,4-DCP. The major oxidation products identified in this study were 2-chlorophenol (2-CP), 4-chlorophenol (4-CP), phenol and benzoquinone (BQ). Our works gave an important insight into the use of nCaO 2 to degrade some organic contaminants which might provide some references for the application of nCaO 2 in chlorophenols contaminated groundwater remediation.
研究领域:
环境科学
·
化学
✓ 已验证
DOI
高影响因子
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
·
2024
·
IF 6.9
Linquan Dai,Bo Feng,Mengyan Tang,Yuangan Chen
It is challenging to separate between molybdenite and chalcopyrite due to their comparable hydrophobic characteristics. Inorganic depressants were previously used to separate two minerals, but the results were unsatisfactory and polluted the environment. In this study, the molybdenite and chalcopyrite were separated using a highly effective and ecologically safe depressant, 2,4-Diamino-6-hydroxypyrimidine (DAHP). According to the single mineral experiment, chalcopyrite is totally depressed while molybdenite has superior floatability. The efficacy of DAHP as the depressant was validated by further artificially mixed mineral flotation experiments, indicating the possibility of separating chalcopyrite and molybdenite. The adsorption capacity experiment results showed that the adsorption capacity of DAHP on the surface of chalcopyrite was greater than that on the surface of molybdenite. Zeta potential experiment results show that DAHP is adsorbed on the surface of chalcopyrite and molybdenite through static electrostatic interactions . X-ray photoelectron spectroscopy (XPS) experiment results show that DAHP is mainly adsorbed on chalcopyrite surface through –NH 3 + group, which hinders the adsorption of kerosene. The electrostatic contact between DAHP and molybdenite has the least effect on kerosene adsorption. This study shows that DAHP has the potential to separate chalcopyrite and molybdenite as an efficient and environmentally friendly depressant.
研究领域:
矿物加工工程
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2018
·
IF 11.698
Jiasheng Zhou,Zimo Lou,Kunlun Yang,Jiang Xu,Yizhou Li,Yuanli Liu,Shams Ali Baig,Xinhua Xu
In the present study, carbon black (CB), multi walled carbon nanotubes (MWCNTs), and granular activated carbon (GAC) were employed to support palladium (Pd) catalyst. The prepared Pd/CB, Pd/MWCNTs and Pd/GAC moveable catalysts were aimed to address the common issues (easy loss of catalyst and poor long-term performance) of normal fixed catalysts. The results of various characterizations (e.g., TEM, XRD, and XPS) clearly show that the Pd nanoparticles were successfully loaded onto the carbon-supports, especially CB and MWCNTs. And more importantly, the morphologies, Pd distribution, and chemical structure of these moveable catalysts were almost not changed after 3 h reaction. The moveable Pd/CB, Pd/MWCNTs, and Pd/GAC catalysts had good reactivity for 2,4-dichlorobenzoic acid (2,4-DCBA) dechlorination, and Pd/CB exhibited the best performance. The Pd/CB also shows the best adsorption capacity of 2,4-DCBA and dechlorination product (benzoic acid, BA), and the adsorption of BA was significantly inhibited in the presence of current due to the repulsion between the both negatively charged compounds and adsorbents. The removal of 2,4-DCBA and the generation rate of BA was improved with a pre-adsorption process, which was a promising strategy with higher dechlorination rate and shortened electrolysis time. Moreover, the loss of Pd catalyst was negligible during the 10 consecutive cycles experiment, and the improved longevity could be expected. These results suggested the good reactivity, stability, and reusability of moveable Pd/CB catalyst.
研究领域:
环境科学
·
化学工程
✓ 已验证
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2023
·
IF 7.7
Minghui Wang,Mei Zhang,Zhuoyu Wen,Chaoqun Li,Shilin Zhao,Jun Ma,Yang Liao,Xiaoting Li
Chlorophenols have been frequently detected in the environment, posing potential threats to both the natural ecosystem and human health. Semiconductor photocatalytic degradation of chlorophenols has become a prominent research focus. However, the development of high-performance and stable photocatalysts remains challenging. In this work, the nitrogen-modified ceria (N-CeO 2 ) was optimally prepared by microwave-assisted method and utilized for photocatalytic degradation of 2,4-DCP. The CeO 2 photocatalyst with 10% nitrogen doping (10% N-CeO 2 ) prepared under the optimal condition (microwave power of 560 W for 2 min and calcination temperature of 400 °C for 2 h) degraded 2,4-DCP with the highest removal efficiency of 93.51%. It was identified that the optimally prepared 10% N-CeO 2 photocatalyst had the nanometer size with surface imperfections and increased BET surface, and showed strongest photocurrent response and lowest charge transfer resistance among all the prepared materials. Additionally, an analysis of the band gap structure revealed that the band gap of 10% N-CeO 2 decreased from 3.05 eV (for pure CeO 2 ) to 2.42 eV, resulting in enhanced light absorption capacity. The radical trapping experiments and electron paramagnetic resonance (EPR) proved that the active species contributed to the degradation of 2,4-DCP mainly as •OH, •O 2 - . The potential photocatalytic degradation mechanism of 2,4-DCP was a continuous dechlorination and hydroxylation process with complete mineralization of the pollutant to CO 2 and H 2 O. This work can provide a feasible way to prepare high-efficiency nitrogen-doped ceria photocatalysts with great potential for the removal of chlorophenols.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2023
·
IF 22.1
Caizhi Lv,Pengchong Jiao,Hui Xin,Lan Wu,Gangfeng Ouyang,Xiandeng Hou
Insulator hydroxyapatite (HAp) was chosen as a candidate to construct full-spectrum photocatalyst. Glucose as a functional precursor was incorporated into HAp by coprecipitated method, and the glucose-modified HAp was then calcined under nitrogen atmosphere. With the loss of OH - group in HAp and the decomposition of glucose during the calcination, oxygen vacancies (OVs) for regulating the band gap, graphitic carbon (GC) as a good electron acceptor, and a channel for rapid carrier separation via the C-O-Ca forming between OV-HAp and GC can be simultaneously achieved. The as-prepared OV-HAp/GC displayed full-spectrum response and rapid separation of carriers. Moreover, it showed high degradation performance for 2, 4-dichlorophenol (2, 4-DCP), phenol, and tetracycline under visible, NIR, and full-spectrum. This strategy is not only facile, but also exhibits a certain universality. This work opens a new window for full-spectrum photocatalysts construction based on insulators, and large-scale production for practical use can be expected.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）