Journal of Cleaner Production
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2021
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IF 9.297
Gang Zhou,Yuying Wu,Peifang Wang,Hao Li,Rong Huang,Yitong Liu,Junhong Guo
Exploring photocatalysts to accelerate heavy metal Cr(VI) photoreduction is of great significance. Different from traditional strategies, this work proposes a simple and feasible strategy to construct cadmium/rhenium sulfide (CdS/ReS2) S-scheme heterojunctions for enhancing carrier separation through a covalent-anion-driven self-assembling approach. Herein, the construction of internal electric field induced by an atomic-hybridization at CdS/ReS2 interface drives the photoexcited electrons from one-dimensional CdS nanowires to two-dimensional ReS2 nanosheets upon light irradiation, resulting in the formation of an S-scheme carrier kinetic pathway, which enables the separation of electron-hole pairs to accelerate Cr(VI) photoreduction . As a result, the reduction reaction of CdS/ReS2 heterojunction is increased about 11.4 and 24.3 times compared to pristine CdS and ReS2. Our findings provide a new insight in regulating carrier transfer pathway and designing new-type photocatalysts .
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JOURNAL OF ELECTROANALYTICAL CHEMISTRY
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2021
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IF 4.464
Jun-Tao Cao,Jing-Lu Lv,Yu-Xiang Dong,Xiao-Jing Liao,Shu-Wei Ren,Yan-Ming Liu
A general spatial-resolved photoelectrochemical (PEC) sensing platform for sensitive and high-throughput protein analysis was developed by integrating CdS@g-C 3 N 4 heterojunction modified rotatable electrodes array with signal antibodies labeled Cu 2 O (Cu 2 O-Ab 2 ) conjugates. The disk substrate containing eight spatial-resolved working electrodes array was fabricated using acid etching treatment method. After stepwise immobilizing CdS@g-C 3 N 4 , capture antibodies (Ab 1 ), varied concentrations of target protein (prostate-specific antigen) and Cu 2 O-Ab 2 conjugates on the corresponding sensing sites, the immunosensor array was prepared completely. Combining the high photoelectric conversion efficiency of the photoactive material with the effective signal probe, the immunosensor exhibits high sensitivity. The proposed spatial-resolved immunosensing platform shows a working range of 1.0 × 10 -11 – 5.0 × 10 -8 g mL −1 with a detection limit of 5.0 pg mL −1 . The method provides a universal paradigm for near-simultaneously detection of multi-batch samples with good specificity and high sensitivity.
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APPLIED CATALYSIS B-ENVIRONMENTAL
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2021
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IF 19.503
Meng Li,Jingxue Sun,Gang Chen,Shunyu Yao,Bowen Cong,Pengfei Liu
In order to take full advantage of solar energy, the development of full spectrum photocatalysts have become focus of attention. Herein, the hollow FeS 2 /Bi 2 S 3 is constructed to enhance photocatalytic hydrogen evolution by the synergistic effect of photothermal property and thermoelectric effect. This is the first time to exploit the ΔT between the heat generated by photothermal effect and the cold photocatalytic system to provide driving force for pyroelectric effect. The FeS 2 can make the most of near infrared (NIR) light to thermogenesis and provide hot end for thermoelectric effect of Bi 2 S 3 . Under the environment of circulating condensed water, Bi 2 S 3 will cause spontaneous polarization and generate thermoelectric effect under the influence of temperature difference (ΔT) fluctuation. It releases the charge on the surface, so as to control the migration direction and rate of carriers in FeS 2 nanoparticles. The results of surface work function and COMSOL numerical simulation display that the improvement of photocatalytic efficiency is on account of the lower surface work function and high pyroelectric potential. The hydrogen production efficiency of FeS 2 /Bi 2 S 3 -3 reaches 16.8 mmol g −1 h −1 and has favourable cycle stability. This study provides a new insight for the design and construction of novel full spectrum photocatalysts.
