RENEWABLE ENERGY
·
2026
·
IF 9.1
Shengqu Zhang,Enli Liu,Jiaxing Liu,Xintao Feng,Yaping Jian,Yinhua Jiang,Yuanzhi Hong
The advanced photocatalytic technology with conversion of renewable solar energy to the clean hydrogen (H 2 ) and hydrogen peroxide (H 2 O 2 ) chemicals can effectively realize the national goals of “carbon emission peak & carbon neutrality”. To this end, the indium sulfide (In 2 S 3 )/zinc indium sulfide (Zn 3 In 2 S 6 ) heterojunctions with double sulfur vacancies (Vs) were successfully prepared by a feasible in-situ hydrothermal approach. The as-formed heterojunctions (denoted as Vs-ISZIS6) showed the high-performance bifunctional activities towards the both photocatalytic H 2 evolution and H 2 O 2 generation. Especially, the 10Vs-ISZIS6 sample presented the highest photocatalytic H 2 production rate (7051 μmol/h/g), which is 32.1, 2.0, 14.4, and 1.4-folds greater than that of In 2 S 3 , Zn 3 In 2 S 6 , VS-In 2 S 3 , and Vs-Zn 3 In 2 S 6 , respectively. In addition, the 20Vs-ISZIS6 heterojunction possessed the optimum concentration of H 2 O 2 production with reaching 256.4 μM under 2 h of visible-light irradiation. The boosted photocatalytic performances might be caused by the synergistic effect of the presence of Vs and the construction of heterostructure between Vs-In 2 S 3 and Vs-Zn 3 In 2 S 6 , leading to the increasing visible-light absorption and promoting the photogenerated carriers separation efficiency. As a result, the possible mechanism of improved photocatalytic performances of the Vs-ISZIS6 heterojunctions was proposed. This work offers an available avenue for developing of nanostructured heterojunctions for sustainable solar-to-chemical fuel conversion.
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DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2026
·Vol. 14
·期 2
·121460
·
IF 7.2
Xin Wang,Rui Fang,Ruyi Meng,Ruiding Fei,Zhiping Yan
Photocatalytic hydrogen evolution reaction (HER) represents one of the key technologies for realizing renewable energy conversion and storage. However, the precise development of efficient HER photocatalysts remains a critical challenge due to rapid charge recombination. In this study, the NiS/Zn 0.5 Cd 0.5 S (NZCS-X) Schottky junctions were successfully synthesized by hydrothermal deposition of NiS nanoparticles on coral-like Zn 0.5 Cd 0.5 S nanoclusters. Under visible light irradiation, the optimal composite material achieves a hydrogen evolution rate of 104.48 mmol h −1 g −1 —over 41 and 2 times higher than that of pristine CdS (2.52 mmol h −1 g −1 ) and Zn 0.5 Cd 0.5 S (47.92 mmol h −1 g −1 ). Mechanistically, X-ray photoelectron spectroscopy (XPS) confirms the electron transfer from Zn 0.5 Cd 0.5 S to NiS. Femtosecond transient absorption (fs-TA) spectroscopy reveals that the average carrier lifetime decreases to 4.83 ps in the composite, providing direct evidence of ultrafast interfacial electron extraction. Density functional theory (DFT) calculations further demonstrate that metallic NiS acts as an electron sink to optimize the Gibbs free energy (ΔG H∗ ). This work concludes that the synergistic engineering of morphology and Schottky interfaces is a decisive strategy for designing high-performance sulfide photocatalysts.
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DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2024
·
IF 7.4
Kaixuan Feng,Ruixiang Lin,Tingyu Chen,Yuyan Hu,Yuheng Feng,Dezhen Chen,Mudassir Hussain Tahir,Tongcheng Cao
In this study, a catalytic system for N 2 O reduction by H 2 onto char decorated with transition metals is proposed, which have excellent reduction efficiency at low temperatures below 200 °C and efficiently utilizes pyrolysis char and hydrogen. Density functional theory (DFT) is used to reveal the reaction mechanism and found that transition metal decoration can significantly promote reaction rate and decrease the activation energy required for N 2 O reduction by H 2 on char, from 383.7 kJ/mol to 50–160 kJ/mol. Furthermore, transition states in the process of reducing N 2 O by H 2 over metal-char were observed, including reduction of N 2 O and the removal of the surface oxygen complex. Through kinetic analysis , the activation energy and reaction rate order was found as Ni-char (50.0 kJ/mol)>Co-char (95.1 kJ/mol)>Fe-char (151.0 kJ/mol)>Cu-char (158.8 kJ/mol). According to experiments phenomenon, the sequence of reduction efficiency over different metal-char was consistent with the simulation results and it was even possible to convert N 2 O to N 2 below 200 ℃. This research contributes to a more mechanistic understanding of the N 2 O-H 2 reaction over char and provides new insights for improving the design of catalysts for N 2 O abatement at low temperatures.
