FUEL
·
2023
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IF 7.4
Yuwei Ma,Yan Li,Fenglong Zhang,Fei Ruan,Ruifen Wang,Guangtong Hai,Juming Liu,Jinxiao Bao
Ni directional doping in the lattice of CdS V with the Ni cations targeted linked to P (CdS V -Ni-P) was successfully synthesized via a step wise assembly method, which exhibited an excellent photocatalytic hydrogen production performance. The photoelectric performance characterization proved that the Ni directional doping and Ni cations targeted linked with P in CdS V -Ni-P not only accelerating the photo-generated electrons transfer but also decreasing efficiency of the charge recombination. The density functional theory (DFT) calculations proved that CdS V -Ni-P can also induce more charge-carriers participate in photocatalytic reaction and decrease electron binding restriction capacity. Moreover, the results of UV–vis DR spectra and VB-XPS spectra confirmed that the construction of this CdS V -Ni-P could effectively narrow the bandgap. Meanwhile, the result of Gibbs free energy demonstrated the S-H adsorption bond in CdS V -Ni-P was get weaken, which is benefit for hydrogen desorption from S sites, thus achieving a high hydrogen evolution reaction (HER) result. Based on the synergistic effects, CdS V -Ni 6.7 -P 9.6 presented a relatively high hydrogen evolution rate of 167.5 mmol h -1 g −1 under the visible light irradiation (λ ≥ 420 nm), which is almost 60 times of CdS V .
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高影响因子
RESEARCH ON CHEMICAL INTERMEDIATES
·
2023
·Vol. 49
·期 9
·3747-3764
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IF 3.3
Wei Pingping,Gao Juan,Cai Hanyong,Zheng Lingcheng,Wang Yanfen,Li Yang,He Gang
Z-type 2D/2D C, N, S co-doped TiO 2 /g-C 3 N 4 (DTCN) photocatalysts possessing high catalytic activity were prepared via a simple ultrasonic recombination method. The catalysts’ microscopic morphology, crystal structure, chemical composition, and optical properties were investigated with scanning electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy, and ultraviolet–visible tests. The photocatalytic activity was also assessed via the degradation of the organic pollutant RhB. The results showed that DTCN could achieve 85.3% degradation of the target pollutant within 60 min, which was 2.47 times (34.5%) and 1.76 times (48.5%) more than TiO 2 and g-C 3 N 4 . The first-order kinetic constants of DTCN reached 0.02838, which was 4.11 and 2.66 times that of TiO 2 and g-C 3 N 4 . Nonmetallic C, N, S (CNS) co-doping effectively improved sunlight utilization of TiO 2 nanosheets through the generation of impurity bands in the forbidden band area. The Z-type heterojunction formed via the coupling of g-C 3 N 4 and CNS–TiO 2 promoted the separation of photoinduced carriers and improved the charge transfer efficiency, boosting the TiO 2 photocatalytic performance. Furthermore, the 2D–2D heterojunction provided a high-speed transport channel for charges. Graphical Abstract Z-type 2D–2D DTCN nanosheet heterojunctions were successfully fabricated. Nonmetallic CNS co-doped effectively improved sunlight utilization of TiO 2 nanosheets through the generating of impurity bands in the forbidden band area. Furthermore, the Z-type heterojunction formed via the coupling of g-C 3 N 4 and CNS–TiO 2 promoted the photoinduced carrier separation and improved the charge transfer efficiency, so boosting the TiO 2 photocatalytic performance.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2023
·
IF 7.2