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JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2021
·Vol. 32
·期 16
·21297-21307
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IF 2.478
Cao Yong,Luo Penghui,Xu Yang,Zhang Cong,Tian Chang,You Yuanqi,Tian Meiling,Wang Liqiong,Zhou Shenggang
In this paper, a hydrothermal synthesis method synthesized a foamed nickel (NF)-supported Ag-doped Ag 2 S@MoS 2 hydrogen evolution catalyst. Silver doping can improve the conductivity of MoS 2 , thereby improving the hydrogen evolution activity of MoS 2 . Compared with a single MoS 2 , the Ag 2 S@MoS 2 electrode has a larger specific surface area and has many highly catalytic S edges. In 1 M KOH, the overpotential of Ag 2 S@Ag 0.33 MoS 2 /NF electrode at 10 mA cm −2 is approximately 188 mV. Comparing with the overpotential of NF (391 mV) and MoS 2 /NF (290 mV), it is much lower. Further changing the amount of silver added, the overpotential of Ag 2 S@Ag 0.5 MoS 2 /NF is further reduced to 165 mV at a current density of 10 mA cm −2 . When the voltage is 0.35 V, the current densities of Ag 2 S@Ag 0.33 MoS 2 /NF (42.45 mA cm −2 ) and Ag 2 S@Ag 0.5 MoS 2 /NF (55.5 mA cm −2 ) are higher than those of NF (4.91 mA cm −2 ) and MoS 2 /NF (20.51 mA cm −2 ).
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JOURNAL OF HAZARDOUS MATERIALS
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2021
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IF 10.588
Feng Zhu,Xingyun Hu,Linghao Kong,Xianjia Peng
Sulfide precipitation is an efficient method to remove Cu(II) and As(III) from strongly acidic wastewater, but the instantaneous release of H 2 S from traditional sulfuration reagents causes serious H 2 S pollution. Moreover, the obtained precipitates are mixtures of CuS and As 2 S 3 , leading to difficulties in resource recovery. In this study, a calcium sulfide-organosilicon complex (CaS-OSCS), in which CaS was coated into a matrix of {[O 1.5 Si(CH 2 ) 3 NH]CS} n (OSCS) via the coordination bonding, was developed. OSCS, as a matrix of CaS-OSCS, can ensure the sustained and stable release of H 2 S under strongly acidic conditions owing to its low swelling (1.75% swelling ratio) and excellent acid resistance. The release longevity of H 2 S from CaS-OSCS extended from 5 min up to 50 min compared with that from CaS because the hydrophobic OSCS prevented solution diffusing to the pores of CaS-OSCS and thus slowed down the hydrolysis of CaS in pores. 99% of Cu(II)/As(III) was precipitated without H 2 S escape, and the dosage of sulfuration reagents was reduced by 30%. In addition, CaS-OSCS improved the selective separation of copper from wastewater, and a separation factor between Cu(II) and As(III) reached 2376. This study provides a potential approach for the elimination of H 2 S pollution and selective recovery of copper.
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Journal of Materials Chemistry C
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2021
·Vol. 9
·期 32
·10472-10477
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IF 7.393
Xia An,Chao Fan,Xiancheng Meng,Shuo Yuan,Yongkai Jing,Zhe Liu,Chun Sun,Yonghui Zhang,Zihui Zhang,Mengjun Wang,Hongxing Zheng,Erping Li
As an emerging two-dimensional material, tin disulfide (SnS2) has attracted growing interest due to its superior performance in high-speed and high-sensitive photodetectors. However, low responsivity, large dark current, and slow response speed severely hinder its further practical application. Herein, the enhanced photodetection performance of Schottky photodetectors based on SnS2 nanosheets and Schottky contact effects on the photodetection performance were investigated. High-quality SnS2 nanosheets were synthesized via a facile hydrothermal method. Then Schottky photodetectors with Pt/SnS2/Al and Au/SnS2/Al structures were fabricated and detected. Compared to the Ohmic Al/SnS2/Al photodetector, the Schottky Pt/SnS2/Al and Au/SnS2/Al photodetectors exhibited better photodetection performances, including tenfold higher responsivities, tenfold lower dark currents, and slightly shorter response times. In particular, the Schottky Pt/SnS2/Al photodetector obtained a low dark current of 5.2 nA, a high responsivity of 952 μA W−1, and a response time of 0.13 s. The enhancement in the photodetection performance of the Schottky photodetectors is due to the reverse bias and built-in electric field caused by Schottky contacts. Our finding provides an effective approach to enhance the photodetection performance of SnS2-based photodetectors for high-performance optoelectronic applications.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2021
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IF 8.128
Jiawei Ding,Kai Song,Chuangchuang Gong,Chenxu Wang,Yue Guo,Chunsheng Shi,Fang He