研究领域:
环境科学
·
催化化学
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高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2022
·Vol. 47
·期 47
·20561-20571
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IF 7.139
Tianyu Ai,Jing Li,Shuai Nie,Yansheng Yin,Jinlin Lu,Shuo Bao,Ling Yan
Transition elements doping metal oxide is of great significance for developing gas sensors with high performance. To achieve this goal, α-Fe 2 O 3 rod and Mn-doped α-Fe 2 O 3 polyhedrons are successfully synthesized by a facile N, N-dimethylformamide assisted hydrothermal method and characterized by several physical techniques. The morphology of α-Fe 2 O 3 is evolved by introducing Mn elements. The performance of the α-Fe 2 O 3 rod and Mn-doped α-Fe 2 O 3 polyhedrons as H 2 gas sensors are studied and compared. The Mn/α-Fe 2 O 3 -5 polyhedrons sensor exhibit the best performance at optimum operating temperature of 300 °C. The response and recovery times are 10 s/24 s for H 2 with a concentration of 200 ppm, which is much faster in contrast to those recently reported H 2 gas sensors. Furthermore, α-Fe 2 O 3 rod and Mn-doped α-Fe 2 O 3 polyhedrons show abnormal n-p transition sensing behavior with the change of operating temperature. This work provides a facile method for synthesizing α-Fe 2 O 3 based sensing materials for various sensors applications.
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高影响因子
CATALYSIS LETTERS
·
2018
·Vol. 148
·期 12
·3741-3749
·
IF 2.911
Ge Jianhua,Jiang Daochuan,Zhang Lei,Du Pingwu
Photocatalytic hydrogen evolution is considered as one of the promising pathways to settle the energy crises and environmental issues by utilizing solar energy. In this paper, noble-metal-free Ni 2 P was used as cocatalyst to enhance g-C 3 N 4 for photocatalytic hydrogen production under visible light irradiation (λ > 420 nm). Characterization results indicated that Ni 2 P nanoparticles were successfully loaded onto g-C 3 N 4 , which can significantly contribute to accelerate the separation and transfer of photogenerated electron. The hydrogen evolution rate reached ∼ 270 µmol h −1 g −1 and the apparent quantum yield (AQY) was ∼ 2.85% at 420 nm. Meanwhile, there is no obviously decrease of the hydrogen production rate even after 36 h under visible light illumination. In addition, the mechanism of photocatalytic hydrogen evolution was also elaborated in detail. Graphical
研究领域:
光催化
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材料科学
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氢能源
·
可再生能源
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Xing-Liang Yin,Lei-Lei Li,Jian-Hua Jiang,Xin-Xin Du,Dong-Hui Pang,Jie Yang,Zhong-Jia Li,Yuan-Xu Wang,Xin-Yue Li,Da-Cheng Li,Jian-Min Dou
Photocatalytic H 2 evolution from water splitting offers an attractive scientific and technological method to address the energy and environmental crisis. In this study, noble-metal-free Zn 0.5 Cd 0.5 S@MoS 2 core@shell nanoheterostructures were elaborately designed and successfully synthesized. The visible-light-driven photocatalytic performance investigation shows that the Zn 0.5 Cd 0.5 S@MoS 2 exhibits a state-of-the-art H 2 evolution rate of 40.2 mmol g −1 h −1 far exceeding that of pristine Zn 0.5 Cd 0.5 S by more than 57 times. Moreover, thanks to the protection of MoS 2 shells, the Zn 0.5 Cd 0.5 S@MoS 2 can retain long-term stability in four-cycles of 24 h reactions. Furthermore, a tentative mechanism on H 2 generation was systematically investigated and proposed, which contributes to understand the enhanced photocatalytic activity of the Zn 0.5 Cd 0.5 S@MoS 2 heterostructures and may inspire the synthesis of other desirable catalytic systems.