Lingxin Meng,Mengchi Ju,Jingmei Xu,Xuan Chen,Pengyun Zhao,Jinxuan Lei,Tian Lan,Fenglong Chen,Ziyi Hu,Zhe Wang
In this paper, sulfonated poly(arylene ether ketone sulfone)s containing fluorenyl groups (F-SPAEKS) were synthesized. MIL-101-NH 2 was prepared by hydrothermal reaction . The carboxyl group was modified to MIL-101-NH 2 by amidation reaction, then difunctional MIL-101-NH 2 was designed (MIL-101-NH 2 -COOH). The fillers of MIL-101-NH 2 and difunctional MIL-101-NH 2 -COOH were added into F-SPAEKS matrix to prepare the hybridized membranes, respectively. The structures and morphologies of MIL-101-NH 2 , MIL-101-NH 2 -COOH and hybridized membranes were characterized by SEM, FT-IR, 1 H NMR, XPS and XRD . Among these prepared hybridized membranes, FSMNC-4 (the weight percentage of MIL-101-NH 2 -COOH was 4%) had the highest proton conductivity (159.90 mS cm −1 at 80 °C). The proton conductivity of FSMNC-4 was 1.79 times higher than that of pure F-SPAEKS (89.30 mS cm −1 at 80 °C) and 1.25 times higher than that of FSMN-4 (the weight percentage of MIL-101-NH 2 was 4%) (127.55 mS cm −1 at 80 °C), respectively. Meanwhile, the increase of hydrophilic groups also resulted in the highest water absorption of FSMNC-4 (21.57% at 80 °C). The ionic cross-linked networks reduced the swelling ratio of the hybridized membranes. The swelling ratio of all hybridized membranes was lower than 10%. FSMNC-4 also had good thermal and oxidative stability . The open circuit voltage (OCV) and maximum power density of FSMNC-4 were 0.994 V and 466 mW/cm 2 , respectively. The above results indicated that FSMNC-4 had a promising potential to be applied in PEMFCs.
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高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2023
·
IF 2.6
Qiongqiong Luo,Shaoheng Wang,Dehua Cai,Ning Zhang,Dewen Zeng
A ZnSO4 electrolyte solution with impurity salts such as MnSO4 and MgSO4 is often used in zinc hydrometallurgical processes over a wide temperature range. CaSO4·2H2O(s) scaling and fluorine corrosion are two encountered problems in the process. Understanding the CaF2(s) solubility behavior in MSO4 (M = Zn, Mn, Mg) aqueous solutions at various temperatures helps remove Ca2+ and F– ions from the solution. However, CaF2(s) solubility data, especially at temperatures >298 K, have not been published yet. In this work, CaF2(s) solubilities in the CaF2–CaSO4–MSO4–H2O (M = Zn, Mn, Mg) quaternary systems and its subsystems of the CaF2–MSO4–H2O (M = Zn, Mn, Mg) at 348.15 K and the CaF2–CaSO4–MSO4–H2O (M = Zn, Mg) quaternary systems and the CaF2–MgSO4–H2O ternary system at 298.15 K are systematically measured. The results show that the CaF2(s) solubility in the MSO4 (M = Zn, Mn, Mg) aqueous solution of a certain concentration at 348.15 K is considerably higher than that at 298.15 K. At 298.15 and 348.15 K, the salting-in effect of MSO4 (M = Zn, Mn, Mg) on CaF2(s) solubility is enhanced with the order ZnSO4 < MnSO4 < MgSO4. At both temperatures, CaF2(s) solubilities in CaSO4·2H2O(s)- or CaSO4(s)-saturated MSO4 (M = Zn, Mn, Mg) aqueous solutions are generally lower than those in pure MSO4 (M = Zn, Mn, Mg) aqueous solutions. Particularly, the salting-in effect of MgSO4 on CaF2 is so strong that CaF2(s) dissolves completely and is converted to CaSO4·2H2O(s) and MgF2(s) in a concentrated MgSO4 aqueous solution. Hence, this study indicates that high temperatures and high salt concentrations increase the CaF2(s) solubility, making the removal of Ca2+ and F– ions from the system challenging. Further, the existence of impurity salts MnSO4 and MgSO4 makes it more difficult.