High-performance electromagnetic (EM) absorbers are necessary for military and industry application in view of the extensive utilization of EM devices. Carbon fibers (CFs) have been considered as promising candidates in electromagnetic wave (EMW) absorption materials, while the single carbon fiber material cannot achieve satisfactory EMW absorption performance because of its limited impedance matching. Herein, electrodeposition and hydrothermal methods were used to fabricate vertical hollow ZnS nanoarrays on carbon cloth (CC) substrate, and then one kind of novel flexible EM composite absorbers with excellent performance was obtained through adjusting morphology of hollow ZnS nanoarrays by easily changing the synthesis parameters of the precursor. Noteworthy, the miniaturized cone-shaped hollow ZnS nanoarray composite absorber shows excellent EMW absorption performance of strong absorption and wide absorption band. The maximum reflection loss value is −52.5 dB and the effective absorption bandwidth reaches 5.1 GHz when the thickness is only 1.9 mm. At the same time, the composite possesses the characteristics of light weight and thin thickness. The excellent properties of the composite absorbers are mainly attributed to their morphological structure. The unique hollow ZnS nanoarray structure enhances the interface polarization and multiple reflections, meanwhile also giving it the properties of metamaterials with resonant absorption. Furthermore, the adjustment of the ZnS nanoarray morphology can not only change the transmission behavior of EMW but also affect the resonance frequency and intensity of the ZnS nanoarray unit. This study obtains high-performance absorbing materials with flexible characteristics as well as highlights the importance of the adjustment of the morphological structure to improve the EMW absorption performance.
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Materials Chemistry Frontiers
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2021
·Vol. 5
·期 18
·6941-6950
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IF 6.482
Dongli Chen,Wenwei Zhan,Xue Fu,Ming Zhu,Jinle Lan,Gang Sui,Xiaoping Yang
Lithium–sulfur (Li–S) batteries with high theoretical capacity and low cost are challenged by the polysulfide shuttle effect and sluggish reaction kinetics. Herein, a functional composite interlayer consisting of metallic 1T-MoS2 with high catalytic activity and carbon fiber cloth is firstly designed and fabricated for high-performance Li–S batteries. The 1T-MoS2@carbon fiber cloth (1T-MoS2@CFC) composite interlayer with high electrical conductivity not only serves as the upper current collector to improve the utilization of the sulfur cathode, but also acts as a polysulfide barrier and trapper to suppress the shuttle effect of polysulfides by strong chemical interaction.
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ACS Sustainable Chemistry & Engineering
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2021
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IF 8.198
Yun Tong,Dongmei Feng,Pengzuo Chen
Developing highly efficient electrocatalysts for large-scale implementation of the hydrogen evolution reaction (HER) at a large current density is critical for renewable H2 fuel. The designed electrocatalysts by non-noble metals are expected to operate well at wide pH conditions, but it remains a major challenge. In this work, a novel dual modification strategy is applied to develop a series of P/Mo modified Ni3S2 on nickel foam (denoted as P-MNS/NF) as pH-universal electrocatalysts for HER. Benefiting from the plentiful catalytic active sites, optimized electronic structure, and improved reaction kinetics, the P-MNS/NF electrode realizes remarkable catalytic activity and stability at a large current density. The optimal P3-MNS3/NF catalyst exhibits the low overpotential of 245 and 243 mV at a high current density of 1 A cm–2 for both alkaline/acidic media. Those are promising performance results compared to those of the other nickel sulfide-based materials. Importantly, this P3-MNS3/NF can also achieve good performance in a neutral electrolyte. This needs a small overpotential of 360 mV to reach the current density of 0.5 A cm–2. Our strategy provides a new method to guide rational design of highly active HER electrocatalysts over a wide pH window.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2021
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IF 7.312
Quanfa Zhong,Qintie Lin,Wenjie He,Hengyi Fu,Zhuofan Huang,Yupeng Wang,Libin Wu
Tetracycline (TC) is a kind of refractory pollutant and widely exists in environment, and it is urgent to develop effective methods for TC treatment. In this study, nitrogen-doped biochar (N-BCX) was successfully synthesized and was used to activate persulfate (PS) to degrade TC. The materials were characterized by XPS, Raman spectrum, SEM, BET and FT-IR. SEM and BET results showed that the catalyst had an obvious pore structure and large specific surface area, which increased with increasing pyrolysis temperature. Nitrogen doping could increase the content of graphite-N in biochar; the defect edge of the material increased, further formed the graphitization structure, and enhanced the catalytic performance of the material. TC (20 mg/L) could be completely removed within 120 min under the optimal conditions of 200 mg/L of catalyst dosage, 2 mM of PS dosage and initial pH of 7. The results of EPR, quenching experiments and electrochemical experiments showed that the degradation of TC in the system did not depend on the action of radicals, the electron transfer between TC and PS on the surface of biochar maybe the main pathway. Efficient and environmentally friendly nitrogen-doped biochar can provide a reference for the related antibiotic wastewater treatment.