研究领域:
材料科学
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物理化学
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能源化学
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纳米催化
·
光化学
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DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
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2016
·
IF 8.328
Aiping Wu,Chungui Tian,Yanqing Jiao,Qing Yan,Guoyu Yang,Honggang Fu
The visible-light driven, Pt-free photocatalytic H 2 evolution (PHE) is promising for clean and sustainable H 2 production. The construction of the heterojunction structure with intimate contact and good light adsorption ability is important for realizing the high effective PHE. Here, the core-shell structured MoS 2 /CdS hybrids were constructed through “sequential two-step hydrothermal growth” route for Pt-free PHE. In the synthesis, the hierarchical flower-like MoS 2 was firstly obtained through the reaction of ammonium molybdate and excessive thiourea. Subsequently, without need of centrifugation, the cadmium acetate (Cd source) was added into the cooled MoS 2 solution directly followed by a secondary hydrothermal reaction. In the process, the Cd 2+ could react with partially S 2− in MoS 2 (substituted reaction) and with the excessive S 2− ions in solution to generate CdS, resulting in the formation of CdS shell contacted with MoS 2 core. The micro-structure of the composites (such as the thickness and morphology of CdS shell) could be tuned by changing the amount of Mo source and Cd source. In the composites, the CdS on the outside is convenient to absorb the solar light. The intimate contact of CdS and MoS 2 is beneficial to charge transfer. As a result, the MoS 2 /CdS catalyst showed high catalytic activity for PHE under visible light irradiation (λ > 420 nm). The H 2 evolution rate could reach to 775 μmol h −1 (20 mg catalyst), which is much higher than pure CdS (12 μmol h −1 ) and Pt-CdS (64 μmol h −1 ). The good activity should be related with CdS outside shell beneficial for light adsorption and intimate contact of CdS and MoS 2 for easy charge transfer. A series of experiments demonstrate that the formation of the heterojunction can effectively enhance the charge transfer ability and retard the recombination of electron-hole pairs, thus improving PHE activity and alleviating the photocorrosion of CdS component.
研究领域:
材料科学
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光催化
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能源化学
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纳米材料
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可持续能源
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DOI
高影响因子
Journal of Materials Chemistry A
·
2021
·Vol. 9
·期 17
·10893-10908
·
IF 12.732
Yuanyuan Zhang,Yunfeng Qiu,Zhuo Ma,Yanping Wang,Yongxia Zhang,Yuxin Ying,Yinan Jiang,Yixue Zhu,Shaoqin Liu
The simultaneous improvement of intrinsic activities and the number of active sites in electrocatalysts is the bottle-neck issue for H2 production. Herein, commercial CNTs serving as conductive kernels are in situ coupled with 3D ZIF-67 derived Co/CoP core-corona clusters. Such a hierarchical bead string nanostructure not only possesses highly exposed active sites, but also favours fast electron transfer for electrocatalytic kinetics. Our material shows excellent HER (η10 = −151 mV) and glucose oxidation reaction (GOR) performance, showing a smaller hybrid water splitting potential of 1.42 V compared to conventional water splitting (η10 = 1.74 V) for H2 production. DFT calculations indicate that the Schottky heterointerface at Co/CoP decreases the initial H2O dissociation energy barrier and possesses a thermoneutral H* adsorption free energy for the HER, as well as reducing the energy barrier for the GOR. Meanwhile, more oxidative cobalt oxyhydroxide favoured the GOR process. The present work opens a new avenue for designing Mott–Schottky multifunctional electrocatalysts for both energy-saving H2 production and value-added products.
研究领域:
材料科学
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能源化学
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催化科学
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DOI
高影响因子
Surfaces and Interfaces
·
2024
·
IF 5.7
Fengyun Su,Mengzhen Tian,Hailong Cao,Zhishuai Wang,Qiang Zhao,Haiquan Xie,Yezhen Zhang,Xiaoli Jin,Xin Li,Zhengdao Li
Semiconductor-based photocatalytic water splitting enables the conversion of abundant solar energy to green and renewable hydrogen energy. Graphitic carbon nitride (g-C 3 N 4 ) is synthesized using a straightforward method, demonstrating stable physicochemical properties and possessing an optimal bandgap, thus positioning it as a promising photocatalyst in the realm of environmental sustainability. Oxygen vacancies are extensively employed to modulate light absorption and surface properties of metal-oxide semiconductors. In this study, g-C 3 N 4 nanosheets were coupled with oxygen-deficient tungsten trioxide (WO 3-x ) to form heterojunction photocatalysts ( X -WOCN). Comprehensive material characterization results demonstrated that the constructed heterojunction extended the visible light absorption range, improved photogenerated electron-hole separation efficiency, and thus augmented photocatalytic activity . Notably, the optimum hydrogen evolution rate of 6 %-WOCN was enhanced by 5.4-fold compared to that of g-C 3 N 4 . Furthermore, we propose a Z-scheme heterojunction charge separation mechanism mediated by oxygen defects and support this mechanism through detection of surface-active substances •O 2 − and •OH. This study offers novel propositions into the function of oxygen defects in facilitating charge separation within Z-scheme heterojunction.