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ANALYTICAL AND BIOANALYTICAL CHEMISTRY
·
2023
·Vol. 415
·期 19
·4649-4660
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IF 4.3
Du Huiyan,Li Xia,Xu Shuling,Cheng Guiguang,Xue Qingwang,Xu Hongxia
This study proposes a nitrogen and sulfur co-doped carbon dot (N/S-CD)-based FRET ratiometric fluorescence aptasensing strategy modulated with entropy-driven DNA amplifier for sensitive and accurate detection of ochratoxin A (OTA). In the strategy, a duplex DNA probe containing OTA aptamer and complementary DNA (cDNA) is designed as a recognition and transformation element. Upon sensing of target OTA, the cDNA was liberated, and triggered a three-chain DNA composite-based entropy-driven DNA circuit amplification, making CuO probes anchor on a magnetic bead (MB). The CuO-encoded MB complex probe is finally turned into abundant Cu 2+ , which oxidizes o-phenylenediamine (oPD) to generate 2,3-diaminophenazine (DAP) with yellow fluorescence and further triggers FRET between the blue fluorescent N/S-CDs and DAP. The changes in ratiometric fluorescence are related to the OTA concentration. Originating from the synergistic amplifications from the entropy-driven DNA circuits and Cu 2+ amplification, the strategy dramatically enhanced detection performance. A limit of detection as low as 0.006 pg/mL of OTA was achieved. Significantly, the aptasensor can visually evaluate the OTA via on-site visual screening. Moreover, the high-confidence quantification of the OTA in real samples with results consistent with that of the LC-MS method indicated that the proposed strategy has practical application prospects for sensitive and accurate quantification in food safety.
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PubMed
高影响因子
CHINESE JOURNAL OF CATALYSIS
·
2022
·
IF 12.92
Yingcong Wei,Qiqi Zhang,Ying Zhou,Xiongfeng Ma,Lele Wang,Yanjie Wang,Rongjian Sa,Jinlin Long,Xianzhi Fu,Rusheng Yuan
Simultaneous generation of H 2 fuel and value-added chemicals has attracted increasing attention since the photogenerated electrons and holes can be both employed to convert solar light into chemical energy. Herein, for realizing UV-visible-NIR light driven dehydrogenation of benzyl alcohol (BA) into benzaldehydes (BAD) and H 2 , a novel localized surface plasmon resonance (LSPR) enhanced S-scheme heterojunction was designed by combining noble-metal-free plasmon MoO 3– x as oxidation semiconductor and Zn 0.1 Cd 0.9 S as reduction semiconductor. The photoredox system of Zn 0.1 Cd 0.9 S/MoO 3– x displayed an unconventional reaction model, in which the BA served as both electron donor and acceptor. The S-scheme charge transfer mechanism induced by the formed internal electric field enhanced the redox ability of charge carriers thermodynamically and boosted charge separation kinetically. Moreover, due to the LSPR effect of MoO 3− x nanosheets , Zn 0.1 Cd 0.9 S/MoO 3− x photocatalysts exhibited strong absorption in the region of full solar spectrum. Therefore, the Zn 0.1 Cd 0.9 S/MoO 3− x composite generated H 2 and BAD simultaneously via selective oxidation of BA with high production (34.38 and 33.83 mmol·g −1 for H 2 and BAD, respectively) upon full solar illumination. Even under NIR light irradiation, the H 2 production rate could up to 94.5 mmol·g −1 ·h −1 . In addition, the Zn 0.1 Cd 0.9 S/MoO 3– x composite displayed effective photocatalytic H 2 evolution rate up to 149.2 mmol·g −1 ·h −1 from water, which was approximate 6 times that of pure Zn 0.1 Cd 0.9 S. This work provides a reference for rational design of plasmonic S-scheme heterojunction photocatalysts for coproduction of high-value chemicals and solar fuel production.