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ACS Applied Materials & Interfaces
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2021
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IF 9.229
Jingling Liu,Qihang Shen,Zhiwen Liu,Xueru Gao,Ziqi Zhang,Xinsheng Liu,Ke Cheng,Zuliang Du
Flexible Cu2ZnSnSe4 (CZTSe) solar cells gradually attract much attention due to their low-cost, lightweight, and environmentally friendly features. However, the efficiency of flexible CZTSe solar cells obtained through the nonvacuum green electrodeposition process remains sluggish (3.82%), far away from that obtained from other methods (∼10% by magnetron sputtering). Herein, a championed 6.33% efficiency of flexible CZTSe solar cells prepared by the electrodeposition process is achieved through an in situ electrochemical treatment (ET) process. It is found that the ET process drives the formation of a thin MoOx layer, evoking a series of beneficial results, thus accounting for an enhancement in photovoltaic performance. With the ET process, the MoSe2 thickness is compressed and Cu- and Sn-related undesirable defects/secondary phases are inhibited, leading to improved film quality. Additionally, it prolongs the depletion region width and minority lifetime, accelerates the charge separation and collection, relieves the band tails, and favorably reverses the band bending from downward to upward at/near grain boundaries. With these effects, the efficiency increases from 4.21% to 6.33%, far beyond the highest reports on electrodeposited flexible CZTSe solar cells. Our findings offer a promising way to improving Mo foil-based flexible devices and mark a significant breakthrough for the development of electrodeposition-processed flexible CZTSSe-based solar cells.
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MICROCHIMICA ACTA
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2021
·Vol. 188
·期 8
·1-9
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IF 5.833
Wang Lina,Zhang Li,Yu Ying,Lin Bixia,Wang Yumin,Guo Manli,Cao Yujuan
A sensitive electrochemical strategy was established for kanamycin determination. A specific aptamer was modified on the electrode as the probe, followed by a cyclic hybridization chain reaction (HCR) with methylene blue, causing an increasing signal response. In the presence of kanamycin, it can initiatively convolve the aptamer and prevent further DNA assembling, resulting in a signal distinction sensitive to the target amount. However, the signal reproducibility is low. To improve the precision, the HCR procedure was investigated. The results demonstrated that the optimal amount of assembled DNA is 12-fold to that of aptamer. This amount was then controlled in further assays. Admittedly, controlled DNA assembling commonly indicates a limited signal amplification. To further enhance the sensitivity, a nanocomposite based on MoS 2 and AuNPs was modified on the electrode. The results of the assay proved that the signal distinction sensitive to target amount increased by 50%. A linearity range is obtained from 0.01 nM to 1.0 μM of kanamycin, and the LOD is 8.4 pM. Subsequently, this strategy was employed to detect kanamycin in chicken liver and milk sample; the recovery results suggest that it possess a satisfactory application prospect in analysis of agricultural products. Graphical abstract
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危险品化学品经营许可证（带存储）