研究领域:
光催化
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材料化学
·
能源科学
·
半导体物理
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环境可持续性
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纳米材料
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DOI
高影响因子
Catalysis Science & Technology
·
2017
·Vol. 7
·期 17
·3802-3811
·
IF 5.773
Hong Liu,Jingchai Meng,Jiang Zhang
In this work, we demonstrated the polyvinylpyrrolidone-assisted solvothermal synthesis of three-dimensional (3D) flowerlike Mn0.8Cd0.2S microspheres assembled from nanosheets. The as-synthesized products were characterized by using various methods including powder X-ray diffraction, scanning electron microscopy, transmission electron microscopy, high-resolution transmission electron microcopy/selected area electron diffraction, elemental mapping, X-ray photoelectron spectroscopy, inductively-coupled plasma emission spectroscopy, N2 adsorption–desorption, UV-vis diffuse reflectance spectroscopy, photoluminescence spectroscopy and photoelectrochemical experiments. The possible formation mechanism of the unique structures was discussed. The resultant 3D flowerlike Mn0.8Cd0.2S architectures exhibit better photocatalytic activities for H2 evolution and CO2 reduction under visible light irradiation than the Mn0.8Cd0.2S nanoparticles. A hydrogen evolution rate of 3560.3 μmol g−1 h−1 and a CH3OH production rate of 10.7 μmol g−1 h−1 are achieved on the flowerlike Mn0.8Cd0.2S microspheres. Several possible reasons for the enhanced photocatalytic activity of the Mn0.8Cd0.2S hierarchical microspheres have been taken into consideration. In addition, the Mn0.8Cd0.2S microspheres are stable during the reaction and can be used repeatedly.
研究领域:
材料科学
·
环境化学
·
能源化学
·
纳米科技
·
催化化学
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DOI
高影响因子
Nanomaterials
·
2021
·Vol. 11
·期 11
·3122
·
IF 5.076
Rao Fu,Yinyan Gong,Can Li,Lengyuan Niu,Xinjuan Liu
The development of highly active and stable photocatalysts, an effective way to remediate environment pollution and alleviate energy shortages, remains a challenging issue. In this work, a CdIn2S4/In(OH)3nanocomposite was deposited in-situ on NiCr-LDH nanosheets by a simple hydrothermal method, and the obtained CdIn2S4/In(OH)3/NiCr-LDH heterostructure photocatalysts with multiple intimate-contact interfaces exhibited better photocatalytic activity. The photocatalytic H2evolution rate of CdIn2S4/In(OH)3/NiCr-LDH increased to 10.9 and 58.7 times that of the counterparts CdIn2S4and NiCr-LDH, respectively. Moreover, the photocatalytic removal efficiency of Cr(VI) increased from 6% for NiCr-LDH and 75% for CdIn2S4to 97% for CdIn2S4/In(OH)3/NiCr-LDH. The enhanced photocatalytic performance was attributed to the formation of multi-interfaces with strong interfacial interactions and staggered band alignments, which offered multiple pathways for carrier migration, thus promoting the separation efficiency of photo-excited electrons and holes. This study demonstrates a facile method to fabricate inexpensive and efficient heterostructure photocatalysts for solving environmental problems.
研究领域:
材料科学
·
环境科学
·
能源科学
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DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2024
·
IF 8.1
Kelin Li,She Chen,Mengbo Li,Linlin Liu,Yunjie Li,Feng Wang
Ammonia is a promising carrier for energy storage due to its high hydrogen content, low storage and transportation costs, and zero carbon emissions. Plasma catalysis shows excellent potential for sustainable ammonia synthesis; however, searching for suitable catalysts is ongoing. La(OH) 3 was studied due to its rich basic sites and oxygen vacancies, which are beneficial for plasma-catalyzed ammonia synthesis. The optimal reaction conditions were investigated, and a maximum ammonia synthesis rate of 37.13 μmol/(min•g -cat ) was achieved. H 2 plasma treatment enhanced the catalytic activity of La(OH) 3 , and ammonia synthesis rate of 40.00 μmol/(min•g -cat ) were achieved. This study contributes to the development of efficient catalysts for plasma-catalyzed ammonia synthesis and highlights the potential of La(OH) 3 as a promising catalyst.
研究领域:
化学工程
·
材料科学
·
能源科学
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DOI
高影响因子
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