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高影响因子
ACS Applied Energy Materials
·
2022
·
IF 6.959
Mingxiu Hou,Jianshun Feng,Fanghui Wang,Weiyu Wang,Zhenjiang Li,Jie Liu,Fengli Yu,Lei Wang
Lithium–sulfur (Li–S) batteries have been limited by their poor electrochemical performance due to the large volume change and severe shuttle effect during cycling. Binders serve as an essential role in sulfur electrodes and can stabilize the mechanical integrity of the electrode. It also has been demonstrated that designing strong-affinity binders is a feasible and facile method to suppress the shuttle effect. Therefore, in this work a strong-affinity elastic network binder is designed for high-performance Li–S battery coupling with tannic acid (TA) and polyurethane (PU). Firstly, the rich hydrogen bonds between TA and PU result in a mechanically robust network to keep the sulfur electrode from cracking in the cycling process. Secondly, the selected TA with abundant phenolic hydroxyl groups possesses strong adsorption capability toward polysulfides, which can efficiently restrain the shuttle effect. Hence, the cycling stability of Li–S batteries using P1T1 binder is significantly improved, maintaining the capacity of 602.5 mAh g–1 after 500 cycles at the current density of 0.5 C.
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高影响因子
INORGANIC CHEMISTRY
·
2022
·
IF 5.436
Shan Jiang,Xuemei Jia,Jing Cao,Haili Lin,Fang Li,Yue Sun,Shifu Chen
Photocatalytic overall water splitting simultaneously generates O2 and H2; this is a potential strategy to solve the energy shortage problem. Elemental phosphorus (RP) displays ultralow visible light performance for O2 and H2 generation; thus, a novel α-Fe2O3/RP composite is designed and prepared by a low-temperature hydrothermal method via loading a trace amount of α-Fe2O3. In the experiment, the 1.5% α-Fe2O3/RP composite showed the best overall water splitting performance, which is 6.9 times that of bare RP. Through various characterization studies, the recombination rate of charges is significantly reduced. It is largely ascribed to the matched energy band structure of the two photocatalysts and the interface contact between α-Fe2O3 and RP, which efficiently separates the photocarriers through an S-scheme mode and realizes the obvious enhancement of overall water splitting performance. Moreover, α-Fe2O3/RP maintains high activity when it is persistently irradiated for 15 cycles. The research provides insight into the exploitation of low-cost, high-activity, and stable RP-based photocatalysts to achieve visible light induced overall water splitting activity to generate O2 and H2.
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PubMed
高影响因子
FOOD CHEMISTRY
·
2022
·
IF 9.231
Jiannan Chen,Xiuhua Xia,Peizhen Li,Hang Yu,Yunfei Xie,Yahui Guo,Weirong Yao,He Qian,Yuliang Cheng
Natural N and S co-doped carbon dots (NSCDs) were synthesized via hydrothermal synthesis using food-derived crawfish shells as green precursors. The relationship between quantum yield (QY) and protein content of six crawfish shells treated with different alkalis was investigated. The synthesized NSCDs displayed a large QY of 18.57 %, which was higher than most of the chitin-derived CDs. Due to the oxidation of hydroxyl radicals, adding H 2 O 2 and horseradish peroxidase (HRP) quenched the fluorescence of NSCDs, resulting in a detection limit (LOD) of 1.25 μM for H 2 O 2 . The addition of pentachlorophenol (PCP) was supposed to consume part of the hydroxyl radicals and protect NSCDs from being oxidized. Accordingly, a facile and rapid “off–on” fluorescence sensor was developed to detect PCP with a LOD of 2.30 μM. Further, the method described was successfully used to detect PCP in three real samples.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Yabin Li,Jingyao Qi,Jimin Shen,Pengwei Yan,Jing Kang,Binyuan Wang,Shuyu Wang,Jinxiang Zuo,Zhonglin Chen
