State‐of‐the‐Art Advances, Development, and Challenges of Metal Oxide Semiconductor Nanomaterials for Photothermal Solar Steam Generation

Tan, Kar Woon; Yap, Chun Man; Zheng, Zi-Yue; Haw, Choon Yian; Khiew, Poi Sim; Chiu, Wee Siong

doi:10.1002/adsu.202100416

Cited by 64 publications

(20 citation statements)

References 142 publications

(360 reference statements)

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“…Estimation of Water Evaporation Rates and Photothermal Conversion Efficiency: Water evaporation rates and photothermal conversion efficiency were calculated via the Equations ( 2) and (3) and previous reports. [44,48] The evaporation rate (ν) can be calculated via using the Equation ( 2):…”

Section: Methodsmentioning

confidence: 99%

2D Higher‐Metal Nitride Nanosheets for Solar Steam Generation

Wang

Shang

Yang

et al. 2022

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excellent electromagnetic wave absorption capacity and a localized surface plasmon effect, resulting in broadband light (UVvis-Infrared) absorption and excellent photothermal conversion efficiency. [8][9][10][11][12] Specifically, plasmonic TMN materials have displayed high melting points, excellent thermal and chemical stabilities, and are less expensive than noble metals such as Au. [13] Recently, group 4 TMNs (65% of HfN, 58% of ZrN, and 49% of TiN) exhibited higher photothermal transduction efficiencies than that of commercially Au (43%) samples because of their strong localized surface plasmon resonance effects. [14,15] However, most of these TMN compounds are usually formed from non-or sub-stoichiometric compositions and contain low nitrogen content. [16] Specifically, when the metallic atoms are in higher oxidation states, their corresponding metal nitride compounds are expected to form higher-metal (HM) nitrogen-rich (Nitrogen:Metal ratio >1) nitrides. These characteristics can result in some nitrides, such as HM-Mo 5 N 6 , posessing metallic properties resulting in improved electrocatalytic performance compared to nitrogen-poor nitrides. This can be attributed to the more complicated electron orbital hybridization state in Mo 5 N 6 compared to MoN. [17] For instance, the d band center positions of HM-Mo 5 N 6 and MoN are −1.96 and −2.28 eV. Therefore, the high valence state of Mo atoms in HM-Mo 5 N 6 and strong plasmon effect result in better catalytic activity and demonstrate great potential for solar-driven water generation. Alternatively, other HM nitrides, such as Ta 3 N 5 , demonstrate semiconductivity, which is advantageous for applications such as photoelectrochemical water splitting. [18] Furthermore, due to their higher oxidation states, HM-nitrides exhibit excellent corrosion resistance and high conductivity resulting in electrochemical catalytic behavior under harsh environments such as extremes of pH. [17,19] To date, chemical vapor deposition (CVD) has been explored to synthesize graphene, transition metal dichalcogenides (TMDs) hexagonal boron nitride (h-BN), and has also been used to obtain Mo 2 C, MoN, and Mo 5 N 6 nanosheets through the selection of specific precursors. [20][21][22][23][24][25] Furthermore, other researchers have also obtained metal nitrides via either the salt-template-assisted or atomic substitution methods under an ammonia atmosphere. [26][27][28][29][30] Although there has been Higher-metal (HM) nitrides are a fascinating family of materials being increasingly researched due to their unique physical and chemical properties. However, few focus on investigating their application in a solar steam generation because the controllable and large-scale synthesis of these materials remains a significant challenge. Herein, it is reported that higher-metal molybdenum nitride nanosheets (HM-Mo 5 N 6 ) can be produced at the gramscale using amine-functionalized MoS 2 as precursor. The first-principles calculation confirms amine-functionalized MoS 2 nanosheet effectively lengthens...

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Section: Methodsmentioning

confidence: 99%

2D Higher‐Metal Nitride Nanosheets for Solar Steam Generation

Wang

Shang

Yang

et al. 2022

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“…25,39 Current photothermal materials used in SSG applications can be classified into three major groups: plasmonic metals, semiconductors, and carbon-based and polymers. 40 The mechanisms of each classification of the photothermal materials are schematically illustrated in Figure 5. They are briefly reviewed in this section, and a short introduction on photothermal materials derived from biomass resources is included.…”

Section: Solar Thermal Conversion Materialsmentioning

confidence: 99%

Engineering Materials to Enhance Light-to-Heat Conversion for Efficient Solar Water Purification

Setyawan

Juliananda

Widiyastuti

2022

Ind. Eng. Chem. Res.

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Water scarcity has become one of the most prevalent problems afflicting people throughout the world and is expected to grow worse in the future due limited resources and increasing demand. This problem calls out for an urgent need to develop inexpensive, stand-alone desalination and water purification technologies that can adopt water resource distribution, water quality conditions, economic status, and developing levels of communities. Solar energy is abundantly available and has become one of the most promising emerging strategies in sustainable water treatment technologies. In this review paper, we highlight the recent progress of solar-driven desalination and water purification technologies for clean water production. We begin by introducing the fundamental concepts of solar radiation, solar thermal conversion, and heat localization. Then, we review the key components of solar steam generation including solar-thermal conversion materials, water pathways, and heat insulators and the strategies to promote efficient solar-to-vapor conversion in terms of chemical regulation, structural engineering, and heat management to maximize solar absorption and to minimize heat loss. Next, we discuss an efficient design of a solar steam generation device using an integrated approach that accounts for the performance of photothermal materials, heat losses, and water supply with respect to the hot evaporation region. Last, existing challenges and future opportunities in both fundamental studies and practical implementations of solar steam generation for water purification are discussed.

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“…[1][2][3] In recent years, increasing types of photothermal materials (PMs) have been designed based on interfacial evaporation, mainly including natural products, 4-10 polymers, [11][12][13][14][15] carbon materials, [16][17][18][19][20][21] and semiconductors. [22][23][24][25][26][27] Besides, the functions of the developed PMs are becoming increasingly comprehensive, mainly covering long-term salt resistance, 6,[28][29][30][31][32] self-cleaning [33][34][35][36][37] and collaborative power generation. [38][39][40][41][42][43][44] Collaborative power generation occurs due to the upward ow of water caused by solar-driven PMs, creating concentration and temperature differences between the interface and the water body, thus generating electricity and water vapor simultaneously.…”

Section: Introductionmentioning

confidence: 99%