Peroxymonosulfate (PMS)-based advanced oxidation processes are perceived as a novel strategy for water purification. However, designing an efficient catalyst with a low metal leaching rate remains challenging. Here, under palygorskite (PAL) mediation, 16%-CoCu 0.4 Fe 1.6 O 4 @PAL (16%-CCFO@PAL) was constructed, exhibiting ample oxygen vacancies (V O ) and low metal leakage. The V O was confirmed by systematic characterizations and theoretical calculations. The catalyst showed the efficient catalytic capacity for PMS by dual-path (i.e., metal sites and V O ) activation. Large amounts of SO 4 •- , •OH, and 1 O 2 were produced, greatly destroying bisphenol S (BPS). BPS removal was greater than 99% within 25 min in the 16%-CCFO@PAL/PMS system. At the metal sites, PMS was activated under the synergistic effects of Co(II)/Co(III), Fe(II)/Fe(III), and Cu(I)/Cu(II) pairs and electron transfer. In addition to metal sites, the V O was also an activation center for PMS, which mainly captured the O I atom in [H-O I -O II -SO 3 ] - , donating an electron to O I and promoting SO 4 •- generation. The interfacial reaction mechanism was explored by in situ tests, and a dual-path activation mechanism was proposed. This work provides a new perspective for V O -assisted PMS activation for water treatment.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Hao Wang,Yongrong Zou,Tao Luo,Mehdi Benouahmane,Danna Zhou,Feng Wu
In recent years, a new strategy of using sulfite (S(IV)) to replace persulfates (peroxydisulfate (PS) and peroxybisulfate (PMS)) for sulfate radical based advanced oxidation process (SR-AOP) has emerged as one of the potential alternatives in the field of AOPs. Although the thermal activation of PS and PMS has been investigated extensively, that of S(IV) has not yet been explored. In this work, As(III) oxidation in a heat–S(IV) system was investigated first to demonstrate the feasibility of thermal activation of S(IV). Results showed that S(IV) can be activated to oxidize As(III) by heating the reactant solution from room temperature to above 50℃. Almost complete oxidation of 5 μM As(III) in water at pH 7 with addition of 1 mM S(IV) was achieved at 70 °C within 30 min. As(III) oxidation in the heat–S(IV) system was strongly dependent on the dissolved oxygen in water. Radical-scavenging experiments and electron spin resonance analysis demonstrated that the main active species responsible for As(III) oxidation was SO 4 •− . On the basis of thermal activation, a new system of SR-AOPs, namely, heat–electro-S(IV) system, the coupling thermal and electrochemical activations was established with ruthenium-plated iridium electrodes at a voltage of 3 V. It achieved complete oxidation of 50 μM As(III) in water at pH 7 at 50 °C with the addition of 2 mM S(IV) after reaction for 30 min. This work provides a new activation method for SR-AOPs with S(IV) as the precursor of reactive species and helps in understanding the reaction of S(IV) autooxidation.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Zhengzheng Guo,Penggang Ren,Jin Wang,Xin Hou,Jiahui Tang,Zongbin Liu,Zhengyan Chen,Yanling Jin,Fang Ren
The development of absorption-dominant electromagnetic interference (EMI) shielding materials with high-efficiency EMI shielding effectiveness (SE) and low reflection (R) is crucial but challenging for next-generation electronics devices and telecommunication. In this regard, a facile and environmentally friendly approach was proposed to fabricate N, S- co -doped TiC/carbon hybrid aerogels with hierarchically porous architecture through MXene/cellulose hybrid hydrogels as precursors for adsorbing dyes, followed by freeze drying and carbonization process. Profiting from the synergistic effect of highly interconnected three-dimensional (3D) porous structure, heterogeneous conductive network with greatly conductive difference as well as heteroatoms-doping induced dipole polarization, the resultant aerogel with an ultra-low density (47.1 mg/cm 3 ) achieves a highly efficient EMI SE of 84.3 dB at 12.4 GHz (average 81.8 dB in the X-band) and a superior absorption coefficient of 0.68 simultaneously. Meanwhile, the highly porous structure endows the prepared aerogels with outstanding thermal insulating capacity, which is essential to provide infrared stealth and radar stealth for military equipment and to protect sensitive electronic devices from high-temperature attacks. This work offers a prospective strategy for constructing high-performance absorption-dominated EMI shielding materials with excellent thermal insulation properties, and the obtained aerogels present broad application prospects in the fields of aviation, portable electronic equipment and national defense industry.
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